BERTHOLD TECHNOLOGIES Uni-Probe LB 490 - Test Calculation (Test Signal Output)

Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
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Volume 7 5 Functional Processes
7
5.3 Test Calculation (Test Signal Output)
This function can be used to
• check the calibration
• simulate a sensor value
Enter the count rate which is to be calculated and output for the
process value.
IMPORTANT
During test calculation the operating mode of the device changes to
TEST. You can view the operating mode in the parameter
LE_OPERATING_MODE.
 Set the value for LE_SENSOR_TEST_VALUE to a pulse rate
– which corresponds to the empty pulse rate (to view the
sensor value “Empty”, typically 0%)
– which corresponds to the full pulse rate (to view the sensor
value “Full”, typically 100%)
– which corresponds to a calibration point (to check the sen-
sor value of the calibration point specifically)
– that is arbitrary (to check any sensor value)
IMPORTANT
The test mode is enabled if you enter a count rate >0.
During test mode the error relay indicates an alarm.
 Send the entry to the Uni-Probe.
 Check if
LE_SENSOR_VALUE indicates the expected value.
IMPORTANT
Set the pulse rate for LE_SENSOR_TEST_VALUE back to 0, as soon
as the test is finished in order to continue with the regular mea-
surement mode.
Parameters used
LE_OPERATING_MODE
LE_SENSOR_TEST_VALUE
LE_SENSOR_VALUE