Teledyne API Model 200AH NO
X
Analyzer Instruction Manual, 06492, Rev. G2
9-54
To adjust the SAMPLE PRESSURE:
1. Go to DIAG mode by pressing SETUP-MORE-DIAG, then select SIGNAL I/O, and press
ENTR. Select SAMPLE_PRESS by using NEXT-PREV keys.
2. Adjust R1 to read 4100 mV. This is the coarse adjustment.
3. Press EXIT to return to the SAMPLE mode. Select SAMP - TEST function. Use a calibrated
absolute pressure meter to make small adjustments to R1 until the correct absolute pressure is
displayed. 29.92 in-Hg-A is the target value at sea level. The rate of decrease is about 1"-Hg
per 1000 ft of altitude.
To adjust the REACTION CELL PRESSURE:
1. Go to DIAG mode by pressing SETUP-MORE-DIAG, then select SIGNAL I/O, and press
ENTR. Select RCELL_PRESS by using the NEXT-PREV keys.
2. Disconnect the vacuum pump at the Sample Exhaust port on the instrument rear panel.
3. Press EXIT to return to the SAMPLE mode. Select RCEL - TEST function. Use a calibrated
absolute pressure meter to make small adjustments to R1 until the correct absolute pressure is
displayed. 29.92 in-Hg-A is the target value at sea level. The rate of decrease is about 1"-Hg
per 1000 ft of altitude.
4. Re-connect the sample pump. The RCELL reading should now display the reaction cell
absolute pressure of approximately 5 in-Hg-A.
To adjust the SAMPLE FLOW:
1. In SAMPLE mode, scroll the TEST functions to SAMP FLW. Observe the reading. Then
subtract the observed reading from the desired reading.
2. Go to the VARS menu by SETUP-MORE-VARS, then pressing ENTR. Scroll to
SFLOW_SET and press EDIT. The first value displayed is the SFLOW_SET:VALUE
reading, ADD the value from step 1 to the reading shown and key in the new reading, then
press ENTR. Check the low and high warning limits, which are displayed as the next 2
values to make sure the new value does not exceed the warning limits. Press exit to return to
SAMPLE mode.
3. Observe the SAMP FLW value. If necessary repeat step 2 to adjust the reading again to
match the desired flow rate.
