Axetris LGD F200P2, Инструкция по эксплуатации и интеграции

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Axetris AG LGD F200P2 Operating Instructions - Rev D 19.09.2018 16/60
Figure 8 LGD (H)
Evaluation Kit heater
power supply
Figure 9 Cable connector for the two
flow-through cell heaters
Figure 10 Heating element cable
connector plugged to the LGD
Figure 11 Cell heater screw terminal
connector assignment.
Head view electronics housing.
Table 3 Connector assignment for cell heating elements (H-version only):
Pin Name Description Cable colour
1 PGND Power ground (PGND is internally isolated from
GND IN and GND) Brown
2 12VP1 Power supply 12V. Consumption: < 48W (max
ripple 120mVpp) Red
3 PGND Power ground (PGND is internally isolated from
GND IN and GND) Yellow
4 12VP1 Power supply 12V. Consumption: < 48W (max
ripple 120mVpp) White
If the temperature of the incoming measurement gas has a temperature higher than the
cell, there exists a high risk of condensation and irreversible damage to the cell.

For proper measurement results, the temperature of the incoming gas needs to be
close to the measurement cell temperature (± 5°C / 41°F).
Figure 12 displays a schematic setup for a NH
3
hot-gas evaluation measurement. In order to make
accurate measurements of hot gases, we recommend the use of industry-standard heated gas-lines (see
Figure 7 ) to provide a sample gas with a well-defined temperature. Incoming sample gas needs to be at
the same temperature as the measurement cell (± 5°C / 41°F). For ammonia measurements 190°C /
374°F are recommended (or 220°C / 428°F for gas containing high SO
2
)
Carrier gas can be a bottle of compressed air. Humidity can be enhanced by guiding the stream through a
bubbler. The carrier gas and the target gas (bottled ammonia is available in different concentrations) can
be mixed using mass flow controllers (MFC). The sample gas is then guided to the sensor by using a
heated and temperature stabilized hose. The length of the hose needs to be chosen according to the set
gas flow in order to allow sufficient heating of the gas. Adjusting the gas temperature to the same
temperature as the sensor temperature (i.e. the temperature for which the sensor was calibrated) is
important in order to obtain accurate results. This is best controlled by a temperature sensor in the gas
flow prior to the measurement cell.