Teledyne API Model 200AH NO
X
Analyzer Instruction Manual, 06492, Rev. G2
7-7
Table 7-6: Manual O
2
Span Calibration Procedure - Span Gas Thru Sample Port
Step Number Action Comment
1. Press
CAL-O2-CONC
This key sequence causes the M200AH to prompt for the
expected O
2
concentration.
Enter the O
2
span concentration value by pressing the key
under each digit until the expected value is set.
2. Press ENTR Pressing ENTR stores the O
2
span value and returns the
prompt to the CAL menu.
3. Wait 10 min Wait for reading to stabilize at span value.
4. Press SPAN If you change your mind after pressing SPAN, you can still
press EXIT here without spanning the instrument.
5. Press ENTR Pressing ENTR actually changes the calculation equations
and causes the instrument to read the expected O
2
span
concentration.
6. Press EXIT M200AH returns to sampling. Immediately after calibration,
data is not added to the DAS averages.
7.3. Manual Zero/Span Check with Zero/Span Valves
Option
The Zero/Span valve option can be operated from the front panel keyboard as described below.
The Zero/Span valves allow zero and span gas come in through ports on the rear panel of the
instrument. The Zero/Span valves can be set up to operate automatically on a periodic schedule.
See Section 6.2 to setup automatic zero/span feature.
