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TEXAS ANALYTICAL CONTROLS
4418 Bluebonnet Drive | Stafford, TX 77477 | (281) 240-4160 |
www.tac-controls.com
4 Controls and Their Operation
4.6.2 Pump & Flow Fail Alarms
There are two pressure sensors in each analyzer; one for the
internal pump and one if the flow is obstructed to the analyzer.
The internal pump that clears the H
2
S sensors between cycles
typically lasts 3-5 years. If it fails, the main screen will flash
“PUMP FAIL.” If the sample flow is obstructed, the analyzer will
stop functioning and the main screen will flash “FLOW FAIL.”
If either fail alarm re-occurs, and you suspect a
false failure
,
the pump or flow fail switch can be adjusted. If the switch has been adjusted and the pump or flow fail
warning returns, then the pump or flow fail warnings can be disabled until the switch can be replaced.
During a pump or flow fail, the main screen displays the following:
Pump/Flow Fail Assembly – 12v or 24v
To Clear Flow Fail
1 Ensure that the regulators and flow meter(s) are
working properly.
2 Check that the sample line for obstructions and
clear them.
3 Press the ACKNOWLEDGED button on the main
screen to clear alarm.
To Clear Pump Fail
1 Touch the pump to verify that it is still vibrating
and, therefore, working properly.
2 Press the ACKNOWLEDGED button on the main
screen to clear alarm.
To Adjust the Pump or Flow Fail Sensor
1 Using a flat head screwdriver turn the
potentiometer clockwise a ½ turn.
2 Press the ACKNOWLEDGED button on the
main screen to clear alarm.
3 Wait approximately 2 minutes to make sure
the flow or pump fail doesn’t return. Repeat the
process if necessary.
4 If the trim pot screw is bottomed out then the
switch will need to be replaced.
To Turn Off Fail Warnings
1 From the alarm setting menu, press the PUMP or
FLOW FAIL button to display the settings screen.
2 Press the UP/DOWN ARROWS to toggle between
“on” and “off” and press ENTER to save.
Tip:
The following
instructions are also
available by pressing
the HELP button on
the menu screen.
FAIL
FAIL
