2-15
IM 710105-03E
Making Preparations for Measurements
1
2
3
4
5
App
Index
Handling Precautions of the Probe Interface Terminals and Probe Power
Terminals
If you are connecting the YOKOGAWA’s FET Probes, Current Probes, Differential
Probes, or Deskew Correction Signal Source to the Probe Power Terminals (option)
on the rear panel, be sure that the total current of the four Probe Power Terminals and
the four Probe Interface Terminals does not exceed 1.2 A. Otherwise, the DLM2000
operation may become unstable due to the activation of the excessive current protection
circuit of the power supply.
• When using current probes (701932/701933), the number of probes is limited,
depending on the measured current (the current measured by the current probes).
The characteristics of measured current versus current consumption for active probes
that can be connected to the DLM2000 are as follows.
701932/701933
701931
701928
701929
-50 -40 -30 -20 -10
0
10 20 30 40 50
Positive power supply, DC input
Negative power supply, DC input
Positive power supply, AC (50 Hz) input
Negative power supply, AC (50 Hz) input
Measured current (A)
Current consumption (mA)
-50 -40 -30 -20 -10
0
10 20 30 40 50
Measured current (A)
Current consumption (mA)
Positive power supply, DC input
Negative power supply, DC input
Positive power supply, AC (50 Hz) input
Negative power supply, AC (50 Hz) input
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
-500 -400 -300 -200 -100 0 100 200 300 400 500
Measured current (A)
Current consumption (mA)
Positive power supply, DC input
Negative power supply, DC input
Positive power supply, AC (50 Hz) input
Negative power supply, AC (50 Hz) input
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
-50 -40 -30 -20 -10
0
10 20 30 40 50
Measured current (A)
Current consumption (mA)
Positive power supply, DC input
Negative power supply, DC input
Positive power supply, AC (50 Hz) input
Negative power supply, AC (50 Hz) input
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
• In calculations, take the maximum current consumption of an FET probe (700939) or
differential probe (700924, 700925, 701920, 701921, 701922, or 701926) to be 125
mA for both negative and positive voltages. Take the maximum current consumption
of a differential probe (701927) to be 50 mA for both negative and positive voltages.
2.4 Connecting the Probe
