Data Logger Test & Calibration

A2LA Accredited Temperature & Relative Humidity Calibration

We provide test, calibration and certification services for all our Spectrum and VL-series data loggers that meet the demanding calibration requirements of the FDA, ISO 9000, and other recognized quality assurance systems. Computer assisted procedures ensure that all our instruments conform to required specifications.

Our temperature and humidity calibration lab is accredited with A2LA for ISO/IEC 17025 and ANSI/NCSL Z540-1-1994 standards.

Relative Humidity Calibration & Test Facilities

Withnell Instruments is equipped to perform routine RH and temperature calibrations accurately, quickly and economically. Calibrations are performed in a specially insulated and precision temperature-controlled RH environmental chamber designed for uniform air circulation and temperature and humidity stability.

We use a Thunder Scientific Model 2500 "Two Pressure" Humidity Generator with a rated NIST-traceable RH accuracy of +/-0.5% RH over a range of 10% to 98% RH and 0 to 70° C. The chamber can be programmed for any RH or temperature point within the rated ranges. Typical calibration profiles are programmed at 11%, 45% and 80% RH at 25° C.

In addition to the use of the Thunder Scientific chamber, we employ a completely independent system (an RH Systems/MBW Calibration Model 373 Dew Point Mirror) to verify results and provide the highest possible level of assurance that calibration results are correct.

Recommended Calibration Intervals

We recommend annual instrument calibration of Veriteq data loggers, at a minimum, to verify proper function, quality, and measurement accuracy.

Sample Temperature & Humidity Calibration Certificate

 (Adobe PDF / 28k)
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