CIRAS-3 Operation Manual V. 1.09
167
•
Dirty air supply unit hydrophobic filter. See
on page 183 for more details.
CO
2
exhausts from the cartridge quicker than usual and doesn’t last a full day
•
Slow leak around the regulator. Check regulator for leaks especially around the “O” ring at the
back. See
on page 190.
•
Bad or worn gasket seal. Replace the seal. See
on page 190.
•
Problem with piercing pin. Check that the piercing pin is in place and not broken or bent. See
on page 190.
CO
2
exhausts from the cartridge rapidly as soon as I attempt to install a fresh cartridge
•
Check the piercing pin to see if it is broken or missing. See
on page 190.
•
Bad or worn gasket seal. Replace the seal. See
on page 190.
My CO
2
readings are drifting
•
Exhausted soda lime. Replace.
My CO2d readings are fluctuating
•
Check your CO2r and CO2a readings. If one of them is fluctuating this will result in a fluctuating
CO2d and you should service the one that is fluctuating. See
Servicing the Air Sampling Pump
On page 181.
•
A leak in the gas circuit usually associated with the leaf cuvette gaskets. See
on page 194 to see if the problem is associated with the PLC3 or
CIRAS-3. Check leaf cuvette gaskets and replace if necessary.
•
Cracked or missing “O” ring on the PLC3 pneumatic connector. Replace and periodically
lubricate the “O” rings with silicone grease. See
on page 196.
My CO2d readings are always reading positive even with an empty cuvette and the
head closed
•
You most likely stored your CIRAS-3 in the black transport case with a pressurized CO
2
cartridge.
If so you will need to allow the system to equilibrate for a period of time before proceeding with
measurements. See
on page 14 for more details.
