50
NRG 26-61 - Installation & Operating Manual -
819874-00
Starting, operation and testing
Test
Checking the safety function by simulating the alarm state
In operating mode:
Press the rotary knob on the
NRG 26-61 and hold until the
end of the test:
1 x press and hold = low-lev-
el (LW) alarm
2 x press and hold =
high-level (HW) alarm
or
press button 1, 2, 3 or 4 of the
URS 60 / URS 61 safety control
unit and hold until the end of
the test
or
initiate the limiter test for the
NRG 26-61 level electrode on
the URB 60.
Display:
e.g. LO.LE and 000.0
alternating
The test simulates water falling below the
LW mark or rising above the HW mark.
The respective alarm message and the current
reading are shown alternately on the display
e.g. HI.LE and 100.0
alternating
LED 1
:
Alarm LED lights up red
MIN or MAX alarm
LED 2:
Operating LED is OFF
Alarm
■
■
The safety control unit URS 60 / URS 61 or equipment behaves as if there were
a real alarm.
■
■
Once the delay time has elapsed, the output contacts of the URS 60 / URS 61
are opened and the corresponding signal outputs are activated.
■
■
The test has now finished
Faulty equipment jeopardises plant safety.
■
■
If the level electrode does not behave as described above, it may be faulty.
■
■
Perform failure analysis.
■
■
The NRG 26-61 level electrode may only be repaired by the manufacturer, GESTRA AG.
■
■
Only replace faulty equipment with identical equipment from GESTRA AG.
