Teledyne 9110AH - Nitrogen oxides analyzer - Manual (Page 21)

TELEDYNE Model 9110AH NO
X
Analyzer Operator Manual, 01620, Rev. F
2-8
Step 2 - Calibrate the instrument:
Zero/Span Calibration Procedure
Step Number Action Comment
1. Input Zero gas Allow Zero gas to enter the sample port on the rear of the
instrument.
2. Press CAL The M9110AH enters the calibrate mode from sample mode.
3. Wait 10 min Wait for reading to stabilize at the zero value. If you wait less
than 10 minutes the final zero value may drift.
4. Press ZERO The ZERO button will be displayed.
5. Press ENTR Pressing ENTR actually changes the equations and zeros the
instrument.
6. Press EXIT, input
Span gas M9110AH returns to the CAL menu. Now switch gas streams
to span gas.
7. Wait 10 min Wait for reading to stabilize at the span value.
8. Press SPAN The SPAN button should be displayed. If there is no SPAN
button check the Troubleshooting Section 9.2.8 for
instructions on how to proceed. In certain circumstances at
low span gas concentrations both the ZERO and SPAN
buttons will appear.
9. Press ENTR Pressing ENTR actually changes the equations so that the
concentration displayed is the same as the expected span
concentration you entered above, thus spanning the instrument.
10. Press EXIT Pressing EXIT returns the instrument to SAMPLE mode.