2-3
2-2 Selection Criteria for Installation Location
The device is designed to withstand severe conditions, but the installation location should
be selected according to the criteria described below to maximize performance.
2-2-1 Selection Criteria for Installation Location
Install the device in a location that satisfies all of the following conditions.
• Operating temperature range that conforms to the explosion protection rules
• Relative humidity: 5 to 100%RH
• Ambient temperature change rate: ±20°C/hr or slower
• Electromagnetic induction: 400 A/m or less (Avoid places near a large transducer,
high-frequency furnace, or other such equipment.)
• Do not use a transceiver near the device.
• Vibration: 20 m/s
2
(5 to 400 Hz) or less
(The vibration conditions defined for the device are the vibrations at the positioner
part.)
2-2-2 Criteria for instrumentation air
The device employs a nozzle flapper structure in the electropneumatic transduction
section. If instrumentation air is contaminated (includes oil, water, or other substance),
the positioner function of the device may not function properly or an irrecoverable failure
may occur. Therefore, the quality of instrumentation air supplied to the device is defined
as follows.
• Solid material : No particles with a diameter larger than 3 μm.
• Oil : Less than 1 ppm.
• Supply air humidity : The dew point temperature is at least 10°C lower than that of the device.
(This criterion is based on Japanese Industrial Standards JIS C 1805-1(2001).)
Select a compressor and main line or terminal-installation type compressed air purifier by
referring to the above specifications.
(1) Compressed air purifier for the main line
Select a compressed air purifier for the main line, such as a main line filter or micro-
alescer, to satisfy the above specifications.
Domestic compressed air purifier manufacturers of Japan: SMC Corporation and CKD
Corporation
(2) Compressed air purifier to be installed on the terminal
If an air purifier cannot be installed on the main line due to installation of a control
valve or for other reasons, use an compressed air purifier that can be installed on the
terminal in order to satisfy the above specifications.
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