Hioki CM3289 User Manual

CM3289

AC CLAMP METER

Instruction Manual

EN

Mar. 2018 Edition 1
CM3289A961-00 18-03H

Warranty

Warranty malfunctions occurring under conditions of normal use in
conformity with the Instruction Manual and Product Precautionary
Markings will be repaired free of charge. This warranty is valid for a
period of three (3) years from the date of purchase. Please contact
the distributor from which you purchased the product for further
information on warranty provisions.

Introduction

Thank you for purchasing the Hioki CM3289 AC Clamp Meter. This
instrument is a clamp meter that can be perform true RMS measure­ment of current simply by clamping it around a circuit. To obtain

maximum performance from the instrument, please read this manual
rst, and keep it handy for future reference.

Target audience

This manual has been written for use by individuals who use
the product in question or who teach others to do so. It is as­sumed that the reader possesses basic electrical knowledge
(equivalent to that of someone who graduated from the electri­cal program at a technical high school).

Be sure to also read the separate document
Precautions

” before use.

Safety Notes

Symbols afxed to the device

The instrument can be connected to or disconnected from a live
conductor

The exible sensor can be connected to or disconnected from

live conductors when appropriate protective insulation is used.
The clamp meter and test leads can only be connected to or
disconnected from insulated conductors suited to the voltage
of the conductor under measurement.

“Operating

DANGER

To avoid electric shock, do not touch the portion
beyond the protective barrier during use.

Do not subject the instrument to any voltages when
the resistance measurement or continuity check
function is selected. Doing so may damage the in­strument and result in bodily injury. To avoid electri­cal accidents, turn off the circuit before measuring it.

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 satis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 accor-

dance with its dened measurement category and rated

voltage.

• 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.
(For the measurement categories, see “Measurement
categories” (Operating Precautions).)

• If the sleeves are removed during measurement, stop
the measurement.

• Handle and dispose of batteries in accordance with
local regulations.

CAUTION

Do not place foreign objects between the jaw tips (or

exible loop couplings) or insert foreign objects into the
gaps of the jaws (or exible loop couplings). Doing so

may worsen the performances of the sensor or interfere
with clamping action.

• The indicator is displayed when the remaining
battery capacity is low. In this case, the accuracy of
the instrument is not guaranteed. Replace the battery
immediately.

• To avoid battery depletion, set the rotary switch in the

[OFF] position after use. (Even when the automatic

power-saving function is enabled, the instrument con­sumes a small amount of the battery power.)

Inspection Before Measurement

• Before using the instrument, check it and verify that it operates
properly to make sure that it suffered no damage during storage or
transportation.

• If damage is suspected, check the section below before contacting

your authorized Hioki distributor or reseller.

(1) Check the test lead for breaks.

If any, replace it with the new L9208 Test Lead.

(2) Check that the resistance measurement and continuity

check operates normally.

If any one of them does not operate normally, send the
instrument for repair to

or reseller. The instrument may have been subject to a voltage
of greater than 600 V during resistance measurement or conti­nuity check.

(3) Check that the battery weakens.

the your authorized Hioki distributor

If it weakens, replace the battery.

Functions

Automatic power-saving function

The instrument automatically turns off the LCD display after it is not
operated for 30 minutes.

To restore the instrument from a non-displaying state

Set the rotary switch in the [OFF] position and then another one.

To cancel automatic power-saving function

• Set the rotary switch in a position other than [OFF] while hold­ing down the HOLD key.

• The text [APS] and [OFF] are displayed in turn on the LCD
display, and the automatic power-saving function is disabled.

To enable the automatic power-saving function, set the rotary
switch in the [OFF] position, and then another one.

Auto-range function

The instrument automatically selects the most appropriate measure­ment range.

The text [AUTO] is displayed on the LCD display.

To set the measurement range manually (Manual-range function)

Set the rotary switch in the [OFF] position and then set the rotary

1.

switch in a position other than [OFF] while holding down the

key.

2.

Press the

(Any ranges can be set except for the continuity check.)

Overow indication

If an input exceeds the measurement range, the text [OF] or [-OF]

is displayed on the LCD display.

LCD Display With All Segments Turned On

The segment [FILTER] is not used.

key to switch the measurement range.

The instrument screen displays the alphanumeric characters
as follows.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1 2 3 4 5 6 7 8 9 0

Parts Names

AC Clamp Meter

Jaw

Front

Barrier

LCD Display

key

HOLD key

(Press to hold the
displayed value.)

Rotary
switch

Measurement

terminal

Plug of test lead or ex­ible sensor

Test Lead AC Flexible Current Sensor

*Optional

Sleeves

Cap
(Approx. φ7 mm)

(Red)(Black)

Instruction

plate

Rear

Operating grip

Battery cover

Test Leads Holder

Replaceable with battery
cover

*

Flexible loop

Cap

Using the at­tachment allows
the flexible
loop to weave
through cables
easily.

Attachment

Cap

Measuring Methods

NO

OK

NO

NO

NO

NO

NO

OK

NO

NO

NO

AC Current Measurement [ ]

Measuring current with the instrument

1 2

OK

NO

Measuring current with Model CT6280 AC Flexible
Current Sensor (optional)

Use protective gear

1 2 3 4

5

Cannot measure
current

OK

NO

1 wire

NO

Do not pull the exible loop
with excessive force.

Voltage Measurement

AC Voltage Measurement [

To avoid damage, . . .

Do not bend the

exible loop.

Wire binding band

Do not pack the exible

loop with it bent.

]

1 2 3 4

DC Voltage Measurement [

1 2 3 4

]

OK

Black

NO

Red

Black

3

Red

Resistance Measurement [ ]

21 3 4

5

Continuity Check [ ]

21 3

4

5

Cleaning / Replacing Battery

Cleaning

•

Measurements are degraded by dirt on the mating surfaces of the
jaw (or exible loop coupling), so keep the surfaces clean by gently
wiping with a soft, dry cloth.

• To clean the instrument, wipe it gently with a soft cloth moistened
with water or mild detergent.

• Wipe the LCD display gently with a soft, dry cloth.

Replacing Battery

Necessary items: Phillips screwdriver (No.1) and Coin cell lithium
battery (CR2032)

1

NO

2

CR2032

Do not loosen any screws

OK

Do not turn any one of the three screws inside the battery case.
Doing so will cause the instrument to report abnormal measured
values.

but the one securing the
cover.

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

Specifications

General Specifications

Operating
environment

Indoors, pollution degree 2,
altitude up to 2000 m (6562 ft.)

43

Operating temperature and humidity

Temperature

Humidity
(no condensa­tion)

Storage tem­perature and
humidity
Drop-proof

Standards Safety: EN61010

Power supply Coin cell lithium battery CR2032 ×1 (3 V DC)

Continuous
operating time

Dimensions

Dimensions
(Jaw)
Mass • CM3289: Approx. 100 g (3.5 oz.)

Product warranty
period
Accessories • 9398 Carrying Case

Options • CT6280 AC Flexible Current Sensor

−25°C to 65°C (−13.0°F to 149.0°F)
(For the 40 M
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

−25°C to 65°C (−13°F to 149°F),
80% RH or less (no condensation)

Operate after a drop from1 m on concrete

EMC: EN61326

Rated power voltage: 3 V DC

Maximum rated power: 15 mVA
Approx. 70 hours

(AC current measurement mode, continuous, unloaded)

• CM3289: Approx. 57W×181H×16D mm

(2.24″W × 7.13″H × 0.63″D)

• CT6280: Approx. 42W×65H×18D mm

(1.65″W × 2.56″H × 0.71″D)
(excluding the exible loop and output cable)

Approx. 50W×11D mm (1.97

(including battery)

• CT6280: Approx. 71 g (2.5 oz.)

CM3289, CT6280: 3 years

• L9208 Test lead

• Coin cell lithium battery CR2032 (Installed in Model
CM3289, for LCD display)

• Instruction Manual

• Operating Precautions (0990A909)

(Attachment and C0205 are 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.)

• C0205 Carrying Case (Models CT6280, L9208, and
CM3289 can be stored.)

Ω

range: up to 40°C)

″W × 0.43″D

)

Basic Specifications

Maximum input
current

Maximum input
voltage
Overload
protection
Maximum rated voltage to earth

Jaw, CT6280

Voltage
measurement
terminal

AC measure­ment method
Display update
rate
Noise rejection
characteristics

Crest factor

• Jaw (CM3289):2000 A AC, continuous (45 Hz to 66 Hz)

• Flexible loop (CM3289+CT6280):
4200 A AC, continuous (50 Hz to 60 Hz)

600 V AC/DC and 3×106 V·Hz or less (ACV, DCV)

Ω

600 V AC/DC (ACV, DCV,

600 V AC (Measurement category III),
300 V AC (Measurement category IV)
(Anticipated transient overvoltage: 6000 V)

600 V AC (Measurement category II),
300 V AC (Measurement category III)

(Anticipated transient overvoltage: 4000 V)

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 kΩ unbalance)

For 2500 counts or less, 2.5

Reduces linearly to 1.5 or less at 4200 counts

But, −45 dB or more for 600 V range.

, continuity)

Ω

unbalance)

Zero-display
range
Effects of con­ductor position

Maximum mea­surable conduc­tor diameter
Model CT6280

5 counts (AC current measured with jaw or exible loop)

• CM3289: within ±5.0% (Specied with a 11-mm-
diameter cable)

• CT6280: within ±5.0%

(At any positions, based on the center of sensor)

• CM3289: φ33 mm or less

• CT6280: φ130 mm or less

Approx.

Cross-section diameter of sensor cable:
Sensor-tip cap diameter:
Output cable length:

Approx.

Approx.

φ7.0 mm

800 mm

φ5.0 mm

Accuracy Specifications

rdg. (reading or displayed value):The value currently being measured and

indicated on the measuring instrument.

dgt. (resolution):The smallest displayable unit on a digital measuring instru-

ment, i.e., the input value that causes the digital display to show a “1” as

the least-signicant digit.

Conditions of guaranteed accuracy

• Guaranteed accuracy period: 1 year (Number of jaw and 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)

AC Current Measured With Jaw

Range Accuracy range

42.00 A 4.00 A to 41.99 A

420.0 A 40.0 A to 419.9 A

1000 A 100 A to 1000 A

Accuracy is not dened for currents of 3×10

AC Current Measured With Flexible loop

Range Accuracy range

420.0 A 40.0 A to 419.9 A
4200 A 400 A to 4199 A
*1: Includes accuracy of CT6280 AC Flexible Current Sensor, ±1.0% rdg.
*2: Accuracy is not dened for a current of 1000 A or more or that of 3×105

A·Hz or more.

AC Voltage

Range Accuracy range

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 M

DC Voltage

Range Accuracy range Accuracy Input impedance

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 M

Resistance

Range Accuracy range Accuracy

Ω

420.0

4.200 k

42.00 k

420.0 k

4.200 MΩ0.400 MΩ to 4.199 MΩ±5.0% rdg.±4 dgt.

42.00 M

Continuity Check

Range Accuracy

420.0

40.0 Ω to 419.9

Ω

0.400 kΩ to 4.199 k

Ω

4.00 kΩ to 41.99 k

Ω

40.0 kΩ to 419.9 k

Ω

4.00 MΩ to 41.99 M

Ω

±2.0% rdg.±4 dgt. 50 Ω±40 Ω or less 3.4 V or less

Accuracy

40 Hz ≤ f <
45 Hz

±2.0% rdg.
±5 dgt.

Accuracy

40 Hz ≤ f <

50 Hz

±3.5% rdg.
±5 dgt.*

Accuracy

45 Hz ≤ f ≤

66 Hz

±1.8% rdg.
±7 dgt.

Ω

Ω
Ω
Ω

Ω

45 Hz ≤ f ≤

66 Hz

±1.5% rdg.
±5 dgt.

5

A·Hz or more.

50 Hz ≤ f ≤

60 Hz
±3.0% rdg.

1, *2

±2.5% rdg.
±5 dgt.

±1.0% rdg.
±3 dgt.

±2.0% rdg.±4 dgt.

±10.0% rdg.±4 dgt.

Threshold for
buzzer sound

1

±5 dgt.*

66 Hz < f ≤ 500

Hz

±2.3% rdg.
±8 dgt.

100 M

11 M

66 Hz < f ≤ 1

kHz

±2.0% rdg.
±5 dgt.

60 Hz < f ≤ 1

kHz

±3.5% rdg.
±5 dgt.*

Input
impedance

Ω

11 M

Ω
Ω
Ω

Ω

or more

Ω

±5%

Ω

±5%

Ω

±5%

Ω

±5%

Open-circuit
voltage

3.4 V or

less

Open-circuit
voltage

1, *2

±5%

±5%
±5%
±5%

Function Specifications

Display Maximum count: 4199 counts
Battery indicator

warning voltage

The mark

V±0.15 V or less.

is displayed at a battery voltage of 2.3