YOKOGAWA EXAxt ZR402G, User Manual

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<8. Detailed Data Setting>
8-5
IM 11M12A01-04E 11th Edition : Jul. 19, 2017-00
8.1.6 Entering Output Damping Constants
If a measured value adversely affected by a rapid change in the sample gas oxygen
concentration is used for the control means, frequent on-off actions of the output will result. To
avoid this, the converter allows the setting of output damping constants ranging from 0 to 255
seconds.
8.1.7 Selection of Output Mode
You can select a linear or logarithmic output mode. The former provides linear characteristics
between the analog output signal and measured value.
NOTE
When you select logarithmic mode, the minimum output remains constant at 0.1% O
2
, and the
humidity remains set to 0.1% H
2
O and mixing ratio is set to 0.01 kg/kg, regardless of the set
values. Set value of C11 to C16 remains unchanged.
8.1.8 Default Values
When the analyzer is delivered or data are initialized, the output current settings are by default as
shown in Table 8.3.
Table 8.3 Output Current Default Values
Item Default setting
Min. oxygen concentration 0%
O
2
Max. oxygen concentration 25% O
2
Minimum humidity
0%
H
2
O
Maximum humidity
25%
H
2
O
Minimum ratio setting 0 kg/kg
Maximum ratio setting 0.2 kg/kg
Output damping constant 0 (seconds)
Output mode Linear
8.2 Output Hold Setting
The “output hold” functions retain an analog output signal at a preset value during the
equipment’s warm-up time or calibration or if an error arises.
Table 8.4 shows the analog outputs that can be retained and the individual states.
Table 8.4 Analog Output Hold Setting
Equipment status
Output hold
values available
During
warm-up
During
maintenance
During
calibration
Error
occurrence
(*1)
4 mA O
20 mA O
Without hold feature O O O
Retains output from just
before occurrence
O O O
Set value (2.4 to 21.6 mA) O O O O
O: The output hold functions are available.
*1: The output hold functions on error occurrence are unavailable when option code “/C2” or “/C3” (NAMER NE 43 compliant) is
specified.