Chapter 3. INSTALLATION, MOUNTING, WIRING
WARNING
If this device is used with flammable gases such as natural gas, propane or butane, mount it on
the upstream side of the safety shutoff valve. When air gets in the pipe and an explosive mixture is
produced, and if a sensor should make a spark due to lightning or other reasons, the mixture may
explode inside the pipe.
The mass of this device is 7 to 23 kg according to the model number.
Ensure to take complete precautions and care while handling for transportation or installation.
For safe handling, two or more persons are required while handling this device.
Accidental dropping of the device on the foot might cause injury.
Do not hold the device by the converter alone.
Doing so might damage the device, or the pipe connector section may drop off.
Do not use this device or its installed pipes as a scaffolding.
Doing so might damage the device or the pipe, or might cause physical injury.
Do not disassemble this device.
If it is disassembled when pressure remains in the pipes, the device could be damaged or someone
could be injured by flying parts.
CAUTION
Be sure to use this device for a flow not exceeding 36m/s, the maximum measurable velocity. To pre-
vent excessive flow, use a suitable means to control the supply pressure or use a throttle valve or the
like to control the flowrate. If the velocity exceeds the maximum measurable velocity, both the flow-
rate display and the output voltage/current may indicate considerably lower values than the actual
flowrate. Refer to;
Behavior when the flowrate greatly exceeds the upper limit of flowrate (page 7).
If damage could result from the abnormal functioning of this device include appropriate redun-
dancy in the system design.
Prevent foreign matter from entering the device.
If the rust, water droplet, oil mist or dust in the piping flows into the device, measurement error
might occur and result in damaging the device.
If there is a possibility that any foreign matter flows into the device, provide a filter, strainer or mist
trap capable of eliminating more than 1μm foreign matter at the upstream, and periodically inspect
and replace the filter.
This device is a precision instrument.
Do not drop it nor subject it to shock. Doing so might damage the device.
When mounting the device, firmly fasten to prevent vibration.
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