Yokogawa IR400 - Manual (Page 37)

5 - 4
IM 11G02N01-01E
(2) Setting/selection screen
The setting/selection screen is configured as shown below:
• In the status display area, the current status is displayed.
• In the message display area, messages associated with operation are displayed.
• In the setting item and selection item display area, items or values to be set are displayed,
as required. To work on the area, move the cursor to any item by using
, and
keys.
Cursor
Status display area
• LCD screen
Message display area
Setting item/selection item
display area
Fig. 5-4
•
Instantaneous value and concentration value:
The concentration display of Ch (component) where sampling components such as “CO
2
”, “CO”
or “O
2
are displayed in the component display, indicates current concentration values of the
measured components contained in gas that is now under measurement.
•
O
2
correction concentration values:
Ch components where “cv**” is displayed as “cv CO” in the component display are calculated
from the following equation, by setting sampling components, O
2
instantaneous/concentration
values and O
2
correction reference value (see item 6.8).
Correction output=
The converted sampling components are NO
X
, SO
2
and CO only.
•••••
O
2
correction concentration average value:
In the Ch (component) and O
2
average value where “ **” is displayed as “ CO” in the
component display, a value obtained by averaging O
2
correction concentration value or O
2
average value in a fixed time is output every 30 seconds.
Averaging time can be changed between 1 minute and 59 minutes or 1 hour and 4 hours accord-
ing to the average time settings (See 6.7, Parameter setting).
(The set time is displayed as “1h” , for instance, in the range display.)
* The measurement ranges of O
2
correction concentration value and O
2
correction concentra-
tion average value are the same as that of the measuring components. Also, the measure-
ment range of O
2
average value is the same as that of O
2
.
CV
AV CV
AV
On:The value of the O
2
correction referance value
(Value set by application)
Os: Oxygen concentration (%)
Cs: Concentration of relevant measured component.
Note that Os does not exceed the O
2
limit value
21 - On
21 - Os
×
Cs