Azbil Micro Flow MQV0002, Руководство пользователя

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3-6
Chapter 3. MOUNTING AND WIRING
„  Piping
CAUTION
Mount this device horizontally. However, do not mount with the display facing down. Doing so
might cause measurement error or device failure.
For the MQV0050(J, K)/0200(J, K)/0500(J, K), use the largest pipe possible in order to reduce
pressure loss in the pipes, and do not install any equipment near the device that can cause
a large pressure loss. If there is a large pressure loss in the pipes or equipment, the pressure
of the gas supply to this device (operation differential pressure) will be affected and will
fluctuate greatly with the flow rate. This could result in unstable control.
When making the pipe connections, hold the hexagonal part of the connector section and turn
the pipe to tighten. After connecting, check that there are no gas leaks.
If using Rc connections, take care not to coat with too much sealant. Foreign matter or burrs in
the pipes may also cause measurement errors.
Handling Precautions
•
Make sure that the gas flows into the device in the direction indicated by the
FLOW arrow on the main unit. Otherwise, the flow rate cannot be controlled
correctly.
•
Do not touch the pipe sections of a controller treated to be oil-free with your
bare hands. Doing so will degrade the oil-free treatment.
FLOW
Gas Gas
•
Do not hold the top part of the main unit with your hand when connecting
piping. Doing so might deform the case.
Fasten and connect pipes to the body using a wrench (spanner) or similar tool on
the hexagonal sections of the joints.
„ z
Coating sealant (Rc connection)
Handling Precautions
•
Coat with an appropriate amount of sealant. Do not coat the top two
threads. Remove any dirt or burrs from inside the pipes.
Correct
Incorrect
Sealant
Sealant