SAFETY CAUTIONS
iii
Operating environment
Do not connect the sensor head to a test object of which pressure is in excess of
atmospheric pressure. If the pressure in the sensor he
ad exceeds atmospheric
pressure, the sensor head will be damaged or it will pop out from the connector,
causing injury to the surrounding, including human body. If the pressure exceeds
atmospheric pressure, provide an isolation valve so that the pressure
in the sensor
head does not exceed atmospheric pressure.
Operating environment
Do not use the gauge in a place where it may be splashed with water. If it is
splashed with water, failure, earth leakage or fire can result.
Do not plug the
air vents of the vacuum gauge controller. If the air vents are
plugged, heat will be contained inside and the gauge may be damaged.
Keep out foreign matter.
If foreign matter like metal fragments or combustibles are admitted into the
vacuum gauge throu
gh the air vents or other openings, remove them. Otherwise,
the vacuum gauge may be damaged.
Operate the vacuum gauge under the environment set forth in the specifications.
If the vacuum gauge is to be shi
pped to other site, repack it in the same way as on
delivery. If the gauge is shipped bare, it may be damaged.
When discarding the vacuum gauge, comply with your local regulations. If the
gauge was used in an environment that can cause hazards to human body, have
it disposed of by an authorized specialist in disposal.
Customer shall be responsible for the cost relating to disinstallation.
Meter panel
Don’t long contact with chemical cleaning cloth, don’t wipe with benzene or
thinner. The pointer may become unstable due to static electricity. In the case,
apply a commercially available antistatic agent to the cover.
The contact output capacity is 100VAC/0.5A, 24VDC/1A (resistance load).
If power higher than this is opened/closed, do not use the contact of the vacuum
gauge, but use a large capacity switch in conjunction.
Aluminum electrolytic capacitor is used for the electric circuit in the sensor unit.
Generally, the life expectancy of the aluminum electrolytic
capacity is limited
and the higher the surrounding temperature, the shorter the life. It is
recommended to replace the aluminum electrolytic capacitor once every five
years or at the time or repair or overhaul to prevent components from being
damaged.
Lifetime of sensor head cable and connector
Female connector is used in the sensor head cable and detection unit. This
female connector has a lifetime. A large current load may cause a fire in the
connector connection area. Avoid the frequent insert/remove
of connector to
prevent a heavy load and loosens of the connector connection.
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