2-18
IM 710105-03E
2.6 Connecting
Logic Probes
WARNING
• Always turn off the power of the device under measurement before connecting
the device under measurement to the instrument.
• Do not apply an input voltage that exceeds the maximum input voltage.
• To avoid electric shock, be sure to ground the instrument, and connect the ground
of the probe and input connector to the ground of the item being measured.
CAUTION
• The maximum input voltage for the logic probe (701980, 701981, and 701989)
input is ±40 V (DC+ACpeak) or 28 Vrms. And The maximum input voltage for
the logic probe (701988) input is ±42 V (DC+ACpeak) or 29 Vrms. Applying a
voltage greater than either of these limits may damage the logic probe or the
instrument. If the frequency is high, damage may occur even if the voltage is
below the values specified above. For information about derating based on
frequency, see the user’s manual of the logic probe that you are using.
• The eight input lines on the logic port have a common ground. In addition, the
ground for the instrument and the ground for the logic port is also a common
ground. Do not apply inputs that have different common voltages, as doing
so may cause damage to the instrument, the logic probe, or other connected
instruments.
• Make sure to turn OFF the power to the DLM2000 before connecting or
disconnecting a logic probe cable (701980 or 701981).
• For information about how to handle a logic probe, refer to the user’s manual
that came with the logic probe.
