Temperature Measurement; Sensor Head Humidity; Sensor Verification - Vaisala PR-23 Series User Manual

PR-23 Series User Guide
The slope display also has a soft key SENSOR RESTART which can be used to restart the
current sensor (see upper left corner of the display for sensor letter) after a sensor
software update.
6.4.4 Temperature measurement
The system contains three different temperature measurements displayed to the left of the
optical image graphs:
TEMP is the process temperature used for automatic temperature compensation in the
Indicating transmitter.
HD TMP measures the temperature on the Sensor processor card PR-10100.
DTR TMP measures the temperature on the Motherboard of the Indicating transmitter.
Both sensor head temperature and DTR temperature are monitored by the built-in
diagnostics program.
6.4.5 Sensor head humidity
The sensor processor card also contains a humidity sensor. The value HD HUM is the relative
humidity inside the sensor. It is monitored by the diagnostics program.
6.5 Sensor verification
A company that maintains quality systems according to ISO 9000 quality standards must
have defined procedures for controlling and calibrating its measuring equipment. Such
procedures are needed to demonstrate the conformance of the final product to specified
requirements.
More information
‣ Sensor verification (page 242)
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