Teledyne API Model 200AH NO
X
Analyzer Instruction Manual, 06492, Rev. G2
5-17
Because the span calibration calculation includes zero calibration data and zero calibration
includes span calibration data, the zero and span calibrations can be performed in any order and
the instrument will be accurately calibrated either way.
After every zero or span calibration, it is very important to check the QUALITY of the
calibration. The calibration of the M200AH involves balancing several sections of electronics
and software to achieve an optimum balance of accuracy, noise, linearity and dynamic range.
See Section 7.10 for the calibration quality check procedure.
5.2.2.7. Automatic Converter Efficiency Compensation
The M200AH can automatically compensate the NO
X
and NO
2
readings for the converter
efficiency. There are 2 ways to enter the converter efficiency into the instrument. If the
instrument is in single or independent range modes, there is just one converter efficiency
parameter. If the converter efficiency is determined by some outside method, the efficiency
coefficient can be keyed in as a decimal fraction through the front panel. The path is CAL-
CONC-CONV-SET. The second method is to have the M200AH compute the efficiency using
the CAL-CONC-CON-CAL menu. See the Calibration Section 7.11 - Converter Efficiency for
details.
If AutoRange is enabled there will be 2 converter efficiencies, one for low range and one for
high range. The procedure is identical for each range. To access the converter efficiency menu,
the path is CAL-LOW-CONC-CONV for LOW range and CAL-HIGH-CONC-CONV for HIGH
range. If NO
X
or NO ONLY mode is set, the converter efficiency is disabled with the value set to
1.0000.
To disable the compensation, press CAL-CONV-SET and enter 1.0000 as the efficiency. Factory
default is 1.0000.
5.3. Set-Up Mode
5.3.1. Configuration Information (CFG)
This menu item will tell if the installed software has factory special features or other non-
standard features. If you call Teledyne API service you may be asked for information from this
menu.
5.3.2. Automatic Calibration (AutoCal)
The AutoCal feature allows the M200AH to automatically operate the Zero/Span Valve option.
This option allows a variety of periodic instrument calibrations and calibration checks.
Information on setting up AutoCal is in Section 6.2.
