Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 134)

IM 11M12D01-01E 8-8
8.1.3 Setting Output Smoothing Coefficient (Applies to All Analog Outputs)
When the oxygen concentration in the measured 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. A single time constant setting applies to all analog outputs.
<Setting Procedure>
1) From "mA-output setup" on the Commissioning display, select "Output damping" and
touch the Enter key. A numerical data entry display is displayed.
2) To set 30 sec., enter 030 and touch the Enter key.
<Default setting>
Factory default setting is 0 sec. (no smoothing).
8.1.4 Setting Output Mode (Applies to All Analog Outputs)
You can select whether the relationship between the measured oxygen concentration and
the analog output signal be linear or logarithmic. The same setting applies to all analog
outputs.
<Setting Procedure>
1) From "mA-output setup" on the Commissioning display, select "Output Mode" and
touch the Enter key.
2) A selection window appears, allowing you to select Linear or Log. Touch the Enter
key to confirm.
<Default setting>
Output mode is set to linear prior factory shipment or after data initialization.
CAUTION
If you select an output mode of "logarithmic" then regardless of range setting the
minimum output value becomes 0.1% O
2
fixed.