2-16
IM DLM5058-03EN
Handling Precautions for the Probe Interface Terminals and Probe
Power Terminals
If you are connecting an FET probe, current probe, or differential probe to one of the probe power
terminals (option) on the right side panel, be sure that the total current of the eight probe power
terminals and the eight probe interface terminals (±12 V each) on 8 channel models or that of
the four probe power terminals and the four probe interface terminals (±12 V each) on 4 channel
models does not exceed 2.0 A. Otherwise, the instrument's operation may become unstable as a
result of the activation of the overcurrent protection circuit of the power supply.
• The number of current probes that can be used is limited by the measured current (the current
measured by the current probes). The characteristics of measured current versus current
consumption for the active probes that can be connected to the instrument are as follows.
Measured current (A)
Measured current and current
consumption of the 701932/701933
current probe (example of characteristics)
Measured current (A)
Measured current and current
consumption of the 701931 current probe
(example of characteristics)
Measured current (A)
Measured current and current
consumption of the 701928 current probe
(example of characteristics)
Measured current and current
consumption of the 701929
current probe (example of characteristics)
Current consumption (mA)
-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
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
Current consumption (mA)
-500 -400 -300 -200 -100 0 100 200 300 400 500
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
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
-50 -40 -30 -20 -10 0
10 20 30 40 50
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
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
-50 -40 -30 -20 -10 0
10 20 30 40 50
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 (701925, 701977, or 701978) 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 Probes
