Hioki 3197, Instruction Manual

Page: 52 / 200

3.4 Connecting Clamp Sensors
44
Connect the optional clamp sensors to the current input terminals on the
instrument. The clamp sensors that are compatible with this instrument
are voltage output types.
Compatible clamp sensors provide about 0.5 Vrms output corresponding
to full scale current. Refer to the instruction manual provided with the
clamp sensors.
3.4 Connecting Clamp Sensors
Before Connecting
Connect the clamp sensors to the instrument first, and then to the
active lines to be measured.
Observe the following to avoid electric shock and short circuits.
• Clamp sensors should only be connected to the secondary side
of a breaker, so the breaker can prevent an accident if a short cir-
cuit occurs. Connections should never be made to the primary
side of a breaker, because unrestricted current flow could cause
a serious accident if a short circuit occurs.
• When the clamp sensor is opened, do not allow the metal part of
the clamp to touch any exposed metal, or to short between two
lines, and do not use over bare conductors.
• To prevent damage to the instrument and sensor, never connect or
disconnect a connector while the power is on, or while the sensor is
clamped around a conductor.
• When disconnecting the BNC connector, be sure to release the lock
before pulling off the connector. Forcibly pulling the connector without
releasing the lock, or pulling on the cable, can damage the connector.