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Topic: Calibration

In the News (Fri 19 Apr 19)

  Monitor Calibration and Profiling
Calibrating and profiling your monitor should, therefore, be your first priority.
The primary problem is that your basic eyeball calibration is highly influenced by ambient lighting, how much sleep you've had, and how much coffee is coursing through your veins.
This is particularly important if you are performing calibration by eye.
www.drycreekphoto.com /Learn/monitor_calibration.htm   (1262 words)

 Monitor calibration and gamma
Unless you have a calibrator you'll have to trust your eyes: White and gray images (where R = G = B) should appear tonally neutral, i.e., they should have no visible tint.
The left portion, which consists of my gamma chart, is used to calibrate gamma and to adjust fl level, which interacts with gamma.
The ICC monitor profiles are used by their respective loader programs to calibrate the monitor.
www.normankoren.com /makingfineprints1A.html   (5341 words)

 Gage Calibration
Using independent or original equipment manufacturers' calibration services can be costly, depending upon the number and types of gages that must be calibrated, and the turnaround time is often in the three-week to six-week range.
Calibration procedures can be developed by working directly with the original equipment manufacturer; generated from information available from the U.S. government, national or international standards bodies; or developed by in-house personnel.
Whenever an instrument is calibrated, that calibration data should be compared with the historical data to determine if the calibration interval should be shortened or lengthened.
www.qualitydigest.com /feb97/gagecal.html   (1393 words)

 Verification Of Calibration for Direct-Reading Portable Gas Monitors
Calibration at locations where the equipment is to be used is always preferable.
Correctly calibrating an instrument helps to ensure that the instrument will accurately respond to the gases that it is designed to detect, warning users of hazardous conditions before they reach dangerous levels.
A full calibration is the adjustment of the instrument’s reading to coincide with a known concentration (generally a certified standard) of test gas.
www.osha.gov /dts/shib/shib050404.html   (1763 words)

 Calibration   (Site not responding. Last check: 2007-11-05)
In that case, you need to calibrate from the GUI since it is not possible to tell which of the devices is to be calibrated when the Windows Game Controllers Applet Calibration is used.
Calibration from within the GUI causes the Control Manager to scan the system for any new CH devices and to update them so they appear in the device list.
Calibration from the Game Controllers applet is essentially the same with the exceptions noted at the beginning of this section.
home.att.net /~stickworks/calibration.htm   (1940 words)

 ESA - Living Planet Programme - GOCE - GOCE data calibration
In fact, the biggest difficulty with pre-flight calibration is that the 1 g environment on Earth prevents a proper calibration of the accelerometers since they are designed to operate with the highest accuracy in a 0 g environment.
The internal calibration is sometimes referred to as 'relative' calibration, since the ratio of the sum and the difference of the accelerometer scale factors is determined.
External calibration aims to establish that the gradient observations really represent the gradients of the gravity field in Eötvös Units, that remaining unresolved errors are corrected for and that the observations are obtained with the required (or in any case with a known) accuracy.
www.esa.int /esaLP/ESAPQO1VMOC_LPgoce_0.html   (825 words)

 HygroLog - calibration
When humidity calibration is done using the ROTRONIC humidity standards, HW3 automatically corrects the value of the standard to reflect the temperature of calibration (see note).
Calibration Devices: a calibration device is a small airtight container that fits on the probe and seals around the humidity sensor.
During calibration, a known reference humidity is produced inside the calibration device by means of a humidity standard.
www.rotronic-usa.com /v2/products/log/hylog/hylog_calibration.htm   (290 words)

Calibration is required by national and international standards and most require that a system of periodic calibration and maintenance must exist for any facility doing nondestructive testing.
I do not mean this form of calibration but instead refer to a periodic and more thorough check on the instrumentation performance, usually with the express purpose of assuring that the accuracy and precision specifications of the measuring instrument are met.
My conclusions are that failure to calibrate and maintain NDT equipment represents a safety risk and a risk to the integrity and credibility of those institutions that choose to ignore this requirement.
www.xdcr.com /calibration.html   (1423 words)

 Michigan Instruments, Inc. :: Calibration Info
Calibration procedures include setting of the compliance and resistance characteristics of the lungs and setting offset and gain characteristics for each of the pressure transducer channels.
It is these calibration tables that the volume calculation algorithms described in the previous section use to determine the coefficients to use for the real time solution of the dynamic equations.
To reduce the potential for an inaccurate reading due to the passage of time or extended use, a recalibration is recommended for your instrument every 2 years for Models 3600i, 5600i and 5601i and every 3 years for models 4600, 1600 and 1601.
www.michiganinstruments.com /support-calibration.htm   (371 words)

 Calibration - Taylor Hobson - Calibration
As well as calibrating the reference standards that are to be sent to customers with a new instrument, we also offer calibration of used items.
By using exclusive measuring techniques, the UKAS (NAMAS) laboratory calibrates the hemisphere to a resolution of 1 nanometre, with an uncertainty of measurement of 5 nanometres.
The ball may be used to calibrate the instrument, or as a "confidence gauge", to ensure its accuracy is maintained.
www.taylor-hobson.com /calibration.html   (593 words)

 calibrater - Module   (Site not responding. Last check: 2007-11-05)
The primary purpose of this module is to solve for calibration components, and to optionally apply these corrections to the observed data.
The calibration module is designed to be used in conjunction with the imager module which provides support for synthesis imaging.
The measurement equation is designed to model calibration effects for a generic radio telescope and the calibration and synthesis modules are, in general, not instrument specific.
aips2.nrao.edu /docs/user/SynthesisRef/node21.html   (596 words)

 Calibration Method for Sprayers and Other Liquid Applicators
Calibrate with clean water when applying toxic pesticides mixed with large volumes of water.
Measure and mark calibration distance in a typical portion of the field to be sprayed.
To determine amount of pesticide to put into a sprayer or applicator tank, divide the total number of gallons of mixture to be made (tank capacity for a full tank) by the gallons per acre rate from Step 7 and use recommended amount of pesticide for this number of acres.
pubs.caes.uga.edu /caespubs/pubcd/C683.htm   (1216 words)

 CPU Internal Diode Calibration
There is a simple procedure for calibrating the internal diode on your motherboard---assuming you are lucky enough to have one of the motherboards capable of reading the diode---so that the CPU temperatures you see are the actual internal CPU temperatures.
The basis of this calibration is that a change in the speed of the CPU will cause a proportional change in the heat output of the CPU.
While this "practical" calibration of the CPU diode/motherboard combination is probably not as accurate as one done to exacting laboratory standards and is subject to the limitations inherent in the full degree temperature steps, testing with a variety of CPUs, motherboards and heatsinks has proven the procedure to be viable.
www.arcticsilver.com /diode_calibration.htm   (1480 words)

 Sheldon Brown's Cyclecomputer Calibration Chart
Most manufacturers use the same calibration formula for all models, so if your make is listed, but not your model, try the formula listed for other models of the same brand.
If your computer model name is highlighted on its calibration chart, that is a link to the Calibration Procedure Instructions Page entry that applies to that model.
The calibration charts are to a large extent based on instruction sheets provided with various cyclecomputers.
www.sheldonbrown.com /cyclecomputer-calibration.html   (989 words)

 Camera Calibration
The proper exposure for calibration should be based on correct camera settings, not exposure adjustments in the ACR settings.
The basic objective is to balance six slider settings to calibrate hue and saturation in the red, green, and blue patches.
Since the calibrate tab has sliders for hue and saturation only, it is useful to be able to convert RGB to HSB.
www.rags-int-inc.com /PhotoTechStuff/AcrCalibration   (3185 words)

 Review: Common Home Calibration Discs
Calibration is, quite simply, changing the settings on your audio or video equipment in order to maximize the quality of that device's output.
Calibration cannot be done without a little help which can come either in the form of a professional technician, or a do-it-yourself calibration disc.
These explanations, covering everything from MPEG compression in DVDs to how HD signals are broadcast, may be confusing for the beginning home theater user, as they utilize a lot of technical jargon and are accompanied by diagrams on-screen that serve no purpose and are not referenced in the narration.
www.projectorcentral.com /calibration_disc_review.htm   (2071 words)

 Calibration Services -- Clean Air Equipment
The accurate calibration of measuring equipment for air quality management is as important as performing the test itself.
We suggest either geometric or wind tunnel calibration of all sample probes before and after testing, after possible damage to the probe assembly, or after cleaning a probe-end with an abrasive cleaner.
Calibration Gas Audits (CGA) -- Quarterly audits testing the precision and accuracy of CEM analyzers with a comparison to and EPA Protocol Calibration Gas standard.
www.cleanair.com /Equipment/Calibration/calibrate.html   (872 words)

 Calibration lab capabilities of Calibrationlabs.com
This allows for the precise calibration of standard liquid flow meters as well as high pressure venturies, orifices, and other critical devices.
Calibration accuracy as tight as 0.05°C may be performed.
Calibrations may be performed using air, nitrogen, helium, or custom non-explosive/nontoxic gases.
www.calibrationlabs.com /capabilities.htm   (477 words)

 Calibration Services
Calibration through your DVD player is achieved with the aide of the Avia, Digital Video Essentials and Sound and Vision DVDs.
Calibrate grayscale color (white balance) to the NTSC broadcast industry standard white reference, D65 (6500 Kelvin) using the Sencore CP5000 Color Analyzer.
It is require that the projector be properly installed before calibration, which means it needs to be positioned correctly with respect to the screen and securely mounted whether on the floor or the ceiling.
mysite.verizon.net /resp4oz4/services.html   (515 words)

 DEQ - Model Calibration   (Site not responding. Last check: 2007-11-05)
Model calibration consists of changing values of model input parameters in an attempt to match field conditions within some acceptable criteria.
Lack of proper site characterization may result in a model that is calibrated to a set of conditions which are not representative of actual field conditions.
This process, referred to as "over calibration", results in a model that appears to be calibrated but has been based on a dataset that is not supported by field data.
www.michigan.gov /deq/0,1607,7-135-3313_21698-55863--,00.html   (484 words)

 5.20 Calibration Program
Calibration surcharges are unique to the Calibration Program and are applied to the division fee (labor, leave, IDC, benefits, overheads, other objects, and contingency) of both fixed-fee and at-cost calibration services in determining the total fee.
Calibration services are performed on instruments that are metrologically suitable as reference or transfer standards and are designed to help the manufacturers and users of precision instruments achieve the highest possible levels of measurement quality and productivity.
Report of Calibration and Report of Test document the results of calibrations or tests performed by NIST and apply only to the specific instrument or standard at the time the measurements were performed unless otherwise clearly stated.
www.nist.gov /admin/mo/adman/520.htm   (5429 words)

 CMPS03 calibration documentation
It is necessary to rotate the compass very slowly during calibration to avoid missing the required compass points and to keep it horizontal to ensure the calibration figures are accurate.
It is necessary to rotate the compass slowly during calibration to avoid missing the required compass points and to keep it horizontal to ensure the calibration figures are accurate.
To calibrate the compass you only have to take the calibrate pin low and then high again for each of the four major compass points North, East, South and West.
www.robot-electronics.co.uk /htm/cmps_cal.shtml   (802 words)

 MODIS Calibration Discipline Group - Home Page
The Spectroradiometric Calibration Assembly (or SRCA) is a light source that emits wavelengths of light at known intensities, which allows further testing and calibration of the system.
To calibrate its thermal bands, MODIS will view a device called a flbody, which is designed to be non-reflective (hence fl) and kept at a precise temperature.
This calibration will be used to very precisely determine the temperatures of the Earth's surface and clouds, as illustrated by this graphic.
modis.gsfc.nasa.gov /MODIS/CAL   (1512 words)

 BaBar Online Calibration
The Online Calibration effort is primarily focused on the category of calibrations to be performed under dedicated running conditions with controlled stimuli provided to detector subsystems.
These calibrations will be carried out in a combination of the DataFlow and Online Event Processing (OEP) subsystems of the online.
Calibration will be a periodic focus of these meetings, and will in particular be the topic of the first one.
www.slac.stanford.edu /BFROOT/www/Computing/Online/Calibration/OnlineCalibration.html   (438 words)

 SCALE CALIBRATION scalecalibration.com Central Carolina Scale Industrial Service
Calibration of a scale is a procedure in which a certified scale technician uses known weight certified by the State of North Carolina Bureau of Weights and Measures, to adjust the response of a mechanical or electronic weighing system to the following tests; The indicator must show zero when there is no weight on scale.
All scales ideally need to be calibrated when first placed into service to insure accurate operation.
Wear of mechanical components, age and degree of use, all contribute to calibration drift.
calibration.centralcarolinascale.com   (652 words)

 AWH: How to Calibrate a Television FAQ
Calibration is for the most part directed at the Home Theater enthusiasts who want to get the full potential that their television sets can offer.
Calibration is not actually all that difficult to perform, but it can be quite technical in nature.
A new television should be broke-in before calibration to minimize any effects from the electronic components aging - use the TV in a normal manner, 4 to 5 hours a day for at least a week.
myweb.accessus.net /~090/how2adj.html   (9180 words)

 Brüel & Kjær Sound & Vibration
Calibration is a critical part of any measurement program.
Calibrating equipment on a regular basis ensures that the measurements you make are accurate and reliable.
Field calibrators, primary transducers, full calibration systems, and a fully accredited service center are all ways that Bruel & Kjaer can help.
www.bkhome.com /bk_template1.asp?spid=182&ctid=90   (139 words)

Calibration is the act of referencing one's experimental measurements to an external standard.
It usually entails analyzing samples of known composition (sometimes called "standards") and verifying that these measured values are consistent with those obtained previously.
The calibration process is often considered dull or tedious, but it doesn't have to be....
faculty.washington.edu /crowther/Misc/Songs/calibr8.shtml   (155 words)

 Temperature Sensor Calibration Resources - National Custodians of Temperature Measurement Standards and links to ...
Calibration is a broad topic and includes the untimate reference sources, such as the national metrology laboratories, who are the custodians of the International Temperature Scale, and those services that are directly traceable to the the national standards.
This is the scale which the national labs, or those affiliated to those labs, refer to in the calibration certificates of reference devices that may be used in corporate or university or other measurement laboratories which provide a more local service such as to working instruments in a process plant or experimental apparatus.
Temperature calibration services for TCs, RTDs, LiGs traceable to NIST to 1100 °C and with their custom-made fixed point cells (FPs Hg,Ga, In, Sn, Zn, Al, Ag).
www.temperatures.com /calb.html   (1003 words)

 Display Calibration - DisplayCalibration.com - Calibrate your computer display or monitor online for optimal viewing. ...
Calibrate your computer display or monitor online for optimal viewing.
Before you begin the calibration process, allow your display the opportunity to "warm up" and stabilize.
You should begin the calibration process with the "Brightness And Contrast" page as these are the most important display settings and will impact all additional adjustments.
www.displaycalibration.com   (497 words)

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