3286-20
Instruction Manual
CLAMPON
POWERHiTESTER
Apr. 2015 Revised edition 13
3286B981-13 15-04H
EN
Contents
Introduction i
Shipping Check
Safety
Note on Use
Organization of This Manual
vii
xiii
ii
iii
Chapter 1 Product Outline
1.1 Product Outline 1
1.2 Features
1.3 Parts and Functions
1.4 Flowchart of Key Operations
1.4.1 Current Measurements Mode 9
1.4.2 Harmonic Measurement
1.4.3 Change the Range
Chapter 2 Measurement Procedure 13
2.1 Preparations 13
2.2 Connections
2.3 Range Setup
2.4 Power Measurement
2.4.1 1φ P Meter, 1φ PF Meter
and 3φ PF Meter
2.4.2 Power and Power Factor
2.4.3 Phase Detection
2.4.4 Current (Frequency)
2.4.5 Voltage (Frequency)
2.5 Harmonic Measurement 30
2.5.1 Current Harmonics 30
2.5.2 Voltage Harmonics
2.6 Data Hold Function HOLD 33
3286B981-13
1
2
3
9
11
11
14
20
21
22
25
27
28
29
32
2.7 SLOW Mode 33
2.8 Recording Function REC
2.9 SETUP Function
2.10 Measurement Condition Save Function
2.11 Auto Power-Off Function APS
2.12 Battery Low Warning
37
2.13 Beep Tone
33
35
36
37
37
Chapter 3 Specifications 39
3.1 Measurement Specifications 39
3.1.1 AC Current Measurement Specifications 39
3.1.2 AC Voltage Measurement Specifications
3.1.3 Specifications of Single-phase Power
Measurement 1φ P Meter
3.1.4 Specifications of Power Factor
and Phase Angle Measurements
1φ PF Meter and 3φ PF Meter
3.1.5 Specifications of Balanced Three-phase
Power Measurements
3.1.6 Specifications of Frequency Measurement
3.1.7 Specifications of Harmonic Measurement
40
41
42
43
44
44
3.2 General Specifications 45
3.3 Operation Expressions
49
Chapter 4 Battery Replacement 53
Chapter 5 Attaching The Hand Strap
Chapter 6 Storage in Carrying Case
Chapter 7 Troubleshooting
Chapter 8 Service
55
57
59
61
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Introduction
Thank you for purchasing the HIOKI "3286-20
CLAMP ON POWER HiTESTER." To obtain
maximum performance from the instrument, please
read this manual first, and keep it handy for future
reference.
Importance
This instrument is the clamp on power meter which
keeps measurement function of the multiple
functions. If you set up a function mode in
advance, the mode will start up from the next use.
Have it set up for the preferable use. (Refer to "2.10
Measurement Condition Save Function)
Request
We have tried to bring this manual as close to
perfection as we could achieve. If perchance you
find any unclear portions, mistakes, omissions, or
the like, we would be most obliged if you could
please notify us of them via any HIOKI agent, or
directly.
i
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Introduction
ii
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Shipping Check
When you receive the instrument, inspect it
carefully to ensure that no damage occurred during
shipping. In particular, check the accessories, panel
switches, key, and connectors.
If damage is evident, or if it fails to operate
according to the specifications, contact your dealer
or HIOKI representative.
Check the 3286-20 Unit and the Supplied
Accessories
Main unit
3286-20 CLAMP ON POWER HiTESTER
Supplied accessories
9245 CARRYING CASE 1
L9635-01 VOLTAGE CORD 1
Hand Strap 1
Battery 1
Instruction manual 1
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Shipping Check
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iii
Safety
DANGER
This instrument is designed to comply with IEC
61010 Safety Standards, and has been
thoroughly tested for safety prior to shipment.
However, mishandling during use could result
in injury or death, as well as damage to the
instrument. Be certain that you understand the
instructions and precautions in the manual
before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
instrument defects.
The following symbols in this manual indicate the
relative importance of cautions and warnings.
Indicates that incorrect operation
DANGER
WARNING
CAUTION
NOTE
presents an extreme hazard that could
result in serious injury or death to the
user.
Indicates that incorrect operation
presents a significant hazard that could
result in serious injury or death to the
user.
Indicates that incorrect operation
presents a possibility of injury to the user
or damage to the instrument.
Indicates advisory items related to
performance or correct operation of the
instrument.
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Safety
iv
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Safety Symbols
This manual contains information and warnings
essential for safe operation of the instrument and for
maintaining it in safe operating condition. Before
using the instrument, be sure to carefully read the
following safety notes.
The symbol printed on the instrument
indicates that the user should refer to a
corresponding topic in the manual
(marked with the
using the relevant function.
In the manual, the symbol indicates
particularly important information that the
user should read before using the
instrument.
Indicates AC (Alternating Current).
Indicates DC (Direct Current).
Indicates a double-insulated device.
Indicates that the instrument may be connected
to or disconnected from a live circuit.
We define measurement tolerances in terms of rdg.
(reading) and dgt. (digit) values, with the following
meanings:
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
instrument, i.e., the input value that causes the
digital display to show a "1".
symbol) before
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Safety
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Symbols for various standards
This symbol indicates that the product
conforms to regulations set out by the
EC Directive.
Indicates the Waste Electrical and
Electronic Equipment Directive (WEEE
Directive) in EU member states.
Measurement categories
This instrument complies with CAT III safety
requirements.
To ensure safe operation of measurement
instruments, IEC 61010 establishes safety standards
for various electrical environments, categorized as
CAT II to CAT IV, and called measurement
categories. These are defined as follows.
CAT II: Primary electrical circuits in equipment
connected to an AC electrical outlet by a
power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring
electrical outlet receptacles.
CAT III: Primary electrical circuits of heavy
equipment (fixed installations) connected
directly to the distribution panel, and
feeders from the distribution panel to
outlets.
CAT IV: he circuit from the service drop to the
service entrance, and to the power meter
and primary overcurrent protection device
(distribution panel).
v
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Safety
vi
―――――――――――――――――――――――――――
Using a measurement instrument in an environment
designated with a higher-numbered category than
that for which the instrument is rated could result in
a severe accident, and must be carefully avoided.
Use of a measurement instrument that is not CATrated in CAT II to CAT IV measurement
applications could result in a severe accident, and
must be carefully avoided.
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Safety
―――――――――――――――――――――――――――
vii
Note on Use
Follow these precautions to ensure safe operation
and to obtain the full benefits of the various
functions.
Preliminary Checks
Before using the instrument the first time, verify
that it operates normally to ensure that the no
damage occurred during storage or shipping. If
you find any damage, contact your dealer or
Hioki representative.
Before using the instrument, make sure that the
insulation on the voltage cord is undamaged and
that no bare conductors are improperly exposed.
Using the product in such conditions could cause
an electric shock, so contact your dealer or Hioki
representative for replacements. (Model L9635-
01)
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Note on Use
viii
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DANGER
To avoid short circuits and potentially lifethreatening hazards, never attach the clamp
sensor to a circuit that operates at more than the
maximum rated voltage to earth.
Clamp sensor should only be connected to the
secondary side of a breaker, so the breaker can
prevent an accident if a short circuit occurs.
Connections should never be made to the primary
side of a breaker, because unrestricted current
flow could cause a serious accident if a short
circuit occurs.
Connect the voltage cords to the instrument first,
and then to the active lines to be measured.
Observe the following to avoid electric shock and
short circuits.:
Do not allow the voltage cord clips to touch two
wires at the same time.
Never touch the edge of the metal clips.
When the clamp sensor is opened, do not allow
the metal part of the clamp to touch any exposed
metal, or to short between two lines.
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Note on Use
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ix
WARNING
Do not allow the instrument to get wet, and do not
take measurements with wet hands. This may cause
an electric shock.
To avoid electric shock when measuring live lines,
wear appropriate protective gear, such as insulated
rubber gloves, boots and a safety helmet.
To avoid electric shock when replacing the battery,
first disconnect the voltage cord or clamp from the
object to be measured. After replacing the battery,
replace the cover and screws before using the
instrum ent .
When replacing the battery, be sure to insert them
with the correct polarity. Otherwise, poor
performance or damage from battery leakage could
result. Replace battery only with the specified type.
Battery may explode if mistreated. Do not shortcircuit, recharge, disassemble or dispose of in fire.
Handle and dispose of batteries in accordance with
local regulations.
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Note on Use
x
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CAUTION
Avoid stepping on or pinching the cable, which
could damage the cable insulation.
Keep the cables well away from heat sources, as
bare conductors could be exposed if the insulation
melts.
To prevent an electric shock accident, confirm that
the white or red portion (insulation layer) inside the
cable is not exposed. If a color inside the cable is
exposed, do not use the cable.
Do not exceed the maximum input current rating,
which depends on the frequency of the current
being measured. Be careful about the evolution of
heat, when the input frequency is high.
1200
1200
1000
1000
800
800
600
600
400
400
200
200
Maximum input current (Ar ms)
0
0
10 100 1000 10000 100000
10 100 1k 10k 100k
Frequency [Hz]
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Note on Use
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xi
CAUTION
If the protective functions of the instrument are
damaged, either remove it from service or mark it
clearly so that others do not use it inadvertently.
Do not store or use the instrument where it could
be exposed to direct sunlight, high temperature or
humidity, or condensation. Under such conditions,
the instrument may be damaged and insulation
may deteriorate so that it no longer meets
specifications.
Keep the clamp jaws and core slits free from
foreign objects, which could interfere with clamping
action.
To avoid damage to the instrument, protect it from
physical shock when transporting and handling. Be
especially careful to avoid physical shock from
dropping. Do not exert excessive pressure on the
clamp sensor or attempt to wedge the sensor into a
tight spot for measurement.
This instrument is designed for use indoors. It can
be operated at temperatures between 0 and 40
without degrading safety.
This instrument is not designed to be entirely
water- or dust-proof. Do not use it in an especially
dusty environment, nor where it might be splashed
with liquid. This may cause damage.
Calibration and repair of this instrument should be
performed only under the supervision of qualified
technicians knowledgeable about the dangers
involved.
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Note on Use
xii
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NOTE
The indicator appears when battery voltage
becomes low. During which time accuracy cannot
be guaranteed. Replace batteries only with the
specified type.
When replacing the battery, make sure that the
metal battery snap fitting is firmly connected. If the
metal fitting is loose, adjust it and recheck the
connection.
To avoid corrosion from battery leakage, remove the
batteries from the instrument if it is to be stored for
a long time.
Correct measurement may be impossible in the
presence of strong magnetic fields, such as near
transformers and high-current conductors, or in the
presence of strong electromagnetic fields such as
near radio transmitters.
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Note on Use
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xiii
Organization of This Manual
Chapter 1
Product Outline
Explains the parts and functions of the instrument.
Chapter 2
Measurement Procedure
Explains how to use the 3286-20 for measurement.
Chapter 3
Specifications
Lists the specifications of the 3286-20 CLAMP ON
AC/DC HiTESTER.
Chapter 4
Battery Replacement
Explains how to replace the battery used to power
the 3286-20.
Chapter 5
Attaching the Hand Strap
Explains how to attach the hand strap, for easy
handling of the instrument in the field.
Chapter 6
Storage in Carrying Case
Explains how to store the instruments in the
carrying case.
Chapter 7
Troubleshooting
Describes how to check before requesting service.
Chapter 8
Service
Explains how to get the instrument serviced.
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Organization of This Manual
xiv
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Organization of This Manual
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Chapter 1
Product Outline
1.1 Product Outline
The "3286-20 CLAMP ON POWER HiTESTER" is
designed to provide multiple functions by adopting
a single-chip microcomputer. At any desired point
of a single-phase circuit or three-phase circuit, this
instrument enables the measurement of voltage,
current, power, power factor, phase angle, reactive
power or frequency, and the detection of phase
sequence on live lines.
1
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Chapter 1 Product Outline
2
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1.2 Features
A multi-function microcomputer
The built-in microcomputer offers various functions
in a compact form.
Display of true rms values
The true rms value conversion circuit allows
accurate measurement of currents with distorted
waveforms.
Enables power measurement
When both current and voltage are input
simultaneously, the power factor, phase angle,
reactive factor, as well as power can be measured,
and phase detected.
Enables harmonic measurement
Higher harmonics of current and voltage up to the
20th order can be measured. Moreover, overall
harmonic distortion factors and content can be
displayed.
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Chapter 1 Product Outline
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1.3 Parts and Functions
Top and Side View
10
12
3
15
1
2
11
16
3
4
5
6
9
8
7
17
13
14
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Chapter 1 Product Outline
4
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POWER
1.
Used to turn power on/off
2.
Watt
key
Used to select the display of active power, apparent
power, or power factor for the 1φ P meter.
Used to select the display of power factor, phase
difference, or reactive factor for the 1φ PF meter.
Used to select the display of active power, apparent
power, power factor, phase difference, or reactive
factor for the 3φ PF meter.
3.
RANGE
key
Displays the current and voltage ranges, and enables
the setting of these ranges. (The
U/
and
I/
keys are used to set these ranges.)
4.
HOLD
key
Holds the indicated value.
Used for the measurement condition save function.
HOLD
Holding down the
keywhenpoweringoff:
The measurement conditions are saved to the
internal memory when powering off. The
measurement conditions are automatically restored
when powering on.
Holding down the
HOLD
keywhenpoweringon:
Measurement conditions are reset to the initial
values.
5.
LINE/HARM
key
Cycles through single-phase power measurement,
three-phase power measurement, current harmonic
measurement, and voltage harmonic measurement.
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Chapter 1 Product Outline
―――――――――――――――――――――――――――
U/
6.
(RANGE) key
Selects voltage display mode. Pressing this key in
voltage display mode resets the peak-hold value.
Switches MAX/MIN display of effective value and
peak value during REC.
Enables the setting of a voltage range in range setup
mode.
Lowers the order in harmonic display mode.
7.
I/
(RANGE) key
Selects current display mode. Pressing this key in
current display mode resets the peak-hold value.
Switches MAX/MIN display of effective value and
peak value during REC.
Enables the setting of a current range in range setup
mode.
Raises the order in harmonic display mode.
8.
MAX/MIN
(SET2) key
Switches the REC function on and off.
9.
MODE
(SET1) key
Pressing this key in power display mode switches
between current/voltage display and reactive power
display.
Pressing this key during harmonic measurement
switches between overall harmonic distortion factor
display (THD-R, THD-F) and harmonic content
display.
Pressing this key during REC lets you to check the
elapsed time and remaining battery capacity.
Used to start SETUP. (The instrument is powered
on with the
SET1
key held down.)
5
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Chapter 1 Product Outline
6
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10. Clamp s ensor
To measure current, open the top ends of the clamp
sensor by gripping the lever 11. Then position the
conductor to be measured at the center of the clamp
sensor and firmly close the clamp sensor.
11. Lever
Used to open and close the clamp sensor.
12. Current direction mark
When measuring power, clamp the conductor with
the arrow facing the load side.
13. Data Output terminal
*
Connected to the optional 9636 RS-232C CABLE to
provide output.
14. Voltage measurement terminal
Connected to the L9635-01 VOLTAGE CORD (red
and black, supplied with the instrument) to measure
voltage and harmonic.
15. Back case
To replace the battery, remove the two screws.
16. Hand strap
Attach to get a better grip on the instrument.
The Data Output function is only available for customers
*:
who have the Model 9636 RS-232C Cable, Model 9636-01
RS-232C Package.
Model 9636 and 9636-01 will be discontinued effective
January 25, 2012
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Chapter 1 Product Outline
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17. Display (LCD)
Display 1
Display 2 Display 3
Alternating Current (AC)
cosφ Power factor
sinφ Reactive factor
HOLD
Data hold function
DATA
*
Data output
RST Three-Phase
Reverse phase
Normal phase
Missing phase
APS
Auto power off function
S Slow
REC Record function
LEAD Lead phase
LAG Lag phase
Battery low warning
Phase angle (deg.)
A Current
PEAK Wave peak value
7
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Chapter 1 Product Outline
8
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W Active power
VA Apparent power
V Voltage
MAX Maximum value
MIN Minimum value
% Harmonic percentage
%THD Total harmonic distortion ratio
Hz Frequency
var (reactive power)
Total harmonic distortion ratio-F
(A distortion rate against the basic wave.)
Total harmonic distortion ratio-R
(A distortion rate toward the actual
effective value.)
The Data Output function is only available for customers
*:
who have the Model 9636 RS-232C Cable, Model 9636-01
RS-232C Package.
Model 9636 and 9636-01 will be discontinued effective
January 25, 2012
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Chapter 1 Product Outline
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