Instruction Manual
ExTox Bio-Compact
BA_Bio-Compact_e_2015-10-22.doc
Page 11 of 12
6
Operation of Bio-Compact
The operation of the control unit ET-4D2 is described in the Instruction Manual of the Control
Units Series ET-8D and ET-4D2.
Furthermore the following remarks are valid for the additional functions and options.
6.1
Flow rate monitoring
A flow rate monitoring is integrated in the transmitter module. Flow rate monitoring is based on
measurement of pressure difference. The alarm is given in case of under-scale of a preset
nominal value. This value is set factory sided. The under-scale message leads to system fault
of the control unit.
6.2
Flame Arrestor
A flame arrestor is integrated in the transmitter module. It has to be ensured that the flame
arrestor is not clogged with dust or condensate. In other aspects it is maintenance free.
Please note that the measured gas should only contain flammable gases of ignition protection
up to IIB3, such as for example methane. Typical biogas compositions are covered.
7
Application Hints
Here the application remarks in the Instruction Manual of the Control Units Series ET-8D and
ET-4D2 are valid.
8
Installation
8.1
Mechanical Installation
The wall mounted housing should be installed at an easily accessible place to enable the
reading out of messages at every time and to ensure an easy maintenance.
Please pay attention to the indicated operation temperature for the Bio-Compact. The bio-
Compact should be installed protected against weather conditions and bigger climatic fluctua-
tions.
In general we do not recommend an installation outside, as in principle measuring accuracy
and lifetime are influenced in a negative way. In case it is however necessary, please contact
ExTox to design a suitable protection.
The dimensions for assembly and further installation dimensions can be taken from the Tech-
nical Data Sheet ( DB).
The Bio Compact itself may not be installed in hazardous areas.
8.2
Connection to the Process
The connections for the measured gas inlet, test gas / flushing air and gas outlet are marked at
the bottom of the housing. The standard screw connections fit for usual 6/4 hoses (6 mm out-
er/4 mm inner diameter).
For usual laying of the line a distance of suction of up to 20 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 and + 50 hPa.
Please ensure that the line from sampling till measured gas inlet of the Bio-Compact consists of
suitable material and is protected against damage and leakages.
Condensation inside the line should be avoided. The measured gas line shall 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 shall be avoided. Other-
wise the measuring readiness of the Bio-Compact might then impacted temporarily when suck-
ing water. In the worst case pump and transmitters are damaged. In case bigger condensate
