2 Important Notices on Safety
2-2. Warning cases
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GD-D58 Series
2-2. Warning cases
WARNING
Power supply
Before turning on the detector head, always check that 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 head, check the protective functions for defects. When seeming
defects are found in the protective functions, such as protective grounding, do not start the detector
head.
External connection
Before connecting the detector head to the external control circuit, securely connect it to a
protective grounding circuit.
Zero adjustment in the atmosphere
When the zero adjustment 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.
Do not use the low flow rate alarm function under the presence of silicon.
Silicon may accumulate on the sensing part of the flow sensor, which can result in malfunction.
Do not use the low flow rate alarm function under the presence of corrosive gas
Corrosive gas (chlorine, sulfur, acid, alkaline, halogen) may corrode the flow sensor, which can
result in malfunction.
Do not use the low flow rate alarm function under the presence of high-concentrated gas
Under the presence of high-concentrated combustible gas over the lower explosive limit, the flow
sensor may be overheated, which can result in malfunction.
