1132A AGILENT TECHNOLOGIES, 1132A Datasheet - Page 28

• Manufacturer Part Number: 1132A
• Description: TEST PROBE, OSCILLOSCOPE
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 1132A

• Test Probe Type: Oscilloscope
• Test Probe Functions: High Frequency
• Accuracy: ± 3%
• For Use With: Infiniium Series Oscilliscopes
• Lead Free Status / RoHS Status: na

Current Probes Overview
Current probes sense the current
flowing through a conductor and
convert it to a voltage that can be
viewed and measured on an oscil-
loscope. There are two types of
current probes for oscilloscopes,
ac current probes (usually pas-
sive probes) and ac/dc current
probes (usually active probes).
Both types use the same principle
of transformer action for sensing
ac current in a conductor. The
alternating current flowing
through a conductor causes a flux
field to build and collapse accord-
ing to the amplitude and direc-
tion of current flow. The ac cur-
rent probe head is actually a coil—
when placed in this field the
changing flux field induces a volt-
age across the coil. The ac/dc cur-
rent probes also contain a Hall
Effect device to sense dc and low
frequency ac. Because dc doesn’t
cause a changing flux field it can-
not be sensed by transformer
action. Also, at frequencies very
close to dc, the flux field may not
change fast enough for measura-
ble transformer action.
Model
1146A
1147A
Current Probe Advantages
1146A low-cost model measures ac and dc current
to 100 Arms without breaking into the circuit
1147A measures ac and dc current to 50 MHz
without breaking into the circuit
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Probe Type
ac/dc Current
ac/dc Current
Figure 5.1. Agilent 1146A low-cost
ac/dc current probe.
Applications and Use
Measure dc and ac current simultaneously. Useful for
lines type power measurements.
Measure dc and ac current simultaneously. Useful for
pwm/switching power measurements.
Limitations
100 kHz bandwidth
15 A rated current
Figure 5.2. Agilent 1147A general-
purpose ac/dc current probe.
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