Hioki RM3542-50, Instruction Manual

Page: 15 / 234

Operating Precautions
9
This instrument may cause interference if used in residential areas. Such use must be
avoided unless the user takes special measures to reduce electromagnetic emissions to pre-
vent interference to the reception of radio and television broadcasts.
Handling the Instrument
To avoid damage to the instrument, protect it from physical shock when transporting and
handling. Be especially careful to avoid physical shock from dropping.
Handling the Fixture
Before using a test fixture, read the instructions provided with it.
Before Turning Power On
• Before turning the instrument on, make sure the supply voltage matches the voltage
indicated on its power connector. Connection to an improper supply voltage may
damage the instrument and present an electrical hazard.
• To avoid electrical accidents and to maintain the safety specifications of this instru-
ment, connect the power cord provided only to an outlet.
Avoid using an uninterruptible power supply (UPS) or DC/AC inverter with rectangular wave
or pseudo-sine-wave output to power the instrument. Doing so may damage the instrument.
Before Connecting EXT. I/O Connector
To avoid electric shock or damage to the equipment, always observe the following
precautions when connecting to the EXT. I/O connectors:
• Always turn off the power to the instrument and to any devices to be connected
before making connections.
• During operation, a wire becoming dislocated and contacting another conductive
object can be serious hazard. Use screws to secure the EXT. I/O connectors.
To avoid damage to the instrument, always observe the following precautions when
connecting to the EXT. I/O connector.
• Do not apply voltage or current to the EXT. I/O terminals that exceeds their ratings
(p. 103).
• Ensure that devices and systems to be connected to the EXT. I/O terminals are
properly isolated.
• When driving relays, be sure to install diodes to absorb counter-electromotive
force.
• The IISO_5 V pin of the EXT. I/O connector is a 5 V power output. Do not apply exter-
nal power to this pin. Be careful not to short-circuit ISO_5 V to ISO_COM.
• The IISO_12 V pin of the EXT. I/O connector is a 12 V power output. Do not apply
external power to this pin. Be careful not to short-circuit ISO_12 V to ISO_COM.
See "Connector Type and Signal Pinouts" (p. 96).