Kaye ValProbe RT, Руководство пользователя

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Chapter 10: Sensor Verification
Kaye ValProbe RT User Manual 88
Sensor Verification
10.1. Introduction and Overview
With the ValProbe RT system, you can verify sensors at up to six different temperature
setpoints for Pressure/Temperature Loggers, each sensor type must be verified
independently.
The ValProbe RT uses the parameters defined in your Verification setup to perform sensor
verification. Verification parameters specify the temperature reference setpoints at which
Verification is performed, and the stability and deviation criteria for the temperature sensors
and the temperature standard. Verification requires the use of a Kaye IRTD as the
temperature standard. The IRTD’s measurement accuracy is 0.025ºC, with a range of –196ºC
to 420ºC. The software requires a Temperature bath able to simulate the verification
temperatures. If a Kaye bath is used, the system can perform automatic Verification in which
the bath temperatures are automatically controlled. A manual Verification can be performed for
non-Kaye baths. The bath used should have adequate stability and uniformity to meet your
needs (see Section 10.1.2).
Principle of Operation
When you start the Verification, the ValProbe RT loggers begins to collect data every ten
seconds to its internal memory for the duration of all defined setpoints. At the same time,
measurements from the IRTD are collected every ten seconds by the Base Station. The Base
Station uses the IRTD data, along with the specified criteria, to display and determine stability
at each setpoint. At the conclusion of the Verification, the data from Loggers are read and the
system calculates based on the Loggers and IRTD data, whether the Loggers have met the
defined stability and deviation criteria. The ValProbe RT system generates a verification report
for each sensor and setpoint – which is stored as a PDF file for Verification documentation
printing.
When Verification is complete, the ValProbe RT system writes the Verification date into the
Logger and stores each Logger’s report file into the Console under the corresponding
equipment tile by Logger serial number.
Along with the date of the last Verification, the Logger also contains the Factory Calibration
date, including calibration offsets, in the Logger in non-volatile memory. This data remains
intact even if the battery is depleted or exchanged.