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7
Chapter 3. Mounting and Wiring
CAUTION
Observe the following when using this flowmeter for oxygen gas:
• Piping should be done by a specialist experienced in handling oxygen gas, observing
general precautions related to oxygen gas.
• Use degreased pipes and parts.
• Be sure to remove foreign matter, burrs, etc. from the pipes before connecting this flow-
meter.
Do not remove the resin cover and disassemble the piping connector part. Doing so could
cause damage.
When carrying or installing this device, never hold it by the resin cover.
Doing so could damage the cover, or the device could slip and fall, causing an injury.
Installation
z
Installation location
Avoid installing the device where it will be subject to conditions such
as the following.
• Ambient temperature colder than -10 ˚C or hotter than 60 °C
• Humidity higher than 90 % RH
• Sudden temperature fluctuations causing dew condensation
• Corrosive gas or flammable gas atmosphere
• Large amounts of dust, salt, iron powder or other conductive sub-
stances, water droplets, oil mist, or organic solvents
• Direct vibration or shock
• Direct sunlight
• Water or rain
• Splashing by fluids (e.g. oil, chemicals)
• Strong magnetic or electrical field
Behavior when the flow rate greatly exceeds the measurement range
If the flow rate exceeds the high limit for measurement, the cor-
rect value may not be displayed or output. Be sure to use the device
within the measurement range stated in the specifications.
If the flow rate exceeds 120 % of the high limit, the display alternately
shows the flow rate and
ALH1
. If the flow rate increases further, the
display does not show
ALH1
, but shows lower values than the actual
flow rate. Note that if the flow rate suddenly becomes excessive,
ALH1
may not be displayed. Especially when this device is used for flow
control, make sure to take appropriate measures, such as controlling
the supply pressure or using a throttle valve, so that even at maxi-
mum control output (100 %), the flow rate does not exceed 120 % of
the high limit of the range.
Flow rate
Flow rate
indication
Flow rate indication
Flow rate indication
High limit
120 % of high limit
Display
Flow rate
range
Flow rate and
ALH
1
alternately
Содержание Micro Flow CMS 0200
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