325.6030.7
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5
START-UP, OPERATION AND MAINTENANCE
5.1 Electrolyte filling at start up
Refer to figure 5.
Switch off power supply or unplug instrument.
Remove cover rising it.
Disconnect cell cable from terminal block noting carefully position of each cable.
Disconnect exhaust tubing from the cell.
Unscrew the four retaining screws and drop bottom half of cell from the upper for filling.
The electrolyte bottle contains a dropper. Fill dropper stem to mark 1ml- Carefully transfer electrolyte from dropper
to cell, taking care not to allow it to touch the top surface of the cell.
Remove any electrolyte on this surface with a tissue then reassemble cell together taking care not to tilt the
bottom half too much.
Reassemble exhaust tubing, reconnect the cell cable, replace lid and finally reconnect supply cable and switch on.
Hold RESET switch down until alarm lamp ceases to flash then wait further 5-10 sec. before releasing
switch (this operation can take up to 3 minutes.)
The unit is now in operation.
5.2 Electrolyte renewal after operation
Approximately once a year or as necessary the electrolyte should be renewed.
Proceed as for start up but wash the electrolyte thoroughly from the cell with water and gently clean the
electrode faces with a non abrasive chlorine-free cleaner.
Again thoroughly wash cell with water, dry with a clean tissue and refill with electrolyte as described under
Section 5.1.
5.3 Sample flow rate
At start up set the sample flow so that the flow indicator sits between the two graduation marks on the
flowmeter tube.
The flow may be adjusted by inserting a broad bladed screwdriver in the rate valve and gently twisting until the float
is properly positioned.
This should be done with the air control knob in the wide open position.
If the required cell flow cannot be obtained, the air control knob should be gradually closed, until the
adjustment of the float position is possible.
The position of the float in the flowmeter tube should be checked from day to day (during the first week) and
adjusted if necessary.
5.4 Gas test
Verify the instrument operation in presence of chlorine gas after the start up.
The test suggested hereafter is only qualitative and can be performed using solutions commonly available such as
bleach and vinegar.
Mix 6 parts of bleach and one part of vinegar in a beaker.
Place the beaker under the sampling fan. The alarm LED should start flashing and any remote device connected to
the alarm relay should be actuated.
The alarm is reset by pressing RESET switch till the alarm LED stops flashing
(this operation may require up to 3 minutes).
