Testing The Electrodes; Suggested Test For Water-Normal Setting - Emerson Mobrey Hydratect 2462 Reference Manual

System Testing
March 2017
4.2

Testing the electrodes

4.2.1

Suggested test for water-normal setting

Note
This test requires the electrode to be in its normal state (e.g. immersed in water).
1.
2.
3.
4.
5.
a.
b. Status relay energized
6.
a.
b. Place a 10 M resistor in series with the electrode sense element terminal and
7.
40
Inspect the accessible parts of the Control Unit and cabling for any damage, and
the electrode inserts and covers for any leaks or damage.
Bypass the safety function and take appropriate action to avoid a false trip.
Independent precautions must be taken to ensure that no hazard can result
from this operation.
Verify the Control Unit jumpers are set for the required mode of operation.
(See "Setting the printed circuit board (PCB) jumpers" on page 23
Check the front panel LED states are as expected:
! LED off
STEAM LED off
WATER LED on
Check the fault and status relays are as expected:
Fault relay energized
To simulate the electrode in steam:
Remove the white and red conductors.
conductors.
Check the front panel LED states are as expected:
! LED off
STEAM LED on
WATER LED off
Reference Manual
Red
10 M
White
Black
Black or blue
24625020, Rev AA
to check this).
System Testing