YOKOGAWA av550g, Руководство пользователя

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< 10. Other Functions >
10-29
IM 11M12D01-01E
Table 10.7 Initialization Parameters and Defaults -part 3
Item Initialization Parameter Default
Others
Averaging
Averaging interval 1 hour
Max/Min Average monitoring Interval 24 hours
Fuel Setup
Moisture content in exhaust gas 0.00 m
3
/kg (m
3
)
Theoretical air volume 1.00 m
3
/kg (m
3
)
X value 1.00
Absolute humidity of outside atmosphere 0.0000 kg/kg
Detector type ZR22G
Sample gas selection Wet
Units °C
Asymmetry alarm Disable
Averaging group setting All ON
Purging time 0 min. (disabled)
Clock Not affected
Channel card power
All installed cards are
enabled
10.8 Methods of Operating Valves in the ZA8F Flow
Setting Unit
The ZA8F Flow Setting Unit is used for manual calibration as described in Subsection 1.1.1.
Calibration in such a system is to be manually operated. So, you have to operate the valve of the Flow
Setting Unit each time calibration is made (starting and stopping the calibration gas flow and adjusting
the flow rate). For operation of the Averaging converter, see Section 7.9 Calibration, earlier in this
manual.
10.8.1 Preparation Before Calibration
To operate the ZA8F Flow Setting Unit, prepare for calibration as follows:
(1) Check for a complete closing of the zero gas flow setting valve in the unit and open the regulator
valve for the zero gas cylinder until the secondary pressure equals sample gas pr
approx. 50 kPa (or sample gas pressure plus approx. 150 kPa when a check valve is used,
maximum pressure rating is 300 kPa).
(2) Check that the oxygen concentration of the zero gas and span gas (instrument air 21 vol% O
2
) in
the cylinder is set in the Averaging converter.
10.8.2 Operating the Span Gas Flow Setting Valve
The following description is given assuming that instrument air, the same as the reference gas, is used
as the span gas.
(1) When the display shown in Figure 10.33 appears during calibration, open the span gas flow
setting valve of the flow setting unit and adjust the flow rate to 600 ± 60 ml/min. Turn the valve
slowly counterclockwise after loosening the lock nut if the valve has a lock nut. To check the flow
rate, use the calibration flowmeter.
If the measurement gas pressure is extremely high, adjust the measurement gas pressure to
obtain pressures (Refer to Table 10.8) ± 10%.
Table 10.8
Measurement gas pressure (kPa)
50 100 150 200 250
Flowrate (ml/min)
500 430 380 350 320