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6.1 Installation specifications
The installation of this equipment must conform to any national, local, or company
codes applicable to the location. Elster-Instromet assumes no responsibility for
compliance with these requirements. It is suggested that a review of the codes be made
prior to installation.
ATTENTION
Installations in the US shall comply with the relevant requirements of the
National Electrical Code® (ANSI/NFPA-70 (NEC®). Europe installations
shall comply with the 60079-14 according the attached certificates
6.2 Design of the measurement point
A typical measurement point consists of up to five sampling lines from the gas
pipeline(s) to the measuring instrument. If the pipeline pressure is higher than the
maximum inlet pressure, a pressure reduction system must be installed and adjusted
upstream of the sample gas inlet.
The streams of gas are measured in sequence. Gases which have passed through the
device are fed into the waste gas.
The carrier gas and calibration gas are generally supplied from gas cylinders with
pressure reducers installed near the device. These auxiliary gases are used to maintain
operation and measurement accuracy. The gas supply will generally last for several years
of operation and can be increased if necessary by using a changeover valve. This option
is shown on the helium cylinders in the picture below.
All components and pipelines (made of stainless steel) should be installed permanently
and may require additional heating. The waste gases must not cause any backpressure
in the exhaust system and must not interfere with each other. To enable this, the gas
from the module vent (MV) must always be discharged separately. The power supply and
the communication cables must be connected and installed as usual in industrial
environments. The following diagram shows a typical system layout in simplified form:
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