323/324/325

Clamp Meter

Users Manual

May 2012 Rev.1, 06/15

© 2012-2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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 LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for two
years from the date of purchase. This warranty does not cover fuses, disposable
batteries, or damage from accident, neglect, misuse, alteration, contamination, or
abnormal conditions of operation or handling. Resellers are not authorized to
extend any other warranty on Fluke’s behalf. To obtain service during the warranty
period, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that Service Center with a
description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH
AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED.
FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR
THEORY. Since some states or countries do not allow the exclusion or limitation of
an implied warranty or of incidental or consequential damages, this limitation of
liability may not apply to you.

11/99

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 Table of Contents

Title Page

Introduction ................................................................................................................. 1
How to Contact Fluke ................................................................................................. 1
Safety Information ...................................................................................................... 2
How to Clean the Product .......................................................................................... 9
Specifications ............................................................................................................. 10
Electrical Specifications .......................................................................................... 10
Mechanical Specifications ...................................................................................... 12
Environmental Specifications ................................................................................. 12
The Meter ................................................................................................................... 14

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 Introduction
The Fluke 323/324/325 Clamp Meter (the Product) measures ac and dc voltage, ac current,
resistance, and continuity. The 324 and 325 can also measure capacitance and contact
temperature. The 325 can also measure dc current and frequency. Note that the 325 is shown
in all of the illustrations. For temperature measurement, you must use the included K-Type
Thermocouple.

Warning

Read "Safety Information" before you use the Product.

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 323/324/325
Users Manual

Safety Information
A Warning identifies conditions and procedures that are dangerous to the user. A Caution
identifies conditions and procedures that can cause damage to the Product or the equipment
under test.

Table 1 tells you about symbols used on the Product and in this manual.

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 Clamp Meter
Safety Information

Warning
To prevent possible electrical shock, fire, or personal injury:
• Use the Product only as specified, or the protection supplied by the
Product can be compromised.
• Use only correct measurement category (CAT), voltage, and amperage
rated probes, test leads, and adapters for the measurement.
• Do not touch voltages > 30 V ac rms, 42 V ac peak, or 60 V dc.
• Carefully read all instructions.
• Hold the Product behind the tactile barrier. See Clamp Meter, item .
• Do not exceed the Measurement Category (CAT) rating of the lowest
rated individual component of a Product, probe, or accessory.
• Do not measure current while the test leads are in the input jacks.
• Do not use the Product around explosive gas, vapor, or in damp or wet
environments.
• Limit operation to the specified measurement category, voltage, or
amperage ratings.
• Do not work alone.

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 323/324/325
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• Do not apply more than the rated voltage, between the terminals or
between each terminal and earth ground.
• Comply with local and national safety codes. Use personal protective
equipment (approved rubber gloves, face protection, and flame-
resistant clothes) to prevent shock and arc blast injury where
hazardous live conductors are exposed.
• Replace the batteries when the low battery indicator shows to prevent
incorrect measurements.
• The battery door must be closed and locked before you operate the
Product.
• Measure a known voltage first to make sure that the Product operates
correctly.
• Remove all probes, test leads, and accessories that are not necessary
for the measurement.
• Only use probes, test leads, and accessories that have the same
measurement category and voltage rating as the Product.
• Keep fingers behind the finger guards on the probes.

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 Clamp Meter
Safety Information

• Connect the common test lead before the live test lead and remove the
live test lead before the common test lead.
• Remove all probes, test leads, and accessories before the battery door
is opened.
• Do not use the Product if it is damaged.
• Disable the Product if it is damaged.
• Do not use the Product if it operates incorrectly.
• Do not use test leads if they are damaged. Examine the test leads for
damaged insulation, exposed metal. Check test lead continuity.
• Before each use, examine the Product. Look for cracks or missing
pieces of the clamp housing. Also look for loose or weakened
components. Carefully examine the insulation around the jaws. See
Clamp Meter, item .
• Examine the case before you use the Product. Look for cracks or
missing plastic. Carefully look at the insulation around the terminals.
• Read all safety Information before you use the Product.

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 323/324/325
Users Manual

• Remove batteries to prevent battery leakage and damage to the Product

if it is not used for an extended period.
• Remove batteries to prevent battery leakage and damage to the Product
if is to be stored above its operating temperature.
• Do not use a current measurement as an indication that a circuit is safe
to touch. A voltage measurement is necessary to know if a circuit is
hazardous.
Caution
To avoid possible damage to the Product or to equipment under test, use a
thermocouple rated for the temperatures to be measured. The Product is
rated for -10.0 °C to +400.0 °C and 14 °F to 752 °F. The included type-K
thermocouple is rated to 260 °C.

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 Clamp Meter
Symbols

Symbols
Table 1. Symbols

Symbol Meaning Symbol Meaning

 AC (Alternating Current)  Earth

 DC (Direct Current)  AC and DC Current

Conforms to European Union

 directives.  WARNING. RISK OF DANGER.

 Battery  Consult user documentation.

WARNING. HAZARDOUS VOLTAGE.

 Double insulated  Risk of electric shock.
Certified by CSA Group to Conforms to relevant Australian
 North American safety  standards.
standards.
Application around and removal from
Certified by TÜV SÜD Product
 Service.  uninsulated hazardous live conductors
is permitted.

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Table 1. Symbols (cont.)

Symbol Meaning Symbol Meaning

Measurement Category II is
applicable to test and MEASUREMENT CATEGORY III is
measuring circuits connected applicable to test and measuring
 directly to utilization points  circuits connected to the distribution
(socket outlets and similar part of the building’s low-voltage
points) of the low-voltage MAINS installation.
MAINS installation.
MEASUREMENT CATEGORY
IV is applicable to test and
measuring circuits connected Conforms to relevant South Korean

at the source of the building’s
 EMC Standards.
low voltage MAINS installation.

This product complies with the WEEE Directive marking requirements. The
affixed label indicates that you must not discard this electrical/electronic product
in domestic household waste. Product Category: With reference to the
 equipment types in the WEEE Directive Annex I, this product is classed as
category 9 "Monitoring and Control Instrumentation" product. Do not dispose of
this product as unsorted municipal waste.

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 Clamp Meter
How to Clean the Product

Note
The Measurement Category (CAT) and voltage rating of combinations of test
probes, test probe accessories, current clamp accessories, and the Product is the
LOWEST rating of individual components.

How to Clean the Product

Regularly wipe the case with a damp cloth and weak detergent.

 Caution
To prevent damage to the Product, do not use abrasives or solvents to clean
the Product case.
To clean the Product Jaw:
1. Examine the jaw mating surface to make sure it is clean. If there is unwanted material
(including rust), jaw closure will not be correct and there will be measurement errors.

2. Open the jaws and clean the clamp metal ends with a lightly oiled cloth.

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 323/324/325
Users Manual

Specifications
Maximum voltage between
any Terminal and Earth Ground .............. 600 V
Range
323 .................................................... 400.0 A
324, 325 ............................................ (40.00, 400.0) A
Batteries .................................................. 2 AAA, NEDA 24A, IEC LR03
Operating Temperature ........................... -10 °C to +50 °C
Storage Temperature .............................. -30 °C to +60 °C
Operating Humidity ................................. Non Condensing (≤10 °C)
≤90 % RH (at 10 °C to 30 °C)
≤75 % RH (at 30 °C to 40 °C)
≤45 % RH (at 40 °C to 50 °C)
(Without Condensation)
Operating Altitude ................................... 2000 meters
Storage Altitude ...................................... 12,000 meters
Size (L x W x H) ..................................... (207 x 75 x 34) mm

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 Clamp Meter
Specifications

Weight
323 ..................................................... 265 g
324 ..................................................... 208 g
325 ..................................................... 283 g
Safety ...................................................... IEC 61010-1, Pollution Degree 2
IEC 61010-2-032: CATIV 300V / CATIII 600V
IEC 61010-2-033:CAT IV 300V / CAT III 600V
IP Rating ................................................. IEC 60529: IP30, non-operating
Electromagnetic Compatibility (EMC)
International IEC 61326-1: Portable, Electromagnetic Environment, IEC 61326-2-2
CISPR 11: Group 1, Class A
Group 1: Equipment has intentionally generated and/or uses
conductively-coupled radio frequency energy that is necessary for the
internal function of the equipment itself.
Class A: Equipment is suitable for use in all establishments other than
domestic and those directly connected to a low-voltage power supply
network that supplies buildings used for domestic purposes. There
may be potential difficulties in ensuring electromagnetic compatibility in
other environments due to conducted and radiated disturbances.

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 323/324/325
Users Manual

Emissions that exceed the levels required by CISPR 11 can occur

when the equipment is connected to a test object.
Korea (KCC) Class A Equipment (Industrial Broadcasting & Communication Equipment)
Class A: Equipment meets requirements for industrial electromagnetic
wave equipment and the seller or user should take notice of it. This
equipment is intended for use in business environments and not to be
used in homes.
USA (FCC) 47 CFR 15 subpart B. This product is considered an exempt device per
clause 15.103.
Temperature Coefficients ........................ Add 0.1 x specified accuracy for each degree C
above 28 °C or below 18 °C
Resolution
323 .................................................... 0.1 A
324, 325 ............................................ (0.01, 0.1) A
Accuracy
323, 325 ............................................ 2.0 % ±5 digits (45 – 65 Hz)
2.5 % ±5 digits (65 – 400 Hz)
324 .................................................... 1.5 % ±5 digits (45 Hz to 400 Hz)
Note
Add 2 % for position sensitivity.

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 Clamp Meter
Specifications

DC Current with Jaw (325)

Range ..................................................... (40.00, 400.0) A
Resolution ............................................... (0.01, 0.1) A
Accuracy ................................................. 2.0 % ± 5 digits
AC Voltage
Range ..................................................... 600.0 V
Resolution ............................................... 0.1 V
Accuracy (45 Hz– 400 Hz) ...................... 1.5 % ± 5 digits
DC Voltage
Range .................................................... 600.0 V
Resolution ............................................... 0.1 V
Accuracy ................................................. 1 % ± 5 digits
Resistance
Range
323, 324 ............................................. (400.0, 4000) Ω
325 ..................................................... (400.0, 4000, 40000) Ω
Resolution ............................................... (0.1, 1, 10) Ω
Accuracy ................................................. 1 % ±5 digits

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 323/324/325
Users Manual

Continuity Beeper
323 .................................................... ≤70 Ω
324/325 ............................................. ≤30 Ω
Capacitance (324, 325)
Range...................................................... (100.0, 1000) µF
Resolution ............................................... (0.1, 1) µF
Accuracy ................................................. 1 % ±4 digits
Frequency with Jaw (325)
Range...................................................... 5.0 to 500.0 Hz
Resolution ............................................... 0.1 Hz
Accuracy ................................................. 0.5 % ±4 digits
Trigger Level ........................................... 5 to 10 Hz, ≥10 A
10 to 100 Hz, ≥5 A
100 to 500 Hz, ≥10 A
Contact Temperature (324, 325)
Range...................................................... -10.0 °C to 400.0 °C
Resolution ............................................... 0.1 °C
Accuracy ................................................. 1 % ±8 digits
Note: Temperature uncertainty (accuracy) does not include error of the thermocouple probe.

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 Clamp Meter
The Meter

The Meter

TRUE RMS CLAMP METER

2

325

600 V
300 V
CAT
CAT
600 V

300 V
CAT
CAT

gtq008.eps

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 323/324/325
Users Manual

OFF

20

323 ON

k
MAXMIN C FHz VA AC
324/325 ON DC
F

gtq001.eps

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 Clamp Meter
The Meter

2:00

MIN
MAX ON
2:00

gtq002.eps

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 323/324/325
Users Manual

CAT
600 V
CAT CAT
300 V 600 V
CAT
300 V

323, 324

325

325
TRUE RMS CLAMP METER 325
TRUE RMS CLAMP METER

CAT 600 V
CAT 300 V
CAT 600 V
CAT 300 V

gtq003.eps

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 Clamp Meter
The Meter

323 V dc - V
323 V ac - V
324, 325
V dc & V ac -

V or V >30 V
CAT 300 V

gtq004.eps

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 323/324/325
Users Manual

CAT CAT
600 V 600 V
CAT CAT
300 V 300 V

325 325
TRUE RMS CLAMP METER TRUE RMS CLAMP METER

CAT 600 V CAT 600 V

CAT 300 V CAT 300 V

323 <70
324/325 <30

gtq005.eps

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 Clamp Meter
The Meter

HOLD

325
TRUE RMS CLAMP METER

CAT 600 V
CAT 300 V

> 30 V
20 V
AC/DC & ZERO

ZERO ZERO ZERO

2 sec
AC/DC AC/DC AC/DC

gtq006.eps

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 323/324/325
Users Manual

324, 325

325
TRUE RMS CLAMP METER

CAT 600 V
CAT 300 V

gtq009.eps

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 Clamp Meter
The Meter

AAA

gtq007.eps

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