Hioki LR8431, Instruction Manual

Page: 17 / 204

Operating Precautions
9
About Inputs and Measurement
• 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 these limits are exceeded, the instrument may be
damaged and personal injury or death could occur, so do
not attempt measurement.
• 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.
• Channels are insulated by semiconductor relays. When a
voltage beyond the specification is applied between the
channels, the semiconductor relay may short circuit. Please
ensure that a voltage beyond specification, especially a
surge such as a lightning, is never applied. When an abnor-
mal measurement value is observed, please contact your
dealer or Hioki representative for inspection.
The waveform for an open channel may sometimes appear to be
influenced by the signals of the other channels being measured. If
you do not like this, please set the waveform display of the open
channel to OFF or short-circuit the input terminals of the open
channel by connecting the positive and negative terminal.