CIRAS-3 Operation Manual V. 1.09  180  support@ppsystems.com 
 
External Battery Pack (For extended operation in the field) 
A convenient battery pack (STD551) can also be used for extended operation in the field. 
 
Belt Pack Kit – Battery, Charger and Power Supply 
 
Air Sampling Pumps (Reference and Analysis) 
The CIRAS-3 has 2 rotary vane pumps used for sampling the reference and analysis air and should be 
inspected periodically.  Rotary vane pump components wear with prolonged use and material from the 
vanes may build up over time within the pumps.  The risk of this situation from occurring can be 
minimized by regular pump cleaning with alcohol.  
Typically, the following symptoms are attributed to a worn or faulty reference or analysis pump: 
Noise – a worn pump usually sounds rough or vibrates. 
Temperature – the outer casing (near the pump serial number) feels warm compared to other 
pumps. 
Please note. We changed over to a new air sampling pump in July 2017.  All instruments supplied prior 
to July 2017 would have been supplied with Part Number 10127-1 (Manufacturer: Thomas) and all 
systems supplied starting July 2017 would have been supplied with Part Number 10181-1 (Manufacturer: 
Schwarzer). 
 
Connection to CIRAS-3 
via EXT PWR socket