mru VARIOluxx, Руководство пользователя

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User Manual VARIO luxx
MRU GmbH, D-74172 Neckarsulm
19 / 129
3.8. Gas conditioning
The sucked sample gas is dried and filtered before it is fed to the
sensors.
A sample gas cooler with Peltier element is used for drying.
The condensate liquid appearing in the gas cooler is pumped to the con-
densate outlet by means of a peristaltic pump. The condensate forms
drops at the outlet of the instrument.
Optionally, connect a hose (DN 4/6) to the condensate drain.
A hose (DN 4/6, not longer than 5 m) can also be connected to the
sample gas outlet for discharge.
For subsequent filtering, a round filter is used on the front of the
analyser.
3.9. Gas supply
The analyser contains a gas feed pump (diaphragm pump).
The flow through the gas feed pump is measured and regulated to the
nominal value by the analyser.
If the pump capacity is not sufficient to reach the flow of the nominal
value, an alarm is issued.
If the flow does not reach the nominal value despite an increase of the
pump capacity, the pump is switched off after a while to protect the
analyser.
3.10. Gas sensors
The analyser has three types of gas sensors:
1. The analyser works with electrochemical sensors to measure O
2
(oxy-
gen), CO (carbon monoxide), NO (nitrogen monoxide), NO
2
(nitrogen di-
oxide), SO
2
(sulphur dioxide), H
2
S (hydrogen sulphide).
2. The analyser works with a paramagnetic sensor for the
Measurement of O
2
(oxygen).
3. The analyser works with a non-dispersive infrared absorption
measurement.
Depending on the installed NDIR module, this measuring principle makes
it possible to measure CO (carbon monoxide),
CO
2
(carbon dioxide), CH
4
(methane) and C
3
H
8
(propane).