4-11
IM DL350-01EN
Probe Attenuation and Current-to-Voltage Conversion Ratio
(Probe)
In voltage (current) measurement, a probe is used to connect the circuit under measurement to a signal input
terminal. Using a probe has the following advantages.
• Prevents the disturbance of the voltage and current of the circuit being measured.
• Allows signals to be applied with no distortion.
• Expands the voltage (current) range that the instrument can measure.
When you use a probe, to read the measurement voltage (current) correctly, you must set the attenuation on the
instrument to match the probe attenuation or current-to-voltage conversion ratio.
Set the attenuation ratio as indicated below for each probe. (The probes are optional accessories that are sold
separately.)
Probe Type
Attenuation
Isolated probe (700929)
10: 1
Isolated probe (701947)
100:1
Current probe (701917/701918)
1 A: 1 V
Current probe (701932/7019333)
10 A: 1 V
Current probe (701930/701931)
100 A: 1 V
Clamp-on probe (720930)
100 A: 1 V
Clamp-on probe (720931)
400 A: 1 V
The attenuation settings available on the instrument are 1:1, 10:1, 100:1, 1000:1, 1 A:1 V,
1
10 A:1 V,
2
100
A:1 V,
3
400 A: 1 V
4
. If you use a probe other than one of the separately sold optional accessories provided by
Yokogawa, set the attenuation ratio in accordance with that probe.
1 Output voltage rate: 1 V/A
2 Output voltage rate: 0.1 V/A
3 Output voltage rate: 0.01 V/A
4 Output voltage rate: 2.5 mV/A
Use a probe that is appropriate for the input capacitance of the module that you are using it with. The
capacitance cannot be adjusted for an inappropriate probe.
Labels (Label)
You can specify a name of up to sixteen characters in length for each channel.
You can set whether to display labels using the Display menu.
• The waveform display on/off setting changes to the waveform acquisition on/off setting in cases such
as during SD recording and when an increase in the record length places a limitation on the number of
channels that can be used.
• The specified display label is used in labels, scale values, the numeric display, and cursor-measurement
values.
• Depending on the display and zoom formats, label names may not appear when the waveform display is
narrow.
4 Vertical Axis