YOKOGAWA IR800G, User Manual

Page: 95 / 127

IM 11G06A01-02EN
5-40
5. SCREENS
1st Edition : Oct. 27, 2023-00
5.4.2 Manual span calibration
Used to manually adjust the span point. Perform span calibration by flowing the calibration gas of
the concentration set as the span gas concentration; for NOx, SO
2
, CO
2
, and CO meters, use a
standard gas with a concentration of 90% or more of the range value as the span calibration gas.
For O
2
analyzers, use a standard gas with a concentration of 90% or more of the range value for
built-in magnetic O
2
analyzers, and a standard gas with a concentration of around 1 to 2 vol% for
zirconia O
2
analyzers.
(1) Tap on the Home/Main screen > Calibration
(2) Tap the to select the span calibration of the Ch (component) to be
calibrated. The calibration confirmation screen will be displayed.
CAUTION
• In the Calibration screen, except for the replacement time in progress
screen, the range, measured value, and units are always displayed in
the calibration range, regardless of the range that was displayed in the
measurement screen.
• When the unit of Ch (component) is mg/m
3
or g/m
3
, the unit of gas
concentration is displayed together with ppm.
Calibration menu
(3) Confirm the calibration contents on the screen that appears. After verifying
that there are no problems, tap the "Next" button. For the operation of the
contact output when the solenoid valve is operated with the contact output
for automatic calibration, see ● Contact output during manual span
calibration The Calibration start screen appears.
(4) If you operate the valve manually, open the valve here to allow the
proper flow rate to apply. For the valve to be operated, see ● Contact
output during manual span calibration and operate the same valve that
is operated by the contact output. Then tap the [Start calibration]. The
calibration execution screen will be displayed.
(5) Wait for the indicated value to stabilize with the span gas flowing. After
stabilization, tap the "Enter" to perform span calibration. After calibration
is performed, if the solenoid valve of the span gas is operated by contact
output for automatic calibration, the span gas stops here. The calibration
end screen is displayed.