Yokogawa GD40 Gas Density Detector - Manual (Page 168)

<10. HYDROGEN PURITY / CALIBRATION PROCEDURE>
10-1
IM 11T3E1-01E
10. HYDROGEN PURITY /CALIBRATION
PROCEDURE
This chapter describes how to calibrate of Hydrogen purity meter.
If select Density meter, see Chapter 8.
If select Calorie meter, see Chapter 9.
Zero and span calibration can be carried out using standard gases (zero and span gases). The
analyzer uses hydrogen (100%) as the zero gas and carbon dioxide (100%) as the span gas.
The analyzer is designed so that calibration is done manually. The basic calibration procedures
and operations are as follows.
10.1 Basic Calibration Procedure
Operation level
Manual calibration mode
See the Process in Figure 7.2.
See the Process in Figure 10.2.
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10.2 Preparation for Calibration
Prepare for calibration during the initial operation of the analyzer by entering manual calibration
at the operation level.
[NO]
*SERVC
[NO] [NO]
*RANGE
[NO]
*ALARM *CAL.DT
X
*C_HLD
XXX.X
*PR.SET
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[YES]
* 3
*1: See "Figure 7.4 Process at the Setting Level" on page 7-10.
*2: Set a value using the [ ], [ ] and [ENT] keys.
If you enter a value that exceeds the limits, the display shows [*OVER].
Press the [YES] or [NO] key to re-set the value.
*3: This step is skipped if the parameter [*C_HLD] is set to a value other than "2".
* 1
[ENT]
[ENT]
* 2
(Setting of output hold value
during calibration)
(Setting of preset value)
* 2
Figure 10.1 Calibration Parameter Setting Mode