Keysight 1147B
50 MHz Current Probe
User’s Guide
Notices
CAUTION
WARNING
© Keysight Technologies, Inc. 2000- 2016, 2018
No part of this manual may be reproduced 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
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.
01147-97002
August 2018
Published in USA
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, including but not limited to the implied 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.
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 result 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
Introduction / 5
Safety / 6
Description of Parts / 11
Using the Probe / 13
Performance Verification for 1147B Probe / 17
Characteristics and Specifications / 21
Product Markings and Labels / 24
Service Strategy / 25
3
4
Introduction
Introduction
The 1147B is a wide-band, DC to 50 MHz, active current probe.
The probe features low noise and low circuit insertion loss. The
intelligent interface makes the probe ideal for use with the
InfiniiVision and Infiniium products using the AutoProbe interface.
This unique probe interface makes current measurements as
simple as those made with the active voltage probes.
The 1147B has two operating regions that provide a wide, flat
frequency response. In the DC to low frequency AC region, the
probe operation is based on the negative feedback of the amplifier
system that includes the thin film Hall element as a detector. In
the high frequency region, the probe operates as a current
transformer.
The 1147B is ideal for acquiring high transient time signals such
as those found in motor controllers, in switching power supplies,
and in current amplifiers driving inductive loads.
Features
Inspection
In order to use this product effectively and to ensure a long
operational life, read this user’s guide carefully and retain it for
future reference.
- Highly accurate current detection
- Split-core construction allows easy circuit connection
- Broadband frequency characteristics DC to 50 MHz
- Connects directly to InfiniiVision and Infiniium scope with
1M
Ω AutoProbe interface
- Easy to degauss and offset zero calibration
- Easy protect function at excessive input
- Carrying case
When the unit is delivered, check and make sure that it 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.
5
Safety
NOTE
WARNING
WARNING
WARNING
WARNING
Safety
This manual provides information and warnings essential for
operating this equipment in a safe manner and for maintaining it
in safe operating condition. Before using this equipment, be sure
to carefully read the following warnings, cautions, and notes.
This equipment is designed according to IEC 61010-1 Safety
Standards, and has been tested for safety prior to shipment.
Incorrect measurement procedures could result in injury or
death, as well as damage to the equipment. Please read this
manual carefully and be sure that you understand its contents
before using the equipment. The manufacturer disclaims all
responsibility for any accident or injury except that resulting due
to defect in its product.
Only trained service personnel who are aware of the hazard
involved (for example, fire and electric shock) should perform
maintenance on the instrument. When maintenance can be
performed without power applied, the power cord must be
disconnected from the instrument.
To avoid short circuits and accidents that could result in injury or
death, use the 1147B only with power lines carrying 300V or less.
When conductors being measured carry in excess of the safe
voltage level (SELV-E) and not more than 300V, to prevent short
circuits and electric shock while the core section is open, make
sure that conductors to be measured are insulated with material
conforming to (1) Overvoltage Category I
Requirements for Working Voltages of 300 V, and (3) Pollution
Degree 2. Never use this sensor on bare conductors, the core and
shield case are not insulated. If a bare conductor is inevitable to
be measured, make sure that the power to the wire must be
turned off, when opening the jaws of the probe to insert or
remove the bare wire so that 300V CAT I is always satisfied.
, (2) Basic Insulation
Avoid damaging the cable insulation surfaces while taking
measurements.
6
Safety
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
This instrument is only made for use with the Infiniium. Do not
plug the probe into any interface other than the AutoProbe
interface, of which Infiniium has a protective earthing with
double-insulation construction.
Take the following precautions to ensure that the Infiniium does
not form a bridge between the probe and any hazardous live part:
- Isolate the AutoProbe interface to which the probe is
connected from other AutoProbe interfaces using basic insulation
conforming to the overvoltage category, working voltage, and
pollution degree requirements of the circuit being tested.
- If basic insulation requirements cannot be met between the
AutoProbe interface to which this unit is connected and other
AutoProbe interfaces of the measuring instrument, make sure
that the voltage input to the AutoProbe interfaces does not
exceed the safe voltage level (SELV-E).
- Read and observe all warnings and precautions relating to
electrical safety for the Infiniium.
Refer to the following standards regarding the meanings of
underlined terms: IEC61010-1, IEC61010-2-031, and
IEC61010-2-032.
To prevent electric shock, do not allow the unit to become wet
and do not use the unit when your hands are wet.
The maximum continuous input range is based on heat that is
internally generated during measurement. Never input current in
excess of this level. Exceeding the rated level may result in
damage to the probe.
The maximum continuous input range varies according to the
frequency of the current being measured. See Figure 10 on page
23 in “Characteristics and Specifications”.
7
Safety
WARNING
WARNING
WARNING
WARNING
WARNING
If excess current is input, generated heat activates a built-in
safety function that blocks normal output. If this happens,
remove the input immediately (unclamp the sensor from the
conductor being measured or reduce the input current to zero).
Wait until the sensor has had sufficient time to cool before
resuming operation.
Even if the input current does not exceed the rated continuous
maximum, continuous input for an extended period of time may
result in activation of the safety circuit to prevent damage
resulting from heating of the sensor.
At high ambient temperatures, the built-in safety circuit may
activate at current input levels below the rated continuous
maximum.
Continuous input of current exceeding the rated maximum or
repeated activation of the safety function may result in damage
to the unit.
Do NOT measure current such that the total probe current
consumption exceeds the allowable AutoProbe interface current
consumption. The excess current consumption causes a
temporary shutdown of the Infiniium power supply for safety.
Quit the measurement and cycle the power of the Infiniium, if the
shutdown occurs. The typical probe current consumption from
the AutoProbe interface is shown in Figure 1 on page 9.
8
Safety
CAUTION
CAUTION
CAUTION
CAUTION
Figure 1 Typical Probe Consumption
Do not subject the unit to vibrations or shocks during transport or
handling. Be especially careful to avoid dropping the unit.
Do not store the unit where it will be exposed to direct sunlight,
high temperature, high humidity, or condensation. If exposed to
such conditions, the unit may be damaged, the insulation may
deteriorate, and the unit may no longer satisfy its specifications.
Before using the unit, inspect it and check the operation to make
sure that the unit was not damaged due to poor storage or
transport conditions. If damage is found, contact your dealer or
Keysight representative.
This unit is not constructed to be waterproof or dustproof, so do
not use it in a very dusty environment or in one where it will get
wet.
9
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