Hioki 2300 Smart Site, Instruction Manual, Page: 149 / 366

136
8 2321-20 WAVEFORM MODULE
(2) Logic input
Connecting to the Logic probe
• Connect the Model 9320-01 and Model MR9321-01 logic probe
when recording the logic.
• 2 logic probes can be connected to the instrument. 1 logic probe
can record 4CH of logic waveform and 2 logic probes can record
8CH of logic waveform.
Model 9320-01 LOGIC PROBE
• When measuring digital signals (Digital input)
Turn the input switch to DIGITAL. Use an IC clip read at the end.
Connect the alligator clip to the circuitground.Use the threshold
value selector to select the threshold value.
• When measuring the contact signal (Contact input)
Turn the input switch to CONTACT and use an alligator clip at the
end. A [H] signal is given when the input terminal is connected
with the GND.
• In the logic input area, two logic probes can be connected,
but LOGIC CHA and CHB in the internal circuit is not insu-
lated (common to GND). As the Model 9320/9320-01
does not have an insulated circuit, circuit accidents may
occur when voltage of a different GND level is inputted.
• Do not connect logic probes not specified by Hioki to the
logic input area.
When the Model 9323 converter cables are used for the
connection, Model 9320 and MR9321 logic probes can be
used in the instrument.
Digital input Threshold value Contact input Detecting resistance value
1.4 V
range
1.4 V ±0.3 V more than 1.5 k
Ω
less than 500
Ω
opened (Output L)
shorted (Output H)
2.5 V
range
2.5 V ±0.4 V more than 3.5 k
Ω
less than 1.5 k
Ω
opened (Output L)
shorted (Output H)
4.0 V
range
4.0 V ±0.5 V more than 25 k
Ω
less than 8 k
Ω
opened (Output L)
shorted (Output H)