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7. Connect a source of calibration gas to the SAMPLE bulkhead. The
calibration gas should be approximately 80% of the high full-scale
range.
8. To ensure that the calibration gas is being measured at atmospheric
pressure, check that the flow reported by the analyzer is approximately
0.8 LPM. Actual sample flow should be 0.8 LPM or more, with the
excess flowing out the atmospheric bypass.
9. Sample the calibration gas and wait for the instrument reading to
stabilize.
10. Use
to move the cursor to Calibrate HI SO2, and press
to display the Calibrate HI SO
The first line of the display shows the current SO
line of the display is where you enter the high calibration gas
concentration.
11. To enter the high calibration gas concentration, use
move the cursor left and right. Use
decrement the digit. Press
SO2 calibration gas.
The display flashes the message "SAVING", and the corrected SO
reading is displayed.
12. Press
to return to the Calibration menu. If using a chart
recorder, the SO
recorder response will equal:
2
Where:
URL = upper range limit of the instrument's operating range
Z
= instrument response to zero air, % full scale
SO2
13. Generate five SO
2
concentration above.
14. Record instrument reading for each concentration after allowing time
for both gas generation system and instrument to stabilize.
Multipoint Calibration in Dual/Auto Range Mode
screen.
2
to calibrate the instrument to the high
[
]
SO
2
OUT
x
100
+
URL
concentrations equally spaced between zero and the
Model 43i Trace Level-Enhanced Instruction Manual
Calibration
reading. The second
2
to increment and
Z
SO
2
to
2
4-9
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Troubleshooting
