ANKOM RF - Manual (Page 45)

Operator’s Manual
Rev F 8/29/14
pg. 45
Appendix C – Head Space Analysis
The collection of gas for Head Space Analysis can be done through the septa port on the glass bottle shown below
using a gas-tight syringe.
Septa Port
Liquid can also be sampled through this port by rotating the bottle and allowing the liquid into the port area. Glass
bottles with septa ports can be ordered separately.
If gas or liquid are removed through the septa port the computer will see it as a
loss in pressure.
It is also possible to collect a gas sample through the vent valve using the adapter provided with the Vent Valve
Cleaning Kit (part # RF22). Additional Vent Valve Adapters (part # RF22.5) can be purchased separately.
Vent Valve Adapter
To collect gas from the vent valve, execute the following procedure:
(1) Gently push the barbed end of the Vent Valve Adapter into the vent valve tube
on the side of the housing. The adapter comes standard with a female Luer
thread for connection to a gas tight syringe.
(2) Plug your syringe into the Vent Valve Adapter.
(3) Pull the plunger out to create a vacuum.
(4) On your GPM screen, change the Live Interval to 1.
(5) On your GPM screen, enter a Pressure Release value that is lower than the
bottle’s current pressure.
(6) Once the pressure release value has been entered in the cell on the computer
screen, press <Tab> or <Enter> on your keyboard to activate that Module. Do
not check the
Valve Open box. The valve will open to release pressure and the
gas will flow into the syringe. Depending on the gas volume to be removed, it
is possible the valve may cycle several times.
(7) Remove the Vent Valve Adapter by holding the vent valve tube against the
housing with your finger (to avoid stretching it), and pull the adapter out.
(8) When you have removed the gas that you want, on your GPM screen, set the
Pressure Release value back to its original setting.
If gas is removed through the vent valve the computer will NOT see it as a loss
in pressure.