M&C TechGroup SP2400-H Operator's manual User Manual
Page 27
2-1.1-ME
Gas sampling and gas conditioning technology
27
N O T E !
If the rated value temperature needs to be lowered more than 28°C
in one step during operation, the thermostat's excess temperature
switch-off is triggered!
W A R N I N G !
When working during operation:
High surface temperatures!
Touching the surfaces can result in burns. Wear protective gloves
and any unauthorized access to the probe must be made impossi-
ble !
16.1
GAS SAMPLE PROBE SP2300-H
At the gas sample probe SP2300-H exists the electrical heated filter body from carbon filled PTFE.
When heating up the probe, conditionally through the different linear exparsion between PTFE and the
heater body manufactured from aluminium, the extension of the PTFE-part is lager than the Aluminium
part.
N O T E !
We recommend therefore, to loosen the locking screw in the clamp,
at the first heating up, to relieve the O - rings in the cover, or better
remove the complete filter housing lid.
After reaching the operating temperature (>2 hours) insert the complete filter housing lid in the probe,
and press the clamp by turning the locking screw.
16.2
OPTION CALIBRATION GAS FEEDING AND BLOW BACK
16.2.1
OPTION CHECK VALVE /R
In order to backflush the probe tube or the prefilter, flush gas is fed via the backflush valve /R. It is
advisable to disconnect the downstream analysis system from the probe before doing this in order to
avoid pressure shocks on the system. The check valve's opening pressure is 0,7bar.
N O T E !
In order to prevent the probe's interior from cooling down, back-
flushing should as far as possible only be carried out for short in-
tervals <1s or use a gas pre-heater type GVW.. (see data sheet 2-
1.2.5).
N O T E !
Feed the back purge gas as quick as possible and with a big nomi-
nal width in order to avoid a loss of pressure in the feeding line
during the back purge action.
The analysis system remains closed while calibration gas is being fed.
The amount of calibration gas should be at least 25% greater than the amount of sample gas drawn
into the analysis system in order to avoid mixing with the sample gas.