CIRAS-3 Operation Manual V. 1.09 181 support@ppsystems.com
Air Sampling Pump (Thomas)
Part Number 10127-1
Air Sampling Pump (Schwarzer)
Part Number 10181-1
Replacement of Reference and Analysis Pump
It is very easy to replace the reference and analysis pumps. First, trace the electrical connection to the
pump and disconnect the 2-pin connector from the terminal on the CIRAS-3 Flow board.
• Analysis Pump – Connected to connector labeled “AN PUMP”
• Reference Pump - Connected to connector labeled “REF PUMP”
The electrical connector is removed by gently bending back the connector lock and sliding out the
connector. Please note the orientation of the electrical connector for proper reconnection.
The pumps are secured in position by the gas tubing and pump retaining bracket. The pump can be
removed by gently pulling the gas tubing off both the inlet and exhaust ports on the pump and gently
prying the pump out from the securing pump bracket. Please note the gas in and out tubing to the
pump. To replace simply plumb the pump to the correct gas in and out tubing, secure the pump in the
retaining bracket and reconnect to the appropriate electrical connector on the Flow board.
Servicing the Air Sampling Pump (Reference & Analysis)
During pro-longed operation the vanes inside the pump may wear and deposit material inside the pump. If
these pumps are running erratically or sound louder than normal, we recommend cleaning the pump(s) by
flushing them through with iso-propyl alcohol.
The following procedure can be adopted:
1. Remove the gas tubing from the inlet and exhaust ports on
the pump and remove the pump from the CIRAS-3
console. Fit a small piece of tubing on both the inlet and
exhaust ports on the pump.
2. Hold the pump above a beaker of iso-propyl alcohol and
dip the tube into the alcohol.
3. Using a laboratory power supply, simply apply 5-6V to both
pins on the black electrical connector to power the pump.
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