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301D/301E
Clamp Meter
Users Manual
Nov 2022, Rev.1, 4/2024 (English)
© 2024 Fluke Corporation. All rights reserved.
Specications 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
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. This warranty extends only to
the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable
batteries, or to any product which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or
damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate
substantially in accordance with its functional specications for 90 days and that it has been properly recorded on
non-defective media. Fluke does not warrant that software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only
but have no authority to extend a greater or dierent warranty on behalf of Fluke. Warranty support is available
only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international
price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product
purchased in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or
replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.
To obtain warranty service, 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 diculty, postage and insurance
prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product
will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused
by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including
overvoltage failures caused by use outside the product’s specied rating, or normal wear and tear of mechanical
components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work.
Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for
the repair and return transportation charges (FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF
DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation
of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every
buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of
competent jurisdiction, such holding will not aect the validity or enforceability of any other provision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
11/99
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Table of Contents
Title Page
Introduction ...............................................................................................................1
Contact Fluke ...........................................................................................................1
Safety .......................................................................................................................2
Before You Start .......................................................................................................2
Battery ................................................................................................................2
Features/Controls ...............................................................................................3
Display ...............................................................................................................4
Power .................................................................................................................5
Auto Power O ............................................................................................5
Backlight ......................................................................................................5
Power-On Options .......................................................................................5
Basic Measurements ................................................................................................6
Hazardous Voltage Indicator ..............................................................................6
AC Voltage Measurement with Test Leads ................................................................6
Hz under AC Voltage Measurement with Test Leads.................................................6
DC Voltage Measurement with Test Leads ....................................................................6
Continuity ...........................................................................................................7
Resistance .........................................................................................................7
Capacitance .......................................................................................................7
Test Diodes ........................................................................................................8
Amps AC ............................................................................................................8
Amps AC Measurement with Jaw ................................................................8
Hz under Amps AC Measurement with Jaw.................................................8
Amps DC ............................................................................................................9
Amps DC Measurement with Jaw ...............................................................9
Measurement Features ............................................................................................9
Display Hold .......................................................................................................9
Firmware Version ......................................................................................................9
Maintenance ...........................................................................................................10
How to Clean the Case ....................................................................................10
Environmental ..................................................................................................10
Service .............................................................................................................10
Specications .........................................................................................................11
General ............................................................................................................11
Safety ...............................................................................................................12
Accuracy Specications ...................................................................................13
Continuity Threshold ........................................................................................13
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Introduction
The Fluke 301D/301E Clamp Meter (the Product) measures current and voltage, resistance,
continuity, diode, capacitance and frequency. The 301D/301E can measure AC and DC current.
Contact Fluke
Fluke Corporation operates worldwide. For local contact information, go to our website:
www.uke.com.
To register your product, view, print, or download the latest manual or manual supplement, go to our website.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
+1-425-446-5500
uke-info@uke.com
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Clamp Meter
Safety
Safety
General Safety Information is in the printed Safety Information document that ships with the Product
and at www.uke.com. More specic safety information is listed where applicable.
A Warning identies conditions and procedures that are dangerous to the user. A Caution identies
conditions and procedures that can cause damage to the Product or the equipment under test.
Before You Start
Battery
XW
Warning
To prevent personal injury and for safe operation of the Product:
• The battery door must be closed and locked before you operate the Product.
• Remove all probes, test leads, and accessories before the battery door is opened.
• Replace the batteries when the low battery indicator shows to prevent
incorrect measurements.
• When batteries are changed, ensure that the calibration seal in the battery compartment
is not damaged. If damaged, the Product may not be safe to use. Return the Product to
Fluke for replacement of the seal.
W
Caution
To prevent damage to the battery:
• Repair the Product before use if the battery leaks.
• Do not expose battery to heat sources or high-temperature environments such as an
unattended vehicle in the sun.
• Always operate in the specied temperature range.
• Do not incinerate the Product and/or battery.
The Product ships with the batteries. To replace batteries, see Figure 1.
Figure 1. Battery Replacement
AAA
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301D/301E
Users Manual
Features/Controls
Table 1 is a list of features and controls.
Table 1. Feature/Control Descriptions
1
V003
600A
7
2
3
4
6
5
Item Description
1
Jaw
8 9
2
3
4
5
6
7
8
9
Tactile Barrier
Hold
Control Knob
Display
Extends the function selection to yellow items on the control knob. Push >2 s to turn on/
turn o the backlight.
Trigger
COM terminal
Volts/Ohm input terminal
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Display
1
10
2
9
8
3
4 5 6
11
7
Table 2 is a list of the display annunciators.
Clamp Meter
Before You Start
Table 2. Display
Item Description Item Description
10
6
Auto Power o
7
Low battery. Replace battery.
8
DC or AC measurement
9
Farads for capacitance
Unit of measurement for voltage or current
11
1
Hazardous voltage
2
Diode test selected
3
Continuity selected
4
Display hold enabled
5
Zero indication
Unit of Resistance or Frequency
4
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301D/301E
Users Manual
Power
Two AAA batteries supply power to the Clamp:
• To turn on the Clamp, rotate the control knob from OFF to a function.
• To turn o the Clamp, rotate the control knob to OFF.
Auto Power O
The Clamp automatically powers o after 20 minutes of no use. If the Clamp automatically powers
o, turn the control knob to OFF and then to a function to resume operation. The
display means Auto power o is on.
To disable auto power o, see Power-On Options.
Backlight
The display on the Clamp includes a backlight that improves the readability in dim work areas.
shown in the
• Push
The backlight has an auto o feature that turns o the backlight after 2 minutes of no use. To disable
the auto o backlight feature, see Power-On Options.
>2 s to toggle on/toggle o the backlight.
Power-On Options
Power-on options allow you to customize the controls:
• Disable Auto Power O
• Disable Auto Backlight O
• View rmware version and light all LCD segments
To select a power-on option:
1. Turn o the Clamp.
2. See Table 3 for option and button sequence.
Table 3. Power-On Options
Option Button Sequence
Disable Auto Power O
Disable Auto Backlight O
+ ON (rotate control knob). Display shows .
button + ON (rotate control knob). Display shows .
View rmware version and
light all LCD segments
5
or button + ON (rotate control knob)
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Clamp Meter
Basic Measurements
Basic Measurements
XW
Warning
To prevent possible electrical shock, re, or personal injury:
• Hold the Product behind the tactile barrier.
• Do not measure current while the test leads are in the input jacks.
Hazardous Voltage Indicator
When the Product senses a voltage more than ±30V or a voltage overload( ) at voltage functions,
even if the HOLD function is selected, shows on the display to tell you a hazardous voltage is at
the Product input.
AC Voltage Measurement with Test Leads
To measure ac voltage:
1. Turn the control knob to .
2. Connect the black test lead to the COM terminal and the red test lead to the VΩ terminal.
3. Touch the probes to the test points of the circuit.
The display shows the ac voltage.
Hz under AC Voltage Measurement with Test Leads
To measure Hz:
1. Turn the control knob to .
2. Push
3. Connect the black test lead to the COM terminal and the red test lead to the VΩ terminal.
4. Touch the probes to the test points of the circuit.
The display shows the measurement.
to shift to the Hz function.
DC Voltage Measurement with Test Leads
To measure dc voltage:
1. Turn the control knob to .
2. Connect the black test lead to the COM terminal and the red test lead to the VΩ terminal.
3. Touch the probes to the test points of the circuit.
The display shows the measurement.
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301D/301E
Users Manual
Continuity
To measure continuity:
1. Turn the control knob to
2. Remove power from the circuit to test.
3. Connect the black test lead to the COM terminal and the red test lead to the VΩ terminal.
4. Touch the probes to the test points of the circuit.
If the resistance is <30 , the beeper sounds continuously to indicate continuity. if the display
shows
, the circuit is open.
.
Resistance
To measure resistance:
1. Turn the control knob to
2. Push
3. Remove power from the circuit to test.
4. Connect the black test lead to the COM terminal and the red test lead to the VΩ terminal.
5. Touch the probes to the test points of the circuit.
The display shows the value.
If the display shows
to shift to the function.
, the circuit is open or higher than the measurement range.
.
Capacitance
The Clamp determines capacitance by charging a capacitor with a known current, measuring the
resulting voltage, then calculating the capacitance.
Note
A good capacitor stores an electrical charge and may remain energized after power is
removed. Before you touch the capacitor or make a measurement, turn all power OFF,
use the Product to conrm that power is OFF, and carefully discharge the capacitor by
connecting a resistor across the leads. Be sure to wear appropriate personal
protective equipment.
To measure capacitance:
1. Turn the control knob to
2. Push
3. Remove the capacitor from the circuit and discharge the capacitor.
4. Connect the black test lead to the COM terminal and the red test lead to the VΩ terminal.
5. Touch the probes to the capacitor leads.
The display shows the measurement.
indicates the capacitor is faulty or the capacitance value is higher then the
measurement range.
twice to shift to the function.
.
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Test Diodes
W
Caution
To prevent possible damage to the Product or to the equipment under test,
disconnect circuit power and discharge all high-voltage capacitors before you
test diodes.
To test a diode:
Clamp Meter
Basic Measurements
1. Turn the rotary switch to
2. Push
3. Connect the red test lead to the VΩ terminal and the black test lead to the COM terminal.
4. Connect the red probe to the anode side and the black test lead to the cathode side of the
diode under test.
5. See the display for the forward bias voltage value.
6. If you reverse the polarity of the test leads with diode polarity, the display reading shows
Use this reading to distinguish the anode and cathode sides of a diode.
three times to shift to function.
.
.
Amps AC
XW
Warning
To prevent electrical shock, do not measure current while the test leads are in the input jacks.
Amps AC Measurement with Jaw
To measure amps ac:
1. Turn the control knob to .
2. Position the Clamp jaw around the conductor.
The display shows the amps ac measurement.
Hz under Amps AC Measurement with Jaw
To measure Hz:
1. Turn the control knob to .
2. Push
3. Position the Clamp jaw around the conductor.
The display shows the measurement.
to shift to the Hz function.
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301D/301E
Users Manual
Amps DC
XW
Warning
To prevent electrical shock, do not measure current while the test leads are in the input jacks.
Amps DC Measurement with Jaw
To measure amps dc:
1. Turn the control knob to .
2. Push
3. Position the Clamp jaw around the conductor.
The display shows the amps dc measurement.
Note: Do the zero action after "Zero" indication disappeared.
to compensate (zero) not clamp any conductor.
Measurement Features
This section is about the Clamp features you can use for measurements.
XW
Warning
To prevent possible electrical shock, re, or personal injury:
• Do not use the HOLD function to measure unknown potentials. When HOLD is turned
on, the display does not change when a dierent potential is measured.
• Disconnect power and discharge all highvoltage capacitors before you measure
continuity, resistance, capacitance, or a diode junction.
Display Hold
To capture and hold the display reading, push . The display freezes the readings and is
continuously on. The Product reminds you that the measurement is not live. When in HOLD mode,
if the Product senses a voltage more than ±30 V or a voltage overload (
to tell you a hazardous voltage is at the Product input.
), shows on the display
When in HOLD mode, push
again to resume normal operation with live readings.
Firmware Version
To nd the rmware version for the Clamp, see Power-On Options.
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Clamp Meter
Maintenance
Maintenance
The Product does not require routine maintenance.
XW
Warning
To prevent possible electrical shock, re, or personal injury:
• Remove the input signals before you clean the Product.
• Repair the Product before use if the battery leaks. Battery leakage may create a shock
hazard or damage the Product.
• Use only specied replacement parts.
• Have an approved technician repair the Product.
• Remove the batteries if the Product is not used for an extended period of time, or if stored
in temperatures above 50 °C. If the batteries are not removed, battery leakage may result.
How to Clean the Case
Wipe the case with a damp cloth and mild detergent.
W
Caution
Do not use abrasives, isopropyl alcohol, or solvents to clean the case or
lens/window.
Environmental
This Product has electronic printed circuit boards. Dispose of the Product in a professional and
environmentally appropriate manner. Delete personal data on the Product before disposal.
Remove batteries that are not integrated into the electrical system before disposal and dispose of
batteries separately.
If this Product has an integral battery, put the entire Product in the electrical waste.
See Contact Fluke for more information.
Service
Have an authorized Fluke Calibration service center service the Product at one-year intervals to
maintain optimum performance. Contact your equipment distributor or authorized Fluke Calibration
Service Center for any equipment performance failure or to schedule regular maintenance service.
See Contact Fluke for more information.
Table 4 is a list of the available replacement parts.
Table 4. Replacement Parts
Item Quantity Fluke Part Number
BATTERY AAA1.5V PACKING 1 5128983
Battery Door 1 5336951
TL75, Test lead with two caps 1 4306653
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301D/301E
Users Manual
Specications
General
Maximum Voltage
Between any Terminal and Earth Ground ............... 300 V
Between V/Ω Terminal and COM Terminal ............. 600 V
Display (LCD) ............................................................ 6000 counts, updates 3/sec
Battery
Type .........................................................................2 AAA IEC LR03 alkaline
Life ........................................................................... 80 hours
Automatic Power O ............................................... 20 minutes
Temperature
Operating ................................................................. -10 °C to 50 °C
Storage .................................................................... -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)
Altitude
Operating ................................................................. 2000 m
Storage .................................................................... 12 000 m
Temperature Coecient .......................................... 0.1 x (specied accuracy) /°C (<18 °C or >28 °C)
Size (L x W x H) ........................................................ 190 mm x 52 mm x 16 mm
Size (L x W x H with barrier and trigger) ...............
Weight (with batteries) ............................................ 154 g
Jaw Opening ............................................................. 34 mm
Ingress Protection (IP) Rating ................................ IEC 60529: IP30 non-operating
190 mm x 68 mm x 22 mm
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Clamp Meter
Specications
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
diculties in ensuring electromagnetic compatibility in other
environments due to conducted and radiated disturbances.
Caution: This equipment is not intended for use in residential
environments and may not provide adequate protection to
radio reception in such environments.
Korea (KCC) ........................................... Class A equipment (Industrial Broadcast &
Communications 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.
Safety
General .................................................. IEC 61010-1, Pollution Degree 2
Measurement ........................................ IEC 61010-2-032: CAT III 300V
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301D/301E
Users Manual
Accuracy Specications
Accuracy is specied for 1 year after calibration, at operating temperatures of 18 °C to 28 °C,
relative humidity at 0 % to 90 %. Accuracy specications take the form of:
±([% of Reading] + [Number of Least Signicant Digits]).
Function Range Resolution
AC Volts (45 to 400 Hz)
Voltage Frequency (Hz)
1 Hz~99.99 kHz
Threshold 10.0 V
DC Volts
Resistance (Ohms)
Capacitance
Diode
AC Current
(45 to 400 Hz)
Accuracy
301D 301E
600.0 V 0.1 V 1.5 %+5 1.5 %+5
9.999 Hz
99.99 Hz
999.9 Hz
9.999 kHz
99.99 kHz
0.001 Hz
0.01 Hz
0.1 Hz
0.001 kHz
0.01 kHz
0.1 %+3 0.1 %+3
600.0 V 0.1 V 1 %+5 1 %+5
600.0 Ω
6.000 kΩ
60.00 kΩ
9.999 uF
99.99 uF
999.9 uF
0.1 Ω
0.001 kΩ
0.01 kΩ
0.001 uF
0.01 uF
0.1 uF
1 %+5 1 %+5
2 %+5
5 %+5
5 %+5
3.000 V 0.001 V 10 % 10 %
60.00 A
600.0 A
1000 A
[2]
0.01 A
0.1 A
1 A
2 %+10
2 %+5
NA
2 %+5
5 %+5
5 %+5
2 %+10
2 %+5
2 %+5
AAC Frequency (Hz)
Threshold 10.00 A
[1]
DC Current
45.0-400.0 Hz 0.1 Hz 0.1 %+3 0.1 %+3
60.00 A
600.0 A
1000 A
Note:
[1] After zero operation.
[2] <1% range, unspecied.
Continuity Threshold
Function Threshold
Continuity Threshold 30 Ω
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[2]
0.01 A
0.1 A
1 A
2 %+10
2 %+5
NA
2 %+10
2 %+5
2 %+5
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