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3-29
IM 701210-05E
Making Preparations for Measurements
3
• Types of Measuring Leads That Can Be Used on the Isolated Logic Probe
(700987)
Use the following measuring lead.
• For measuring voltages of 42 V or more: Measuring lead for isolation logic
(758917)
An alligator adapter (758922), alligator adapter (758929), or alligator clip (dolphin
type, 701954) is needed to make measurements.
Note
Do not alter the connecting leads. Doing so may cause the leads from satisfying the
specification.
Connecting Logic Probes
High-Speed Logic Probe (700986)
1.
Attach the accessory connecting lead (IC clip or alligator clip) to the logic probe,
and lock the connector by clamping the lever inwards. To release the
connecting lead from the logic probe, pull both levers outwards. Proceed to step
3.
Isolated Logic Probe (700987)
1.
Connect the measuring lead to the input terminal of the logic probe.
2.
Set the input switch. The threshold level is set to 50 VAC
±
50% (Hi: 80 to 250
VAC, Lo: 0 to 20 VAC) and 6 V
±
50% (Hi: 10 to 250 VDC, Lo: 0 to 3 VDC)
when set to “AC” and “DC,” respectively.
Connecting the Logic Probe to the Logic Signal Input Connector
3.
Turn OFF the DL750/DL750P.
4.
Connect the end with the 26-pin connector (clamp filter with ferrite core, parts
No. A1190MN) of the logic probe to the logic signal input connector of the
DL750/DL750P
5.
Turn ON the DL750/DL750P.
To the logic signal input connector on
the left side panel of the DL750/DL750P
Note
•
Each bit is displayed as “L level” when the logic probe is not connected to the instrument.
•
For the specifications of the logic probe, see section 19.13, “Logic Probe Specifications.”
•
The logic input display is turned OFF by default. For the procedure in turning ON/OFF the
display, see section 5.1, “Turning Channels ON/OFF.”
3.11 Connecting Logic Probes