RKI Instruments GD-70D Series - Manual (Page 4)

Important Notices on Safety
GD-70 - 4 -
Important Notices on Safety
<Definition of DANGER, WARNING, CAUTION, and NOTE>
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury or serious damage to the product.
The use of this symbol is to be limited to the most extreme situation.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury on the human body or object.
CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury or some damage on the human body or objects. It
may also be used to alert against unsafe practices.
NOTE This means "ADVICE" at operation.
<Danger cases>
DANGER
This is not an explosion-proof device. You must not use it to detect gases exceeding the lower limit of explosion.
<Warning cases>
WARNING
Power Supply
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 seeming defects are found in the
protective functions, such as protective grounding, do not start the detector.
External connection
Before connecting the detector to external equipments or external control circuit, securely connect it to a
protective grounding circuit.
Tubing
The detector is designed to suck gases around it under the atmospheric pressure. If excessive pressure is applied
to the sampling inlet and outlet (GAS IN, GAS OUT) of the detector, detected gases which may be leaked from its
inside pose dangers. Be sure that excessive pressure is not applied to the detector when it is used. Detected
gases must be exhausted from the detected gas exhausting outlet (GAS OUT) on the bottom of the detector to
which an exhaust tube is connected, to a point regarded as a safe place.
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, while it may cause blindness if
its contacts eyes. If electrolyte is adhered on you clothes, that part on your clothes is discolored or its material is
decomposed. 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, thus leading to dangers when the gas leaks.
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.