GD-70D - 6 -
2
Important Notices on Safety
2-1 Danger Statements
DANGER
This is not an explosion-proof device. You must not use it to detect gases exceeding the lower limit of explosion.
2-2 Warning Statements
WARNING
Before turning on the detector, always check whether the voltage is properly applied. Do not use an unstable
power supply because it may cause malfunctions.
Need of grounding circuit
Do not cut the grounding circuit or disconnect the wire from the grounding terminal.
Defects in protective functions
Before starting the detector, check the protective functions for defects. When defects are found in the protective
functions, such as protective grounding, do not start the detector.
External connection
Before connecting the detector to external equipment or an external control circuit, securely connect it to a
protective grounding circuit.
Tubing
The detector is designed to draw gases around it under normal atmospheric pressure. If excessive pressure is
applied to the sampling inlet and outlet (GAS IN, GAS OUT) of the detector, detected gases may leak from the
flow system and pose dangers. Be sure that excessive pressure is not applied to the detector when it is used.
Detected gases must be exhausted from the outlet (GAS OUT) on the bottom of the detector to a safe place
using an exhaust tube.
Handling the sensor unit
Do not disassemble the electrochemical type sensor unit (ESU) or galvanic cell type sensor unit (OSU) because
they contain electrolyte. Electrolyte may cause severe skin burns if it contacts skin and may cause blindness if it
contacts eyes. It may discolor or damage clothing. If contact occurs, rinse the area immediately with a large
quantity of water.
Zero adjustment (AIR Adjustment) in the atmosphere
When zero adjustment (AIR Adjustment for oxygen deficiency alarm) is performed in the atmosphere, check the
atmosphere for freshness before beginning the adjustment. If other gases exist, the adjustment cannot be
performed properly and the detector will not properly detect gas.
Operation in a gas
Do not operate the detector in a place where flammable/explosive gases or vapors are present. Operating the
detector in such an environment will lead to extreme dangers.
Response to a gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on your judgment.
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