Toshiba LF620 B Series Instruction Manual page 7

Handling Precautions (continued)
(6) The converter housing covers and the cable glands are tightened securely at the time of
shipment. Do not remove these covers or glands unless it is necessary to wire new cables or
replace old ones. Otherwise, gradual deterioration of circuit isolation or damage to this product
can be caused.
(7) 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.
•
When opening and closing the converter housng cover, be careful not to pinch your
fingers on the cover.
(8) 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.
(9) 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.
(10) 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.
(11) 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.
(12) 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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