HIOKI 3285-20 Clamp-on AC/DC HiTester Instruction Manual

Instruction Manual

3285-20

CLAMP ON AC/DC HiTESTER

April 2011 Revised edition 7 3285B981-07 11-04H

Contents

Introduction

Verifying Package Contents

Safety Information

Operating Precautions

Preliminary Check

Chapter 1 Overview

1.1 Product Overview

1.2 Features

1.3 Names and Functions of Parts

1.4 Flowchart of button Operations

1.4.1 Current Measurements Mode

1.4.2 Voltage Measurements Mode

1.4.3 Frequency Measurements Mode

1.4.4 Resistance Measurements Mode

1.5 Modes

Chapter 2 Measurement 15

2.1 Preparations 15

2.1.1 Installing or Replacing the Battery

2.1.2 Attaching the Hand Strap

2.1.3 Turning the Power On and Off

15

16

16

2.1.4 Battery Low Warning (When mark lights) 17

2.1.5 Pre-Operation Inspection 18

iii viii ii i xiv

10

10

11

12

12

13

2

3

1

1

2.2 Current Measurement

2.2.1 Measuring DC Current (DC A)

2.2.2 Measuring AC Current (AC A)

2.2.3 Measuring AC/DC Current (AC+DC A)

2.2.4 Peak Hold Measurement

2.3 Voltage Measurement

2.3.1 Measuring DC Voltage (DC V)

2.3.2 Measuring AC Voltage (AC V)

2.3.3 Measuring AC/DC Voltage (AC+DC V)

2.3.4 Peak Hold Measurement

2.4 Frequency Measurement 31

2.4.1 Frequency Measurement in Current Mode 31

26

27

28

29

19

19

20

22

24

26

2.4.2 Frequency Measurement in Voltage Mode 32

2.5 Resistance Measurement 34

2.6 Continuity Check 36

39

39

39

40

Chapter 3 Useful Functions

3.1 Adjusting and Correcting Values

3.1.1 Auto-Zero-Adjustment Function

3.1.2 Zero-Cancel Correction Function

3.2 Pausing and Reading the Display

(Data Hold Function HOLD

)

3.3 Alteration of Counter Updates

3.3.1 SLOW mode

3.3.2 FAST mode

3.4 Storing Values in Memory

(Recording Function REC)

3.5 Automatically Turning Power Off

(Auto Power-Off Function APS

)

3.6 Beep Tone

43

47

48

41

42

42

42

Chapter 4 Specifications

4.1 Measurement Specifications

49

49

4.1.1 Current Measurement Specifications

4.1.2 Voltage Measurement Specifications

49

52

4.1.3 Resistance Measurement Specifications 54

4.1.4 Continuity Check 54

4.2 General Specifications 55

Chapter 5 Maintenanceand Service

5.1 Cleaning

5.2

After service

5.3 Troubleshooting

5.4 Error Massage

59

59

59

60

64

Introduction

Thank you for purchasing the HIOKI "3285-20

Clamp-on AC/DC HiTester."

To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future reference.

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.

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Introduction

Verifying Package Contents

When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. In particular, check the accessories, panel switches, and connectors.

If damage is evident, or if it fails to operate according to the specifications, contact your dealer or Hioki representative.

Main unit

3285-20 Clamp-on AC/DC HiTester

Supplied accessories

9345 Carrying Case 1

L9207-10 Test Lead (red and black) 1

Hand Strap 1

Battery 6F22(006P) 1

Instruction manual 1

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Verifying Package Contents

Safety Information

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.

This manual contains information and warnings essential for safe operation of the instrument and for maintaining it in safe operating condition. Before using it, be sure to carefully read the following safety precautions.

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Safety Information

Safety Symbols

The symbol printed on the instrument indicates that the user should refer to a corresponding topic in the manual (marked with the symbol) before using the relevant function.

In the manual, the symbol indicates particularly important information that the user should read before using the instrument.

Indicates both DC (Direct Current) and AC

(Alternating Current).

Indicates DC (Direct Current).

Indicates a double-insulated device.

Indicates a grounding terminal.

Indicates that the instrument may be connected to or disconnected from a live circuit.

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The following symbols in this manual indicate the relative importance of cautions and warnings.

DANGER

WARNING

CAUTION

NOTE

Indicates that incorrect operation presents extreme danger of accident resulting in death or serious injury 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.

Accuracy

We define measurement tolerances in terms of f.s.

(full scale), rdg. (reading) and dgt. (digit) values, with the following meanings: f.s. (maximum display value or scale length)

The maximum displayable value or scale length.

This is usually the name of the currently selected range.

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" as the least-significant digit.Accuracy

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Measurement categories (Overvoltage 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 I to CAT IV, and called measurement categories. These are defined as follows.

CAT I

Secondary electrical circuits connected to an AC electrical outlet through a transformer or similar device.

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 The circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device

(distribution panel).

Higher-numbered categories correspond to electrical environments with greater momentary energy. So a measurement device designed for CAT III environments can endure greater momentary energy than a device designed for CAT II.

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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.

Never use a CAT I measuring instrument in CAT II,

III, or IV environments.

The measurement categories comply with the

Overvoltage Categories of the IEC60664 Standards.

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Operating Precautions

Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions.

DANGER

To avoid short circuits and potentially lifethreatening hazards, never attach the clamp to a circuit that operates at more than 600 Vrms.

The maximum rated voltage to earth is 600

Vrms. Attempting to measure voltage in excess of the maximum rated voltage to earth could destroy the instrument and result in personal injury or death.

This instrument 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.

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

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Operating Precautions

DANGER

Never apply voltage to the test leads when the

Resistance measurement, Continuity Check modes are selected. Doing so may damage the instrument and result in personal injury.

To avoid electrical accidents, remove power from the circuit before measuring.

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.

During current measurement, to avoid an electric shock accident, do not connect the test leads or temperature probe to the instrument.

Input voltage exceeding 600 Vrms (1000 V max.) with respect to ground could damage the instrument and result in personal injury.

Be sure to insert them with the correct polarity.

Otherwise, poor performance or damage from battery leakage could result.

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WARNING

To avoid electric shock when replacing the battery, first disconnect the clamp from the object to be measured.

After replacing the battery, replace the cover and screws before using the instrument.

To avoid the possibility of explosion, do not short circuit, disassemble or incinerate batteries.

Handle and dispose of batteries in accordance with local regulations.

Do not use the instrument where it may be exposed to corrosive or combustible gases.

The instrument may be damaged or cause an explosion.

CAUTION

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.

This instrument is designed for use indoors. It can be operated at temperatures between 0 and 40 without degrading safety.

Keep the clamp jaws and core slits free from foreign objects, which could interfere with clamping action.

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CAUTION

For safety reasons, when taking measurements, only use the Model L9207-10 Test Lead provided with the instrument.

To avoid damage to the instrument, do not exceed the maximum input current rating, which depends on the frequency of the current being measured

(see Fig.3 of 4.1.1) Be careful about the evolution of heat, when the input frequency is high.

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.

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. If it isn't connected securely, the power may not be turned on, and a power may be turned off during the use.

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.

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CAUTION

The protection rating for the enclosure of this device (based on EN60529) is *IP40.

*IP40:

This indicates the degree of protection provided by the enclosure of the device against use in hazardous locations, entry of solid foreign objects, and the ingress of water.

4: Protected against access to hazardous parts with wire measuring 1.0 mm in diameter. The equipment inside the enclosure is protected against entry by solid foreign objects larger than

1.0 mm in diameter.

0: The equipment inside the enclosure is not protected against the harmful effects of water.

Removable sleeves are attached to the metal pins at the ends of the test leads.

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. In a CATI or CATII environment, if the tips of the test leads do not reach the measurement object, remove the rigid insulating sleeve before measuring.

For details on measurement categories, see

“Measurement categories”(page vi) in the instruction manual.

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CAUTION

When performing measurements with the sleeves attached, be careful to avoid damaging the sleeves. If the sleeves are inadvertently removed during measurement, be especially careful in handling the test leads to avoid electric shock.

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.

NOTE

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.

To avoid corrosion from battery leakage, remove the batteries from the instrument if it is to be stored for a long time.

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Preliminary Check

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.

WARNING

Before using the instrument, make sure that the insulation on the test leads is undamaged and that no bare conductors are improperly exposed.

Using the instrument in such conditions could cause an electric shock, so contact your dealer or

Hioki representative for replacements. (Model

L9207-10 Test Lead).

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Preliminary Check

Chapter 1

Overview

1.1 Product Overview

The 3285-20 Clamp-on AC/DC HiTester makes it possible to measure DC, AC or AC+DC current in live power lines without tapping into or connecting the lines.

And it is also possible to measure voltage, frequency and resistance, and check circuit continuity.

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1.1 Product Overview

1.2 Features

Large current measurement

Allows measurement of large current up to 2000 A.

Display of true rms values

The true rms value conversion circuit allows accurate measurement of currents with distorted waveforms.

Measurement for AC/DC

The instrument permits measurement of AC superimposed on DC, as well as measurement of half- and full-wave rectification.

Peak measurement

Allows measurement of peak hold values for either voltage or current. Transitional peak values can also be measured.

REC function

Displays the maximum and minimum measured values.

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1.2 Features

1.3 Names and Functions of Parts

3285-20

10

15

16

11

12

5

6

9

8

7

13

3

4

1

2

14

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1.3 Names and Functions of Parts

1

POWER

Used to turn power on/off

To disable the auto power-off function, hold

HOLD

and press

POWER

, when you turn power on.

2 button

Switches current modes as follow.

DCA ACA AC+DCA

3

RANGE

button

Switches between auto and manual ranges in measurements of current, voltage, or frequency.

Switches manual ranges.

Displays a cursor on the bar graph to show the selected range.

The current ranges are 200 A and 2000 A. The voltage ranges are 30 V, 300 V and 600 V. The frequency ranges are 10 Hz, 100 Hz and 1000 Hz.

Auto-ranging is used for resistance measurement.

4

HOLD

button

Used to suspend or inactivate the screen-updating function.

To disable the auto power-off function when powering on, hold

HOLD

button and press

POWER

button.

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5

Ω / button

Switches between resistance measurement and continuity checking.

Ω

6

SLOW/PEAK/Hz

button

SLOW slows down screen updating speed (once per three seconds).

FAST speeds up screen updating speed (four times per second). There isn't an annunciator "

FAST

".

Instead, the unit symbol blinks.

PEAK measures peak values (Peak Hold).

Hz measures frequency (in AC or AC+DC mode).

7 button

Switches voltage modes as follows.

DCV ACV AC+DCV

8

MAX/MIN

button

Displays the maximum value (MAX), the minimum value (MIN), or the average value (AVE) of the maximum and minimum values for the recording

(REC) function.

MAX displays the maximum measured value after the REC function is activated.

MIN displays the minimum measured value after the

REC function is activated.

AVE displays the average value of the maximum and minimum measured values after the REC function is activated.

The auto power-off function is disabled.

Not available during resistance measurement.

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9

0ADJ/RESET

Performs auto-zero-adjustment in DC A, AC+DC A and DC V modes.

Resets data when measuring peak values. Reset all the data in a REC function.

If zero is not indicated under no input in the AC A,

AC+DC A, AC V or AC+DC V modes, press

HOLD

, then press

0ADJ/RESET

to perform a zerocancel correction.

10 Clamp sensor

To measure current, open the top ends of the clamp sensor by gripping the lever 12. Then position the conductor to be measured at the center of the clamp sensor and firmly close the clamp sensor.

11 Protective barrier

Be careful to not touch the clamp sensor beyond the safety barrier when clamping onto a conductor for measurement.

12 Lever

Used to open and close the clamp sensor.

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13 Display (LCD)

ADJ

Direct Current (DC)

Alternating Current (AC)

Alternating Current and Direct

Current (AC+DC)

Auto-zero-adjustment or zerocancel correction function is active

Battery low warning

HOLD

Data hold function

APS

Auto power off function

AUTO

Auto-range

SLOW

Counter update once every 3 seconds

REC

MAX

MIN

Record function

Maximum value

Minimum value

AVE

Average value = (MAX + MIN) /

2

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Ω

Resistance

Continuity

Hz

Frequency

V

Voltage

PEAK

Wave peak value

True root mean square value

RMS

A hour min

Current

1 hour/segment (bar graph)

1 minute/segment (bar graph)

Input over (bar graph)

14 Voltage/resistance input terminal (V,

Ω, and

COM terminals)

Connected to the L9207-10 Test Lead (red and black, supplied with the instrument) to measure voltage or resistance.

15 Back case

To replace the battery, remove the two screws.

16 Hand strap

Attach to get a better grip on the instrument.

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L9207-10 TEST LEAD

1

2

1 Protective barrier

Be careful to not touch the metal part of the test lead beyond the safety barrier when contacting a conductor for measurement.

2 Sleeve

Attach to the pins to prevent short circuit accidents.

CAUTION

・Be sure to use the test leads with the sleeves attached when performing measurements in the

CAT III measurement category. In a CATI or

CATII environment, if the tips of the test leads do not reach the measurement object, remove the rigid insulating sleeve before measuring.

・When performing measurements with the sleeves attached, be careful to avoid damaging the sleeves. If the sleeves are inadvertently removed during measurement, be especially careful in handling the test leads to avoid electric shock.

・The tips of the metal pins are sharp, so take care not to injure yourself.

■ Removing and attaching the sleeves.

Removing the sleeves

Gently hold the bottom of the sleeves and pull the sleeves off.Safely store the removed sleeves so as not to lose them.

Attaching sleeves the

Insert the metal pins of the test leads into the holes of the sleeves, and firmly push them all the way in.

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1.4 Flowchart of button Operations

1.4.1 Current Measurements Mode

button

DCA ACA AC+DCA

RANGE button AUTO range

200.0 A range

2000 A range

AUTO range

200.0 A range

2000 A range

AUTO range

200.0 A range

2000 A range

SLOW/PEAK/Hz

button

SLOW

FAST

PEAK

NORMAL

SLOW

FAST

PEAK

Hz

NORMAL

SLOW

FAST

PEAK

Hz

NORMAL

MAX/MIN button

MAX

MIN

AVE

Instantaneous value

0ADJ/RESET

button

Auto-zeroadjustment

MAX

MIN

AVE

Instantaneous value

Disabled

MAX

MIN

AVE

Instantaneous value

Auto-zeroadjustment

HOLD+0ADJ/RESET

button

Disabled zero-cancel correction zero-cancel correction

* Neither "FAST" or "NORMAL" annunciator is on the display.

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1.4 Flowchart of button Operations

1.4.2 Voltage Measurements Mode

button

DC V

RANGE button

AUTO range

30.00 V range

300.0 V range

600 V range

SLOW/PEAK/Hz

button

SLOW

FAST

PEAK

NORMAL

AC V

AUTO range

30.00 V range

300.0 V range

600 V range

SLOW

FAST

PEAK

Hz

NORMAL

AC+DC V

AUTO range

30.00 V range

300.0 V range

600 V range

SLOW

FAST

PEAK

Hz

NORMAL

MAX/MIN button

MAX

MIN

AVE

Instantaneous value

MAX

MIN

AVE

Instantaneous value

MAX

MIN

AVE

Instantaneous value

0ADJ/RESET

button

Auto-zeroadjustment

Disabled Disabled

HOLD+0ADJ/RESET

button

Disabled zero-cancel correction zero-cancel correction

* Neither "FAST" or "NORMAL" annunciator is on the display.

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1.4.3 Frequency Measurements Mode

Current (AC A, AC+DC A) mode

Voltage (AC V, AC+DC V) mode

SLOW/PEAK/Hz

button

SLOW

FAST

Current mode

RANGE button

AUTO range

PEAK Hz NORMAL

Voltage mode

10.00 Hz range

100.0 Hz range

AUTO range

10.00 Hz range

100.0 Hz range

1000 Hz range 1000 Hz range

MAX/MIN button

MAX

MIN

AVE

Instantaneous value

0ADJ/RESET

button

Disabled

MAX

MIN

AVE

Instantaneous value

Disabled

1.4.4 Resistance Measurements Mode

Ω/ button

Ω

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1.5 Modes

For voltage and current, three modes are provided:

DC (direct current, ), AC (alternating current, ), and AC+DC (alternating current and direct current,

) modes. Select a proper mode according to the waveform shown below:

Mode

Input waveform

Display

0

O Average value displayed

(with polarity)

DC

( )

0

Not measurable

Not measurable

0

Not measurable

(zero displayed)

AC

( )

0

0

O RMS value

Not measurable

0

O RMS value

(without polarity)

0

AC+DC

( ) 0

O RMS value

O RMS value

0

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1.5 Modes

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1.5 Modes

Chapter 2

Measurement

2.1 Preparations

2.1.1 Installing or Replacing the Battery

CAUTION

Do not fix the back casing screws too tightly.

The torque about 0.5N

･m is recommended.

1. Remove the two fastening screws of the rear cover, using a Phillips screwdriver.

2. Remove the rear cover.

3. Remove the old battery without pulling the codes of the snap.

4. Securely connect the battery to the battery snap.

5. Replace the rear cover and tighten the fastening screws.

Battery: 6F22 (006P)

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2.1 Preparations

2.1.2 Attaching the Hand Strap

Explains how to attach the hand strap, for easy handling of the instrument in the field.

2.1.3 Turning the Power On and Off

Power ON

1. Press

POWER

to turn the instrument on. Verify that all segments of the display light up briefly. Then the model name is shown, and the bar graph indicates the battery condition.

Fresh battery

Battery capacity 50%

Battery capacity 0

Beep tone sounds 3 times

2. The DC current measurement mode is activated.

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Power OFF

1. Press

POWER

to turn the instrument off.

2.1.4 Battery Low Warning

(When mark lights)

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 check remaining battery life, check the bar graph, when powering on. (See 2.1.3: Turning the

Power On and Off) The bar graph provides a rough approximation of remaining battery life. Be careful for the battery life especially when using the REC function.

Batteries tend to increase in voltage somewhat when left unused for a long period. Even if the battery warning annunciator becomes temporarily off after the period, replace the battery as soon as possible.

If the battery is not replaced at this point in time, the annunciator may not light up immediately on the next occasion. Replace a new battery before it ruins a measurement or causes some other inconvenience.

(See 2.1.1: Installing or Replacing the Battery)

Low battery voltage detection function

After the mark lights and battery voltage drops below a certain level, the power goes off automatically. When this occurs, bAtt and Lo are displayed.

When power goes off after display of these marks, replace the exhausted battery with a new one.

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2.1.5 Pre-Operation Inspection

Confirm the following before using the meter:

The tips of the clamp-on sensor must not be deformed.

(Correct measurement may be impossible if the tips are deformed.)

The clamp-on sensor must not be cracked or damaged, and there must be no bare metal exposed.

(To avoid electric shock, do not use a clamp-on sensor with cracks or other damage, or exposed metal.)

The meter must be undamaged.

(To avoid electric shock, do not use the meter if it is damaged.)

Test lead insulation must not be scratched or torn, and there must be no metal exposed.

(If damage is found, to avoid electric shock, replace with Model L9207-10.)

The batteries should be in good condition when power is turned on.

(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.)

The display should show close to 0 A in ACA mode.

In DCA mode, pressing the 0ADJ/RESET button should display close to 0 A.

In ACV mode, shorting the test leads should display close to 0 V.

In

Ω mode, shorting the test leads should

display close to 0

Ω.

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2.2 Current Measurement

NOTE

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.

Attach the clamp around only one conductor.

Single-phase (2-wire) or three-phase (3-wire) cables clamped together will not produce any reading.

The display may show a measured value bigger than the actual value due to a magnet:c field interference.

The interference is less than 2 A during the measurement.

2.2.1 Measuring DC Current (DC A)

1. Press button to display .

2. Switch between the auto range and the manual range as necessary.

3. Press

0ADJ/RESET

button to make an auto-zeroadjustment (without clamping the measured conductor inside the clamp sensor) with the clamp sensor firmly closed. (See 3.1.1: Auto-Zero-

Adjustment Function).

ADJ

annunciator lights to indicate that auto-zero-adjustment is complete. (If you make an auto-zero-adjustment in the auto range, two current ranges will be adjusted in this mode.)

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2.2 Current Measurement

4. Open the top ends of the clamp core, orient the current direction indicator on the clamp in the current direction of the measured conductor, and clamp the conductor so that it passes through the center of the clamp core.

Wrong

Measured conductor

Current direction

Current direction indicator

NOTE

The DC A mode permits only DC current measurements that does not include the AC component (See 1.5: Modes).

The 200 A range will display up to 250 A, however, only the range from 10 A to 200 A can be displayed with guaranteed accuracy.

At any range, gross errors may occur at 1% or below of the range, whose accuracy is not guaranteed, as a result of internal corrective calculations.

2.2.2 Measuring AC Current (AC A)



3. Open the top ends of the clamp core and clamp the measured conductor so that it passes through the center of the clamp core.

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NOTE

Just after suspension of input, or when modes are switched under no input, the counter would not become zero for about 10 seconds. This is normal and simply reflects the workings of the internal circuit. But you can measure with guaranteed accuracy before the counter becomes zero.

Depending on ambient temperatures, the counter would not become zero under no input. If this happens, perform a zero-cancel correction (See

3.1.2: Zero-Cancel Correction Function).

During a f.s. input, the measurement response speed is about 250 ms during rise (0% to 90%) and about

500 ms (100% to 10%) during fall (See: Figs. 1 and

2).

The AC A mode does not allow measurement of DC waveforms, full-wave rectification waveforms, halfwave rectification waveforms, or DC+AC waveforms (See 1.5: Modes).


At any range, gross errors may occur at 1% or below of the range ,whose accuracy is not guaranteed, as a result of internal corrective calculations.

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Input wave

Response wave

200 A

100 A

250 ms

Fig. 1 Waveform of Measurement Response (Rise)

Input wave Response wave

500 ms

Fig. 2 Waveform of Measurement Response (Fall)

2.2.3 Measuring AC/DC Current (AC+DC A)



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3. Press

0ADJ/RESET

button to make an auto-zeroadjustment (without clamping the measured conductor inside the clamp sensor) with the clamp sensor firmly closed. (See 3.1.1: Auto-Zero-

Adjustment Function).

ADJ

annunciator lights to indicate that auto-zero-adjustment is complete.

4. If the counter fails to become zero under no input, press

HOLD

button and then press

0ADJ/RESET

button to perform a zero-cancel correction.


NOTE


Depending on ambient temperatures, the counter would not become zero under no input. If this happens, preform a zero-cancel correction (See

3.1.2: Zero-Cancel Correction Function).

The polarity of the input is not displayed, even if

DC current is measured in this mode. If the clamp sensor is reoriented, the measured values may change, but the values are within the guaranteed accuracy. (In case that you would like to measure a

DC current which doesn't have AC components, you should make the measurement in DC A mode.)


500 ms (100% to 10%) during fall (See 2.2.2

Measuring AC Current (AC A), Figs. 1 and 2).

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At any range, gross errors may occur at 1% or below of the range,whose accuracy is not guaranteed as a result of internal corrective calculations.

2.2.4 Peak Hold Measurement

The peak value of measured current is retained on the display to simplify reading. Peak fluctuations can also be viewed.

1. Press button and select a measurement mode for the measured circuit.

2. In DC A and AC+DC A modes, make an auto-zeroadjustment by

0ADJ/RESET

button (See 3.1.1:

Auto-Aero Adjustment Function).

3. Set to PEAK. The measurement mode is switched by

SLOW/PEAK/Hz

button as follows.

SLOW FAST

(The unit symbol blinks.)

PEAK Hz

(Except

DC)

NORMAL

4. Switch between the auto and the manual range as necessary. (If you are unable to estimate the peak current value, start at the 2000A range.)

5. Before the measurement, press

0ADJ/RESET

button to reset the residual data.


_______________________________________________________


NOTE

The polarity of the input is not displayed during peak measurements. The measured values may change if the clamp sensor is reoriented, but the values are within the guaranteed accuracy.

For peak measurements, internal resetting occurs every 250 ms. This may cause a peak detection failure, depending on the timing.

Even after clamping, press

0ADJ/RESET

button to reset the data as necessary.

In case that the counter doesn't become zero under no input in peak measurement mode, even though you pressed

0ADJ/RESET

button to reset the peak data, the clamp sensor may be magnetized. Quit the peak measurement mode, and perform the auto-zero adjustment by

0ADJ/RESET

button . Then make the settings again. (A few counts would remain,even if you push

0ADJ/RESET

button .)

The hold value does not change, unless a larger value is measured, but be careful to avoid accidental loss of data resulting from the auto power-off function. (See 3.5: Automatically Turning Power off (Auto Power-Off Function APS))

Use the REC function to make measurements longer than the auto power OFF time.

To check transitional peak value, press

MAX/MIN

button to shift to the instantaneous value (no annunciator).

MAX MIN AVE Instantaneous value

(no annunciator)

_______________________________________________________


2.3 Voltage Measurement

CAUTION

For safety reasons, when taking measurements, only use the L9207-10 Test Lead provided with the instrument.

2.3.1 Measuring DC Voltage (DC V)


2. Insert the red test lead to V/

Ω and the black test lead to COM of the voltage/resistance input terminal.


4. In case that the counter isn't zero, press

0ADJ/RESET

button to make an auto-zeroadjustment.

ADJ

annunciator lights to indicate that auto-zero-adjustment is complete. (See 3.1.1: Auto-

Zero-Adjustment Function)

NOTE

5. Attach or remove the rigid insulating sleeve as required by the measurement category.

6. Carefully contact the test leads to a circuit.

Be sure to use the test leads with the sleeves attached when performing measurements in the CAT

III measurement category. In a CATI or CATII environment, if the tips of the test leads do not reach the measurement object, remove the rigid insulating sleeve before measuring.

_______________________________________________________

2.3 Voltage Measurement

NOTE

You can perform the auto-zero-adjustment up to 4% of the range.

A lit - annunciator indicates that potential is higher at the black test lead than at the red test lead.

The DC V mode permits only DC voltage measurements that does not include the AC component (See 1.5: Modes).

Every range will display up to 125% of the range, however, only the range from 10% to 100% can be displayed with guaranteed accuracy.


2.3.2 Measuring AC Voltage (AC V)

1. Press to display ∼.






NOTE




_______________________________________________________


NOTE

Depending on ambient temperatures, the counter would not become zero under no input, if this happens, press

HOLD


0ADJ/RESET

button to perform a zero-cancel correction. (See 3.1.2: Zero-

Cancel Correction Function)


500 ms (100% to 10%) during fall (See 2.2.2:


The AC V mode does not allow measurement of DC waveforms, full-wave rectification waveforms, halfwave rectification waveforms, or DC+AC waveforms (See 1.5: Modes).



2.3.3 Measuring AC/DC Voltage (AC+DC V)





4. If the counter fails to become zero under no input, press

HOLD


0ADJ/RESET

button to perform a zero-cancel correction. (See

3.1.2: Zero-Cancel Correction Function)



_______________________________________________________


NOTE




The polarity of the input is not displayed, even if DC voltage is measured in this mode. If the connections of test leads are moved, the measured values may change, but the values are within the guaranteed accuracy. (In case that you would like to measure DC voltage which doesn't have AC components, you should make the measurement in DC V mode.)


500 ms (100% to 10%) during fall (See 2.2.2:




2.3.4 Peak Hold Measurement

The peak value of measured voltage is retained on the display to simplify reading. Peak fluctuations can also be viewed.

1. Press and select a measurement mode for the measured circuit.



_______________________________________________________


3. Set to PEAK. The measurement mode is switched by

SLOW/PEAK/Hz

as follow.

NOTE

SLOW FAST


PEAK Hz

(Except

DC)

NORMAL

4. Switch between the auto and the manual range as necessary. (If you are unable to estimate the peak voltage value, start at the 600 V range.)



7. Before the measurement, press

0ADJ/RESET

button to reset the residual data.



The polarity of the input is not displayed during peak measurements. If the connections of test leads are moved, the measured values may change, but the values are within the guaranteed accuracy.

For peak measurements, internal resetting occurs every 250 ms. This may cause a peak detection failure, depending on the timing.

To check transitional peak value, press

MAX/MIN

button to shift to the instantaneous value (no annunciator).

The zero adjustment is not effective at peak hold measurement mode.

MAX MIN AVE Instantaneous value

(no annunciator)

_______________________________________________________


2.4 Frequency Measurement

2.4.1 Frequency Measurement in Current Mode

1. Press button and select AC or AC+DC, depending on the circuit to be measured.

2. If the current range of the measured circuit is known, set the current range to the manual range.

3.

SLOW/PEAK/Hz

button switches the annunciators as follows. Select Hz by pressing the button. (The unit symbol A blinks, and a current value is displayed on the bar graph.)

SLOW FAST


PEAK Hz NORMAL

4. Switch the auto range and the manual range as necessary.


NOTE

At the 100 Hz and 1000 Hz ranges, ---- appears on the counter when the frequency is lower than 10 Hz.

---- appears on the counter, if the frequency is lower than 1 Hz.

O. L. appears on the counter, if the frequency is higher than 1 kHz.

If an input value is significantly lower than the range, an accurate measurement may not be achieved, resulting in ----, O. L. or display fluctuations.

_______________________________________________________

2.4 Frequency Measurement

NOTE

The 10 Hz range or 100 Hz range will display up to

125% of each range, however, only the range from

10% to 100% can be displayed with guaranteed accuracy.

The frequencies, whose waveforms are special such as inverters, would not be measurable, when the carrier frequencies are lower than several kHz.

Full-wave rectification indicates twice the actual value, due to an AC coupling in the internal circuit.

It would take time to stabilize the counter, depending on the frequency range or the input frequency.

2.4.2 Frequency Measurement in Voltage Mode

CAUTION


1. Press button and select AC or AC+DC, depending on the circuit to be measured.

2. If the voltage range of the measured circuit is known, set the voltage range to the manual range.


Ω and the black test lead to COM of the voltage/resistance terminal.

4.

SLOW/PEAK/Hz

button switches the annunciators as follows. Select Hz by pressing the button. (The unit symbol V blinks, and a voltage value is displayed on the bar graph.)

SLOW FAST


PEAK Hz NORMAL

_______________________________________________________




NOTE




At the 100 Hz and 1000 Hz ranges, ---- appears on the counter when the frequency is lower than 10 Hz.

---- appears on the counter, if the frequency is lower than 1 Hz.

O. L. appears on the counter, if the frequency is higher than 1 kHz.

If an input value is significantly lower than the range, on accurate measurement may not be achieved, resulting in ----, O. L. or display fluctuations.

The 10 Hz range or 100 Hz range will display up to

125% of each range, however, only the range from

10% to 100% can be displayed with guaranteed accuracy.

The frequencies, whose waveforms are special such as inverters, would not be measurable, when the carrier frequencies are lower than several kHz.

Full-wave rectification indicates twice the actual value, due to an AC coupling in the internal circuit.

It would take time to stabilize the counter, depending on the frequency range or the input frequency.

_______________________________________________________


2.5 Resistance Measurement

DANGER


Resistance measurement mode is selected. Doing so may damage the instrument and result in personal injury.


CAUTION


1. Press

Ω/ button to display

Ω. Auto-ranging is used for resistance measurement.


Ω and the black test lead to COM of the voltage/resistance terminal.

3. Attach or remove the rigid insulating sleeve as required by the measurement object.

4. Touch the tips of the red and black test leads together and verify that 0

Ω is displayed.

5. Then connect the test leads to the test points for measurement.

_______________________________________________________

2.5 Resistance Measurement

NOTE

If voltage is applied inadvertently, the internal circuitry is protected up to 600 VAC.

If voltage larger than approximately 2 or 3 V is input, the Resistance measurement mode cannot be selected.

If the display shows larger than 7 or 8 A at 200 A range in the DCA mode, the Resistance measurement mode cannot be selected. Press the

0ADJ/RESET

key to reset the display to 0.

_______________________________________________________

2.5 Resistance Measurement

2.6 Continuity Check

DANGER


Continuity check mode is selected. Doing so may damage the instrument and result in personal injury.


CAUTION


1. Press

Ω/ button to display . Auto-ranging is used for continuity checking.



3. Attach or remove the rigid insulating sleeve as required by the measurement object.

4. Touch the tips of the red and black test leads together and verify that 0

Ω is displayed.

_______________________________________________________

2.6 Continuity Check

5. Then connect the test leads to the test points for measurement.

The beeper sounds when the measured resistance is below about 30

Ω.

NOTE

・If voltage is applied inadvertently, the internal circuitry is protected up to 600 VAC.

・The measured resistance value appears on the digital display.

・If voltage larger than approximately 2 or 3 V is input, the Continuity check mode cannot be selected.

・If the display shows larger than 7 or 8 A at 200 A range in the DCA mode, the Resistance measurement mode cannot be selected. Press the

0ADJ/RESET

key to reset the display to 0.

_______________________________________________________


_______________________________________________________


Chapter 3

Useful Functions

3.1 Adjusting and Correcting Values

3.1.1 Auto-Zero-Adjustment Function

The auto-zero-adjustment function is used to adjust offsets in the internal circuit automatically that result from temperature characteristics or clamp sensor magnetization. The clamp core is magnetized during a large DC current measurement, or when a powerful magnet is placed close to the clamp core.

1. Wait until the counter is stable under no input.

Then, press

0ADJ/RESET

button.

ADJ

annunciator lights.

NOTE

You can perform the auto-zero-adjustment, if the counter displays within 45 A in a current mode.

When there is an input or the counter decreases, the measurement accuracy will be spoiled by pressing

0ADJ/RESET as well as the accurate auto-zeroadjustment. If inaccurate auto-zero-adjustment is performed, perform the correct procedure again.

It would take approximately 20 seconds to stabilize the counter in AC+DC A mode.

_______________________________________________________

3.1 Adjusting and Correcting Values

NOTE

Use the zero-cancel correction function if the counter fails to revert to zero after correct auto-zeroadjustment in AC+DC A mode.

In a current mode, if you press

0ADJ/RESET

button again during the auto-zero-adjustment in the internal circuit, the auto-zero-adjustment is canceled.

The auto-zero-adjustment is not effective at auto range in DCV mode. If you perform the auto-zeroadjustment at manual range, the auto-zeroadjustment is invalid by changing the range.

3.1.2 Zero-Cancel Correction Function

Use the zero-cancel correction function when the counter fails to become zero under no input in AC

A, AC+DC A, AC V, or AC+DC V mode.

1. Press

HOLD

button to display

HOLD

annunciator.

2. Press

0ADJ/RESET

button.

ADJ

annunciator blinks.

NOTE

When there is an input or the counter decreases, the measured values will be evaluated lower by pressing

0AJD/RESET

button.

If the counter is zero, the zero-cancel correction function does not work.

In AC+DC A mode, the zero-cancel correction function does not work, unless auto-zero-adjustment is complete.

The zero-cancel correction function is not effective at auto range in DCV mode. If you perform the zero-cancel correction at manual range, the zerocancel correction is invalid by changing the range.

_______________________________________________________

3.1 Adjusting and Correcting Values

3.2 Pausing and Reading the Display

(Data Hold Function

HOLD

)

This function freezes the counter at any desired point for easy reading.

1. Press

HOLD

button.

HOLD

annunciator lights on the display and the digital display value and bar graph display are maintained.

If you press

RANGE

button during the data hold function, the bar graph display the present range.

The data hold function is available for all measurements.

2. To cancel the data hold function, press

HOLD

button again.

_______________________________________________________

3.2 Pausing and Reading the Display (Data Hold Function HOLD )

3.3 Alteration of Counter Updates

The counter is updated twice per second when powering on. The counter update may be altered according to measurement conditions.

SLOW/PEAK/Hz

button changes an annunciator as follows:

SLOW FAST

(The unit

PEAK annunciator blinks.)

Hz

(Except DC)

NORMAL

3.3.1 SLOW mode

If the counter fluctuates rapidly and is hard to read, you can select a slower update rate (once every 3 seconds) by pressing

SLOW/PEAK/Hz

button.

3.3.2 FAST mode

For current measurements and voltage measurements, the counter is updated four times per second in FAST mode. You can measure abrupt changes such as starting currents.

The unit symbol A or V blinks.

To facilitate reading when measuring a starting current, use the record (REC) function to hold the maximum value (MAX).

_______________________________________________________

3.3 Alteration of Counter Updates

3.4 Storing Values in Memory

(Recording Function REC)

Use the recording function to hold the maximum and minimum measured values and maximum/minimum averages. (Not available for resistance measurements.)

1. Measurement indicated value

Pressing the

MAX/MIN

button during measurements of current or voltage activates the recording function. REC flashes and the instrument saves the maximum value (MAX), minimum value (MIN), and average value (AVE) in internal memory from the instant you press the

MAX/MIN

button.

Pressing the

MAX/MIN

button with the recording function activated switches the display as shown below. If MAX, MIN, or AVE is not displayed, an instantaneous value is assumed.

MAX →MIN→AVE→Instantaneous value

(no annunciator)

Data (MAX, MIN, AVE) remains displayed while the display is switched. If maximum or minimum data is updated in the meantime, however, the data values will change.

With the recording function activated, the auto power-off function remains disabled. (APS off.)

The average value (AVE) displayed is calculated by:

Average Value = [(Maximum value + Minimum

Value)/2].

_______________________________________________________

3.4 Storing Values in Memory (Recording Function REC)

If the recording function is activated and

Instantaneous value (no annunciator) selected after you activate PEAK mode with the

SLOW/PEAK/Hz

button, you can see the fluctuation of the peak.

2. Display of Elapsed Time

When you press the

MAX/MIN

button to activate the recording function, the bar graph segments flash and the elapsed time appears.

When "min" is shown in the right-hand corner of the bar graph, each segment of the bar graph corresponds to one minute.

Every time one minute elapses, one segment of the flashing bar graph goes on. When all segments on the bar graph go on, the elapsed time is 30 minutes.

When the elapsed time exceeds 30 minutes, one segment of the flashing bar graph goes off every time one minute elapses.

When the segments left of a flashing segment remain on: the number of "on" segments represents the elapsed time (0 ~ 29).

The illustration below shows when 20 minutes have elapsed:

_______________________________________________________


When the segments right of a flashing segment remain on: the number of "off" segments (+30) represents the elapsed time (30 ~ 59).

The illustration below shows when 50 minutes have elapsed:

When digital display switches the average value

(AVE) to a instantaneous value when you press the

MAX/MIN

button, the right corner of the bar graph indicates hours. In this mode, each segment of the bar graph corresponds to one hour. The way to read the bar graph here is similar to reading it in minutes. When all bar graph segments remain on, the elapsed time is 29 hours.

The illustration below shows when one hour, 40 minutes have elapsed.

3. Deactivation of Recording Function

Pressing the

HOLD

button deactivates the recording function.

HOLD

goes on, REC stops flashing and goes on, and the elapsed time stops incrementing.

While the recording function is being deactivated, data is not updated, even if the clamp sensor is disconnected from the conductor.

Pressing the

HOLD

button again cancels

HOLD

display and activates the recording function again, with REC flashing again.

_______________________________________________________


4. Resetting of Recording Function

Push

0ADJ/RESET

button, in the case that data is reset during the recording function action.

NOTE

5. Cancellation of Recording Function

To cancel the recording function, press the related function button ( or ) for the measurement in progress. Once the recording function is canceled, the auto power-off function becomes effective. (

APS

goes on.)

For a long term measurement, check how much the battery power remains. (Shown on the bar graph at power on.)

When starting the recording function (REC) in an auto range, the range is set as the range of when that pushed

MAX/MIN

button.

When you need minimum value and average value data, make sure to activate the recording function during measurement. If the function is activated when there is no input, the minimum value will remain zero. To deactivate the recording function, press the

HOLD

button and read minimum value and average value to terminate measurement. If you disconnect the clamp or test lead from the circuit under measurement without deactivating the recording function beforehand, the minimum value will be zero.

When the instrument is turned off, accumulated data are lost.

_______________________________________________________


3.5 Automatically Turning Power Off

(Auto Power-Off Function

APS

)

When the

APS

annunciator is displayed, the auto power-off function is active.

If no button is pressed for about 10 minutes, the instrument turns itself off automatically.

Immediately before turning off automatically,

APS

annunciator blinks and a beep tone is heard for about 30 seconds.

By pressing any button except

POWER

button, you will extend the powered state for another 10 minutes.

Procedure for disabling the auto power-off function.

Press

POWER

button with holding down

HOLD

button, when you turn power on.

Use the recording function (REC) by pressing

MAX/MIN

button.

_______________________________________________________

3.5 Automatically Turning Power Off (Auto Power-Off Function

APS )

3.6 Beep Tone

To disable the beep tone

To disable the beep tone, hold

RANGE

button when turning the instrument on by pressing

POWER

button.

Warning sounds and the continuity beep cannot be disabled.

To enable the beep tone

The beep is re-enabled the next time you press the

POWER

button to turn the meter on.

_______________________________________________________

3.6 Beep Tone

Chapter 4

Specifications

4.1 Measurement Specifications

Temperature and humidity for guaranteed accuracy

23 5 (73 9 ), 80%RH or less (no condensation) (This is guaranteed When " " mark is not lighting.)

Guaranteed accuracy period 1 year, or opening and closing of the Clamp Sensor 10,000 times, whichever comes first

4.1.1 Current Measurement Specifications

Current display accuracy

1. DC current A (mean value)

Range

(Accuracy Range)

Resolution

200 A (10.0 to 200.0 A)

2000 A (100 to 2000 A)

0.1 A

1 A

DC

1.3%rdg. 3dgt.

1.3%rdg. 3dgt.

2. AC current Arms (true rms)

Range

(Accuracy Range)

Resolution 45 to 66Hz

10 to 45,

66 to 1kHz

200 A (10.0 to 200.0 A) 0.1 A 1.3%rdg. 3dgt.

2.0%rdg. 5dgt.

(100 to 1800 A)

2000 A

(1800 to 2000 A)

1 A

1.3%rdg. 3dgt.

2.0%rdg. 5dgt.

2.3%rdg. 3dgt.

Measurement response (during a f.s. input):

Rise response time (0% to 90%) 250 ms or less

Fall response time (100% to 10%) 500 ms or less

_______________________________________________________

4.1 Measurement Specifications

3. AC+DC current Arms (true rms)

Range

(Accuracy Range)

Resolution DC, 45 to 66Hz

10 to 45,

66 to 1kHz

200 A (10.0 to 200.0 A) 0.1 A 1.3%rdg. 13dgt.

2.0%rdg. 7dgt.

(100 to 1800 A)

2000 A

(1800 to 2000 A)

1 A

1.3%rdg. 13dgt.

2.0%rdg. 7dgt.

2.3%rdg. 13dgt.

Measurement response (during a f.s. input):

Rise response time (0% to 90%) 250 ms or less

Fall response time (100% to 10%) 500 ms or less

Peak measurement accuracy (Peak hold function)

During continuous input of sine waves

1. DC current A peak (wave peak value)

Range

(Accuracy Range)

200 A (10 to 500 A)

(100 to 2300 A)

2000 A

(2300 to 2840 A)

Resolution

1 A

DC

1.3%rdg. 7dgt.

1.3%rdg. 7dgt.

6.0%rdg. 7dgt.

2. AC current A peak (wave peak value)

Range

(Accuracy Range)

200 A (10 to 500 A)

(100 to 2300 A)

2000 A

(2300 to 2840 A)


1 A

10 to 45,

66 to 1kHz

1.3%rdg. 7dgt.

2.0%rdg. 7dgt.

1.3%rdg. 7dgt.

2.0%rdg. 7dgt.

6.0%rdg. 7dgt.

3. AC+DC current A peak (wave peak value)

Range

(Accuracy Range)

200 A (10 to 500 A)

(100 to 2300 A)

2000 A

(2300 to 2840 A)

ResolutionDC, 45 to 66Hz

1 A

10 to 45,

66 to 1kHz

1.3%rdg. 7dgt.

2.0%rdg. 7dgt.

1.3%rdg. 7dgt.

2.0%rdg. 7dgt.

6.0%rdg. 7dgt.

_______________________________________________________


Frequency measurement Hz

Display accuracy

Range

(Accuracy Range)

Resolution

10 Hz (1.00 to 10.00 Hz) 0.01 Hz

100 Hz (10.0 to 100.0 Hz) 0.1 Hz

1000 Hz (100 to 1000 Hz) 1 Hz

0.3%rdg. 1dgt.

0.3%rdg. 1dgt.

1.0%rdg. 1dgt.

Current Specifications

Maximum input current

Effect of conductor position

External magnetic field interference

Maximum rated voltage to earth

2000 Arms continuous, 2840 Amax.

See Fig.3

within 0.7% (in any direction from sensor center)

AC 400 A/m (external magnetic fields) corresponds to 2 A or less (display) max. 600 Vrms

Fig.3 Frequency-dependent deletion characteristics

_______________________________________________________


4.1.2 Voltage Measurement Specifications

Voltage display accuracy

1. DC voltage V (mean value)

Range

(Accuracy Range)

30 V (3.00 to 30.00 V)

300 V (30.0 to 300.0 V)

600 V (60.0 to 600V)

Resolution

0.01 V

0.1 V

1 V

DC

1.0%rdg. 3dgt.

1.0%rdg. 3dgt.

1.0%rdg. 3dgt.

2. AC voltage Vrms (true rms)

Range

(Accuracy Range)

30V (3.00

∼30.00V)

300V (30.0

∼300.0V)

600V (60.0

∼600V)

Resolution

0.01V

0.1V

1V

45 to 66Hz

10 to 45,

66 to 1kHz

1.0%rdg. 3dgt.

1.5%rdg. 5dgt.

1.0%rdg. 3dgt.

1.5%rdg. 5dgt.

1.0%rdg. 3dgt.

1.5%rdg. 5dgt.

3. AC+DC voltage Vrms (true rms)

Range

(Accuracy Range)

Resolution DC, 45 to 66Hz

30 V (3.00 to 30.00 V) 0.01 V

300 V (30.0 to 300.0 V) 0.1 V

600 V (60.0 to 600 V) 1 V

10 to 45,

66 to 1kHz

1.0%rdg. 13dgt.

1.5%rdg. 13dgt.

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

Peak measurement accuracy (Peak hold function)

During continuous input of sine waves

1. DC voltage V peak (wave peak value)

Range

(Accuracy Range)

30 V (3.0 to 75.0 V)

300 V (30 to 750 V)

600 V (60 to 1000 V)

Resolution

0.1 V

1 V

DC

1.0%rdg. 7dgt.

1.0%rdg. 7dgt.

1.0%rdg. 7dgt.

_______________________________________________________


2. AC voltage V peak (wave peak value)

Range

(Accuracy Range)

30 V (3.0 to 75.0 V)

300 V (30 to 750 V)

600 V (60 to 700 V)

600 V (700 to 1000 V)


0.1 V

1 V

10 to 45,

66 to 1kHz

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

2.0%rdg. 20dgt.

2.5%rdg. 20dgt.

3. AC+DC voltage V peak (wave peak value)

Range

(Accuracy Range)

30 V (3.0 to 75.0 V)

300 V (30 to 750 V)

600 V (60 to 700 V)

600 V (700 to 1000 V)

Resolution DC,45 to 66Hz

0.1 V

1 V

10 to 45,

66 to 1kHz

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

1.0%rdg. 7dgt.

1.5%rdg. 7dgt.

2.0%rdg. 20dgt.

2.5%rdg. 20dgt.

Frequency measurement Hz

Display accuracy

Range

(Accuracy Range)

10Hz (1.00 to 10.00 Hz)

100Hz (10.0 to 100.0 Hz)

1000Hz (100 to 1000 Hz)

Resolution

0.01 Hz

0.1 Hz

1 Hz

0.3%rdg. 1dgt.

0.3%rdg. 1dgt.

1.0%rdg. 1dgt.

Voltage Specifications

Maximum input voltage

1000 V max.

_______________________________________________________


4.1.3 Resistance Measurement Specifications

Range

(Accuracy Range)

Resolution Accuracy

Overload protection

Open terminal voltage

1 k

Ω

(10 to 999

Ω)

10 k

Ω

(0.95 k ∼10.00 k

Ω)

1

Ω

0.01 k

Ω

(1.5%rdg.

+5dgt.)

600 Vrms

3.1 VDC or less

4.1.4 Continuity Check

Range Resolution

Threshold level

Overload protection

1 k

Ω

1

Ω

30

Ω 5 Ω or less

600 Vrms

Open terminal voltage

3.1 VDC or less

_______________________________________________________


4.2 General Specifications

Accessory Functions:

Auto-zero adjustment function

Beep tone

Pressing

Data hold function

Automatic shutdown after 10.5 1 minutes. Beep tone warning before the shutdown. Extending and disabling possible.

ON/OFF

0ADJ/RESET

button once in

DCA, AC+DCA, or DCV mode.

Zero cancel function

Pressing

0ADJ/RESET

button once with holding HOLD button in AC or

AC+DC mode.

Recording Maximum (MAX), minimum (MIN), average (AVE) value display selectable for current, voltage and frequency measurements

Data hold

Auto power-off

Display

Digital counter

LCD panel

2500 counts max. (current)

3750 counts max. (voltage)

1250 counts max. (frequency)

1000 counts max. (Resistance)

Bar graph display

Over-range display

Battery low warning

35 segments

"O.L." (bar graph)

(When this mark is lighting, the accuracy is not guaranteed.)

Data hold annunciator

HOLD

_______________________________________________________

4.2 General Specifications

Auto power-off annunciator

Units

APS

Zero suppression

Display update rate

A, V, Hz,

Ω

5 counts

Digital counter

NORMAL approx. 2 times/second

SLOW approx. 1 time/3 seconds

FAST approx. 4 times/second

Bar graph

Display response time

(the range is fixed,

0% to 100%) approx. 4 times/second

Current, Voltage: 1 s max.

Frequency:

1 s max. (1000 Hz, 100 Hz range)

2.5 s max. (10 Hz range)

Resistance, Continuity check: 1.1 s max.

Range switching

Circuit dynamic characteristics

(crest factor)

Auto range, manual (fixed) range

(selectable). (except for resistance, continuity check)

2.5 max. (1.42 for 2000 A range, 1.7 for

600 V range)

Withstand voltage

Clamp sensor - Chassis, clamp sensor circuit: 5.312 kV AC for 15 seconds

Indoor, altitude up to 2000 m (6562-ft) Location for use

Applicable standards

Safety:

EN61010

Voltage input: Pollution level 2, measurement category III (expected transient overvoltage: 6000 V)

EN60529 IP40 (protected against access to hazardous parts with a wire)

EMC: EN61326

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Maximum conductor diameter for measurement

Operating temperature and humidity range

Temperature characteristics

φ55 mm max.

0 to 40 (32 to 104 ),

80%RH or less (no condensation)

In 0 to 40 (32 to 104 ) range: 0.1

accuracy specifications/

Storage temperature range

Power source

-10 to 50 (14 to 122

(no condensation)

),

Maximum power consumption

Accessories

One 6F22 (006P) 9 V battery

110 mVA

Battery life

Mass

Approx. 20 hours (continuous, no load)

External dimensions Approx. 62W 260H 39D mm

Approx. 2.44"W 10.24"H 1.54"D

Approx. 540 g

Approx. 19.0 oz.

L9207-10 Test Lead (red and black) 1

9345 Carrying Case 1

Hand Strap 1

Battery 6F22(006P) 1

Instruction manual 1

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Chapter 5

Maintenance and Service

5.1 Cleaning

To clean the instrument, wipe it gently with a soft cloth moistened with water or mild detergent. Never use solvents such as benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case.

Measurements are degraded by dirt on the mating surfaces of the clamp-on sensor, so keep the surfaces clean by gently wiping with a soft cloth.

To avoid corrosion from battery leakage, remove the batteries from the instrument if it is to be stored for a long time.

5.2

After service

The minimum stocking period for replacement parts is five years after end of production.

If damage is suspected, check the "5.3 Troubleshooting" section before contacting your dealer or Hioki representative.

When sending the instrument for repair, remove the batteries and pack carefully to prevent damage in transit.

Include cushioning material so the instrument cannot move within the package. Be sure to include details of the problem. Hioki cannot be responsible for damage that occurs during shipment.

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5.1 Cleaning

5.3 Troubleshooting

Before returning for repair

If the instrument seems not to be working normally, check the following points first before requesting service.

Battery

Symptom

Remedy

Replace battery.

(See 2.1:

Preparations)

Instrument does not come on.

indication appears and instrument immediately turns off.

indication appears.

Instrument turns off during use.*

Yes

Yes

Yes

Yes

Voltage and resistance cannot be measured.

If problem persists, request service.

Battery clip

Check connection of battery to clip.

Yes

Yes

Test leads

Check test leads for broken wire.

Yes

NOTE

* When APS (auto power-off) is effective, the instrument is automatically shut down when no button is pressed for about 10 minutes. (See 3.5:

Automatically Turning Power Off (Auto Power-Off

Function

APS

))

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5.3 Troubleshooting

Other symptoms that may occur are as follows.

If no power is supplied:

Check that it has sufficient remaining power. (See 2.1.4:

Battery Low Warning (When mark lights) )

The counter doesn't become zero:

In DCA, AC+DCA, or DCV mode

Use the auto-zero adjustment function (See 3.1.1).

(If this occures in AC+DCA mode after performing the auto-zero-adjustment, perform the zero cancel correction function.)

In ACA, ACV, or AC+DCV mode

Use the zero-cancel correction function (See 3.1.2).

Resistance measurement or continuity check

If 0

Ω is displayed when the red and black test leads are unconnected (open-circuit), internal circuitry may be damaged, requiring repair service.

The measured value is larger than the estimated value.

Current / Voltage / Frequency measurement:

Check that you're using the proper range.

Examine the waveform to confirm that no components but the estimated frequency are being used.

Check that the counter has been reset with

0ADJ/RESET

button before peak measurement.

Look for magnetic fields, electrical fields or possible noise sources near the instrument.

Check the waveform. Some special frequencies can't be measured, such as those of inverters. (At frequency measurement)

_______________________________________________________


The measured value is smaller than the estimated value.

Current / Voltage measurement:

Check that the clamp sensor is firmly closed. (At current measurement)

Check that the test leads are fully connected. (At voltage measurement)

Check that the frequency of the measured circuit is within the range provided in the specifications. (A smaller value will be displayed for a high inverter carrier frequency.) *Items within parentheses apply to current measurement only

Check that the proper steps have been taken, according to procedure described in 3.1.1: Auto-zero adjustment function and 3.1.2: Zero-cancel correction function.

Check that you're using the proper mode. (See 1.5:

Modes.)

Check that the peak value is below the circuit dynamic value provided in the specifications. (To check transitional peak values, see Notes in 2.2.4 and 2.3.4:

Peak Hold Measurement.)

Check that the crest factor (peak value / RMS value) is below the circuit dynamic value provided in the specifications.

Check that the battery warning annunciator is off.

Frequency measurement:

Check the waveform. Some special frequencies can't be measured, such as those of inverters.

Check that the input value corresponds to 10% or more of the range.

_______________________________________________________


The measured value fluctuates.

Check that the measured circuit is stable.

During voltage measurements, check that the test leads are fully connected.

Check the waveform. Some special frequencies can't be measured, such as those of inverters.

The displayed value is out of range O.L.

Resistance measurement or continuity check

If O.L. is displayed when the test leads are shorted together, a test lead may be broken or internal circuitry may be damaged.

Check for broken test leads by taking a voltage measurement. If a test lead is broken, replace with

Model L9207-10 Test Lead.

Current measurment o If nothing can be measured (no input detected) the sensor element or internal circuitry may be damaged, requiring repair service. If the damage is to internal circuitry, the displayed value may appear over range

O.L. during voltage measurement.

Voltage measurement

If over range is indicated when nothing is being measured, internal circuitry may be damaged.

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5.4 Error Message

Repair is required if E.001 to E.004 is indicated on the counter, when power is turned on.

Error No.

E001

E002

E003

E004

Symptom

Checksum error in single-chip microcontroller internal ROM

Checksum error in single-chip microcontroller internal RAMR/W

Checksum error in

EEPROM

EEPROM data error

Remedy

Component replacement required.

Please contact your dealer or HIOKI representative.

_______________________________________________________

5.4 Error Message

Instruction Manual

複数ない場合は上段を削除

XXXX

XXXX

XXXX

xxxx 20xx Edition 1/ Revised edition x xxxxA98x-xx xx-xxH

HIOKI 3285-20 Clamp-on AC/DC HiTester Instruction Manual

Assistant Bot

Instruction Manual

CLAMP ON AC/DC HiTESTER

Contents

Introduction

Verifying Package Contents

Safety Information

Operating Precautions

Preliminary Check

Chapter 1 Overview

Chapter 2 Measurement 15

iii viii ii i xiv

1

39

Chapter 3 Useful Functions

Chapter 4 Specifications

49

Chapter 5 Maintenanceand Service

59

Introduction

Request

Verifying Package Contents

Main unit

Supplied accessories

Safety Information

Safety Symbols

Accuracy

Measurement categories (Overvoltage categories)

Operating Precautions

Preliminary Check

Chapter 1

Overview

1.1 Product Overview

1.2 Features

1.3 Names and Functions of Parts

3285-20

10

15

16

11

12

5

6

9

8

7

13

3

4

1

2

14

AUTO

SLOW

REC

MAX

MIN

AVE

Ω

Hz

V

PEAK

RMS

A hour min

L9207-10 TEST LEAD

1.4 Flowchart of button Operations

1.4.1 Current Measurements Mode

1.4.2 Voltage Measurements Mode

1.4.3 Frequency Measurements Mode

1.4.4 Resistance Measurements Mode

1.5 Modes

Chapter 2

Measurement

2.1 Preparations

2.1.1 Installing or Replacing the Battery

2.1.2 Attaching the Hand Strap

2.1.3 Turning the Power On and Off

2.1.4 Battery Low Warning

(When mark lights)