Teledyne 9110AH - Nitrogen oxides analyzer - Manual (Page 100)

TELEDYNE Model 9110AH NO
X
Analyzer Operator Manual, 01620, Rev. F
7-12
Table 7-10: Converter Efficiency - Automatic Calculation
Step Number Action Comment
1. Preparation Make sure a calibration is completed before setting up
Converter efficiency.
2. Press CAL-
CONC-CON-
NO2 Enter the expected NO
2
concentration, then press ENTR
3. Input a known
concentration of
NO
2
calibration
gas.
Allow reading to stabilize for 10 minutes.
4. Press CAL-ENTR By pressing ENTR the M9110AH will calculate the ratio of
the observed to expected NO
2
and will use that ratio to
compensate future NO
2
readings. The calculated value can be
seen by pressing the SET button.
NOTE:
The CAL button will come on only if the Instrument is
measuring NO
2
gas and ratio is between the limits of
0.80 - 1.20.
5. Press EXIT EXIT will return instrument to SAMPLE mode.
Method 2.
If the converter efficiency is determined by some external means, the value can be directly
entered. Press CAL-CONC-CON-SET, then key in the ratio and press ENTR, then EXIT.
7.11 Recommendations for CEM Applications
7.11.1 Calibration Gasses
The following is our recommendation for calibration gasses and equipment for the M9110AH.
Regulator Specifications:
Ultra high purity, two-stage stainless steel body with stainless steel diaphragms, Tefzel and
Teflon seats and seals, CGA 660 type. Gauges are 0-4000 psig inlet with 0-100 psig outlet.
Nitric Oxide Calibration Gas specifications:
Use NO in nitrogen, EPA protocol 1, NIST traceable (long lead item, order early) for CEMS
Certification Test gas and acid rain applications.