M&C TechGroup SP3200 Operator's manual - Manual (Page 20)

20 Gas sampling and gas conditioning technology 2-1.3.9-ME
At sampling points with inerting, backflushing must be performed with corresponding inert gas.
It must be ensured that the inert gas does not introduce oxygen or combustible gases into the
system.
The backflushing pressure must not exceed 6 bar abs..
Do not choose back flush intervals longer than 3 seconds because in case of strong pollution of
the pre-filter pressure inside the probe would be rising and than discharging to the analyser via
the pressure control valve in the outlet of the probe due to a defined leak rate of this valve.
 Now, refit the cover and fasten it with the toggle-type fasteners.
The probe and all options must be earthed. The bleeder resistor must be < 10 6
 everywhere.
The function of the probe must be monitored by a flow controller at the downstream analys-
er. A steady decline in the sample gas flow can be an indication of the need for maintenance
work on the probe. The probe must be serviced when the flow rate drops below 50%.
We also recommend the installation of an additional submicron filter in front of the analyser system.
- Further information can be found in the Internet at
www.mc-techgroup.com .
13 ELECTRICAL CONNECTION
A wrong supply voltage can damage the device. Make sure that the supply voltage corre-
sponds to the voltage shown on the rating plate before connecting the device.
The requirements of VDE 0100 and its associated standards and regulations must be observed
when erecting high-voltage power installations with rated voltages of up to 1000 V! In any case,
we recommend the use of heat-resistant cables.
An external main switch must be provided.
For option /RS, the cable of the solenoid valve must be connected in a suitable EEx e connec-
tion box.
A fuse suitable for the rated current of the solenoid valve (max. 3xIB per DIN 41571 or IEC 127)
or protective motor switch with short-circuit and thermal rapid release (set on the rated cur-
rent) must be installed in front of the solenoid valve as short circuit protection. The rated volt-
age of the fuse must be equal to or higher than the specified rated voltage of the solenoid
valve. The breaking capacity of the fuse link must be equal to or higher than the maximum
conceivable short circuit current at the place of installation (usually 1500 A). The fuse value is
specified on the magnet coil – Fuse 0.1 A for 230V/50Hz or 0.2A for 115V/60Hz.