Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 129)

<10. Other Functions>
10-20
IM 11M12A01-04E
Table 10.9
Sample gas pressure, (kPa) 50 100 150 200 250
Flow rate, (ml/min) 500 430 380 350 320
(3) Adjust the flow rate. After the measured oxygen concentration is stabilized, touch the [ENT] key,
then all the digits will flash. Touch the [ENT] key again to flash “CAL End.”
(4) Close the zero gas flow setting valve to stop the zero gas flow. Be sure to tighten the lock
nut if the valve shaft has a lock nut to prevent any leakage of zero gas into the sensor during
measurement. When the stabilization time elapses, the zero calibration will be complete.
10.6.4 Treatment After Calibration
No special treatment of the instrument is needed after calibration. However, it is recommended that
the pressure regulator for the zero gas cylinders be closed because calibration is not required so
often.