3
3-13
IM 701830-01E
Before Starting Observation and Measurement of Waveforms
3.9
Connecting a Logic Probe
(For Logic Input Module and /N1 32-bit extended logic input)
CAUTION
• Applying a voltage exceeding the voltage indicated below may cause damage to
the logic probe or the instrument. At a frequency above 1 kHz, damage may occur
even when the voltage is lower than this voltage.
Maximum input voltage (at a frequency of 1 kHz or below)
High-speed logic probe (700986) 42 V (DC+ACpeak)
Isolation logic probe (700987)
250 Vrms (except ACpeak is 350 V or less, DC
is 250 V or less)
• On the high-speed logic probe, the 8 input lines on each POD have a common
earth. In addition, the earth for the instrument and the earth for each POD are also
common. Do not connect inputs which have different common voltages, as doing
so may cause damage to the main unit, logic probe, or other connected
instruments.
• Each input terminal of the isolation logic probe is isolated from all other input
terminals and the isolation logic probe is isolated from the DL716.
• Make sure to turn off the instrument before connecting or disconnecting the 26-pin
connector from the logic input connector.
• Do not stack the isolation logic probes during use. Also, allow enough space
around the probes to avoid a temperature increase inside the probes.
Logic Input Connector
Connect the accessory logic probe (700986 or 700987) to either of the logic probe input
connectors (the two connectors indicated POD A and POD B).
About the Logic probe
There are two types of probes available for connecting to the logic input connector of the
DL716.
• High-speed logic probe (700986)
• Isolation logic probe (700987)
Use the following leads to connect to the point of measurement.
The types of connecting leads that can be used on the high-speed logic probe
(700986)
The following two types are available.
• Connecting lead (alligator clip, parts No. B9879PX)
This lead is mainly used for connecting contact circuits. The lead consists of 8 signal lines
(red) and 8 earth lines (black).
• Connecting lead (IC clip, parts No. B9879KX)
This lead is mainly used for connecting electronic circuits. The lead consists of 8 signal lines
(red) and 2 earth lines (black).
The types of connecting leads that can be used on the isolation logic probe
(700987)
The following two types are available.
• For measuring voltages of 42 V or less
: Measurement lead, Model 366961
• For measuring voltages of 42 V or more
: Measurement lead, Model 758917
Do not alter the connecting leads. Doing so may cause the leads from satisfying the
specification.
