Toshiba LF600F - Manual (Page 8)

TOSHIBA
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Handling Precautions (continued)
(5) If the inside of the converter or cable terminals are wetted or humidified, it may cause
insulation deterioration, which can result in fault or noise occurrence. So do not conduct
wiring in the open air on rainy days.
Also, be careful not to wet down the converter even in the case of indoor wiring, and
complete wiring work in a short period of time.
(6) Observe the following precautions when you open the converter housing cover:
• Do not open the cover in the open air unprotected against rain or wind. This can
cause electric shock or cause damage to the flowmeter electronics.
• Do not open the cover under high ambient temperature or high humidity
conditions or in corrosive atmospheres. This can cause deterioration of system
accuracy or cause damage to the flowmeter electronics.
(7) Since a varistor is built in converter, do not conduct a withstand voltage test for the
converter.
In addition, the voltage for checking the insulation of the converter must be 250VDC
or lower.
(8) This product may cause interference to radio and television sets if they are used near
the installation site. Use metal conduits etc. for cables to prevent this interference.
(9) Radio transmitters such as transceivers or cellular phones may cause interference to the
flowmeter if they are used near the installation site. Observe the following precautions
when using them:
• Close a transmitter cover before using a transceiver.
• Do not use a transceiver whose output power is more than 5 W.
• Move the antenna of a transceiver or a cellular phone at least 50 cm away from the
flowmeter and signal cables when using it.
• Do not use a radio transmitter or a cellular phone near the flowmeter while it is
operating online. The transmitter or cellular phone’s output impulse noise may interfere
with the flowmeter.
• Do not install a radio transmitter antenna near the flowmeter and signal cables.
(10) For reasons of flowmeter failure, inappropriate parameters, unsuitable cable
connections or poor installation conditions, the flowmeter may not operate properly.
To prevent any of these problems causing a system failure, it is recommended that
you have preventive measures designed and installed on the flowmeter signal
receiving side.
(11) For piping and installation of the combined detector, check the model number of
detector and read the instruction manual of the relevant detector.
We assume no responsibility for nonconformity caused by violation of precautions described
in this manual or used in violation of the installation method and the operation method
stipulated in a relevant ordinance or other regulations.
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