Yokogawa GD40 Gas Density Detector - Manual (Page 158)

<8. DENSITY / CALIBRATION PROCEDURE>
8-5
IM 11T3E1-01E
8.3.2 Manual Calibration
In this mode of calibration, you visually make sure the reading has settled, and then confirm the
reading manually (by pressing the [ENT] key). There are two ways to switch between the zero,
span and sample gases: by using manually-operated valves or by using solenoid valves. When
switching between the gases using solenoid valves, follow the instructions on valve installation in
Subsection 8.3.1.
[NO]
SEM.CAL
[NO]
VALVE MAN.CAL
X.XXXX
Z_DNS
X.XXXX
WAIT
F0805.ai
[YES]
* 1
ALM.10
ZERO
[YES]
Measurement mode
* 2
* 5
[NO]
X.XXXX
S_DNS
[YES]
* 3
* 6
SPAN
* 4
X.XXXX
CAL.SET
X.XXXX
CAL.SET
[ENT]
[ENT]
[ENT]
[ENT]
[YES] or [NO]
* 3
* 4
[NO]
*1: See "Figure 5.1 Modes of Operational Level" on page 5-8.
*2: If a calibration data error occurs, the display shows [ALM.10].
Pressing the [YES] or [NO] key returns the display to the [MAN.CAL].
*3: Set a desired value by using the [ ], [ ] and [ENT] keys.
*4: When the reading settles, press the [ENT] key to confirm your calibration.
This parameter does not accept input with the [ ] and [ ] keys.
If you press the [MODE] key (for ESCAPE) after this parameter appears, the display shows [WAIT].
The display always shows the corrected density.
*5: Press the [YES] key to go into the measurement mode status after a given stabilization time elapses: Press the [NO]
key to go into the state immediately.
*6: In case of pressing the [NO] key after skipping zero calibration (by pressing [NO] key in the ZERO status), the
analyzer returns to [MAN.CAL].
In case of pressing the [NO] key after finishing zero calibration, the analyzer goes to [WAIT] status.
Zero-point density display
Span-point density display
Figure 8.4 Manual Calibration Mode