
Alarm Board Configuration
Analogue O/P Configuration
The analogue output board is factory configured for either
-5 to +5V, 0-10V or 4-20mA and will require no adjustment
other than setting the reading values to generate 0% and
100% of output, using the front panel pushbuttons.
However, to change a range,for example from 0-10V to
4-20mA, the zero and span potentiometers must be ad-
justed to obtain the correct output levels at 0% and 100%.
-5 to 0 to +5V 0-10V 4-20mA
Open Contacts
Closed Contacts
Select relay output contact status, when relays
are de-energised (power removed from meter)
by placing these jumpers...
Energise
De-energise
Energise
De-energise
Energise
De-energise
Energise
De-energise
For failsafe operation (where contacts open on alarm or
when power is lost to the meter) set the jumpers for
OPEN CONTACTS and DE-ENERGISE on alarm.
Using the ALARM button on the Fascia, you may per-
form the following actions:-
VIEW Setpoint values and alarm action only
Press ALARM key briefly. The display will show AL1
setpoint and action (H= High Alarm, L=Low Alarm, o=No
Alarm). Each press of the key will take you on to the next
alarm channel, see the Alarm annunciators for channel
identification.
VIEW & CHANGE Setpoint Values and alarm action
Press ALARM key for more than 3 seconds. AL1 annun-
ciator will show, and you will see one digit is brighter
than the others.
Use DIGIT key to select a digit and the UP or DOWN
key to amend a digit’s value. The left hand digit sets the
alarm action as HIGH, LOW or off, with an H,L or o ,
respectively.
When all digits are set as desired, press OK.
VIEW & CHANGE Hysteresis Values
After setting alarm value, display will show HYXXXX
Where HY means hysteresis and XXXX is the amount of
hysteresis. Set and store value as for alarm setpoint.
To gain access to the alarm board, first remove power
from meter, including any power which might be present
on the alarm output circuitry.
Look on the top and bottom surfaces of the case, near
the rear. You will see two small screws, one on each sur-
face. Remove both screws. Now, clip off the front bezel
and slide the meter assembly carefully out via the front of
the case.
To re-assemble, reverse this procedure.
AL1 AL2 AL3 AL4
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ZERO SPAN
This potentiometer may not be fitted on all boards.
It is only to be adjusted in the factory.