2.3 Connecting Measurement Cables to the Memory HiLogger
31
3
2
Chapter 2 Measurement Preparations
Connect the appropriate cables for the intended recording application.
• When recording voltage fluctuations or temperature changes (p. 32)
• When recording pulse signals (p. 33)
Be sure to read the "Operating Precautions" (p. 6) before connecting the cables.
Connecting to the Analog Input Terminals
2.3 Connecting Measurement Cables to
the Memory HiLogger
• The maximum input voltage (and the maximum rated volt-
age to earth) for the analog input terminals is
30 Vrms (or 60
V DC). If the voltage is exceeded, this device will be dam-
aged and personal injury will
result. Therefore, do not per-
f
orm measurement in this case.
• Do not leave the Memory HiLogger connected to test objects
in environments where a voltage surge might exceed the
dielectric withstand voltage. Doing so could result in damage
to the Memory HiLogger, bodily injury or fatal accident.
• Do not connect a cable to the instrument while it is con-
nected to the object to be measured. Otherwise, an
electric
shock accident may occur.
• To avoid short-circuit accidents, make certain that connec-
tions are secure.
• Channels are insulated by semiconductor relays.
When a voltage beyond the specification i
s
applied between
the channels, the semiconductor relay may short circuit.
Please ensure that a voltage beyond specification, espe-
cially a surge such as a lightning, is nev
e
r applied. When an
abnormal measurement value is observed, please contact
your dealer or Hioki representative for inspection.
• Measurements may be affected by noise or other electromag-
netic ingress if input leads are longer than about three meters.
• Route measurement leads and cables as far away as possible
from power and earth lines.
• Measurement values may be scattered if the leads are routed in
para
llel with other devices. If they must be parallel, check opera-
tion before taking measurements.
• Avoid temperature changes around the terminal blo
c
k. Especially avoid
directed airflow such as from an electric fan or air-conditioner vent.
• If connecting crimped terminals to the analog input terminals, use
insu
la
ted terminals for M3 screws with the size shown below.
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