5 How to Operate
5-1. How to start the gas monitor
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5
How to Operate
5-1. How to start the gas monitor
Turn on the power switch to start the gas monitor.
(1) The PW/TR LED lamp on the LCD display lights up and the
self-diagnostic function starts.
(2) Verify that the upper level of the ball in the flow monitor indicates
a flow rate of 300
±
25 mL/min. If necessary, use the flow
adjustment valve to adjust the flow rate.
(3) After the reading is stable (about 60 seconds), perform zero
adjustment.
(4) After the zero adjustment is complete, measurement is now
possible.
5-2. How to perform zero adjustment
Holding the control key over the REF CAL. switch on the LCD display for over five seconds or
short-circuiting the terminal plates (5) and (6) for over five seconds will light up the REF CAL lamp and start
the zero adjustment (about 90 seconds).
The zero adjustment of the gas monitor uses fresh air as zero gas. When this function is started, zero gas is
supplied to the sample side to automatically adjust zero. During this operation, 4-20 mA output holds the
last output value before the adjustment.
Perform the zero adjustment at start-up and also during operation as needed.
CAUTION
Do not turn off the gas monitor at start-up (initial clear). Otherwise, a failure may be caused.
CAUTION
Make sure that zero gas is fresh air before performing the zero adjustment.
WARNING
Check the wiring, tubing, and installation for errors.
Make sure that supply power is rated (100 VAC
±
10%).
Power switch
