YOKOGAWA ZR22G User Manual page 201

(1)
Figure 10.32 Flow of span gas (air)
(2) Next, adjust the flow rate to 600 ± 60 ml/min using the span gas valve "AIR" (the flow check
ball stops floating on the green line when the valve is slowly opened). To rotate the valve
shaft, loosen the lock nut and turn it using a flat-blade screwdriver. Turning the valve shaft
counterclockwise increases the flow rate.
(3) After adjusting the flow rate, tighten the valve lock nut.
(4) Select "Valve opened" (to start calibration) from the Manual calibration display shown in
Figure 10.15. Check the Trend graph display to see that the measured value is stabilized.
Then press the [Enter] key. The Manual calibration display shown in Figure 10.16 appears.
Disconnect the power cord to stop the pump.
<Flow of zero gas>
Feeds zero gas by following the instruction on the converter.
Figure 10.33 Flow of zero gas
(1) Use the needle of the zero gas valve " CHECK GAS " to puncture a hole in the gas cylinder
installed as described in Section "10.11.2 Installing Gas Cylinders". Fully clockwise turn
the valve regulator by hand.
(2) Next, adjust the flow rate to 600 ± 60 ml/min (the flow check ball stops floating on the green
line when the valve is slowly opened). Turn the regulator of the zero gas valves back slowly
counterclockwise. At that time, the flow rate also decreases as the inner pressure of the gas
cylinder decreases. Therefore, monitor the flow check and, when the ball's position changes
greatly, readjust the valve.
(3) Select "Valve opened" (to start calibration) from the Manual calibration display. Check the
Trend graph display to see that the measured value is stabilized. Then press the [Enter] key.
The Manual calibration display shown in Figure 10.18 appears. Then stop the zero gas flow
immediately. Turn the zero gas valve regulator fully clockwise. If this valve regulator is not
properly adjusted, the needle valve will not close completely and a cylinder gas may leak.
<10. Other Functions>
(2)
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
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