1.1 OK Monitoring
Self-monitoring of the power supply, the internal microprocessor system as
well as the sensor status is done by the OK monitoring system.
An existing OK error is displayed by an LED and signalled by the change-
over of potential-free contacts of the OK relay. In the case of a fault the light-
emitting diode will go off and the contacts of the corresponding relay will
change over.
1.2 VIBROCONTROL 920 operation after switch-on or
power return
The instrument automatically executes a self-test lasting approximately 6
secs. each time it is switched on. Through this a calibration constant for the
measuring circuit is determined which is then calculated into the results of all
future measurements. During this self-test phase the status of the OK and
limit relays is retained as defined for an error-free condition.
After completion of the self-test the instrument switches to the monitoring
operation. After this time any exceedances of the pre-defined limit and
calibration values lead to corresponding event signals.
Attached safety instructions for installation,
commissioning and disposal must be
observed!
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