Keysight 1146B
AC/DC Current Probe
User’s Guide
Notices
CAUTION
WARNING
© Keysight Technologies, Inc. 1996 - 2014
No part of this manual may be reprod uced in any form
or by any means (including electronic storage and
retrieval or translation into a foreign language) without prior agreement and written consent from Keysight Technologies, Inc. as governed by United States
and international copyright laws.
Manual Part Number
01146-92005
Second Edition, October 2014
Printed in Malaysia
Published by:
Keysight Technologies, Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA, 95403
Warranty
The material contained in this document is provided
“as is,” and is subject to being changed, without
notice, in future editions. Further, to the maximum
extent permitted by applicable law, Keysight disclaims all warranties, either express or implied, with
regard to this manual and any information contained
herein, includ ing but not limited to the impl ied warranties of merchantability and fitness for a particular
purpose. Keysight shall not be liable for errors or for
incidental or consequential damages in connection
with the furnishing, use, or performance of this document or of any information contained herein.
Should Keysight and the user have a separate written agreement with warranty terms covering the
material in this document that conflict with these
terms, the warranty terms in the separate agreement
shall control.
defined in FAR 52.227-19 (June 1987) or any equivalent agency regulation or contract clause. Use, duplication or disclosure of Software is subject to Keysight
Technologies’ standard commercial license terms,
and non-DOD Departments and Agencies of the U.S.
Government will receive no greater than Restricted
Rights as defined in FAR 52.227-19(c)(1-2) (June
1987). U.S. Government users will receive no greater
than Limited Rights as defined in FAR 52.227-14
(June 1987) or DFAR 252.227-7015 (b)(2) (November
1995), as applicable in any technical data.
Safety Notices
A CAUTION notice denotes a hazard. It calls
attention to an operating procedure, practice,
or the like that, if not correctly performed or
adhered to, could result in damage to the product or loss of important data. Do not proceed
beyond a CAUTION notice until the indicated
conditions are fully understood and met.
A WARNING notice denotes a hazard. It calls
attention to an operating procedure, practice,
or the like that, if not correctly performed or
adhered to, could resul t in personal injury or
death. Do not proceed beyond a WARNING
notice until the indicated conditions are fully
understood and met.
Technology Licenses
The hardware and/or software described in this document are furnished under a license and may be used
or copied only in accordance with the terms of such
license.
Restricted Rights Legend
If software is for use in the performance of a U.S. Government prime contract or subcontract, Software is
delivered and licensed as “Commercial computer
software” as defined in DFAR 252.227-7014 (June
1995), or as a “commercial item” as defined in FAR
2.101(a) or as “Restricted computer software” as
2
Contents
Operation / 5
Before Using the Probe / 5
To Install the Battery / 7
To Perform a Current Measurement / 8
To Clean the Probe / 8
Product Markings / 9
Safety / 10
Concerning the Oscilloscope or Voltage Measuring
Instrument to Which the Probe is Connected / 11
Specifications / 13
Characteristics / 14
Safety Standards / 16
Typical Response Curves / 16
Performance Verification / 18
If the Probe Fails a Test / 19
Test 1. DC Current Measurement Accuracy (10 mV/A
range) / 20
Test 2. AC Current Measurement Accuracy (10 mV/A
range) / 21
Test 3. Bandwidth (10 mV/A range) / 22
Test 4. DC Current Measurement Accuracy (100 mV/A
range) / 23
Test 5. AC Current Measurement Accuracy (100 mV/A
range) / 24
Test 6. Bandwidth Check (100 mV/A range) / 25
3
4
Keysight 1146B AC/DC Current Probe
User’s Guide
Operation
The 1146B AC/DC Current Oscilloscope Probe expands
oscilloscope applications in industrial, automotive or power
environments, and is ideal for analysis and measurement of
distorted current waveforms and harmonics. The probe permits
accurate display and measurement of currents from 100 mA to
100A rms, DC to 100 kHz without breaking into the circuit. The
probe uses Hall effect technology to measure AC and DC signals.
The probe connects directly to an oscilloscope through a 2 meter
coaxial cable with an insulated BNC.
The 1146B probe is compatible with any analog or digital
oscilloscope or other voltage measuring instrument which has the
following features:
- BNC input connector.
- Range capable of displaying 0.2V to 0.5V per division.
- Minimum input impedance of 1 M
Ω.
Before Using the Probe
- Install the battery that was shipped with the probe. Refer to
“To Install the Battery" on page 7.
- Read the warnings listed under “Safety" on page 10.
- Confirm that the probe has not been damaged in transit. If the
unit is damaged, or fails to operate according to the
specifications, contact your dealer or Keysight representative.
- Check that the contents of the shipment agree with the
packing slip. If anything is missing, contact your nearest
Keysight Technologies, Inc. Sales Office. If the shipment was
damaged, contact the carrier, then contact the nearest
Keysight Technologies, Inc. Sales Office.
5
Figure 1 Control and Connector Identification
Zero-Adjust Knob
Operation
Use the zero adjust knob to eliminate the probe’s offset before
performing a measurement.
Battery Power Indicator
To ensure proper readings with your current probe, be sure that
the green battery indicator is lit during measurement. If not,
replace the 9V battery as described in “To Install the Battery" on
page 7.
Peak Overload (OL) Indicator
If the red Peak Overload indicator illuminates during
measurement, this indicates that the peak value exceeds the
instrument response level and that the output is distorted. Use the
range selection switch to change the probe to a higher range, if
possible.
Range Selection Switch
Use the range selection switch to turn the probe OFF and to select
from two ranges: 10 mV/A and 100 mV/A.
6
WARNING
It is possible to change the current probe ‘s range without removing the
WARNING
probe from the current carrying conductor, but never exceed the
permissible peak ratings of 1000 mV peak or 2000 mV peak-to-peak
maximum. The peak ratings by range are: 10A peak on the 100 mV/A
range, 100A peak on the 10 mV/A range.
To Install the Battery
Before using the probe for the first time, you must install the
battery. When the probe is turned on, the green battery indication
LED should light up. If not, replace the battery.
1 Disconnect the probe from the circuit and the oscilloscope.
Do not replace the battery while probe is in use.
2 Set the probe’s switch to the OFF position.
3 Unscrew the battery compartment screw (shown on Figure 1 on
page 6) and pull out the battery compartment cover.
4 Install the new 9V battery and put the cover back on.
Operation
7
To Perform a Current Measurement
WARNING
WARNING
WARNING
1 Read the warnings in “Safety" on page 10.
2 Connect the current probe to an input channel on the
oscilloscope.
Connect the probe to the oscilloscope or voltage measuring instrument
before clamping the probe around a conductor.
3 Set the current probe to its least sensitive range (10 mV/A).
4 Select the 0.5 V/division range on the oscilloscope.
5 Clamp the probe on the conductor to be measured and read the
current flowing directly on your oscilloscope.
You may also use your oscilloscope to amplify the signal while
using the 100 mV/A probe range (which offers the best accuracy
and least phase shift).
It is possible to change the range on the current probe without removing
the probe from the current carrying conductor, but never exceed the
permissible peak ratings of 1000 mV peak or 2000 mV peak-to-peak
maximum. The peak ratings by range are: 10A peak on the 100 mV/A
range, 100A peak on the 10 mV/A range.
Operation
To Clean the Probe
1 Remove the probe from any circuit under test and from the
oscilloscope.
2 Clean the external surfaces of the probe with a soft cloth
dampened with a mixture of mild detergent and water.
3 Clean the mating surfaces of the probe’s jaws so that they are free
of dirt or foreign matter. If rust is present, gently clean the mating
surfaces with a soft cloth that has been lightly oiled with standard
machine oil. Do not leave excessive oil residue.
Make sure that the probe is completely dry before reconnecting it to a
power source.
8
Product Markings
Product Markings
This symbol indicates the Environmental Protection Use
Period (EPUP) for the product’s toxic substances for the
China RoHS requirements.
The CE symbol indicates the European Community.
CAUTION. Risk of Danger. Refer to the manual for more
information.
CAUTION. Risk of Electric Shock. Refer to the manual for
more information.
This symbol signifies that the probe is protected by
double or reinforced insulation. Only use specified
replacement parts when servicing the probe.
Earth terminal symbol: Used to indicate a circuit
common connected to grounded chassis.
WEEE Directive notice. This marking is on a notice
sticker and is not actually fixed to the product.
9
Safety
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Safety
This manual provides information and warnings essential for
operating this probe in a safe manner and for maintaining it in safe
operating condition. Before using this equipment and to ensure
safe operation and to obtain maximum performance from the
probe, carefully read and observe the following warnings,
cautions, and notes.
This apparatus has been designed and tested in accordance with
IEC61010, Safety Requirements for Measuring Apparatus, and has
been supplied in a safe condition. Note the external markings on
the instrument that are described in this document.
Connect the probe to the oscilloscope or voltage measuring instrument
before clamping the probe around a conductor.
Never use the probe on circuits rated higher than 600 Vac RMS CAT II or
300 Vac RMS CAT III or with float voltage greater than 600 V.
Never leave the probe clamped around a cond uctor while it is not
connected to an oscilloscope or voltage measuring instrument.
Carefully center the conductor inside the probe jaws and ascertain that
the probe is perpendicular to the cond uctor before closing the jaws.
Check the magnetic mating surfaces of the probe jaws; these should be
free of dirt, rust, or other foreign matter.
Do not use a probe which is cracked, damaged or has defective leads.
10
Safety
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Avoid, if possible, the proximity of other cond uctors which may create
noise.
Do not install substitute parts or perform any unauthorized modification to
the probe.
Do not clamp the probe on a bare/un-insulated conductor.
Do not operate the probe or oscilloscope in the presence of flammable
gasses or fumes. Operation of any electrical instrument in such an
environment constitutes a definite safety hazard.
Do not use the probe or oscilloscope in a manner not specified by the
manufacturer.
Service instructions are for trained service personnel. To avoid dangerous
electric shock, do not perform any service unless qualified to do so. Do
not attempt internal service or adjustment unless another person, capable
of rendering first aid and resuscitation, is present.
Concerning the Oscilloscope or Voltage Measuring Instrument to Which the
Probe is Connected
Whenever it is likely that the ground protection is impaired, you must
make the instrument inoperative and secure it against any unintended
operation.
If you energize the instrument by an auto transformer (for voltage
reduction or mains isolation), the ground pin of the input connector
terminal must be connected to the earth terminal of the power source.
11
Safety
WARNING
WARNING
WARNING
Before turning on the instrument, you must connect the protective earth
terminal of the instrument to the protective conductor of the (mains)
power cord. The mains plug shall only be inserted in a socket outlet
provided with a protective earth contact. You must not negate the
protective action by using an extension cord (power cable) without a
protective conductor (grounding). Ground ing one conductor of a
two-conductor outlet is not sufficient protection.
Only fuses with the required rated current, vol tage, and specified type
(normal blow, time delay, etc.) should be used. Do not use repaired fuses
or short-circuited fuseholders. To do so could cause a shock or fire
hazard.
Capacitors inside the instrument may retain a charge even if the
instrument is disconnected from its source of supply.
12
Specifications
All probe specifications are warranted based on the following
conditions:
- Within one year of calibration
- 23° C ±5° C
- 20% to 75% relative humidity
-Probe zeroed
- 1 minute warm up
- Battery at 9V ± 0.1V
- External magnetic field < 40 A/m
- No adjacent current carrying conductor
-1 M
Ω /100 pF probe termination
Table 1 Specifications
Item Specification
Specifications
Measurement Accuracy (Input
Current: dc to 1 kHz)
50 mA to 10A < ±3% of reading ±50 mA —
50 mA to 40A n/a < ±4% of reading ±50 mA
40A to 100A n/a < ±15% of reading ±100 mA
Bandwid th (–3 dB) dc to 100 kHz
100 mV/A
Sensitivity Setting
(with derating, see “Typical Response Curves" on page 16)
13
10 mV/A
Sensitivity Setting
Characteristics
All probe characteristics are the typical performance values and
are not warranted. Characteristics are based on these conditions:
- Within one year of calibration
- 23° C ±5° C
- 20% to 75% relative humitidy
-Probe zeroed
- 1 minute warm up
- Battery at 9V ± 0.1V
- External magnetic field < 40 A/m
- No adjacent current carrying conductor
-1 M
- Conductor centered in jaw
Table 2 Characteristics
Characteristics
Ω /100 pF probe termination
100 mV/A
Item
Current Measurement Range 0A to 10A dc or peak ac 0A to 100A dc or peak ac
Phase Shift (DC to 1 kHz,
no DC component)
Noise 3 mV 480 µV
Slew Rate 0.3 V/µs 20 mV/µs
Insertion Impedance (50 Hz/60 Hz) 0.01Ω 0.01Ω
Rise or Fall Time 3 µs 4 µs
Influence of Adjacent Conductor < 0.2 mA/A ac < 0.2 mA/A ac
Influence of Conductor Position in
Jaw
Overload Indication Red LED (OL) indicates input is out of range
Maximum Working Voltage (refer to
safety warnings and standards)
Maximum Floating Voltage (refer to
safety warnings and standards)
Sensitivity Setting
< 1.5° dc to 65 Hz < 1.0° dc to 65 Hz
0.5% of reading in jaw 0.5% of reading in jaw
600Vac RMS CAT II
300Vac RMS CAT III
600Vac RMS CAT II
300Vac RMS CAT III
10 mV/A
Sensitivity Setting
600Vac RMS CAT II
300Vac RMS CAT III
600Vac RMS CAT II
300Vac RMS CAT III
14
Table 3 Environmental and Mechanical Characteristics
Item Characteristic
Environmental Conditions
Characteristics
Operating Temperature
Range
Storage Temperature
Range
Temperature Influence < 0.2% per ° C
Max Operating Humidity 10° C to 30° C: 85% RH (without condensation)
Altitude Operating: 0 to 2000m
Indoor Use This probe is rated for indoor use only
Mechanical
Zero Adjustment 20 turn potentiometer
Maximum cable diameter 11.8 mm
Case Protection IP20 per IEC 529
Drop Test 1.0 m on 38 mm of oak on concrete, tested according to IEC
Mechanical Shock 100 G; test per IEC 68-2-27
Vibration Tested per IEC 68-2-6, frequency range 10 Hz to 55 Hz, amplitude
0° C to 50° C
–30° C to 80° C
40° C to 50° C: 45% RH (without condensation)
Non operating: 0 to 12,000m
61010
0.15 mm
Handle Lexan 920A, UL 94 V2
Dimensions 231 mm x 36 mm x 67 mm
Weight 330 g (11.6 oz) with battery
Color Light gray
Output cable Insulated coaxial cable with insulated BNC connector
Output cable length 2m
15
Table 4 Battery Characteristics
Battery Characteristic
Battery Type 9V Alkaline (NEDA 1604A, IEC 6LR61)
Low Battery Indication Green LED (ON) when battery voltage ≥ 6.5V
Typical Battery Consumption 8.6 mA
Typical Battery Life 55 hours
Safety Standards
- Double insulation or reinforced insulation between primary or
secondary and outer case of the handle, per IEC61010.
- 600V Category III, Pollution degree 2.
- 300V Category IV, Pollution degree 2.
- 5550V 50/60 Hz between primary or secondary and the outer
case of the handle.
- 3250V 50/60 Hz between primary and secondary
Typical Response Curves
Characteristics
Figure 2 Typical Frequency Response Curve
16
Figure 3 Typical Phase Shift Response Curve
Characteristics
Accuracy
Figure 4 Linearity for a DC Signal Range 10 mV/A
17
Performance Verification
NOTE
Performance Verification
To ensure that the probe complies with the factory specifications,
perform the six tests in this section in the order listed. Connect the
required equipment listed in Table 5 as shown in Figure 6 on
page 19.
Allow 30 minutes for warm up before starting the tests. While the test
system is warming up, clean the magnetic contacts on the probe’s jaw.
Table 5 Required Equipment for Performance Verification Tests
Recommended
Description Critical Specifications
Model/Part Numbers
Digital Multimeter
(2 required)
AC/DC voltage and current
measurement accuracy better
than ±0.1% of reading Input
resistance in AC/DC voltage mode
Keysight 34401A or Keysight
3458A
≥1MΩ
Signal Generator DC to 100 kHz sine waves
Able to generate more than 10 mA
in the test coil (e.g. an inductive
load).
Patch Cable Assembly Banana plug connectors
≤ 36 in (91 cm)
Length
Adapter BNC (m) to dual banana Pomona 1296
Adapter BNC (f) to dual banana Pomona 1269
Banana Jack (2 required) Stackable Pomona 1325-0
Coil 10 turns (requires about 4 ft or
1.2 m of transformer wire or wire
wrap wire.)
Construct a 10-turn coil with a diameter of about 4 inches (10 cm)
as shown in Figure 5 on page 19. Use wire wrap or transformer
wire and attach stackable banana plugs to the coil for connection
to the instruments during testing.
Keysight 33120A or Fluke 5500A
Pomona 1440-36-0
OK Industries R30B-0100(100 ft
roll of 30AWG wire wrap wire)
18
Figure 5 10 Turn Coil
Performance Verification
Figure 6 Equipment Setup
If the Probe Fails a Test
1 Replace the battery. Verify that the battery voltage is 9V ±0.1V.
2 Ensure that:
- The probe's magnetic contact surfaces are clean
- The probe tip closes completely around the coil's conductors
- The coil is centered in the probe tip opening
- The probe tip is perpendicular to the coil's conductors
19
Performance Verification
NOTE
NOTE
- The probe current flow indicator points in the correct direction
3 Demagnetize the probe by opening and closing the clamp 5 to 10
times.
Test 1. DC Current Measurement Accuracy (10 mV/A range)
1 Configure the instruments as follows:
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Volts
Probe’s Range Selector Switch . . . . . . . . . . . . . . . . . . . . 10 mV/A
2 Disconnect the probe from the coil and adjust the zero control to
minimize the probe's DC output voltage. Record this zero offset
voltage (V
3 Clamp the probe around the coil.
Ensure that the DC current direction in the coil matches the current
direction arrow on the probe. Position the probe as perpendicular as
possible to the coil.
4 Set up the Keysight 33120A as follows:
Waveform:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mVpp (minimum)
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.0 Vdc
5 Measure the current in the coil on DMM 1 and record this value (I
in Table 4.
) in Tabl e 6 on page 21.
z
)
c
The current in the coil must be ≥10 mA. Increase the generator offset if
necessary to achieve a current reading of at least 10 mA.
6 Measure the voltage output by the probe on DMM 2 and record
) in Tab le 6.
(V
probe
7 Do the calculations specified in Tab le 6 to determine if the probe
passes the test.
20
Performance Verification
NOTE
Table 6 DC Current Measurement Accuracy Record (10 mV/A range)
Measurement Recorded Value
Probe Zero Offset Voltage (Vz)
Current in Coil (Ic)
Probe Output Voltage (V
probe
)
Calculate Maximum Probe Output Voltage As:
V
probe max
= (Ic * 10 * 10 m V/A * 1.04) + V
Calculate Minimum Probe Output Voltage As:
V
probe min
= (Ic * 10 * 10 m V/A * 0.96) + V
z
Probe Passes Test if:
V
probe min
≤ V
probe
≤ V
probe max
Test 2. AC Current Measurement Accuracy (10 mV/A range)
8 Set the DMM modes to:
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Volts
9 Set the Keysight 33120A to:
Waveform: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Vpp
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Vdc
10 Measure the current (I
on page 22.
The current in the coil must be ≥10 mA. Increase the generator offset if
necessary to achieve a current reading of at least 10 mA.
Z
) in the coil on DMM 1 and record in Table 7
c
11 Measure the voltage output by the probe (V
) on DMM 2 and
probe
record in Ta ble 7.
12 Do the calculations specified in Tab le 7 to determine if the probe
passes the test.
21
Performance Verification
NOTE
Table 7 AC Current Measurement Accuracy Record (10 mV/A range)
Measurement Recorded Value
Current in Coil (Ic)
Probe Output Voltage (V
probe
)
Calculate Maximum Probe Output Voltage As:
V
probe max
= (Ic * 10 * 10 mV/A * 1.04)
Calculate Minimum Probe Output Voltage As:
V
probe min
= (Ic * 10 * 10 mV/A * 0.96)
Probe Passes Test if:
V
probe min
≤ V
probe
≤ V
probe max
Test 3. Bandwidth (10 mV/A range)
13 Increase the generated frequency to 100 kHz.
14 Measure the current in the coil (I
page 23.
The current in the coil must be ≥10 mA. Increase the generator offset if
necessary to achieve a current reading of at least 10 mA.
15 Measure the voltage output (V
record in Ta ble 8.
16 Do the calculations specified in Tab le 8 to determine if the probe
passes the test.
) and record in Table 8 on
c
) by the probe on DMM 2 and
probe
22
Performance Verification
NOTE
NOTE
Table 8 Bandwidth Record (10 mV/A range)
Measurement Recorded Value
Current in Coil (Ic)
Probe Output Voltage (V
probe
)
Calculate Maximum Probe Output Voltage As:
V
probe max
= (Ic * 10 * 10 mV/A * 1.04)
Calculate Minimum Probe Output Voltage As:
V
probe min
= (Ic * 10 * 10 mV/A * 0.96) * 0.707
Probe Passes Test if:
V
probe min
≤ V
probe
≤ V
probe max
Test 4. DC Current Measurement Accuracy (100 mV/A range)
17 Configure the instruments as follows:
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Volts
Probe’s Range Selector Switch . . . . . . . . . . . . . . . . . . . .100 mV/A
18 Disconnect the probe from the coil and adjust the zero control to
minimize the probe's DC output voltage. Record this zero offset
voltage (V
) in Tabl e 9 on page 24.
z
19 Clamp the probe around the coil.
Ensure that the DC current direction in the coil matches the current
direction arrow on the probe. Position the probe as perpendicular as
possible to the coil.
20 Set up the Keysight 33120A as follows:
Waveform: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mVpp (minimum)
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.0 Vdc
21 Measure the current in the coil on DMM 1. Record this value (I
Tabl e 9.
The current in the coil must be ≥10 mA. Increase the generator offset if
necessary to achieve a current reading of at least 10 mA.
23
c
) in
Performance Verification
NOTE
22 Measure the voltage output (V
) by the probe on DMM 2, and
probe
record in Ta ble 9.
23 Do the calculations specified in Tab le 9 to determine if the probe
passes the test.
Table 9 DC Current Measurement Accuracy Record (100 mV/A range)
Measurement Recorded Value
Probe Zero Offset Voltage (Vz)
Current in Coil (Ic)
Probe Output Voltage (V
Calculate Maximum Probe Output Voltage As:
V
probe max
= (Ic * 10 * 100 mV/A * 1.03) + V
Calculate Minimum Probe Output Voltage As:
V
probe min
= (Ic * 10 * 100 mV/A * 0.97) + V
Probe Passes Test if:
V
probe min
≤ V
probe
≤ V
Test 5. AC Current Measurement Accuracy (100 mV/A range)
24 Change the DMM settings to:
25 Set up the Keysight 33120A settings to:
)
probe
z
z
probe max
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Volts
Waveform: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Vpp
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Vdc
26 Measure the current in the coil (Ic) on DMM 1 and record this in
Tabl e 10 on page 25.
The current in the coil must be ≥10 mA. Increase the generator offset if
necessary to achieve a current reading of at least 10 mA.
27 Measure the voltage output (V
) by the probe on DMM 2, and
probe
record in Ta ble 10.
24
Performance Verification
NOTE
28 Do the calculations specified in Table 10 to determine if the probe
passes the test.
Table 10 AC Current Measurement Accuracy Record (100 mV/A range)
Measurement Recorded Value
Current in Coil (Ic)
Probe Output Voltage (V
probe
)
Calculate Maximum Probe Output Voltage As:
V
probe max
= (Ic * 10 * 100 mV/A * 1.03)
Calculate Minimum Probe Output Voltage As:
V
probe min
= (Ic * 10 * 100 mV/A * 0.97)
Probe Passes Test if:
V
probe min
≤ V
probe
≤ V
probe max
Test 6. Bandwidth Check (100 mV/A range)
29 Increase the generated frequency to 100 kHz.
30 Measure the current in the coil (I
in Tabl e 11 on page 26.
The current in the coil must be ≥10 mA. Increase the generator offset if
necessary to achieve a current reading of at least 10 mA.
31 Measure the voltage output (V
record in Ta ble 11.
32 Do the calculations specified in Table 11 to determine if the probe
passes the test.
) and record the current reading
c
by the probe on DMM 2, and
probe)
25
Performance Verification
Table 11 Bandwidth Record (100 mV/A range)
Measurement Recorded Value
Current in Coil (Ic)
Probe Output Voltage (V
probe
)
Calculate Maximum Probe Output Voltage As:
V
probe max
= (Ic * 10 * 100 mV/A * 1.03)
Calculate Minimum Probe Output Voltage As:
V
probe min
= (Ic * 10 * 100 mV/A * 0.97) * 0.707
Probe Passes Test if:
V
probe min
≤ V
probe
≤ V
probe max
26
Index
Numerics
10 mV/A, 7
100 mV/A, 7
10-turn coil, 18
B
battery
indicator, 6
installation, 7
typical life, 16
battery power indicator, 6
battery, installing, 7
C
characteristics, 14
cleaning, 8
compatibility, 5
G
green indicator light, 6
H
Hall effect, 5
operating temperature range, 15
P
Peak Overload (OL) Indicator, 6
peak ratings, 7
probe, cleaning, 8
R
range selection switch, 6
red indicator light, 6
S
safety, 10
safety warnings, 10
specifications, 13
T
transformer wire, 18
Typical Frequency Response, 16
Typical Phase Shift Response, 17
V
verification, 18
I
indicator lights, 6
K
knob, 6
L
Linearity for a DC signal Range, 17
O
OL, 6
Operating, 15
W
warm up time, 18
WEEE Directive, 9
wire wrap, 18
Z
zero adjustment knob, 6
27
Keysight Technologies, Inc
Printed in Malaysia
Manual Part Number: 01146-92005
*01146-92005*
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