Self-Test On Starting (Optional) - holthausen elektronik ESW-small-Compact User Manual

Electronic Vibration monitoring Unit
ESW -small-Compact
®

After the expiry of response delay 2 for threshold value 2, relay 2 responds and the
red LED lights for a time period equal to release delay 2. Then the relay releases
again and the LED goes out.

After the completion of this test procedure the test is repeated until the switch S1 set
to OFF again.
Note: In case of short release delay periods (e.g. 0.5 s) the relay switches over
"apparently immediately" after responding (after the expiry of the response delay
period).
If an alarm memory is present for one of the two relays, the system must be
reset using an external reset button. Only after doing so, the test procedure starts
all over again.
This self-test checks that part of the electronics which cannot be monitored in the
background. In combination with the automatic tests in the background an unambiguous
conclusion regarding the function of the device can be drawn.
In the event of an error the relays do not go back to their idle state and the self-test can no
more be terminated by resetting S1. In addition, the green LED flashes four times briefly and
a fault current of 22mA can be measured at the analog output.
The test continues further when the cause of the error is remedied.
Function
Self-test ON
Self-test OFF

17.3 Self-test on starting (optional)

The tests running automatically in the background and the externally called self-test are run
on application of the operating voltage. In the event of an error the relays do not go back to
their idle state. During the duration of the test the green LED keeps flashing (it is common to
have non-uniform flashing during the changeover period between the individual tests.)
The test continues further when the cause of the error is remedied.
Caution: if the device has an external RESET, the external RESET output must be actuated
to complete the relay test.
The normal operation starts after the completion of the test.
Switch position
S1
ON
OFF
After execution of the self check the switch S1 must
be adjusted OFF "absolutely back to ", in order to
ensure a regular function of the
ESW ® -small-...Compact. The actual test run is
however only terminated.
14
holthausen
elektronik GmbH