3-19
IM 701240-01E
3
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App
Index
Preparations for Measurements
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 SL1400 operation may become unstable due to the activation of the excessive
current protection circuit of the power supply.
A
(Total current consumption of A through D)
≤
800 mA
When each terminal is assigned names A through D
PROBE
POWER
( 12 V)
B
C
D
Specifications of the Probe Power Supply Terminals (Option)
Item
Number of probes that can be used
4
Compatible probes*
Current probe (701930, 701931, and 701933)
Number of current probes that can
701930 (150 A):
2
be used
701931 (500 A):
1
701933 (30 A):
2
Supply voltage
±
12 V
2 outputs (up to a total of 800 mA)
*
Up to four 700937 current probes can be used, but the 700937 is a discontinued product.
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 characteristics of the measured current versus the current consumption of a
current probe that can be connected to the SL1400 are shown below.
-250
-200
-150
-100
-50
-15
-10
-5
0
5
10
15
0
50
100
150
200
250
Current probe (700937)
Measured current [A]
Positive
current
Negative
current
AC (f = 50 Hz)
DC
Current consumption [mA]
-400
-300
-200
-100
-150
-100
-50
0
50
100
150
0
100
200
300
400
Current probe (701930)
Measured current [A]
Positive
current
Negative
current
AC (f = 50 Hz)
DC
Current consumption [mA]
Current probe (701933)
Measured current [A]
-50 -40 -30 -20 -10 0 10 20 30 40 50
600
500
400
300
200
100
0
-100
-200
-300
-400
-500
-600
Positive
current
Negative
current
AC (f = 50 Hz)
DC
Current consumption [mA]
-500
-400
-300
-200
-100
-500 -400 -300
0
100
200
500
0
100
200
300
400
500
Measured current [A]
Positive
current
Negative
current
-200 -100
300
400
Current probe (701931)
AC (f = 50 Hz)
DC
Current consumption [mA]
For details about each current probe, contact your nearest YOKOGAWA dealer.
3.7 Connecting Probes