YOKOGAWA IR400 series, User Manual

Page: 82 / 121

<6. SETTING AND CALIBRATION>
6-41
IM 11G02N01-01E
Caution
To close “Span Calibration”
6.9.2 Span calibration
It is used to perform a span point adjustment. Supply calibration gas with concentration set to the
span value to perform the span calibration. For the span calibration gas for the NO
X
, SO
2
, CO
2
, CO
measurement, use the standard gas with a concentration of 90% or more of the range value.
For the span calibration gas for the O
2
measurement, use the standard gas with a concentration of 90
% or more of the range value when measuring with the built-in O
2
sensor, and use the standard gas of
1 to 2 vol% when measuring with an external zirconia O
2
sensor.
ENT
( )
ENT
To Measurement screen after
executing Manual Span Calibration
SPAN
F6_9_2.ai
ENT
( )
(1) Press the
SPAN
key on the Measurement
screen to display the Manual Span Calibration
screen.
(2) Select Ch (component) to be calibrated by
pressing the or key and press the
ENT
key.
The calibration gas is supplied.
When “both” from “Calibration Range” of the
Calibration Setting mode is set, span calibration
is performed together with 2 Ranges.
(3) Wait until the indication is stabilized in the
state where the calibration gas is supplied.
After the indication has been stabilized,
press the
ENT
key. Span calibration of
Range selected by the cursor is performed.
Note: For the Ch (component) for which“AR” is selected in
“6.1.1 Setting range switch mode,” the cursor
automatically moves to the range selected in “Setting
of auto calibration component/range” (6.2.4), and
calibration is carried out within that range.
To close the “Span Calibration” or cancel
this mode midway, press the
ESC
key.
A previous screen will return.