Michell Instruments Condumax II, Руководство пользователя, Страница: 16 / 28

Condumax II Transportable
Sampling System User’s Manual
10 97438 Issue 3, April 2019
OPERATION
Water dew point is measured at the prevailing full line pressure, the condition
at which the highest water dew point will exist.
80
70
60
50
40
30
20
10
0
Pr
essur
e,
Bar
a
-40 -30 -20 -10 0 +10
Temperature, ºC
Water and HC
liquids
present in
gas HC liquids
present in
gas Wholly gaseous
HC Dew Point
Water Dew Point
Cricondentherm
13. Re-adjust the hydrocarbon & water dew-point sample gas flow rate to
approximately 0.06Nm³/h (2.1scfh) using the Sample Flow Metering Valve
(
MV1
) and allow the readings to stabilize - the readings from the first 2
or 3 HC dew-point measurement cycles should be disregarded.
3.2 Sample Flow Shut Down Procedure
!
WARNING
If accessing inside the Condumax II Exd housing for
maintenance, a mandatory waiting period is stipulated as part of
the certification of the Condumax II product.
After power down, a minimum period of 45 minutes must be
observed before removing the cover of the Condumax II Exd
housing.
1. Isolate the Sampling System from the sample gas supply line.
2. Allow a short time for the Sampling System to vent/depressurize before
attempting to carry out any work on the system.
3. Isolate the Sampling System from the power supply.
4. If moving, transporting or storing the Condumax II, remove the sample
hoses and refit the caps to the quick connect couplings. Note the
orientation requirements in Section 2.1.