M&C TechGroup SP2500-H_C_I_BB_F Operator's manual - Manual (Page 17)

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Gas sampling and gas conditioning technology 2-1.1.5-ME
12.4 CONNECTION OF BACKFLUSHING AND CALIBRATION GAS LINE
A T T E N T I O N !
The backflushing pressure must be higher than the process pressure.
Pay attention to the maximum pressure level (see technical data).
SP2500-H:
For option “C”, a check valve is fitted (see Figure 1, opening pressure 0.7bar). Connection of the
backflushing or calibration gas line takes place on the underside of the probe. Provided for this
purpose is a tube with the dimensions Ø8 x 1mm.
The connection for the optional second sample gas outlet is ¼“ NPTi. The thread is closed with a
cover.
SP2500-H/C/I/BB(/F):
In the versions SP2500-H/C/BB and SP2500-H/C/BB/F, separate connections are available for
calibration and backflushing gas (see Figures 2 and 3):

Backflushing gas tube connection Ø8 x 1mm, und

Calibration gas tube connection Ø6 x 1mm.
Control of the isolating valve I takes place separately within a pressure range of 3 to 10bar. This valve
has a 1/8“ NPTi connecting thread.
12.5 ELECTRICAL CONNECTION
Temperature adjustment of the SP2500-H/.. series probes generally takes place with a capillary
controller. The probe can also be provided with an optional PT100 or thermocouple. This requires the
connection of an external thermostat.
D A N G E R !
An incorrect system voltage can damage the device. Ensure that the
system voltage corresponds to the voltage shown on the rating plate
prior to connection!
The probes must be mounted so that any contact with live parts is
impossible!
The use of heat-resistance cable is recommended in any event!
The alarm contact excess temperature must be monitored!
In the event of an excess temperature alarm (failure of the probe
heating or sensor) the sample gas supply must be interrupted to
avoid damaging the probe or subsequent components.
N O T E !
For the erection of power installations with rated voltage up to 1000V,
the requirements of VDE 0100 as well as relevant standards and
specifications must be observed.
An external main switch must be provided.
The supply circuit of the device must be protected with a fuse
corresponding to the rated current (overvoltage protection); electrical
values are shown in the technical data.
When fitting a capillary or PID controller at the sample point, the
maximum permissible ambient temperature must be observed (see
8.). If this temperature is exceeded, a PID controller must be provided
externally and outside the temperature-critical zone.