Instruction Manual
3280-10F
3280-20F
AC CLAMP METER
EN/ES/FR/DE/IT
Nov. 2015 Edition 1
3280H980-00 15-11H
OK NO
OK NO
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2 2
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1
CT6280
3
4
3280H980-00
Measure-1
OK
NO
NO
NO
NO
Measure-2
1 1
OK
NO
OK
2 2
3 3
Black (−)
Red (+)
Red (+)
Black (−)
Measure-3
1 1
2 2
3 3
4 4
Measure-4
English (EN)
Español (ES)
Français (FR)
Deutsch (DE)
Italiano (IT)
Contents
Introduction ..............................................1
Safety Notes .............................................1
Inspection Before Measurement ............8
Maintenance/Inspection ..........................9
Insert/Replace Batteries ..........................9
Functions ...............................................10
Parts Names ...........................................11
Specifi cations ........................................13
General Specifi cations ..........................13
Basic Specifi cations ..............................15
Function Specifi cations .........................17
Accuracy Specifi cations ........................17
3280H980-00
EN-i
Contents
EN-ii
Introduction
Introduction
Thank you for purchasing the Hioki 3280-10F,
3280-20F AC Clamp Meter. To obtain maximum
performance from the instrument, please read this
manual fi rst, and keep it handy for future reference.
3280-10F
3280-20F True RMS measurement model
Average value measurement RMS conversion
model
Safety Notes
This instrument is designed to conform to IEC 61010
Safety Standards, and has been thoroughly tested
for safety prior to shipment. However, using the
instrument in a way not described in this manual
may negate the provided safety features. Before
using the instrument, be certain to carefully read the
following safety notes.
Notation
In this document, the risk seriousness and the
hazard levels are classifi ed as follows.
DANGER
WARNING
CAUTION
Imminent risk of operator death
or serious injury
Potential for operator death or
serious injury
Potential for minor operator
injury or device damage or
malfunction
EN-1
Safety Notes
Risk of electric shock
Prohibited actions
Actions that must be performed
Symbols affi xed to the device
Precaution or hazard (See corresponding
topic.)
Risk of electric shock
Protected throughout by double insulation
or reinforced insulation
Device may be connected to or
disconnected from a live conductor
Flexible sensors can be connected to or
disconnected from live conductors when
using appropriate protective insulation.
Other sensors can only be connected to
or disconnected from insulated conductors
suited to the voltage of the conductor under
measurement.
Grounding terminal
DC (direct current)
AC (alternating current)
EN-2
Safety Notes
Measurement categories
This instrument’s current measurement part
conforms to the safety requirements for CAT III 600 V,
and the voltage measurement part conforms to the
safety requirements for CAT II 600 V, CAT III 300 V
measuring instruments.
Distribution panel
Service entrance
Service drop
CAT IV
Power meter
Internal wiring
CAT III
Fixed Installation
CAT II
Outlet
DANGER
Measuring a location with a higher
category number than the measurement
category indicated on this device may
result in a serious accident such as
electric shock.
To avoid electric shock, do not touch
the portion beyond the protective
barrier during use.
Never apply voltage to the test leads
when the resistance and continuity
functions are selected. Doing so may
damage the instrument and result
in bodily injury. To avoid electrical
accidents, remove power from the
circuit before measuring.
EN-3
Safety Notes
WARNING
• To avoid electric shock, short circuits
and damage to the instrument,
disconnect the test leads from the
measurement object before switching
the rotary switch.
• To prevent electric shock, when
measuring the voltage of a power
line use a test lead that satisfi es the
following criteria:
• Conforms to safety standards
IEC61010 or EN61010
• Of measurement category III or IV
• Its rated voltage is higher than the
voltage to be measured
• The optional test leads for this
instrument conform to the safety
standard EN61010. Use a test lead
in accordance with its defi ned
measurement category and rated
voltage.
EN-4
Safety Notes
WARNING
• Installing the instrument in
inappropriate locations may cause
a malfunction of instrument or may
give rise to an accident. Avoid the
following locations:
• Exposed to direct sunlight or high
temperature
• Exposed to corrosive or combustible
gases
• Exposed to a strong electromagnetic
fi eld or electrostatic charge
• Near induction heating systems
(such as high-frequency induction
heating systems and IH cooking
equipment)
• Susceptible to vibration
• Exposed to water, oil, chemicals, or
solvents
• Exposed to high humidity or
condensation
• Exposed to high quantities of dust
particles
EN-5
Safety Notes
WARNING
• Since there is a risk of electric shock,
check that the insulation on the test
lead and fl exible sensor (optional)
are neither ripped nor torn, and no
metal conductor inside the wire are
exposed before using the instrument.
If damaged, replace them with those
specifi ed by our company.
• To prevent a short circuit accident,
be sure to use the test leads with the
sleeves attached when performing
measurements in the CAT III
measurement category.
• If the sleeves are inadvertently
removed during measurement, stop
the measurement.
• With regard to the electricity supply,
there are risks of electric shock, heat
generation, fi re, and arc fl ash due to
short circuits. If persons unfamiliar
with electricity measuring instrument
are to use the instrument, another
person familiar with such instruments
must supervise operations.
• This instrument is measured on a
live line. To prevent electric shock,
use appropriate protective insulation
and adhere to applicable laws and
regulations.
• Handle and dispose of batteries in
accordance with local regulations.
EN-6
Safety Notes
CAUTION
Do not place foreign objects between the
jaw tips (or fl exible loop couplings) or insert
foreign objects into the gaps of the jaws
(or fl exible loop couplings). Doing so may
worsen the performances of the sensor or
interfere with clamping action.
Poor performance or damage from battery
leakage could result. Observe the cautions
listed below:
• Do not use batteries after their
recommended expiry date.
• Do not allow weak batteries to remain in
the instrument.
• Replace batteries only with the specifi ed
type.
• Remove the batteries from the instrument
if it is to be stored for a long time.
• The indicator lights up when the
remaining battery capacity is low. In this case,
the instrument's reliability is not guaranteed.
Replace the battery immediately.
• To avoid battery depletion, turn the rotary switch
OFF after use (the auto power save feature
consumes a small amount of current).
EN-7
Inspection Before Measurement
Inspection Before Measurement
• Verify that the instrument operates normally to
ensure that no damage occurred during storage
or shipping. If you fi nd any damage, contact your
authorized Hioki distributor or reseller.
• If damage is suspected, check the section below
before contacting your authorized Hioki distributor
or reseller.
Check that the test lead is not broken.
1
Replace with the specifi ed L9208 Test Lead.
Check that the resistance measurement and
2
continuity test operates normally.
Have the instrument repaired by the your
authorized Hioki distributor or reseller. The
instrument may have been subject to a voltage
of greater than 600 V during resistance
measurement or continuity testing.
Check that the battery voltage is not low.
3
Replace the batteries.
EN-8
Maintenance/Inspection
Maintenance/Inspection
Cleaning
• Measurements are degraded by dirt on the mating
surfaces of the jaw (or fl exible loop coupling), so
keep the surfaces clean by gently wiping with a
soft, dry cloth.
• To clean the device, wipe it gently with a soft cloth
moistened with water or mild detergent.
• Wipe the LCD display gently with a soft, dry cloth.
Insert/Replace Batteries
Necessary tool: Phillips screwdriver and CR2032 Coin-shaped
lithium battery
OK
12
NO
Do not turn the adjustment screw inside the
battery case. Doing so will cause the instrument to
report abnormal measured values.
CALIFORNIA, USA ONLY
This product contains a CR Coin Lithium Battery
which contains Perchlorate Material - special
handling may apply.
See www.dtsc.ca.gov/hazardouswaste/perchlorate
3
4
EN-9
Functions
Functions
Auto power-saving function
Display will automatically turn off if the instrument
is not used for 30 min.
To resume instrument operation in the previous state, select
the “OFF” position with the rotary switch and then move the
switch to the desired function.
To cancel auto power-saving function
Select the desired function with the rotary switch while
1.
holding down
The LCD display will change from [APS] to [OFF], and
2.
the auto power-saving function will be disabled.
Setting the rotary switch to “OFF” and then reselecting the
3.
desired function will enable the auto power-saving function.
Auto-range function
Automatically sets the measurement range to the
most appropriate range.
Displays [AUTO]
Manual-range function
To set the measurement range arbitrarily.
Select the desired function with the rotary switch while
1.
holding down
2.
Press key to switch the range.
(Can set the range as desired, except during continuity
testing.)
key.
key.
Overfl ow indication
Indication when input exceeds the measurement range.
Displays [OF] or [-OF]
EN-10
Parts Names
h
Example: 3280-10F
Jaw
Barrier
Operation grip
LCD Display
key
HOLD key
(Press to hold the
display value.)
Rotary switch
Measurement
terminal
Test lead or fl exible sensors plug
Parts Names
RearFront
Battery cover
Test leads
Sleeves
(Red)
(Black)
EN-11
Parts Names
AC Flexible Current Sensor (optional)
Flexible loop
Cap
(Approx. 7 mm)
Instruction
plate
EN-12
Cap
Specifi cations
Specifi cations
Accuracy
We defi ne measurement tolerances in terms of rdg. (reading)
and dgt. (digit) values, with the following meanings:
rdg.
(reading or
displayed value)
dgt.
(resolution)
General Specifi cations
The value currently being measured and
indicated on the measuring instrument.
The smallest displayable unit on a digital
measuring instrument, i.e., the input
value that causes the digital display to
show a “1” as the least-signifi cant digit.
Operating
environment
Operating temperature and humidity
Temperature −25°C to 65°C (−13.0°F to 149.0°F)
Humidity
(no
condensation)
Indoors, pollution degree 2, altitude up
to 2000 m (6562 ft.)
range: up to 40°C)
(40 M
Ω
Less than 40°C (104.0°F): 80% RH or less
At least 40°C (104.0°F) but less than 45°C
(113.0°F): 60% RH or less
At least 45°C (113.0°F) but less than 50°C
(122.0°F): 50% RH or less
At least 50°C (122.0°F) but less than 55°C
(131.0°F): 40% RH or less
At least 55°C (131.0°F) but less than 60°C
(140.0°F): 30% RH or less
At least 60°C (140.0°F) but less than 65°C
(149.0°F): 25% RH or less
EN-13
Specifi cations
Storage
temperature
and humidity
Dustproof and
waterproof
Drop-proof
distance
Standards Safety: EN61010
Power supply CR2032 Coin-shaped lithium battery ×1
Continuous
operating time
Dimensions
Mass • 3280-10F, 3280-20F: Approx. 100 g
Product
warranty period
Accessories • 9398 Carrying Case
−25°C to 65°C (−13°F to 149°F),
80% RH or less (no condensation)
IP40 (EN60529)
1 m on concrete
EMC: EN61326
(3 V DC)
Maximum rated power: 15 mVA
• 3280-10F: Approx. 120 hours
• 3280-20F: Approx. 70 hours
(AC current measurement mode,
continuous, unloaded)
• 3280-10F, 328
Approx. 57W×175H×16D mm
(2.24″W × 6.89″H × 0.63″D)
• CT6280: Approx. 42W×65H×18D mm
(1.65″W × 2.56″H × 0.71″D)
(excluding the fl exible loop and output
cable)
(3.5 oz.) (including battery)
• CT6280: Approx. 71 g (2.5 oz.)
3280-10F, 3280-20F, CT6280: 3 years
(C0205 Carrying Case when CT6280
is attached)
• L9208 Test lead
• CR2032 Coin-shaped lithium battery
• Instruction Manual
0-20F:
EN-14
Specifi cations
Options • CT6280 AC Flexible Current Sensor
(Attachment is included)
• 9209 Test Leads Holder
• L4933 Contact Pin Set
(Can be connected to the tip of
the L9208, which comes with the
instrument.)
• L4934 Small Alligator Clip Set
(Can be connected to the tip of
the L9208, which comes with the
instrument.)
Basic Specifi cations
Maximum input
current
Maximum input
voltage
Overload
protection
Maximum rated
voltage to earth
• Jaw (3280-10F, 3280-20F)
2000 A AC continuous (45 Hz to 66 Hz)
• Flexible loop
(3280-10F+CT6280 or 3280-20F+CT6280)
4200 A AC continuous (50 Hz to 60 Hz)
600 V AC/DC and 3×10
(ACV/DCV)
600 V AC/DC (ACV/DCV/
• Jaw, CT6280
600 V AC (Measurement category III),
300 V AC (Measurement category IV)
(Anticipated transient overvoltage:
6000 V)
• Voltage measurement terminal
600 V AC (Measurement category II),
300 V AC (Measurement category III)
(Anticipated transient overvoltage:
4000 V)
6
V·Hz or less
/continuity)
Ω
EN-15
Specifi cations
AC
measurement
method
Display update
rate
Noise rejection
characteristics
Crest factor
(3280-20F only)
Zero-display
range
Effects of
conductor
position
Maximum
measurable
conductor
diameter
• 3280-10F: Average value measurement
RMS method
• 3280-20F: True RMS measurement
method
400 ms±25 ms
NMRR DCV −40 dB or more
(50 Hz/60 Hz)
CMRR DCV −100 dB or more
(50 Hz/60 Hz,
1 k
ACV −60 dB or more
(50 Hz/60 Hz,
1 k
But, −45 dB or more
for 600 V range.
For 2500 counts or less, 2.5
Reduces linearly to 1.5 or less at 4200
counts
5 counts (AC Current, jaw - fl exible loop)
3280-10F, 3280-20F: within ±5.0%
CT6280: within ±5.0%
(At all positions around the sensor’s
centerpoint reference)
3280-10F, 3280-20F: 33 mm or less
CT6280: 130 mm or less
unbalance)
Ω
unbalance)
Ω
EN-16
Function Specifi cations
Display Maximum count: 4199 counts
Battery indicator
warning voltage
mark lights up at 2.3 V±0.15 V
or less
Accuracy Specifi cations
Specifi cations
Conditions of
guaranteed
accuracy
AC Current - Jaw (3280-10F)
1
Range Accuracy range
42.00 A 4.00 A to 41.99 A
1000 A 100 A to 1000 A
• Guaranteed accuracy period: 1 year
(Number of jaw and fl exible loop open/
close cycles: 10,000 or less)
• Guaranteed accuracy period after
adjustment made by Hioki: 1 year
• Temperature and humidity for
guaranteed accuracy: 23°C±5°C
(73.0°F±9.0°F), 80% RH or less
• Temperature characteristic:
Measurement accuracy × 0.1/°C is
added (excluding 23°C±5°C)
Accuracy
50 Hz ≤ f ≤ 60 Hz
±1.5% rdg. ±5 dgt.420.0 A 40.0 A to 419.9 A
EN-17
Specifi cations
AC Current - Jaw (3280-20F)
2
Range
42.00 A
420.0 A
1000 A
Accuracy is not defi ned for currents of 5×10
3
Range Accuracy range
420.0 A 40.0 A to 419.9 A
4200 A 400 A to 4199 A
Accuracy
range
4.00 A to
41.99 A
40.0 A to
419.9 A
100 A to
1000 A
AC Current - Flexible loop (3280-10F)
Accuracy
40 Hz ≤ f <
45 Hz
±2.0% rdg.
±5 dgt.
45 Hz ≤ f ≤
66 Hz
±1.5% rdg.
±5 dgt.
Accuracy
50 Hz ≤ f ≤ 60 Hz
±3.0% rdg. ±5 dgt.
(includes accuracy of CT6280
AC Flexible Current Sensor:
±1.0% rdg.)
66 Hz < f ≤
1 kHz
±2.0% rdg.
±5 dgt.
5
A·Hz or more.
EN-18
Specifi cations
AC Current - Flexible loop (3280-20F)
4
Accuracy
Range
range
40.0 A to
420.0 A
419.9 A
400 A to
4200 A
4199 A
*1: Includes accuracy of CT6280 AC Flexible Current Sensor:
±1.0% rdg.
*2: Accuracy is not defi ned for currents of 1000 A or more or
currents of 5×10
AC Voltage
5
Accuracy
Range
range
0.400 V to
4.200 V
4.199 V
4.00 V to
42.00 V
41.99 V
40.0 V to
420.0 V
419.9 V
400 V to
600 V
600 V
Accuracy
40 Hz ≤ f <
50 Hz
±3.5% rdg.
±5 dgt.*
5
A·Hz or more.
Accuracy
45 Hz ≤ f ≤
66 Hz
±1.8% rdg.
±7 dgt.
1, *2
50 Hz ≤ f ≤
60 Hz
±3.0% rdg.
1
±5 dgt.*
66 Hz < f ≤
500 Hz
±2.3% rdg.
±8 dgt.
60 Hz < f ≤
1 kHz
±3.5% rdg.
1, *2
±5 dgt.*
Input
impedance
±5%
11 M
Ω
±5%
10 M
Ω
±5%
10 M
Ω
±5%
10 M
Ω
EN-19
Specifi cations
DC Voltage
6
Range Accuracy range Accuracy
420.0 mV 40.0 mV to 419.9 mV
4.200 V 0.400 V to 4.199 V
42.00 V 4.00 V to 41.99 V 10 M
420.0 V 40.0 V to 419.9 V 10 M
600 V 400 V to 600 V 10 MΩ±5%
Resistance
7
Range Accuracy range Accuracy
420.0
4.200 k
42.00 kΩ4.00 kΩ to 41.99 k
420.0 kΩ40.0 kΩ to 419.9 k
4.200 MΩ0.400 MΩ to 4.199 M
42.00 M
8
Range Accuracy
420.0
40.0 Ω to 419.9
Ω
0.400 kΩ to 4.199 k
Ω
4.00 MΩ to 41.99 M
Ω
Continuity Check
±2.0% rdg.
Ω
±4 dgt.
Threshold of buzzer
sound
50
±2.5% rdg.
±5 dgt.
±1.0% rdg.
±3 dgt.
Ω
Ω
Ω
Ω
Ω
Ω
±40 Ω or less
Ω
±2.0% rdg.
±4 dgt.
±5.0% rdg.
±4 dgt.
±10.0% rdg.
±4 dgt.
Input
impedance
100 M
Ω
more
11 M
Ω
Ω
Ω
Open
circuit
voltage
3.4 V
or less
Open circuit
voltage
3.4 V or
less
or
±5%
±5%
±5%
EN-20
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