Accelerometers are used in a variety of applications ranging from navigation systems to stand-alone tests. In each application, the accuracy of the accelerometer is crucial. There are various calibration techniques that range in precision, yet each apparatus devised to calibrate the accelerometer is quite complex. A calibration method of less complexity is desired to calibrate stand-alone accelerometers that require moderate accuracy. One stand-alone accelerometer, the X16-1D, was used to investigate calibration techniques. Six calibration techniques were investigated to determine an efficient method to calibrate a stand-alone accelerometer. Each method provided a different acceleration component that was modeled by theoretical equations. For all six methods, test variables were established to determine the accelerometers ability to track acceleration. Each test was compared to the theoretical acceleration model to determine the effectiveness of the calibration technique. The overall errors of each
A novel method is introduced for developing calibration models for the spectroscopic measurement of chemical concentrations in an aqueous environment. To demonstrate this matrix-enhanced calibration procedure, we developed calibration models to quantitate glucose and glutamine concentrations in an insect cell culture medium that is a complex mixture of more than 20 components, with three components that manifest significant concentration changes. Accurate calibration models were generated for glucose and glutamine by using a calibration data set composed of 60 samples containing the analytes dissolved in an aqueous buffer along with as few as two samples of the analytes dissolved in culture medium. Standard errors of prediction were 1.0 mM for glucose and 0.35 mM for glutamine. The matrix-enhanced method was also applied to culture medium samples collected during the course of a second bioreactor run. Addition of three culture medium samples to a buffer calibration reduced glucose prediction errors from
Two multivariate calibration methods are compared for the simultaneous chromatographic determination and separation of Sulfamethoxazole (SMX) and Phthalazine (PHZ) by High Performance Liquid Chromatography (HPLC). Multivariate calibration techniques such as Classical Least Squares (CLS) and Inverse Least Squares (ILS) were introduced into HPLC to determine the quantification by using UV detector at 235, 250, 260 and 270 nm. Sixteen binary mixtures of SMX and PHZ as calibration set and eight binary mixtures as prediction set were used. Results show that, Relative Errors of Prediction (REP) of CLS and ILS for SMX and PHZ were 0.17%, 0.63% and o.15%, 0.56%, respectively.
We describe a new resist model calibration procedure and its implementation in LithoCruiserTM. In addition to the resist calibration, LithoCruiser is used to perform simultaneous optimization for numerical aperture (NA), mask OPC, and illumination profile with built-in manufacturing constraints for ASML illumination diffractive optical elements (DOE). This calibration procedure uses a global optimization algorithm for resist parameter tuning, matching the simulated and measured 2D resist contours at a user-defined multiple CD sampling across the selected developed 2D resist patterns. Using lumped parameter type resist models and vector high-NA simulation engine, this resist calibration procedure showed an excellent calibration capability of max CD error range < ±4nm for the CPL 70nm DRAM patterns. Calibration results for CPL 130nm contact hole patterns are also included in this manuscript. Dependency of the calibrated model parameters on lithography process (i.e., Quasar, C-Quad illumination ...
An advanced wavelength calibration process with higher wavelength accuracy is developed based on the conventional calibration method of micro-spectrometers with multichannel detectors. The deficiencies of the conventional method in acquiring sufficient well-spaced and adequately accurate wavelength-pixel data for calibration are analyzed. And three steps are added to the conventional method before the final pixel-wavelength fit is carried out. First, segmented data collection is carried out to ensure sufficient well-spaced lines for calibration. Second, sub-pixel analysis is executed to increase sampling rate. Third, peak fit is implemented to acquire more accurate central wavelength positions. The simulated experiment was based on a compact spectrometer with a crossed Czerny-Turner optical design. Mercury and Argon line spectra are used as wavelength standards. A linear image sensor with 1024 pixels each 25μm in width is used as the detector. In the new calibration process the whole spectral ...
Closes an open external calibration session. LabVIEW NXG does not support FPGA devices Not supported in VIs that run in a web application DAQmx Close External Calibration.vi :/lvdaqmx.chm::/mxcloseextcal.html calHandle in calHandle in is a reference to the calibration session that you creat
Nowadays, a large number of chiral analyses are needed, simple and rapid methods for the determination of the enantiomeric composition in pharmaceutical products should be developed. The fluoxetine belongs to the most prescribed antidepressant chiral drugs and its enantiomers have a different duration of serotonin inhibition. This study presents cheap and fast alternative to traditional chiral techniques for the determination of the fluoxetine enantiomeric composition by the combination of UV/VIS spectrometry and multivariate calibration. The chiral recognition of the fluoxetine was based on the creating of the diastereomeric complexes with α- and β- cyclodextrin. Multivariate calibration methods, including principal component regression (PCR) and partial least square method (PLS), were used for spectral data evaluation. Small differences in results between eachcyclodextrin and both calibration models were obtained by multivariate calibration. PLS model for determination of the enantiomeric ...
The IIP2 requirement in fully integrated direct-conversion receivers using FDD duplexing is prohibitively high and demands the use of an external filter in order to attenuate the leakage from the transmitter. This paper presents a digital calibration technique for passive CMOS down-converters that allows a direct conversion receiver achieve the requirements without external filtering. A Least-Mean-Square optimization algorithm is used in order to reduce the low-frequency second-order intermodulation product. The algorithm controls the digital calibration structures at the biasing of the passive mixer and adapts them until the second order intermodulation drops below the noise level. The method is tested by calibrating a 1.2-V 65nm CMOS passive mixer targeting UMTS/LTE applications at several corner conditions including worst case mismatches in the switching pairs.. ...
A new method for performing a full two-port s-parameter calibration in free-space is presented. The proposed calibration technique computes the error coeff
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Starts an external calibration session on a device. LabVIEW NXG does not support FPGA devices Not supported in VIs that run in a web application DAQmx Initialize External Calibration.vi |helpdir|:/lvdaqmx.chm::/mxinitextcal.html device in device in is the name as configured in MAX of the device to w
Improved Calibration vector network analyzer calibration method of storing sparse data, using the measurements from each of the vector network analyzer calibration data sparse system error interpolated data, and system data and uncorrected errors from each frequency measurement measurement data to create measurement data calibration. It may be measured by the measuring frequency range greater than the specified frequency range of calibration every N th frequency step, or by the measurement of the calibration of each frequency step of the frequency range and the length measurement data obtained by compression, to produce calibration data sparse. Interpolation algorithm may be used by fitting a polynomial curve fitting parameters such as curve algorithm.
The need for custom footwear among the consumers is growing every day. Serious research is being undertaken with regards to the fit and comfort of the footwear. The integration of scanning systems in the footwear and orthotic industries have played a significant role in generating 3D digital representation of the foot for automated measurements from which a custom footwear or an orthosis is manufactured. The cost of such systems is considerably high for many manufacturers due to their expensive components, complex processing algorithms and difficult calibration techniques. This thesis presents a fast and robust calibration technique for a low-cost 3D laser scanner. The calibration technique is based on determining the mathematical relationship that relates the image coordinates to the real world coordinates. The relationship is determined by mapping the known real world coordinates of a reference object to its corresponding image coordinates by multivariate polynomial regression. With the ...
Ohaus Pioneer PA4202C precise scale weighs up to 4200 grams in 0.01 gram increments and has internal motorized calibration. A simple press of the CAL keypad starts the internal calibration.
Zhang model [two][3] can be a camera calibration process that makes use of traditional calibration procedures (identified calibration factors) and self-calibration methods (correspondence concerning the calibration details when they are in different positions). To execute an entire calibration from the Zhang technique at least three different pictures of your calibration focus on/gauge are expected, possibly by relocating the gauge or even the digital camera alone ...
The present invention provides a method of calibrating a spectroscopic device for providing a non-invasive measurement of an analyte level in a sample. The method comprises the steps of: (a) providing a plurality of calibration algorithms; (b) taking a set of non-invasive measurements on said sample with said spectroscopic device; (c) calculating a predicted set of analyte levels for each of the calibration algorithms in response to the set of non-invasive measurements, each of the predicted sets of analyte levels being characterized by a variability range, a slope, an R 2 (a square of the correlation between said set of non-invasive measurements and said predicted set of analyte levels), and a standard error of prediction; and (d) selecting an appropriate calibration algorithm by using a suitability score based on the variability range, the slope, the R2 an the standard error of prediction for each of the predicted sets of analyte levels. A method of generating suitable calibration algorithms in step
Sartorius Entris Precision Balances - PROMO Internal Calibration; Capacity: 420g Balances, Scales and Weighing:Laboratory Balances:Analytical Balances
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Many anisotropic phenomenological yield functions have been proposed in the literature in which their predictive capabilities strongly depend on the experimental calibration data as well as the calibration procedure to identify the anisotropy parameters. In this paper, emphasis is placed upon the experimental and numerical calibration procedure of anisotropic yield functions in the region of shear loading (zero hydrostatic stress with equal and opposite in-plane principal strains and stresses). Conventional anisotropic calibration procedures are shown to introduce non-physical artefacts into constitutive models which manifest as a non-zero hydrostatic stress or through-thickness strains generated under in-plane shear stress that violate the definition of the shear loading condition. To overcome this issue, a new physically necessary constraint is applied on the plastic potential to enforce equal and opposite principal strains in the shear state and correct the shear region of anisotropic yield ...
A method and apparatus for measuring the concentration of an analyte present in a biological fluid is disclosed. The method includes the steps of applying NIR radiation to calibration samples to produce calibration data, analyzing the calibration data to identify and remove outliers, constructing a calibration model, collecting and analyzing unknown samples to identify and remove outliers, and predicting analyte concentration of non-outliers from the calibration model. Analysis of the calibration data includes data pretreatment, data decomposition to remove redundant data, and identification and removal of outliers using generalized distances. The calibration model may utilize principal component regression, partial least squares, multiple linear regression, or artificial neural networks, and reduction using principal component analysis or partial least squares scores. Unknown sample data is analyzed using data pretreatment followed by projection into the calibration model space, and identification and
A visual sensor calibration method of calibrating of a visual sensor in a robot system. A pattern plate is provided on an arm of a robot, and the calibration pattern data (CPDr) of the pattern plate on robots base coordinates is sent from a robot controller to a visual sensor controller. The visual sensor controller picks up an image of the pattern plate by a camera to obtain calibration pattern data (CPDc). The calibration data (CD) is obtained from the calibration pattern data (CPDr) and the calibration pattern data (CPDc), to thereby calibrate the visual sensor.
The development of a viable self-calibration approach for use with non-metric cameras was investigated. Both computer generated and actual test camera data were generated to determine the effectiveness of the math model and computer program. A twenty-seven parameter bundle adjustment routine was proposed because of its versatility and compatible use in an existing aerotriangulation package. For the camera and test configuration considered, the focal length was recovered to within two percent, and the principal point location was recovered to wi thin O. 3 to twelve percent. When the computer generated data was used, the focal length and principal point offset were recovered to within 0.2 percent.. Modeling and software has been made available for a future comparative study between the self-calibration and Direct Linear Transformation adjustment parameters. The self-calibration modeling and former Direct Linear Transformation modeling software is a promising tool for mensuration tests and ...
Article Sensitivity of the performance of a conceptual rainfall–runoff model to the temporal sampling of calibration data. The effect of the time step of calibration data on the performance of a hydrological model is examined through a numeric...
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Utilizing multiple instructors with deep expertise in dimensional calibration methods and practice, this course is unlike any other calibration course. With hands-on exercises, the first day of this course covers key principles that apply to all calibration situations, such as selection of calibration methods, use of appropriate reference standards, reporting of results, and traceability. Students will perform actual calibrations, learn and practice techniques to improve accuracy of results, and understand how the general principles learned in class can be extended to the development of other calibration methods. Day two of the course moves into a series of demonstrations and hands-on practice of various calibrations, and by the end of day two, the students will have covered all of the most common dimensional calibrations, including micrometers, calipers, dial indicators, test indicators, digital indicators, height gages, and micrometer standards. Day three provides for opportunities to cover ...
Utilizing multiple instructors with deep expertise in dimensional calibration methods and practice, this course is unlike any other calibration course. With hands-on exercises, the first day of this course covers key principles that apply to all calibration situations, such as selection of calibration methods, use of appropriate reference standards, reporting of results, and traceability. Students will perform actual calibrations, learn and practice techniques to improve accuracy of results, and understand how the general principles learned in class can be extended to the development of other calibration methods. Day two of the course moves into a series of demonstrations and hands-on practice of various calibrations, and by the end of day two, the students will have covered all of the most common dimensional calibrations, including micrometers, calipers, dial indicators, test indicators, digital indicators, height gages, and micrometer standards. Day three provides for opportunities to cover ...
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An identification of the model parameters for a parallel cable-driven robot is performed by using both a calibration and a self-calibration approach. The manipulator studied is based on a parallel architecture having 8 cables to control the 6 degrees of freedom of its mobile platform so that the mobile platform is fully constrained by the cables. Under some hypotheses on cable properties, the interest of redundancy in actuation is exploited to self-calibrate by using proprioceptive sensors. This approach is compared to the difficulties to implement a calibration process. Additionally, advanced tools and algorithmic improvements are presented to perform the parameter identification. A complete experimentation validates the robot accuracy improvement after calibration or self-calibration. We show that the basic hypotheses on cable properties are verified. Moreover, the investment in terms of time and cost to obtain the external measurements for calibration process does not bring better results and does
Fisher Scientific - OHAUS Adventurer Precision Balances with External Calibration - Strikes the ideal balance between inventive features and functional, uncomplicated weighing capabilities.
Fisher Scientific - OHAUS Adventurer Precision Balances with External Calibration - Strikes the ideal balance between inventive features and functional, uncomplicated weighing capabilities.
The CU100 calibration unit is designed for calibrating pressure gauges, pressure transmitters and recorders.The calibration of pressure transducers can be performed fully automatically according to the international standard. The pressure is generated automatically by a servo driven spindle pump.. The calibration of test objects, such as a mechanical pressure gauge is not fully automated, a human interaction is necessary to read out the DUT (Devise Under Test).. The automatic calibration of the process has several advantages. Software configurations for your calibration process can be saved and shared. Therefore the process can be reliably duplicated by multiple operators on different locations, and over time. The quality of the calibration process will be improved by eliminating operator errors and applying standardized methods. The measurement results are recorded in an electronic calibration report, which can be preserved for the recording of the history of a DUT.. The software application ...
Figure 4: Comparative analysis between the proposed fish-eye correction approach and fish-eye correction with calibration patterns. (a) The reprojection errors attained using a calibration pattern (CB) to correct fish-eye distortion and using the proposed method. Notice the residual difference with the traditional calibration approach. The reprojected pixel locations are illustrated in (b) and (c) for CB and for our approach, respectively. (d) Comparative analysis of the height estimation error in different locations of the scene. (f) The pan-tilt angle error when observing a human being in different scene locations ...
Calibration is the process of identifying and correcting for the systematic bias component of the error in sensor measurements. Traditionally, calibration has usually been conducted by considering a set of measurements in a single time frame and restricted to linear systems with the assumption of equal-quality sensors and single modality. The basis for the new calibration procedure is to construct a statistical error model that captures the characteristics of the measurement errors. Such an error model can be constructed either off-line or on-line. It is derived using the nonparametric kernel density estimation techniques. We propose four alternatives to make the transition from the constructed error model to the calibration model, which is represented by piecewise polynomials. In addition, statistical validation and evaluation methods such as resubstitution, is used in order to establish the interval of confidence for both the error model and the calibration model. Traces of the distance ...
Get this from a library! Calibration procedure for signal generator SG-1170/U (Wavetek, models 3001 and 3001/608).. [United States. Department of the Army.;]
Get this from a library! Calibration procedure for digital multimeter AN/PSM-45 (Simpson, Model 467).. [United States. Department of the Army.;]
CalPro is a database of complete step-by-step calibration procedures covering more than 60 types of measuring devices-from gage blocks to micrometers and calipers.
Apparatus and methods are disclosed for the calibration of a tracked imaging probe for use in image-guided surgical systems. The invention uses actual image data collected from an easily constructed calibration jig to provide data for the calibration algorithm. The calibration algorithm analytically develops a geometric relationship between the probe and the image so objects appearing in the collected image can be accurately described with reference to the probe. The invention can be used with either two or three dimensional image data-sets. The invention also has the ability to automatically determine the image scale factor when two dimensional data-sets are used.
The SSC Mass Calibration System Power Switch Board supports the SSC Mass Calibration Systems for the ZSC31010, ZSC31015, and ZSC31050 sensor signal conditioner (SSC) ICs (DUTs). It enables switching a power supply for the DUTs of up to 40VDC. It is ordered separately. ...
The factors affecting the sensitivity and hence the calibration of Eppley Normal Incidence Pyrheliometers are discussed. A method for controlling these factors in a design suitable for balloon flight is described. Using these techniques ground calibration procedures are described. Data obtained during the ground calibration are presented. Analyses of these data indicate that it is possible to calibrate these units against an Eppley Angstrom pyrheliometer with an accuracy of plus or minus 0.05% if one performs the calibration from a high altitude site on days when the atmospheric conditions are proper. These calibrations employ the same measurement system that will be used for a series of balloon flights; hence the calibration accuracy should be maintained during such a flight. (Author)(*PYRHELIOMETERS
Hello all, I've been getting "Power Calibration Errors" every time I've attempted to burn a CD. I won't even get half way through a burn...I can get through the "lead-in" portion of the burn, but once the burner actual…
Accurate robot camera calibration is a requirement for vision guided robots to perform precision assembly tasks. In this paper, we address the problem of doing intrinsic camera and hand-eye calibration on a robot vision system using a single point marker. This removes the need for using bulky special purpose calibration objects, and also facilitates on line accuracy checking and re-calibration when needed, without altering the robots production environment. The proposed solution provides a calibration routine that produces high quality results on par with the robot accuracy and completes a calibration in 3 minutes without need of manual intervention. We also present a method for automatic testing of camera calibration accuracy. Results from experimental verification on the dual arm concept robot FRIDA are presented.. ...
MALDI Calibration Standard is a 6 peptide mixture designed to calibrate MALDI TOF/TOF mass spectrometers. This calibration standard is lyophilized for long shelf-life and easy reconstitution, and the advanced peptide mixture provides maximum accuracy when fine-tuning your instrument.
Power Calibration Errors when writing to DVD-R with Nero6. I cant burn DVD images, VIDEO_TS folders or Data DVDs. I never had this problem in the
Precision Calibration Laboratories / Quality Testing Services, an ISO/IEC 17025, A2LA Accredited Calibration Lab has extensive calibration capabilities in a wide array of metrology disciplines, including; NDT Test Equipment, Electrical, DC/Low Frequency, RF/MW, Physical Dimensional, Mechanical, Torque, Temperature, Pressure, Weights and Measures, and Light. Our Calibration Labs, Quality System meets the requirements of ISO/IEC 17025 and ANSI Z540.1; as well as compliance with applicable international standards and regulations.. Our Metrologists have years of experience, specialized training in Metrology principles, and hands-on expertise to provide the highest quality calibration results. Our A2LA Accredited Calibration Lab is equipped with some of the latest state-of-the-art, precision NIST Traceable calibration standards as defined in our Scope of Accreditation.. ...
METCAL program structure and the hierarchy of calibration standards facilities. Refer to Electronics Installation and Maintenance Book, Test Equipment, NAVSEA SE000-00-EIM-040, chapter 1, for explanations of the calibration echelons shown in figures 7-10 and 7-11. Calibration Services Now let s take a look at an important calibration program called the Metrology Automated System for Uniform Recall and Reporting (MEASURE) program. The MEASURE program is an automated data processing system designed to provide a standardized system for the recall and scheduling of test equipment into calibration facilities. It was developed to support the Department of the Navy METCAL Program in an effort to ensure that all equipment requiring calibration and servicing is submitted to a calibration activity on a timely basis and, thus, is maintained to maximum dependability. In addition, the system provides documentation of actions performed by the calibration activity. The initial cycle of MEASURE begins with the ...
Head movements degrade the image quality of high resolution Positron Emission Tomography (PET) brain studies through blurring and artifacts. Manny image reconstruction methods allows for motion correction if the head position is tracked continuously during the study. Our method for motion tracking is a structured light scanner placed just above the patient tunnel on the High Resolution Research Tomograph (HRRT, Siemens). It continuously registers point clouds of a part of the patients face. The relative motion is estimated as the rigid transformation between frames. A geometric calibration between the HRRT scanner and the tracking system is needed in order to reposition the PET listmode data or image frames in the HRRT scanner coordinate system. This paper presents a method where obtained transmission scan data is segmented in order to create a point cloud of the patients head. The point clouds from both systems can then be aligned to each other using the Iterative Closest Point (ICP) algorithm ...
An ocean calibration tool is developed for the calibration of the forthcoming ASCAT scatterometer on board of the METOP satellite. Besides handling ASCAT data the tool is also capable of handling scatterometer data from the ERS satellite, the predecessor of METOP. In this report the ocean calibration method is described and the results from ERS runs and error simulation are presented.. The calibration method is based on Fourier analysis of the data and has also been used by [STOFFELEN 1998] and [HERSCHBACH 2003]. The aim of ocean calibration is, by comparing the average measured backscatter from the antennae to the simulated backscatter from collocated NWP winds, to assess the absolute values of the measurements and the GMF and to show that there is no interbeam bias. The calibration software is used with existing ERS data and with simulated ASCAT data. The method will be applied for ASCAT as soon as real ASCAT data becomes available.. First the calibration is described from a theoretical point ...
SPIV self-calibration strongly depends on the accuracy of the detection of the projection of the control points. A new family of control points and an algorithm of image detection are proposed to overcome the bias associated to the use of dot centers as control points in SPIV self-calibration.
This dataset includes calibration data from the sensors onboard the U.S. Coast Guard Cutter Healy during the Bering Sea Ecosystem Study-Bering Sea Integrated Ecosystem Research Program (BEST-BSIERP) 2009 0902 (late spring) cruise. BEST-BSIERP together are the Bering Sea project. To find the individual sensor calibration sheet, use the sensors serial number. This dataset also includes information on the Science Sea Water ballast reservoir. The individual data files are collected into tar files. ...
Quality Testing Services provides comprehensive, Time/Frequency Calibration with state-of-the-art frequency calibration standards and highly trained metrologists. Unlike off-air frequency receivers, our Rubidium Atomic Clock has very-high, short-term stability that enables exceptional accuracy frequency calibration.. The next time your Time/Frequency test equipment needs calibration please contact us and we will give you the turnaround you need and the competitive price you want. We are here to serve your calibration needs whether at our calibration lab or on-site at your facility.. If there is something not on this list that you would like calibrated, please do not hesitate to ask, we may already do it or would like to start.. Please click the link below to request a quote or feel free to contact our Lab Manager, Heather Ryan, at 314-770-0607 or email at [email protected] ...
Digitally encrypted calibration certificates are electronic files that have an encrypted algorithm embedded and hidden within the file. If such files are altered a message is displayed within the document to warn the viewer.. Instron calibration laboratories only provide digitally encrypted calibration certificates. When we approve a calibration certificate we apply a digital signature. This looks like a normal signature. However, if the document were to be altered the signature block displays a warning message to indicate a change has taken place since the digital signing.. We believe that providing Calibration Certificates in a digitally encrypted format provides the customer with all the benefits and flexibility of electronic files with also the confidence in the integrity of such documentation. Many Calibration organizations may offer electronic/digital calibration certificates, but few offer digitally encrypted calibration certificates.. ...
Find out more about Lancaster Universitys research activities, view details of publications, outputs and awards and make contact with our researchers.
Disclosed herein are systems and methods for calibrating a continuous analyte sensor, such as a continuous glucose sensor. One such system utilizes one or more electrodes to measure an additional analyte. Such measurements may provide a baseline or sensitivity measurement for use in calibrating the sensor. Furthermore, baseline and/or sensitivity measurements may be used to trigger events such as digital filtering of data or suspending display of data.
A few words of warning are in order! First, all "calibration candidate" orbits are NOT of the same quality, however much we would like them to be! Before using a set of elements please examine the elements, figures, etc. carefully to check whether that orbit appears to be of proper scale and sufficient quality for your purposes. Also, using measurements of double stars to calibrate the measurement of other double stars is certainly circular (or, if you will, Keplerian). We strongly advocate the use of other absolute calibration techniques such as a slit mask (cf, McAlister et al. 1987, AJ, 93, 688; Hartkopf et al. 1997, AJ, 114, 1639; or Douglass et al. 1997, ApJS, 111, 289) or at least star trails (for east-west orientation) if at all possible. When double stars are necessary for scale calibration, the set provided should be adequate; however, the measures you determine will only be as accurate as the calibration systems you use. The use of these systems for identification of higher-order ...
The first version of the package plink has been uploaded to CRAN. plink is a package for conducting unidimensional IRT scaling and chain linking for multiple groups for single-format or mixed-format common items. The package supports eight IRT models and four calibration methods. Dichotomous Models: 1PL, 2PL, 3PL Polytomous Models: -Graded response model -Partial credit model -Generalized partial credit model -Nominal response model -Multiple-choice model Calibration Methods: -Mean/Mean -Mean/Sigma -Haebara -Stocking-Lord Any combination of dichotomous and polytomous items can be supplied with intermingled unique and common items for as many items and groups as system memory allows. Linking constants are computed and returned for all the calibration methods, and (if desired) ability and/or item parameters can be rescaled and returned using any of the estimated linking constants. Any of the included groups can be specified as the base scale, the characteristic curve methods can use symmetric or ...
Fluke Calibration produces the broadest range of electrical, RF, temperature, pressure & flow calibration instruments & software that help measurement professionals around the globe.
When it comes to home theater gear, many enthusiasts will spend lots of money to get the best TV and the best sound system. Often they never think about calibrating the colors of the TV to get the best image quality.. Find the best Cyber Monday Deals 2017. Datacolor has announced a new HDTV calibration tool called the Spyder3HDMI. The device connects to your TV using HDMI. The HDMI connectivity eliminates the need for a PC. The software needed for the calibration process is embedded directly into the TV for calibration.. The software walks the user through a step-by-step calibration process that maximizes the colors for the specific environment the TV is in. Exactly when the device will ship and how much it will cost is unknown ...
COX Instruments (www.cox-instruments.com), a supplier of flow measurement instrumentation, opened a primary standard flowmeter calibration center in Tokyo, Japan. Operated under an agreement with NTK International Corporation (www.ntkinternational.com), the lab is designed to provide primary standard NIST-traceable liquid calibrations for all types of flow measurement devices, ranging from 0.01 to 300 GPM in fluids from 0.5 to 100 centistokes.. Common flowmeters calibrated at the new calibration center include:. turbine, positive displacement, Venturi/nozzle, rotameter, orifice-plate, Coriolis, ultrasonic, vortex and variable area. The facility offers liquid flowmeter calibration services for end-users and OEM production.. The calibration center verifies flowmeter accuracy by comparing the meter-under-test with a primary flow standard traceable to a recognized international standard, such as the U.S. National Institute of Standards and Technology (NIST, www.nist.gov). The calibration service ...
Humidity meters and indicators with separate probes are calibrated as a system for greatest accuracy. We offer two humidity calibration certificates. Certificate 17030-10, states the actual test points, instrument readings at test points, and correction values after calibration. Certificate 17030-20 offers the same test data as 17030-10, and also includes instrument readings before and after calibration. Select certificate 17030-20 in critical applications to monitor out of tolerance conditions. Calibrations are performed in a humidity- and temperature-controlled chamber at 30%, 60%, and 90% humidity; 86°F (30°C). Four probes provide NIST-traceable calibration in the chamber for the instrument under test. These probes monitor humidity and temperature uniformity to ensure readings at stable conditions. Our chamber calibrates hygrothermographs, digital humidity meters, and humidity indicators. For NIST-traceable calibration, your probe and instrument must be returned or ordered together. ...
During his internship at Willow Garage, Pablo Speciale a masters student from Vibot worked on allowing robots to better perceive their environment by improving calibration across multiple RGB cameras. Proper calibration allows robots to accurately interact with their environment by combining measurements from different cameras in an optimization process. In this method, calibration is obtained by minimizing the reprojection error with a non-linear solver (in our case, Ceres Solver). The approach starts off with the assumption that one camera is already calibrated with respect to the robot. Next, an initial calibration from the robot model is taken. This solution is able to estimate the best relative position between cameras by taking measurements of 2D patterns, in our case, a checkerboard thats held by the PR2. By using this process, proper calibration is achieved when all points move as a rigid entity during movement of the robot and its joints.. The goal of this project was the creation of a ...
With our calibration services you can feel safe that your instruments always perform as expected. We offer complete calibration services for various measuring instruments.. Intertek has years of experience in qualified calibration management of various measuring instruments. By using Intertek you dont have to invest in expensive calibration instruments and technical skills. You will also benefit from time and resource savings on the registration and administration process.. Our flexible and responsive calibration service for electronic test and measurement instruments means that you do not need to invest in expensive calibration instruments with the benefit of time and resource savings on registration and administration processes.. We can calibrate a range of measurement instruments including multimeters, oscilloscopes, power supplies, tachometers, and many others . Our comprehensive certification and calibration services ensure that your products meet all relevant regulations, and compliance ...
Downloadable! In this paper we propose a Libor model with a high-dimensional specially structured system of driving CIR volatility processes. A stable calibration procedure which takes into account a given local correlation structure is presented. The calibration algorithm is FFT based, so fast and easy to implement.
The power output of fusion experiments and fusion reactor-like devices is measured in terms of the neutron emission rates which relate directly to the fusion yield rate. Determination of such parameters requires a set of absolutely calibrated neutron detectors. At JET, the Fission Chamber neutron detectors were originally calibrated some 20 years ago by performing a set of in-situ calibrations using neutron sources and the absolute calibration has been maintained since then by cross calibrations against Activation System measurements. After this elapsed time and a succession of changes to the internal and external JET structures, the JET neutron yield calibration needs re-measurement. The purpose of this paper is to give an overview of the arrangements being developed to allow a new calibration to be made.. A new, more detailed, calibration is being provided by means of an engineering programme of development of the robotic tools which will allow safe and accurate deployment of a strong Cf-252 ...
The Epic Motorsports Engine Calibration Interface (ECI) was developed as a means to give BMW enthusiasts more control over their BMWs engine performance. With this specially designed ECI tool, you have the ability to install the full range of Epic performance software calibrations and/or return the vehicle to its factory calibration settings. The ECI also doubles as an OBD II scanner capable of reading and clearing DTCs (Diagnostic Trouble Codes). Your unique ECI tool plugs into your vehicles OBD II port and into the USB port of your PC. With the user-friendly Epic Engine Calibration Interface PC software, you can read the existing factory (or aftermarket) programming from your vehicles ECU. After purchase of an Epic tune you can upload your tune to Epic for an upgrade to one of the various Epic Motorsports calibrations optimized for the specific vehicle. You will then load your modified calibration file into the ECU using the same ECI tool.. You now have complete control of the calibration ...
The intraoperative calibration of an arbitrary surgical instrument relative to a surgical navigation digitizing system is achieved by a calibration guide. The calibration guide is established in position and orientation relative to the digitizing system coordinate system. The surgical instrument is aligned to the calibration guide during calibration to establish its probe and end orientation in the digitizer coordinates. The instrument carries a marker structure which is trackable in the digitizer coordinates to enable tracking by rigid-body transformation of the instruments probe and end position after calibration in the calibration guide.
Laboratory accredited testing and calibration of the following topics : • Gauge length (micrometers, calibers, laser gauges) • Calibration of pressure and sub-pressure gauges • Torque calibration • Accelerometers calibration • Temperature & humid chambers calibration • Electronic equipments calibration • Mass , balance & power gauges calibration ...
Calibration tubes are used for rehabilitation of non-accessible sewer lines. Calibration tube is also known as cal tube, calibration hose and balloon. The Calibration tube is a non-extensible and reinforced tube. Primarily, the tube is used to keep the liner inflated until cured, once cured, the tube discarded. By placing the tube in the manhole during the relining process, liner expansion can be avoided. The Calibration tube is inserted till a non-accessible point during the double liner method. Firstly a liner (not closed at both ends) is inserted and positioned in the sewer. Then the Calibration tube (closed at one end) is inserted into the liner and inflated so the liner gets fixed to the pipe tightly. This method for relining is useful in cases where house connections are not accessible via a manhole. In case of tube failure, some safety measures are to be taken. Used tubes can also be put to use. They can be used as guide tubes and pre-liners. The calibration tube can be used for several ...
In order to take a scientific measurement with a microphone, its precise sensitivity must be known (in volts per pascal). Since this may change over the lifetime of the device, it is necessary to regularly calibrate measurement microphones. This service is offered by some microphone manufacturers and by independent testing laboratories. Microphone calibration by certified laboratories should ultimately be traceable to primary standards a (National) Measurement Institute that is a signatory to International Laboratory Accreditation Cooperation. These could include the National Physical Laboratory in the UK, PTB in Germany, NIST in the USA and the National Measurement Institute, Australia, where the reciprocity calibration (see below) is the internationally recognised means of realising the primary standard. Laboratory standard microphones calibrated using this method are used in-turn to calibrate other microphones using comparison calibration techniques (secondary calibration), referencing the ...
The calibration process can be significantly streamlined by optimizing periodic calibration schedules, synchronizing instrument data in the calibration management system and using documenting calibrators. Paperless documentation allows technicians to access the required information and upload calibration results from any location, at any time. Further, it eliminates the necessity for administrative technicians and staff to manually fill out the data which usually takes a lot of hours. Needless to say, paperless calibration is faster, efficient and streamlined ...
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A method for calibrating a first image processing apparatus at a first location with a control image processing apparatus at a second location. The method comprises obtaining a plurality of individual exposure levels and plotting them against time creating a deviation history and comparing it to the operating specification for the control image processing apparatus. If the deviation history is within the operating specification, initiate a calibration, if not adjust the exposure levels and then initiate calibration. The calibration comprises preparing a calibration curve of exposure level versus density for a plurality of shipped thermal donors; computing an exposure modification curve by comparing a control thermal receiver to the shipped thermal receivers; transmitting the calibration and then the exposure modification curve to the first image processing apparatus; and adjusting the first image processing apparatus exposure levels to conform to the calibration curve and the exposure modification
Guillermo at Special CNC Tactics "Gage Management Softwares employees are awesome. Over the years we had various calibration technicians haphazardly insert gages to check out this site our outdated calibration method. It was a large number-there was Unquestionably no continuity. We couldnt explain to wherever our gages have been Situated or when they ended up due for calibration. Gage Management cleaned up our data for us and vastly improved its accuracy. Gage Regulate immediately built the calibration process quicker and less complicated. If we realized how straightforward the software was much too use, we wouldnt have waited so lengthy." - Jeffery at Peltier Aerospace "Networking the software will save me plenty of time! The Deep Blue inquiry display lets our estimators and store flooring employees to entry gage availability and site facts without the need of calling me multiple moments each day" - Thomas at Mayer Manufacturing Just send out us an electronic mail at: ...
Laser induced breakdown spectroscopy (LIBS) is a potential technique for rapid analysis of samples present in solids, gases and liquids. In the last two decades it was an object of extensive studies. Controlled calibration method used to analysis the LIBS spectra is investigated. Compared with the inner calibration and calibration-free (CF) methods, this new method overcomes "matrix effect", and demonstrates a better ability to cope with the spectra. It is used to analyze natural soil, and errors of the concentration are decreased about 5%. The result shows that the new method is feasible and accurate.. © 2008 Chinese Optics Letters. PDF Article ...
Self-report instruments have been used in many epidemiology studies and have contributed to most of what is known regarding the relationship between physical activity and health [40]. Although objective instruments are now widely used, there is considerable need to improve the utility and accuracy of self-report measures. The low cost and ease of use make self-report measures the most feasible approach for assessing physical activity profiles in large and diverse groups of individuals [40]. The calibration procedures tested in this study provide a way to scale self-report data so it matches data obtained using objective measures. In this study, we calibrated the PAQ (a widely used self-report instrument in research with children) but the methods would have similar utility for other self-report instruments. The specific goal was to evaluate the validity of a simple calibration equation to convert raw PAQ scores into a more meaningful outcome measure (minutes of MVPA per week) and determine if ...
The working standard calibration certificate supplied with your product provides valuable product information. You cannot find the working standard calibra
Calibration of metal oxide (MOX) gas sensor for continuous monitoring is a complex problem due to the highly dynamic characteristics of the gas sensor signal when exposed to natural environment (Open Sampling System - OSS). This work presents a probabilistic approach to the calibration of a MOX gas sensor based on Gaussian Processes (GP). The proposed approach estimates for every sensor measurement a probability distribution of the gas concentration. This enables the calculation of confidence intervals for the predicted concentrations. This is particularly important since exact calibration is hard to obtain due to the chaotic nature that dominates gas dispersal. The proposed approach has been tested with an experimental setup where an array of MOX sensors and a Photo Ionization Detector (PID) are placed downwind w.r.t. the gas source. The PID is used to obtain ground truth concentration. Comparison with standard calibration methods demonstrates the advantage of the proposed approach.. ...
Hello All,. Ive just recently acquired a Moog Theremini, and Im trying to navigate my way around calibration and setting everything up. I know the Theremini is often met with sighs of contempt, but Im really enjoying it so far!. However, I am having problems with calibrating the pitch antenna. Ive seen this issue raised so many times, both on here and the Moog support forum, but I cant find any responses for my problem. I understand how to do the calibration process, and how to set the pitch range of the instrument. Ive currently got it set on a 4 octave range. The unit itself is set up on a microphone stand, as per recommendations, so no chance of interference from hidden metal in a table or anything.. When I do the calibration process, I cant seem to find zero beat. The theremin will say that its calibrated for 4 octaves (according to the settings), but it wont play the whole range, Ill only get maybe 2 octaves from my chest to the pitch antenna. The rest seem to be several feet ...
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... Inc., specializes in MPCA calibrations of flow meters. With each calibration, a Calibration Certificate and label are provided. We use NIST traceable test equipment to perform all calibrations/verifications. We also provide calibrations of various other instruments including, but not limited to pH, pressure, open channel flow meters, conductivity, magnetic flow meters, and chart recorders ...
|p|Benzodiazepines/HR Plasma Calibration Standard, lyophilised|/p| |p|This lyophilised calibrator from Chromsystems is based on human plasma and should be used according to the instruction manual. It is designed to calibrate the measurement method in cli
Camera calibration is a crucial problem in many applications, such as 3D reconstruction, structure from motion, object tracking and face alignment. Numerous methods have been proposed to solve the above problem with good performance in the last few decades. However, few methods are targeted at joint calibration of multi-sensors (more than four devices), which normally is a practical issue in the real-time systems. In this paper, we propose a novel method and a corresponding workflow framework to simultaneously calibrate relative poses of a Kinect and three external cameras. By optimizing the final cost function and adding corresponding weights to the external cameras in different locations, an effective joint calibration of multiple devices is constructed. Furthermore, the method is tested in a practical platform, and experiment results show that the proposed joint calibration method can achieve a satisfactory performance in a project real-time system and its accuracy is higher than the manufacturers
A modulation transfer function (MTF) calibration method based on binary pseudo-random (BPR) gratings and arrays [Proc. SPIE 7077-7 (2007), Opt. Eng. 47, 073602 (2008)] has been proven to be an effective MTF calibration method for a number of interferometric microscopes and a scatterometer [Nucl. Instr. and Meth. A616, 172 (2010)]. Here we report on a further expansion of the application range of the method. We describe the MTF calibration of a 6 inch phase shifting Fizeau interferometer. Beyond providing a direct measurement of the interferometers MTF, tests with a BPR array surface have revealed an asymmetry in the instruments data processing algorithm that fundamentally limits its bandwidth. Moreover, the tests have illustrated the effects of the instruments detrending and filtering procedures on power spectral density measurements. The details of the development of a BPR test sample suitable for calibration of scanning and transmission electron microscopes are also presented. Such a test sample is
In the near future, calibration changes will be made that will affect the Thermal Infrared Sensor (TIRS) Band 10 and all of the Operational Land Imager (OLI) bands onboard Landsat 8.. The calibration for TIRS Band 10 will be lowered by a constant 0.32 W/(m2 sr µm) for every TIRS Band 10 pixel. This adjustment is being made due to significant discrepancies as compared to surface water temperature measurements. Studies are ongoing to better characterize the source of the calibration errors, and if possible, provide a more accurate scene-dependent correction. No adjustment will be made to TIRS Band 11, as indications are that its calibration is further off and more variable. Until indicated otherwise, users should work with TIRS Band 10 data as a single spectral band (like Landsat 7 Enhanced Thematic Mapper Plus (ETM+)) and should not attempt a split-window correction using both TIRS Bands 10 and 11.. Prior to this reprocessing effort, users can subtract 0.32 W/(m2 sr µm) from the TIRS Band 10 ...
GlobalSpec Product Announcement for Calibration Types for Vector Network Analyzers - Calibrating VNAs is an important step in making accurate measurements with vector network analyzers. CMT Senior RF Design Engineer Brian Walker conducted a webinar about the different types of calibration for network analyzers. The types of calibration that were covered were: SOLT/SOLR Calibration TRL Calibration Waveguide Calibration
And remember- gas detectors and gas monitors are only as good as the calibration gas used to calibrate them. But an incorrectly calibrated gas detector or gas monitor isnt worth much at all.. Thats why we offer these videos on how to calibrate your gas detectors and gas monitors with calibration gas. Theyre prepared by James Moore of Ideal Calibrations, LLC.. And anyone involved in the calibration of gas detectors should be sure to read Bulletin SHIB 05-04-2004 from the Department of Labor titled Verification Of Calibration for Direct-Reading Portable Gas Monitors.. ...
LGC Biosearch Technologies offers CAL Fluor® and Quasar® dyes that span a wide range of emission wavelengths, for maximum flexibility in experimental design. Dye calibration standards are formulated with the fluorophore covalently attached to an oligo-dT (10-mer), to better mimic the signal from a fluorescent probe.
A calibration method comprising generating a pattern with an array of individually controllable elements, providing a substrate table with a radiation sensor, using radiation to generate an image of the pattern at the substrate table, moving at least one of the generated pattern and the substrate table relative to each other in order to move the image relative to the sensor, detecting radiation intensity with the sensor, and calculating a calibration establishing a relationship between coordinates of the coordinate system of the array of individually controllable elements and coordinates of the coordinate system of the substrate table, based on the detected intensity and the positions of the array of individually controllable elements and the substrate table.
This page is specific to the pypilot_calibration script. First see the [[calibration]] guide. To access the calibration either click on the calibration button on the openplotter pypilot tab, or run pypilot_calibration ,hostname, from a console. The mpu9255/mpu9250 (these are on the moitessier hat) are usually factory calibrated for the accelerometer. If you have mpu9255 sensors with orange capacitor (not yellow) they require this calibration as well as most other sensors. Inspect the accelerometers, and ensure they fall on the rendered sphere in all orientations. If they do not, you will need to hold them on each of 6 sides (of a box) very still for a few seconds. Repeat this process until the calibration locks into place. Next, the sensors must be aligned to the boat. Once they are mounted and fixed to the boat, and the boat is level in the water, from the IMU tab, you can press the level button. Now the boat should be rendered upright. Finally, you should complete a circle in the boat to ...
Multi-element Calibration Standard 3, Matrix per Volume: 5% HNO3 per 125 mL, Concentration of Element: 10mg/mL Silver, 10mg/mL Aluminium, 10mg/mL Arsenic, 10mg/mL Barium, 10mg/mL Beryllium, 10mg/mL Bismuth, 10mg/mL Calcium, 10mg/mL Cadmium, 10mg/mL Cobalt, 10mg/mL Chromium, 10mg/mL Cesium, 10mg/mL Copper, 10mg/mL Iron, 10mg/mL Gallium, 10mg/mL Mercury, 10mg/mL Indium, 10mg/mL Potassium, 10mg/mL Lithium, 10mg/mL Magnesium, 10mg/mL Manganese, 10mg/mL Sodium, 10mg/mL Nickel, 10mg/mL Lead, 10mg/mL Rubidium, 10mg/mL Selenium, 10mg/mL Strontium, 10mg/mL Thallium, 10mg/mL Vanadium, 10mg/mL Uranium, and 10mg/mL Zinc. Mercury is supplied as a separate solution due to incompatibility with other elements.
Calibration standards for spectrophotometers are available for all equipment supplied by Spectronic-Camspec They are traceable to national standards
Instrument Calibration Standard 2: 100mL - N9301721. We offer a variety of environmental analysis standards for all your environmental application needs.
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ASI Standards, formerly Analytical Services, Inc. is a worldwide trusted source for calibration standards serving the petroleum, lube oil, crude oil and
This paper presents a novel iterative calibration algorithm for tri-axial magnetometers. The proposed algorithm estimates and compensates the effects of deterministic interference parameters using only nine distinct measurements. The simulation results confirm that the proposed method outperforms the conventional ellipsoid fitting based models in terms of both accuracy and reliability even with the presence of a moderate wideband noise. The algorithm also achieves fast convergence , which makes it suitable for real-time applications. ...
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Calibration solution for Truncheon, Guardian (conductivity), and ppm/EC pen.. 2.77 EC = 1350 TDS/ppm (500 scale) = 1890 ppm (700 ppm). Bluelabs EC/CF equipment does not need calibrating as they are all factory calibrated at Bluelab. The CF27.7 (EC2.77) solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/CF probe.. Calibration Solutions should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. They should be stored with the lids securely tightened. Not replacing the lid after use will result in evaporation which causes the salt content in the solution to rise decreasing the validity of the solution.. Contamination between solutions can easily occur, which will affect the validity of the calibration. Bluelab recommend that the solutions are de-cantered into a smaller vessel and the contents discarded when the calibration process has been completed. ...