Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 89)

NDIR Gas Analyzer Settings and Calibration
Teledyne Analytical Instruments 73
6.8 Calibration
6.8.1 Zero Calibration
This function is used for the zero
point adjustment. A proper zero gas,
suitable for the application, should be
used. Refer to section 3.4 “Sampling”.
1. From the Measurement screen,
press the ZERO key to display the
Manual Zero Calibration screen.
2. Select the Ch (component) to be
calibrated using the UP or DOWN
key and then press the ENT key,
and zero gas will be admitted to
the analyzer.
Note: For the Ch (components)
where “both” is set in the
calibration range setting ( see
section 6.2.3), zero calibration
is carried out on both ranges.
3. Wait until the indication stabilizes
on the zero gas then press ENT.
The zero calibration will be carried
out on the highlighted range(s).
Note: On Ch (components) for which
“AR” is set (see Section 6.1.1
Setting Range Switch Mode),
the cursor automatically moves
to the next range selected in
“Setting of Auto Calibration
Component/Range” (6.2.4),
and calibration is carried out
on that range.
To close the Zero Calibration screen
or to abort the entry midway, press the
ESC key. The previous screen will return.