YOKOGAWA EXAxt ZR22G, Руководство пользователя, Страница: 117 / 211

<8. Detailed Data Setting>
8-4
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
8.1.4 Setting Output Smoothing Coefficient
When the oxygen concentration in the sample gas fluctuates rapidly, if the measured value is
used for control this can lead to problems with undesirable frequent ON/OFF switching. You can
set a smoothing time constant of between 0 and 255 seconds to reduce the effect. Select the
appropriate output damping constant from the numeric-data entry display. To set 30 seconds,
enter 030.
8.1.5 Selection of Output Mode
You can select whether the relationship between the sample oxygen concentration and the
analog output signal be linear or logarithmic. Press the [Enter] key in the output mode display. A
linear/ logarithmic selection display then appears. Select the desired mode.
NOTE
If you select an output mode of “logarithmic” then regardless of range setting the minimum output
value becomes 0.1 vol%O
2
(humidity; 0.1% H
2
O, mixing ratio; 0.01 kg/kg) fixed.
8.1.6 Default Values
When the analyzer is delivered or reset to defaults, the output current default settings by as
shown in Table 8.1.
Table 8.1 Output Current Default Values
Item Default setting
Min. oxygen concentration 0 vol%O
2
Max. oxygen concentration 25 vol%O
2
Minimum humidity conc. 0 % H
2
O
Maximum humidity conc. 25 % H
2
O
Minimum mixing ratio 0.000 kg/kg
Maximum mixing ratio 0.200 kg/kg
Output damping constant 0 (seconds)
Output mode Linear
8.2 Output Hold Setting
The “output hold” functions hold an analog output signal at a preset value during the equipment’s
warm-up time or calibration or if an error arises. Outputs 1 and 2 can not be set individually. Table
8.2 shows the analog outputs that can be retained and the individual states.
Table 8.2
Equipment status
Output
hold values available
During warm-up
Under
maintenance
Under calibration
During blow back
On Error
occurrence(*1)
4 mA
○
20 mA
○
Without hold feature
○ ○ ○
Retains output from just before
occurrence
○ ○ ○
Set value (2.4 to 21.6 mA)
○ ○ ○ ○
○
: 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.