Sample Gas Flows; Figure 7 Minimum Requirements For Start-Up Purging - Michell Instruments Condumax II User Manual

INSTALLATION
7. Allow the sample gas to purge the system for the period of time indicated below:
• Total purge time must be a minimum of 1 minute at 1 Nl/min (0.06
Nm
Assumes total system (see diagram below) pipe length is 3m (9.8ft)
and internal pipe bore is the recommended 4mm internal bore.
• For every additional meter of 4mm internal bore pipe work of a
sampling system, continue the gas purge for an additional 15
seconds at 1 Nl/min (0.06 Nm
8. After the appropriate purge duration the gas inlet isolation valve may be closed.
9. Return the manual override valve adjuster on the Solenoid to the
OPERATING
10. The enclosure cover may now be replaced. NOTE: Before any power or signal
lines are connected the enclosure cover must be fully fi tted.
11. After the enclosure cover has been refi tted the Condumax II is ready for immediately
start-up. NOTE: If start-up is delayed then the purge procedure must be
repeated.
GAS INLET
ISOLATION VALVE
GAS INLET
2.7

Sample Gas Flows

The sample gas fl ows for the system should be set as follows:
• For the hydrocarbon dew-point channel it is recommended that a fl ow of
approximately 1 Nl/min (0.06 Nm
fi gure is not required to be precise as its purpose is only to ensure that
a representative sample of gas is presented to the measurement sensor.
During the measurement cycle the sample gas fl ow is isolated as the
measurement is made in a static fl ow condition.
18
/hr) (2.1 scfh).
3
position (fully unscrewed counter-clockwise).
PRESSURE
GAUGE PRESSURE
REGULATOR
See NOTE 2
NOTE:
1. Connecting pipework to be 4mm I/D bore, 316L stainless steel tube
2. Components and pipework only required if water dew-point channel is installed into Condumax
Minimum Requirements for Start-Up Purging
Figure 7
Condumax II User's Manual
/hr) (2.1 scfh).
3
HYDROCARBON
FLOWMETER
DEW-POINT
CHANNEL
GAS IN GAS OUT
CONDUMAX II
FLOWMETER
GAS IN GAS OUT
WATER DEW-POINT
CHANNEL
/hr) (2.1 scfh) is set. This fl ow setting
3
97081 Issue 28.1, July 2018
NORMAL
NON-RETURN
VALVE
GAS OUTLET
See NOTE 2