Flow/Pressure Sensor - Teledyne 6200A Manual

Trs analyzer
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TAI Model 6200A SO

9.3.6 Flow/Pressure Sensor

The flow/pressure sensor board consists of 1 pressure sensor and a flow sensor. See Figure 9-6
for a diagram of this board. From these two sensors pressure and flow rate values are computed
and displayed on the front panel TEST functions. They are:
1. Sample gas pressure - measured directly S1, adjust R1.
2. Sample Flow - measured directly S3, adjust R3.
The above pressure and flow are filtered to produce the front panel readings. Several minutes
may be required for a steady reading if observing the TEST functions.
To adjust the sample flow, proceed as followings;
1. Remove the 1/8" fitting from the reaction cell.
2. Scroll to select SFLOW of the TEST functions.
3. Using independent flow meter verify the flow rate into the reaction cell.
4. Adjust R3 of the flow/pressure board to match the front panel display to the flow rate of
independent flow meter.
5. If not able to adjust then replace the flow sensor.
To adjust the sample pressure, proceed as followings;
1. Remove the 1/4" fitting from the reaction cell.
2. Scroll to select PRES of the TEST functions.
3. Adjust R1 of the flow/pressure board to read current ambient barometric pressure (typical
value at sea level is 29.9 Hg-In).
4. If not able to adjust then replace the pressure sensor.
Analyzer Operator Manual, 02164, Rev. G
2
9-49

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