M&C TechGroup SP3200 Operator's manual - Manual (Page 10)

10 Gas sampling and gas conditioning technology 2-1.3.9-ME
In principle, you need only a small quantity of test gas for probes with an integrated ball valve, because the
probe is separated from the process when the ball valve is activated so that there is no danger of a mixture
with the process gas.
In case of manual operation, please turn the turning handle to the right side until the limit stop in order to
shut off the probe.
N O T E !
In case of low pressure operation, please take into consideration that as from 300 mbar
secondary air will be taken in via the non-closed check valve.
8.3 OPTION /CC, /CCF TEST GAS FEEDING BEFORE OR BEHIND THE PROBE FILTER TO BE SELECTED BY
THE USER
The normal execution ex our works provides the feeding of test gas before the probe filter (Function /CC). By
changing the insert in the fitting for the check valve against the insert additionally attached, this function can
be changed so that test gas can be fed behind the probe filter (Function /CCF).
8.4 OPTION /C/I TEST GAS FEEDING VIA CHECK VALVE BEHING THE PROBE FILTER WITH PNEUMATIC
STOP VALVE OF THE PROBE OUTLET TO THE PROCESS
By activating the pneumatic stop valve with compressed air, the measuring gas way behind the probe filter is
shut off. Now, you can feed test gas via the check valve to the sample gas outlet of the probe without any
loss.
8.5
OPTION 2-WAY BALL VALVE
For any service work, eg. changing of the filter element or cleaning works, the stop valve in the probe inlet is
actuated from outside with the turning handle. This becomes necessary eg. in case of overpressure in the
process or in case of toxic gas components.
In case of toxic gas components, please backflush the probe after shut off and before opening!
8.6
OPTION SPUN GLASS CARTRIDGE FW
For option FW the filter element is dropped and a spun glass cartridge is mounted at the filter housing lid.
This spun glass cartridge is filled with a high temperature resistant spun glass. The option FW is used at sam-
ple points with risk of quickly blocking filter surfaces due to taar or sticky substances.
The use of standard filter elements S-3SS150 oder S-2K150 is not possible with option FW.
8.7
OPTION /3VA TEST GAS FEEDING AND BACKFLUSHING VIA 3/2-WAY BALL VALVE
With the 3/2-way ball valve, you can execute both functions „backflushing“ and „test gas feeding“ one after
the other. Only one operation each may be automated via the pneumatic actuation.