Operating Precautions
17
Connecting to the logic terminals
When connecting USB cable
To avoid electric shock and short circuit accidents or damage to
the instrument, pay attention to the following:
• Maximum logic probe input voltages are as follows.
Do not measure if the maximum voltage would be exceeded, as
damage the instrument or personal injury may result.
Model 9320-01 Logic Probe: +50 V DC
Model MR9321-01 Logic Probe: 250 Vrms (HIGH range), 150 Vrms
(LOW range)
• The ground terminal for the 9320-
01 Logic Probe is not isolated
from the Memory HiCorder's
ground (chassis ground). There
-
fore, if the measurement object
connect to AC, it should have a
grounded, polarized plug, and be
connected to the same power outlet as the Memory HiCorder’s
AC adapter.
If the Memory HiCorder and measurement object are connected
to different mains circuits, or if an ungrounded power cord is
used, the potential difference between the different grounding
paths may result in current flow through a logic probe that could
damage the measurement object or Memory HiCorder.
• Do not allow the metal tip of a logic probe to cause a short
between conductors on the measurement object. Never touch
the metal tip of a probe.
Measurement
Object
Memory
HiCorder
Logic
Probe
• To prevent a malfunction, do not disconnect the USB cable during
communication.
• The Memory HiCorder and computer should be connected to the
same earth ground. If grounded separately, potential difference
between the ground points can cause malfunctions or damage when
connecting the USB cable.
This instrument cannot be powered by the bus of a PC or USB hub.
When using the instrument, connect the AC adapter or install batteries.
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