13
8012707/ZVF9/V2-1/2019-04 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM32
Subject to change without notice
PRODUCT DESCRIPTION
2
2.5
GM32 design
The GM32
Probe
version comprises
●
Sender/receiver unit (SR-unit)
The SR-unit contains optical and electronic subassemblies.
The concentration calculation of the sample gas is performed in the SR-unit according to
the absorption spectroscope principle.
●
Measuring probe with flange or purge air fixture,
see “Measuring probe”, page 13
.
●
Purge air unit (for GMP measuring probe),
see “Purge air unit (for GMP measuring
.
●
Connection unit,
see “Installing the connection unit”, page 18
Fig. 2: GM32 Probe (version shown: GMP measuring probe)
2.5.1
Measuring probe
Probe types:
●
Measuring probe with open measuring gap (GMP probe).
GMP probes require a purge air supply to protect the window against contamination.
●
Gas diffusion probe (GPP probe) with gas permeable ceramic filter.
GPP probes are fitted with an automatically controlled heater to prevent condensate on
the windows.
Both probe versions have an integrated temperature and pressure sensor.
2.6
Purge air unit (for GMP measuring probe)
The purge air unit supplies filtered ambient air to the purge air fixtures and protects the
windows of the SR-unit from contamination and high gas temperatures.
The purge air is blown into the gas duct through the flange with tube.
SR-unit
GMP or GPP measuring probe
Measuring gap
(active measuring path)
Operator panel
(For the “Pro” variant)
GMP probe: Purge air fixture
GPP probe: Flange attachment
Purge air unit (for GMP probe)
Further information on the purge air unit
→
Operating Instructions of the purge air unit.
