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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
8.1 Manual Zero/Span Check or Calibration Through the
Sample Port
The zero and span calibration of the instrument can be checked or adjusted using gases supplied
through the normal sample port. This method is often used when the calibration gas is supplied
from an external calibrator system.
This mode provides a calibration mechanism if the instrument is purchased without the
Zero/Span Valve option.
Since the zero gas concentration is defined as 0 PPM, it is not necessary to enter the expected
zero value. Table 8-2 details the zero calibrate procedure with zero gas coming in through the
sample port.
Table 8-2: Manual Zero Calibration Procedure - Zero Gas Through Sample Port
Step Number Action Comment
1. Press CAL The M100AH enters the calibrate mode from sample mode.
The zero gas must come in through the sample port. If
AutoRange is enabled, then select LO or HI range and press
ENTR.
2. Wait 10 min Wait for reading to stabilize at zero value
3. Press ZERO If you change your mind after pressing ZERO, you can still
press EXIT here without zeroing the instrument.
4. Press ENTR Pressing ENTR actually changes the calculation equations.
5. Press EXIT M100AH returns to sampling. Immediately after calibration,
data is not added to the DAS averages.
If the instrument will be used on more than one range such as AUTO RANGE or DUAL
RANGE, it should be calibrated separately on each applicable range (see Section 8.6 for
calibration procedure).
8-3