Riken Keiki GD-F4A-SC-A, Operating Manual

Page: 15 / 26

12
５．HOW TO OPERATE
５－１．Preparation for start up
Before making power on, take care of the following. If do not keep this, there is the danger
of electrical shock and damage of instrument.
５－２．How to start the detector head
① This detector head does not equip a power switch. Analog outputs of oxygen sensor
are converted to 4-20mA and transmitted to the indicator/alarm unit directory
through the connected cable. As far as the cable has been connected correctly, this
system starts operation by putting on the power switch in indicator/alarm unit.
② Let the gas flow be sampled to this unit by turning on the pump switch etc.
③ Adjust the flowrate to lead sampled gas to 1.0L±0.3mL/min.
④ Be sure to perform gas calibration at the time of new installation. Correct reading
may not be obtained before gas calibration.
５－３．How to exit
① Stop the sample gas supply to this unit by turning off the pump switch, etc.
② This system stops operation by putting off the power in indicator/alarm unit, since this
unit has no power switch.
・ Make protective grounding.
・ Check that the wiring with outer unit is made correctly.
・ Check that the supply voltage is within the rating.
・ Check that the rated fuse is used.
WARNING
・At the new installation, adjust the reading in indicator/alarm unit according to
“
6-2.
Calibration
”
.
CAUTION
！