Fluke 301A User manual
301A/301B/301C
Clamp Meter
Users Manual
July 2022 (English)
© 2022 Fluke Corporation. All rights reserved.
Specications are subject to change without notice.
All product names are trademarks of their respective companies.
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
i
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
Resistance/Continuity ........................................................................................7
Capacitance .......................................................................................................7
Test Diodes ........................................................................................................8
Amps AC ............................................................................................................8
Amps AC Measurement with Jaw................................................................8
Hz under Amps AC Measurement with Jaw.................................................8
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
1
Introduction
The Fluke 301A/301B/301C Clamp Meter (the Product) measures current and voltage, resistance,
continuity, diode, capacitance and frequency. The 301A/301B/301C can measure AC current. 301C
is TRUE RMS feature.
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
2
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.
WCaution
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
3
301A/301B/301C
Users Manual
Features/Controls
Table 1 is a list of features and controls.
Table 1. Feature/Control Descriptions
1
7
6
3
2
58 9
4
Item Description
1Jaw
2Tactile Barrier
3Hold
4Control Knob
5Display
6Extends the function selection to yellow items on the control knob. Push >2 s to turn on/
turn o the backlight.
7Trigger
8COM terminal
9Volts/Ohm input terminal
4
Clamp Meter
Before You Start
Display
Table 2 is a list of the display annunciators.
Table 2. Display
1
10
2
9
8
34 5 6
11
7
Item Description Item Description
1Hazardous voltage 6Auto Power o
2Diode test selected 7Low battery. Replace battery.
3Continuity selected 8DC or AC measurement
4Display hold enabled 9Farads for capacitance
5Zero indicatiaon 10 Unit of measurement for voltage or current
11 Unit of Resistance or Frequency
5
301A/301B/301C
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 show in display
means Auto power o is on.
To disable auto power o, see Power-On Options.
Backlight (301B/301C)
The display on the Clamp includes a backlight that improves the readability in dim work areas.
• 301B/301C: Push >2 s to toggle on/toggle o the backlight.
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.
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 Hold down when turn ON Clamp (rotate control knob).
Display shows .
Disable Auto Backlight O Hold down when turn ON Clamp (rotate control knob). Display
shows .
View rmware version and
light all LCD segments or button + ON (rotate control knob)
6
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 Clamp senses a voltage more +/- 30V or voltage overload( ) at voltage functions, and
even the HOLD function is selected, shows on the display to tell you a hazardous voltage is at the
Clamp input.
AC Voltage Measurement with Test Leads
To measure ac voltage:
1. Turn control knob to .
2. Connect the black test lead to the COM terminal and the red test lead to the Vterminal.
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 control knob to .
2. Push to shift to the Hz function.
3. Connect the black test lead to the COM terminal and the red test lead to the Vterminal.
4. Touch the probes to the test points of the circuit.
The display shows the measurement.
DC Voltage Measurement with Test Leads
To measure dc voltage:
1. Turn control knob to .
2. Connect the black test lead to the COM terminal and the red test lead to the Vterminal.
3. Touch the probes to the test points of the circuit.
The display shows the measurement.
7
301A/301B/301C
Users Manual
Resistance/Continuity
To measure resistance or 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 Vterminal.
4. Touch the probes to the test points of the circuit.
The display shows the value.
If the resistance is <70 , the beeper sounds continuously to indicate continuity. If the display
shows , 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 to shift to the function.
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 Vterminal.
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.
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