Hioki 8847, Instruction Manual

Page: 30 / 372

2.2 Connecting Cords
20
Connect the cables or sensors to the input module.
Connect the logic probe(s) to the LOGIC terminal(s) on the instrument.
For detailed precautions and instructions regarding connections, refer to the doc-
umentation of input modules, connection cords, etc.
2.2 Connecting Cords
When measuring analog signals
When measuring logic signals
When measuring power line voltage
• The connection cords should only be connected to the secondary side of a
breaker, so the breaker can prevent an accident if a short circuit occurs. Con-
nections should never be made to the primary side of a breaker, because unre-
stricted current flow could cause a serious accident if a short circuit occurs.
• When connecting clip-type test leads to live terminals, be very careful to avoid
accidentally shorting conductors together and causing a serious accident.
• To prevent electrical shock and personnel injury, do not touch any input termi-
nals on the VT (PT), CT or the instrument when they are in operation.
• Do not permanently connect the device in an environment where voltage
surges exceeding the maximum input voltage may occur. Failure to observe
this precaution could result in damage to the device and personal injury.
Connecting to the BNC jacks on input modules
When disconnecting the BNC connector, be sure to release the lock before pull-
ing off the connector. Forcibly pulling the connector without releasing the lock, or
pulling on the cable, can damage the connector.
For voltage
To prevent an electric shock accident, confirm that the white or red portion (insu-
lation layer) inside the cable is not exposed. If a color inside the cable is
exposed, do not use the cable.
Use only the specified connection cords. Using a non-specified cable may result
in incorrect measurements due to poor connection or other reasons.
For temperature measurement
When connecting a thermocouple using a wire run of more than 3 meters, the
EMC environment including possible influence of external noise must be taken
into consideration.