AdEM™-PTZ
ROMET LTD. 37
8. TESTING
The verification of the pressure and temperature sensor and PTZ conversion accuracy and Output Pulses function
and connection are performed within the TESTING mode. Access to the TESTING mode is protected by the password
and is accessible with the Program Switch in either ENABLE or DISABLE position. Incoming pulse processing is not
affected during staying in TESTING mode. Therefore, TESTING mode is suitable for using with AdEM®-PTZ installed
in the field applications.
The TESTING mode has volume registries that operate exclusively of the normal volume registries for the AdEM®-
PTZ. The normal UNC VOL and COR VOL registry values are saved in memory when the TESTING mode is accessed.
When the TESTING mode is exited, the normal UNC VOL and COR VOL registry values revert to the saved values with
the addition of the applied test volumes. The additional COR test volume is calculated using the last saved pressure
and temperature measurements (last values before entering the TESTING mode). Also, the regular Output Pulses for
the test volume are generated during the TESTING mode. Those output pulses are not related to tested parameters
(temperature and pressure) under TESTING mode.
Testing Mode Flowchart
PTZ Conversion
In PTZ CONVERSION (CONVERT) test, the UNC VOL and COR VOL test registries are automatically initialized to zero
when entering this menu. The test registries are displayed to four (metric) or three (imperial) digits after decimal
points to deliver a high-resolution reading and, thereby, reduce the required test volume for completing the
conversion test. During a test the total conversion factor for the AdEM®-PTZ is calculated live from measured values
of pressure and temperature references.
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