Commissioning
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optek-Manual--1004-1022-02--156-US-2017-12-11
9.6
Setting alarms
Limit values
Two alarms that may be set independently are available as standard. Their
switching status is indicated at the red LEDs (3, 7) on the front.
For adjusting the setpoints, actuate the encoding button (6) for alarm 1 and the
encoding button (4) for alarm 2.
The alarms are set in steps of 1 % of the set measuring range from 0 to 99 %.
Alarms are enabled with integrators so that the responding behavior is
automatically adjusted to the process dynamic. A slight (slow) exceeding of the
set limit value leads to delayed alarm, a strong (fast) exceeding leads to imme-
diate alarm.
Alarm in case of lamp
failure
A lamp failure or similar system failure is indicated by light-up of the lamp failure
LED (8) on the front panel and reported by the lamp failure relay at terminals 16,
17 and 18. As a result, the signals fall below the minimum sensor signal which
triggers both limit value relays and makes the alarm LEDs (3, 7) light up. The
lamp failure relay is operated enabled, i. e. the relay is picked up in normal
operational state. If the lamp current falls below the minimum value of approx.
310 mA, the lamp failure relay is disabled. If the corresponding request is given,
this allows monitoring regarding lamp and power failure.
Fig. 23
LEDs and encoding buttons for alarms
3
4
6
7
8
