Table 5-2 Input Calibration For Range 2 - Honeywell 7866 Operation And Maintenance Manual

Range 2: Hydrogen Percentage Ratio to Carbon Dioxide
Range 2 is used to indicate the percentage of Hydrogen (H
(CO ). When the sensor is exposed to 100 % Carbon Dioxide (0 % H
2
is introduced, the display should progress to 100 %.
Step
Press
1
2 SET UP
3 FUNCTION
4
or
5 FUNCTION
6 FUNCTION
7 FUNCTION
8 FUNCTION
9 FUNCTION
If, after the Zero or Span "live" value has stabilized, no change is made, you should still perform the same key-press
sequences. For example, if in Step 5 you make no change to the displayed value, continue to Step 7 by pressing the
FUNCTION key twice.
9/06 7866 Triple Range Digital H

Table 5-2 Input Calibration for Range 2

Connect the CO source to the sensor.
2
until you see:
Upper Display: CALIBR
Lower Display: RANGE 2
You will see:
Upper Display:
Lower Display:
Select CALIB to begin manual calibration procedure for Range 2.
You will see R2 ZERO in the Lower Display.
The value shown in the Upper Display is a "live" reading. Wait until the value
becomes stable.
Captures the displayed value. The display will blink once indicating that you can
use the or keys to change to the desired zero value. (This ties the internal
counts processed for the input conversion to the desired value for Zero.)
Saves Range 2 ZERO data.
You will see R2 SPAN in the Lower Display.
Connect the H source to the sensor. The value shown in the Upper Display is a
2
"live" reading. Wait until the value becomes stable.
Captures the displayed value. The display will blink once indicating that you can
use the or keys to change to the desired span value. (This ties the internal
counts processed for the input conversion to the desired value for Span.)
Saves Range 2 SPAN data and processes the Range 2 calibration calculation.
and CO Analyzer/Indicator - Operation and Maintenance
2 2
) against a background of Carbon Dioxide
2
), the display should read zero. As H
2
Action
DISABL (default selection)
RANGE 2
Calibration
2
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