Connection Of Backpurging And Calibration Gas Line; Electrical Connection - M&C SP2500-H Series Instruction Manual

12.4

CONNECTION OF BACKPURGING AND CALIBRATION GAS LINE

The backpurging pressure must be higher than the process pressure.
Attention
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 0.7 bar). Connection of the
backpurging or calibration gas line takes place on the underside of the probe. Provided for this purpose
is a tube with the dimensions Ø 8 x 1 mm.
The connection for the optional second sample gas outlet is ¼" NPT i. 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 backpurging gas (see Figures 2 and 3):
Backpurging gas tube connection Ø 8 x 1 mm, und
•
Calibration gas tube connection Ø 6 x 1 mm.
•
Control of the isolating valve I takes place separately within a pressure range of 3 to 10 bar. This valve
has a 1/8" NPT i 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.
Danger
Note
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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.
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.
SP2500-H | 1.00.02 19