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Precautions to Be Taken When Using Current Probes
When connecting the current probe to the probe power supply terminal on the right side panel,
make sure that the current does not exceed the range shown below. Otherwise, the DL850/DL850V
operation may become unstable due to the activation of the excessive current protection circuit of the
power supply.
(Total current consumption for A through D) ≤ 1 A
If the terminals are named A through D
A
PROBE
POWER
(±12V DC )
B
C
D
Specifications of the Probe Power Supply Terminals (Optional)
Item
Number of probes that can be used
4
Probes that can be used
Current probe (700937, 701930, 701931, and 701933)
Number of current probes that can be used
700937 (15 A): Up to 4
701930 (150 A): Up to 2
701931 (500 A): Up to 1
701933 (30 A): Up to 2
Supply voltage
±12 V, two outputs (up to 1 A total current)
When using the current probe, the number of probes that can be used is limited by the current
generated by the device under measurement (current measured by the current probe). The measured
versus consumed current characteristics of current probes that can be connected to the instrument are
indicated below.
-250
-200
-150
-100
-50
-15
-10
-5
0
5
10
15
0
50
100
150
200
250
Current probe (700937)
Current consumption (mA)
Measured current (A)
Positive
current
Negative
current
-400
-300
-200
-100
-150
-100
-50
0
50
100
150
0
100
200
300
400
Current probe (701930)
Current consumption (mA)
Measured current (A)
Positive
current
Negative
current
AC (f = 50 Hz)
DC
AC (f = 50 Hz)
DC
-500
-400
-300
-200
-100
-500 -400 -300
0
100 200
500
0
100
200
300
400
500
Current consumption (mA)
Measured current (A)
Positive
current
Negative
current
-200 -100
300 400
Current probe (701931)
AC (f = 50 Hz)
DC
Current probe (701933)
Current consumption (mA)
Measured current (A)
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
Positive
current
Negative
current
AC (f = 50 Hz)
DC
-50 -40 -30 -20 -10
0
10
20
30
40
50
For details about each current probe, contact your nearest YOKOGAWA dealer.
3.5 Connecting Probes
3-18
IM DL850-03EN