Hioki 8808-51 - Page 312

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15.1 Logic Inputs
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Range
Digital input
(Threshold
value)
Contact input
(Detecting resistance value)
1.4 V 1.4 V 0.3 V
Open = more than 1.5 kΩ (Output L)
Short = less than 500 Ω (Output H)
2.5 V 2.5 V 0.4 V
Open = more than 3.5 kΩ (Output L)
Short = less than 1.5 kΩ (Output H)
4.0 V 4.0 V 0.5 V
Open = more than 25 kΩ (Output L)
Short = less than 8 kΩ (Output H)
IC Clip lead
Alligator clip type lea
d
NOTE
Refer to the manual supplied with the 9320-01 LOGIC PROBE
for details.
9320-01 LOGIC PROBE
The logic probes are used to test for circuit voltage and to
measure relay timing.
Measuring digital signals
Set the input selector to DIGITAL. Use an IC clip lead,
connect the alligator clip to the circuit ground, and adjust
the threshold value selector.
Measuring contact signals
Set the input selector to CONTACT. Use the alligator clip
leads. When an input terminal is connected to ground, a
high (H) level appears at the logic input.