Instruction Manual
ExTox IMC-8/-4
BA_IMC-8_-4_e_2011-09-20.doc
Page 23 of 24
8.2
Connection to the Process
The connections for the measured gas inlet, test gas / flushing air, gas outlet and if so conden-
sate draining are marked at the bottom of the housing. The standard screw connections fit for
usual 6/4 hoses (6mm outer / 4 mm inner diameter). Connections for external stainless steel
piping are available on demand.
For usual laying of the line a distance of suction of up to 50 m length of hose can always be
realised. Longer suction distances are generally possible, but it has to be checked before if the
delivery rate of the pump is still sufficient.
At the measuring point the difference in pressure in comparison to the environment may not
exceed
±
100 hPa. We recommend contacting ExTox in case the pressure differences are higher
or the measured gas shall be returned to the process.
Please ensure that the line from sampling till measured gas inlet of IMC consists of suitable
material and is protected against damage and leakages.
Condensation inside the line, for example possible when sampling hot process gases, should be
avoided. The measured gas line should be placed with permanent incline to the sampling point
to allow the condensate to get back into the process. Hose loops in which a higher quantity of
condensate can be amassed should be avoided. Otherwise the condensate trap inside the IMC
may overflow on sudden suction of the complete condensate mass. The measuring readiness of
the IMC might then be temporarily impacted. In the worst case pump and transmitters are
damaged. In case bigger condensate masses cannot be avoided an additional condensate trap
(KSF1, Art. 700304) can be installed before the line gets into the IMC. If necessary please con-
tact your partner at ExTox.
Operation in most of the compositions of measured gas is reliably possible due to the construc-
tion of the IMC. Only for some in practice rarely occurring gases incompatibilities with the used
hose materials cannot be completely excluded. ExTox is on demand at your disposal for consul-
tancy. The hose material is compatible to the biogas components. It is essential to install a
flame arrestor at the measured gas inlet in case the measured gas is sampled out of hazardous
areas (already included for the Biogas-Types). If the measured gas should be lead back into
the process, another flame arrestor is essential at the gas outlet. On principle flammable or
toxic measured gases should be lead off safely, for example out-of doors via the roof.
8.3
Electrical Installation
The electrical installation may only be done by electro specialists according to the installation
regulations on the subject. Please ensure above all for an adequate protection against lightning
and overvoltage. All connections are inside the wall mounted housing. This can be opened via a
usual two cam lock key.
The cable glands are at the bottom of the housing. Connection to the external power supply is
done via the designated clamp block.
Connection of transmitters and additional devices (gas suction pump, flow meter etc.) has al-
ready been done factory sided. The respective assignment should be taken from the connection
scheme in your device specific documentation.
The IMC automatically starts operation with connection to the power supply.
