M&C SP Series, Instruction Manual

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www.mc-techgroup.com SP2000, SP2300, SP2400 | 1.00.03 29

If a ball valve is fitted, operate this via the pneumatic drive or for a 2/2-way ball valve by turning the control grip
by hand up to the left-hand stop and for a 3/2-way ball valve into mid position.

The probe is ready for operation now.
Note
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! To
switch on again, the reset button must be pressed.
Warning
When working during operation:
High surface temperatures!
Touching the surfaces can result in burns. Wear protective gloves and any unau-
thorized access to the probe must be made impossible!
16.1 GAS SAMPLE PROBE SP2300-H
At the gas sample probe SP2300-H exists the electrical heated filter body from carbon filled PTFE.
Due to the difference in linear expansion between PTFE and the aluminum part of the heater, the PTFE inner part
expands more than the aluminum part of the heater when it heats up. The difference in length is compensated for
by a spring in the cover part.
Caution
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 0.7 bar.
Note
In order to prevent the probe's interior from cooling down, backflushing should
as far as possible only be carried out for short intervals < 1 s or use a gas pre-heater
type GVW.. (see data sheet 2.23).