YOKOGAWA IR800G, User Manual

Page: 52 / 127

IM 11G06A01-02EN
4-5
4. OPERATION
1st Edition : Oct. 27, 2023-00
● O
2
correction concentration values: Channels (Ch) with “cv” indicate O
2
correction
concentration value of each designated gas
component. The O
2
correction concentration value is
calculated from the following equation, based on which
sampling component is measured, what is the O
2
instantaneous concentration value, and O
2
correction
reference value. (see (1) O
2
correction settings in
5.2.5 Other settings with the following formula.)
Correction formula: C =
21 – O
n
21 – O
s
x C
s
Where
C: Sample gas concentration after O
2
correction
On: Reference O
2
concentration (Value set by application)
Os: Oxygen concentration in exhaust gas (%)
Cs: Concentration of target gas in exhaust gas
However, Os does not take a value higher than the oxygen concentration
limit setting. The upper limit for the fractional part is 4.
Only NO, SO
2
, and CO can be converted.
● O
2
correction concentration average value: Ch (component) and O
2
averages indicated as “Converted ** average” in the component display,
such as “Converted CO average”, are the O
2
-converted concentration
value or O
2
concentration value of the component to be measured,
taken once every 30 seconds, and the O
2
average is the average of
the O
2
-converted concentration value or O
2
concentration value of the
component to be measured, taken once every 30 seconds. The O
2
-
converted average value is averaged over a certain period of time (30
second average of the data acquired once every 30 seconds for 500
ms).
The average time can be set to a variable value from 1 to 59 minutes or
from 1 to 4 hours (the set time is displayed on the range display as “1h”
or similar) using the average time setting (see Section 5.2.1 “Channel
Settings”).
(NOTE) The measurement range of the O
2
-converted concentration value and the O
2
-converted
average value is the same as that of the component to be measured. The measurement
range of the O
2
average is the same as the measurement range of O
2
.
● Range switching There are three range-switching modes: MAN (manual), REM (remote),
and AUT (automatic). in MAN (manual) mode, the range can be switched
by touching the component display area. See 5.2.1 Channel settings for
setting the range switching mode.
In the confirmation dialog that appears after touching, select “Yes” to switch.
Figure 4.4