Agilent Technologies 34134A Manual de usuario

User’s Guide

Publication number 34134-90001

April 2009

For Safety information, Warranties, Regulatory information, and publishing information, see the

pages at the back of this book.

©Copyright Agilent Technologies 1999, 2009

34134A AC/DC DMM Current Probe

34134A.book Page 1 Wednesday, March 25, 2009 4:09 PM

Contents

Inspect the probe

❏Inspect the shipping container for damage.

Keep a damaged shipping container or cushioning material until the contents of the

shipment have been checked for completeness and the probe has been checked

mechanically and electrically.

❏Inspect the instrument.

• If there is mechanical damage or defect, or if the probe does not operate properly

or pass performance tests, notify your Agilent Sales Office.

• If the shipping container is damaged, or the cushioning materials show signs of

stress, notify the carrier as well as your Agilent Sales Office. Keep the shipping

materials for the carrier’s inspection. The Agilent office will arrange for repair or

replacement at Agilent’s option without waiting for claim settlement.

Inspect the probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Control and Connector Identification Information . . . . . 3

Specifications and characteristics . . . . . . . . . . . . . . . . . . . . . 4

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 4

Environmental Characteristics. . . . . . . . . . . . . . . . . . . . . 5

Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . 5

Safety Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

To check/replace the battery . . . . . . . . . . . . . . . . . . . . . . 8

Cleaning the probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . 13

34134A.book Page 2 Wednesday, March 25, 2009 4:09 PM

34134A AC/DC DMM Current Probe

The 34134A Current Probe measures low DC or AC from 10 mA to 50 A DC,

40 A AC. This battery-powered clamp-on probe may be used with digital multimeters,

voltmeters, or other voltage-measuring instruments. The probe jaws clamp around the

conductor under test, allowing current measurements without breaking the circuit.

Hall sensor technology senses the magnetic field produced by the current measured,

and generates a millivolt DC or AC output signal. The narrow jaw is designed for

optimum use in crowded wiring in industrial and automotive environments.

Compatibility

The 34134A Current Probe is compatible with any DMM, or other voltage measuring

instrument which has the following features:

• Range and resolution capable of displaying 1 mV of input.

• Voltmeter accuracy (uncertainty) of 0.75% or better to take full advantage of the

accuracy of the probe.

• Minimum input impedance of 100 k (1 V/A range) or 10 k (10 mV/A range).

• Input jacks that accept 4mm shrouded banana plugs.

Control and Connector Identification

ΩΩ

Battery Compartment Cover

Power Indication LED

Zero Adjust Knob Range Selection Switch

= 11.8mm∅

34134A.book Page 3 Wednesday, March 25, 2009 4:09 PM

34134A AC/DC DMM Current Probe

Specifications and characteristics

Operating and environmental characteristics of the 34134A Current Probes are

shown below.

Electrical Specifications

1 V/A Range (1 mV/mA) 10 mV/A Range

Current Range DC: 10 mA to 2 A

AC: 10 mA to 1.5 A

DC: 100 mA to 80 A

AC: 100 mA to 60 A

Output Signal (AC/DC) 1 mV/mA (2 V @ 2 A) 10 mV/A

Accuracy* 2% reading 5mA 500 mA to 50 A DC/40 A

AC: 4% reading 20 mA

50 to 80A DC: ±12%

reading

0 to 60A AC: ±12% reading

Frequency Range DC to 8 kHz @ -3 dB DC to 8 kHz

Phase Shift DC to 65 Hz: 1 DC to 65 Hz: 1

Minimum Input Resistance

of Instrument

100 k 100 k

Noise DC to 1 Hz: 1.5 mV

1 Hz to 10 kHz: 14 mV

0 kHz to 100 kHz: 18 mV

DC to 1 Hz: 15 V

1 Hz to 10 kHz: 140 V

0 kHz to 100 kHz: 180 V

Slew Rate @ 5 A 120 mV/ s 5.5 mV/ s

* Accuracies are given for an ambient temperature of 23 °C ±3 °C, relative humidity of 20 to 75%,

conductor centered in jaw window, probe zeroed, no hysteresis in DC, DC to 40 to 100Hz sine wave (1mV/

mA range) or DC and 40 to 1 kHz sine wave (10mV/A range), 1 minute warm-up, battery at 9V, appropriate

load impedance, magnetic field <40A/m and no common mode.

± ±

°°

ΩΩ

µµ

34134A.book Page 4 Wednesday, March 25, 2009 4:09 PM

34134A AC/DC DMM Current Probe

Specifications and characteristics

Typical Frequency Response Curve

Voltage vs Frequency Response Curve

Environmental Characteristics

Mechanical Characteristics

Operating Temperature 0 to 50°C

Storage Temperature -30 to 80°C

Operating relative

humidity

0 to 50 °C, 0 to 85% relative humidity

Temperature Coefficient 800 ppm per °C +10 mA/°C typical from -10 to 50°C

Altitude Operating: 0 to 2000 m

Non-operating: 0 to 12,000 m

Zero Adjustment 20 turn potentiometer

Maximum cable diameter 11.8 mm

Dimensions 67 x 231 x 36 mm

Weight 330g with battery

Color Grey

Material Fiberglass charged polycarbonate

Output Cable 1.5m double insulated lead with shielded banana plugs

34134A.book Page 5 Wednesday, March 25, 2009 4:09 PM

34134A AC/DC DMM Current Probe

Specifications and characteristics

Safety Specifications

This symbol signifies that the 34134A AC/DC DMM Current Probe is

protected by double or reinforced insulation. Only use specified replacement

parts when servicing the instrument.

This symbol signifies CAUTION! and requests that the user refer to the user

manual before using the instrument.

WARNING SHOCK HAZARD!

• Connect the probe to the DMM or voltage measuring instrument before clamping

the probe around a conductor.

• Never use the probe on circuits rated higher than 660 V.

• Never leave the probe clamped around a conductor while not connected to a voltage

measuring instrument or DMM.

• Carefully center the conductor inside the probe jaws and make sure that the probe

is perpendicular to the conductor before closing the jaws.

• Avoid, if possible, the proximity of other conductors which may create noise.

• 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.

Working voltage 600 V CAT III

Case protection IP20 per IEC 529

Drop test 1m according to IEC 68-2-32

Mechanical shock 100 G: test per IEC 68-2-27

Vibration Test per IEC 68-2-6 frequency range 10 Hz to 55 Hz,

amplitude: 0.15mm

34134A.book Page 6 Wednesday, March 25, 2009 4:09 PM

34134A AC/DC DMM Current Probe

Operation

1 Connect the probe to the multimeter or other instrument.

CAUTION Be sure to observe the polarities: red = positive terminal, black = common terminal.

2 Select the multimeter range which best corresponds to the measured current.

For better reading stability, you may use the DMM 2 Volt range and let the probe “warm

up” for one minute before zeroing.

The Current Probe has a dual output, DC V output in DC and AC V output in AC.

• The “1 V/A” range has an output signal of 1 mV/mA AC/DC with an output of 2

volts representing 2 amps present in the conductor being measured.

• The “10 mV/A” range has an output signal of 10 mV/A AC/DC with an output of

500 millivolts representing 50 amps present in the conductor being measured.

3 Zero the probe in DC and in DC coupled AC measurements.

When the 34134A Current Probe has been used for a current measurement and then

removed from the conductor, a small amount of residual magnetism often remains in

the core. This residual magnetism will cause the voltmeter to show a small DC reading

even though there is no current passing through the jaws of the probe. The residual

magnetism should not cause a problem for AC current measurement because the AC

voltage function in most multimeters is AC coupled. DC offset caused by the residual

magnetism will contribute to reading errors, but can be minimized by using the zero

adjust knob to show a reading of 0 a few counts on the multimeter (probe not clamped

on a conductor).

There will always be some instability and noise generated by the Hall sensor, the earth

magnetic field and environmental noise. This is particularly noticeable on the most

sensitive range, 1 V/A (1 mV/mA), where you may have up to 5 mV of uncertainty,

which cannot be “zeroed out.” “Zero” the probe while it is connected to the DMM and

on the range to be used. Let the probe warm-up for one minute before zeroing. Turn

the zero adjustment knob until the probe is zeroed.

4 Observe the output polarities for DC measurement.

5 Clamp the probe on the conductor to be measured and read the current flowing

directly on your meter.

The output of the probe is 10 mV/A AC/DC or 1 mV/mA AC/DC. If your meter

indicates a negative reading during DC measurements, this simply means that the

current flow is in the opposite direction of the arrows marked “I” on the probe or that

the probe connections are reversed (polarity).

6 After measurement, turn the probe OFF.

34134A.book Page 7 Wednesday, March 25, 2009 4:09 PM

34134A AC/DC DMM Current Probe

Calibration

To guarantee that your instrument complies with the factory specifications, we

recommend that the 34134A Current Probe be submitted to your local Agilent

Service Center at one year intervals for recalibration, or as required by other standards.

Repair

This probe contains no user serviceable parts. Please return to your local Agilent

Service Center for repair.

To check/replace the battery

When the probe is turned on, the green LED should light up. If not, replace the 9 V

battery.

1 Disconnect the probe from the circuit and the DMM.

2 Turn the probe “OFF.”

3 Unscrew the battery compartment screw and pull out the battery compartment

cover.

4 Replace the battery and put the cover back up.

CAUTION Do not replace the battery while the probe is in use.

Cleaning the probe

Be sure that the mating surfaces of the jaw are free of dirt or foreign matter. If they are

rusted, gently clean with a soft, lightly oiled cloth.

34134A.book Page 8 Wednesday, March 25, 2009 4:09 PM

1999, 2009

Reproduction, adaptation, or

translation without prior

written permission is

prohibited, except as allowed

under the copyright laws.

Restricted Rights Legend.

Use, duplication or disclosure

by the U.S. Government is

subject to restrictions as set

forth in subparagraph (c) (1)

(ii) of the Rights in Technical

Data and Computer Software

clause at DFARS 252.227-

7013 for DOD agencies, and

subparagraphs (c) (1) and (c)

(2) of the Commercial

Computer Software Restricted

Rights clause at FAR 52.227-

19 for other agencies.

Document Warranty

The information contained in

this document is subject to

change without notice.

Agilent makes no warranty

of any kind with regard to

this material, including, but

not limited to, the implied

warranties of

merchantability or fitness

for a particular purpose.

Agilent shall not be liable for

errors contained herein or for

damages in connection with

the furnishing, performance,

or use of this material.

Product Warranty

This Agilent product has a

warranty against defects in

material and workmanship for

a period of three years from

date of shipment. During the

warranty period, Agilent will,

at its option, either repair or

replace products that prove to

be defective.

For warranty service or repair,

this product must be returned

to a service facility designated

by Agilent.

For products returned to

Agilent for warranty service,

the Buyer shall prepay

shipping charges to Agilent

and Agilent shall pay shipping

charges to return the product

to the Buyer. However, the

Buyer shall pay all shipping

charges, duties, and taxes for

products returned to Agilent

from another country.

Agilent warrants that its

software and firmware

designated by Agilent for use

with an instrument will

execute its programming

instructions when properly

installed on that instrument.

Agilent does not warrant that

the operation of the

instrument software, or

firmware will be

uninterrupted or error free.

Limitation of Warranty

The foregoing warranty shall

not apply to defects resulting

from improper or inadequate

maintenance by the Buyer,

Buyer-supplied software or

interfacing, unauthorized

modification or misuse,

operation outside of the

environmental specifications

for the product, or improper

site preparation or

maintenance.

No other warranty is

expressed or implied.

Agilent specifically

disclaims the implied

warranties of

merchantability or fitness

for a particular purpose.

Exclusive Remedies

The remedies provided herein

are the buyer's sole and

exclusive remedies.

Agilent shall not be liable for

any direct, indirect, special,

incidental, or consequential

damages, whether based on

contract, tort, or any other

legal theory.

Assistance

Product maintenance

agreements and other

customer assistance

agreements are available for

Agilent products.

For any assistance, contact

your nearest Agilent Sales

Office.

Certification

Agilent certifies that this

product met its published

specifications at the time of

shipment from the factory.

Agilent further certifies that

its calibration measurements

are traceable to the United

States National Institute of

Standards and Technology,

to the extent allowed by the

Institute's calibration facility,

and to the calibration facilities

of other International

Standards Organization

members.

34134A.book Page 0 Wednesday, March 25, 2009 4:09 PM

Safety

This apparatus has been

designed and tested in

accordance with IEC

Publication 1010, Safety

Requirements for Measuring

Apparatus, and has been

supplied in a safe condition.

To ensure safe operation and

to keep the product safe, the

information, cautions, and

warnings in this operating

manual must be heeded. In

addition, note the external

markings on the instrument

that are described under

"Safety Symbols."

Safety Symbols

Instruction manual symbol:

the product is marked with

this symbol when it is

necessary for you to refer to

the instruction manual in

order to protect against

damage to the product.

Hazardous voltage symbol.

Earth terminal symbol: Used

to indicate a circuit common

connected to grounded

chassis.

This symbol signifies that the

34134A AC/DC DMM

Current Probe is protected by

double or reinforced

insulation. Only use specified

replacement parts when

servicing the instrument.

WARNING

The Warning sign denotes a

hazard. It calls attention to a

procedure, practice, or the

like, which, if not correctly

performed or adhered to,

could result in personal

injury. Do not proceed

beyond a Warning sign until

the indicated conditions are

fully understood and met.

CAUTION

The Caution sign denotes a

hazard. It calls attention to an

operating procedure, practice,

or the like, which, if not

correctly performed or

adhered to, could result in

damage to or destruction of

part or all of the product. Do

not proceed beyond a Caution

symbol until the indicated

conditions are fully

understood or met.

About this edition

This is the 34134A AC/DC

DMM Current Probe

User’s Guide.

Publication number

34134-90001, April 2009

Printed in USA.

Print history is as follows:

34134-90001, April 2009

34134-90001, Nov. 1999

New editions are complete

revisions of the manual.

Many product updates do

not require manual changes;

and, conversely, manual

corrections may be done

without accompanying

product changes. Therefore,

do not expect a one-to-one

correspondence between

product updates and manual

updates.

34134A.book Page 1 Wednesday, March 25, 2009 4:09 PM

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