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FT6380-90
User manual
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HIOKI IR4057-90, FT6380-90 User manual

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Page 1
FT6380-50
Instruction Manual

CLAMP ON EARTH TESTER
Feb. 2021 Revised edition 1 FT6380B981-01 21-02H
EN
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Page 2

Contents

Introduction .......................................................................... 1
Verifying Package Contents ................................................ 2
Option (sold separately) ....................................................... 3
Safety Information ................................................................4
Operating Precautions ......................................................... 8
Chapter 1 Overview 13
1.1 Product Overview ..............................................13
1.2 Features ............................................................14
1.3 Names and Functions of Parts .......................... 16
Operation key ............................................................ 18
 
Display Indicators ...................................................... 19
Chapter 2 Measurement 21
2.1 Measurement process .......................................21
2.2 Preparing for Measurement .............................. 22
Attaching the Strap .................................................... 22
 
Installing (or Replacing) the Battery and
Wireless Adapter ....................................................... 23
2.3 Pre-Operation Inspection ..................................26
Using the included resistance check loop to
inspect the instrument ................................................ 27
2.4 Measurement Procedure ...................................28
Resistance Measurement .......................................... 29
 
Current Measurement ................................................ 33
2.5 Convenient function .......................................... 37
Data hold function (Holding the measured value) ..... 37
 
Backlight function
(Making measurements in a dark location) ................ 37
Filter function (Rejecting noise) ................................. 38
Alarm function (Judging measured values and sounding an alarm).. 39
i
FT6380B981-01
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ii
Memory function (Saving measurement data) ........... 42
Wireless Communication Function
(GENNECT Cross) ..................................................... 46
Useful functionality of the Z3210 ................................49
Function mode ...........................................................50
2.6 Advanced Settings and Functions .....................51
Enabling/disabling the measurement range
display function .......................................................... 52
Enabling/disabling the auto-power-saving (APS)
function....................................................................... 53
Reverting the instrument to factory settings
(system reset) ............................................................ 54
Chapter 3 Specifications 55
3.1 General Specifications .......................................55
3.2 Input, Output, and Measurement Specifications 56
3.3 Function specifications ......................................62
Chapter 4 Maintenance and Service 63
4.1 Cleaning ............................................................63
4.2 Troubleshooting .................................................64
Inspection and Repair ................................................ 64
 
Before returning for repair .......................................... 64
4.3 Errors and Operating Status ..............................65
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Page 4

Introduction

Introduction
Thank you for purchasing the Hioki FT6380-50 Clamp on Earth Tester. To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future refer­ence.
1
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Page 5

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 authorized Hioki distributor or reseller.
□
FT6380-50 Clamp on Earth Tester
□
Instruction Manual (this manual)
□
Carrying case
□
LR6 Alkaline battery
×2
□
Strap
□
Operating Precautions
(0990A907)
2
Verifying Package Contents
Confirm that these contents are provided.
Accessories
□
Resistance check loop
Ω ±2%, 25 Ω ±1%)
(1
Use the original packing materials when transporting the instrument, if possible. For other transportation notes, refer to the “Transporting” (p.64).
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Page 6

Option (sold separately)

□
Z3210 Wireless Adapter
Option (sold separately)
The option listed below is available for the instrument. To order an option, please contact your authorized Hioki distributor or reseller. Options are subject to change. Check Hioki’s website for the latest information.
3
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Page 7

Safety Information

4
Safety Information
This instrument is designed to conform to IEC 61010 Safety Standards and has been thoroughly tested for safety prior to shipment. in this manual may negate the provided safety features. Care­fully read the following safety notes before using the instrument.
Mishandling instrument could result in bodily injury or even death, as well as damage to the instrument. Familiarize yourself with the instructions and precautions in this manual before use.
Symbols on equipment
However, using the instrument in a way not described
Indicates the need for caution or the presence of a hazard. For more information about locations where this symbol appears on instrument compo­nents, see “Operating Precautions” (p.8), warning messages listed at the beginning of operating instructions, and the document entitled “Operating Precautions” that comes with the instrument.
Indicates a double-insulated device.
Indicates AC (Alternating Current).
Indicates that using the instrument in an external magnetic field of exceeding 30 A/m is prohibited.
Indicates that the instrument may be connected to or disconnected from a live circuit.
Indicates whether the power is on or off.
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Safety Information
The following symbols in this manual indicate the relative impor­tance of cautions and warnings.
Indicates an imminently hazardous situation that, if not avoided, will result in death of or serious injury to the operator.
Indicates a potentially hazardous situation that, if not avoided, could result in death of or seri­ous injury to the operator.
Indicates a potentially hazardous situation that, if not avoided, could result in minor or moder­ate injury to the operator.
Indicates the possibility of equipment damage.
Symbols for Various Standards
Indicates the Waste Electrical and Electronic Equipment Directive (WEEE Directive) in EU member states.
Indicates that dards imposed by EU directives.
the instrument complies with stan-
Other Symbols
Indicates a prohibited action.
5
(p. #)
[ ] Information displayed on the screen is enclosed
Fn
(bold
characters)
Indicates the location of reference information.
in brackets.
Bold text indicates alphanumeric characters shown on operation keys.
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Safety Information
Over-range display
Open display
Resistance measurement: When the read­ing exceeds 1,600 Ω Current measurement: When the reading exceeds 60.0 A.
This screen is displayed when the clamp sensor is not completely closed during use of the resistance measurement function.
6
The screen of this instrument displays characters in the fol­lowing manner.
Screen displays that differ from the above notation:
Symbols for Various Standards
Hioki expresses accuracy as error limit values specified in terms of percentages of reading.
Reading (displayed value)
Refers to the displayed value of the measur­ing instrument. The limit values of reading errors are expressed in percent of reading (% of reading, % rdg).
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Safety Information
Measurement categories
This instrument complies with CAT IV 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.
Primary electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable
CAT II
CAT III
CAT IV
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 CAT-rated in CAT II to CAT IV measurement applications could result in a severe accident, and must be carefully avoided.
tools, household appliances, etc.) CAT II covers directly measuring electrical outlet receptacles.
Primary electrical circuits of heavy equipment (fixed installations) connected directly to the distri­bution panel, and feeders from the distribution panel to outlets.
The circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device (distribution panel).
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Page 11

Operating Precautions

8
Operating Precautions
Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions. Use of the instrument should confirm not only to its specifica­tions, but also to the specifications of all accessories, options, batteries, and other equipment in use.
Preliminary Checks
Before using the instrument for the first time, verify that it oper­ates normally to ensure that no damage occurred during storage or shipping. If you find any damage, contact your authorized Hioki distributor or reseller.
Instrument Installation
Operating temperature: -10°C to 50°C (14°F to 122°F) (Be sure to use batteries that are suited for use under the envi­ronmental conditions in which you are using the instrument.) Operating humidity: 80% RH or less (non condensating)
Avoid the following locations that could cause an accident or damage to the instrument.
Exposed to direct sunlight Exposed to high tem­perature
Exposed to water, oil, other chemicals, or solvents Exposed to high humidity or con­densation
Exposed to high lev­els of particulate dust
In the presence of cor­rosive or explosive gases
Exposed to strong electromagnetic fields Near electromagnetic radiators
Near electromagnetic radiators (e.g., high­frequency induction heating systems and IH cooking utensils)
Subject to vibration
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Operating Precautions
Handling the Instrument
• To avoid short circuits and potentially life-threatening hazards, never attach the clamp to a circuit that operates at more than 600 V AC, or over bare conductors.
• The maximum rated voltage between input terminals and ground is 600 V AC. Measuring a voltage in excess of this rating relative to ground could damage the instrument and result in bodily injury.
• To avoid electric shock, do not remove the instrument's case. The internal components of the instrument carry high voltages and may become very hot during operation.
• When the clamp sensor is opened, do not allow the metal part of the clamp sensor to touch any exposed metal, or to short between two lines, and do not use over bare con­ductors.
To avoid electric shock when measuring live lines, wear appropriate protective gear, such as insulated rubber gloves, boots and a safety helmet.
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Operating Precautions
Frequency [Hz]
Current [A]
10
• Do not input a current in excess of the maximum allowable current. Doing so may damage the instrument or cause burns. The maximum allowable current is 100 A AC continuous or 200 A AC within 2 minutes at 50 Hz/60 Hz. For more informa­tion about the frequency derating characteristics during con­tinuous input, see the following diagram:
• To avoid damage to the instrument, protect it from physical shock when transporting and handling. Be especially careful to avoid physical shock from dropping.
• Be careful to avoid dropping the instrument or otherwise sub­jecting them to mechanical shock, which could damage the mating surfaces of the core and adversely affect measure­ment.
• Although this instrument is dust resistant, it is not completely dust- or waterproof. To prevent possible damage, avoid using in dusty or wet environments.
• Do not slant the instrument or place it on top of an uneven sur­face. Dropping or knocking down the instrument can cause injury or damage to the instrument.
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Operating Precautions
• The protection rating for the enclosure of the instrument (based on EN 60529) is IP40*. (The rating applies to the clamp sensor when in the closed position.)
*: 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 mea-
suring 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.
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Operating Precautions
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1.1 Product Overview

13

Overview Chapter 1

1.1 Product Overview
The FT6380-50 Clamp on Earth Tester makes grounding resis­tance measurements simply by being clamped to multiple­grounded ground wires. No auxiliary grounding rod is needed, and there is no need to disconnect the ground wire from the grounding rod.
The instrument also provides AC current measurement function­ality and can measure currents ranging from leakage current on the order of several mA to load currents of up to 60 A.
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1.2 Features

14
1.2 Features
Compact, low-profile sensor
The compact, low-profile sensor can be used to clamp ground wires with ease. The sensor design dramatically speeds the measurement process by eliminating the need to pull out ground wires for clamping or dig around the ground rod or wire.
Broad dynamic range
The instrument can easily measure grounding resistance of up to
0.02 Ω to 1,600 Ω with its auto-range function. Current measurement ranges from small leakage current (maximum resolution 10 A) to a maximum of 60 A.
Noise check function (p.31)
The instrument automatically detects noise that may affect ground­ing resistance measurement and displays a [ ] mark.
True RMS display
True RMS calculation allows the instrument to accurately measure distortion waveform currents.
Data hold function (p.37)
A large button that is easy to push lets you hold the measured value. The button notifies the user of the hold status by lights up while the value is being held.
Backlight function (p.37)
The instrument uses a white LED for excellent visibility so that dis­play values can be read clearly, even in dark locations.
Auto-power-save (APS) function (p.53)
An auto-power-save function keeps batteries from running down when you forget to turn off the instrument.
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1.2 Features
15
Alarm function (p.39)
By setting a threshold, you can have the instrument make a PASS/ FAIL judgment and notify you of the result with a buzzer. You can set threshold values as you prefer for each resistance and current and choose between two judgment conditions: when the measured value exceeds the threshold (High) and when it falls below the threshold (Low).
Filter function (p.38)
Widespread use of switching power supplies and inverters has led to cases where harmonic components are superimposed on leakage current waveforms. The instrument’s filter function allows it to per­form two types of measurement: leakage current as related to deg­radation of insulation, and leakage current including this harmonic component.
Internal memory (p.42)
The instrument’s internal memory can record up to 2,000 measured values.
Automatic measurement report function using your mobile communication device (p.46)
The wireless communication function enables your mobile commu­nication device to create measurement reports on-site easily.
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Page 19

1.3 Names and Functions of Parts

Barrier
Front
Clamp sensor
Power key
HOLD key (p.37)
A/Ω key
Backlight key (p.37)
Display indicator (p.19)
Operation key (p.18)
16
1.3 Names and Functions of Parts
Power key • Used to turn the instrument on and off.
HOLD key • Holds the measured value display or cancels hold mode.
Backlight key • Turns the backlight on and off.
A/Ω key • Switches between resistance measurement mode and
• To temporarily cancel the auto-power-save function, press the power key while holding down the HOLD key.
• To cancel auto-power-save mode, press the power key while holding down the HOLD key.
current measurement mode.
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Battery cover (p.23)
Back
Strap hole
Bottom
Serial No.
The serial number consists of nine digits. The first two digits indicate the year of manufacture, while the second two digits indicate the month of manufacture. Do not remove this sticker as the number is important.
1.3 Names and Functions of Parts
17
(p.22)
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1.3 Names and Functions of Parts
Operation key
18
Key Description
Switches to function mode, which is used to configure set­tings. Pressing this key again will return to resistance mea­surement mode or current measurement mode. (p.50)
• Enables the alarm function. (p.39)
• When the alarm function is enabled, the instrument will notify the user with the buzzer if a reading is greater than (or less than) a preset threshold.
• Alarm function threshold settings can be configured in func­tion mode. (p.41)
*In function mode, this key serves as the
used to select setting items and values.
• Pressing this key while using the current measurement func­tion enables the low-pass filter to reject unneeded harmonic components. (p.38)
• Pressing it while using the resistance measurement function enables the moving average function, allowing more stable measurement. (p.38)
*In function mode, this key serves as the
used to select setting items and values.
Saves measurement data to the instrument’s internal mem­ory. (p.42)
*In function mode, this key serves as the
used to accept setting items and values.
▼
key, which is
▲
key, which is
OK
key, which is
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Display Indicators
1.3 Names and Functions of Parts
Lights up when data is being held. (p.37)
Lights up in function mode. (p.50) Flashes in subfunction mode. (p.51)
Lights up when the alarm function is on. (p.39)
Lights up when the filter function is on. (p.38)
Lights up when the wireless communication function is on. Flashes when data is being sent or received. (p.46)
Lights up when the auto-power-save function is on. (p.53)
Indicates the remaining battery power. (p.23)
Lights up in AC current measurement mode. (p.33)
Lights up in resistance measurement mode. (p.29)
Lights up in resistance measurement mode when a current that could affect the measured value is detected. (p.31)
Lights up in resistance measurement mode when the mea­sured ground loop has a high reactance component or capac­itance component ( lights up due to a low measured resistance value, it is likely that the displayed value indicates a shorted measurement loop rather than normal grounding resistance. When the [
]
mark lights up, the loop may have a break in it. In this case, the mark indicates that the wires have been coupled by capacitance.) (p.32)
±45°
or greater). (When the [ ] mark
19
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1.3 Names and Functions of Parts
20
Lights up during internal memory operations. (p.42) The number of measurement data points stored in memory is shown to the right.
Lights up when the range display function is on. The measurement range is shown to the right.
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2.1 Measurement process

Measurement

Resistance Measurement (p.29)Current Measurement (p.33)
End of measurement
Remove the instrument from the measurement target.Turn off the instrument.
Measurement Preparations
Pre-Operation Inspection (p.26)Using the included resistance check loop to inspect the
instrument (p.27)
3
2
1
21
Measurement
2.1 Measurement process
Chapter 2
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Page 25

2.2 Preparing for Measurement

22
2.2 Preparing for Measurement
After purchasing the instrument
Complete the following steps before using the instrument to make measurements.
Attaching the Strap
Attach both ends of the Strap securely to the instrument. If insecurely attached, the instrument may fall and be damaged when carrying
Thread the strap through the strap hole as shown in the follow­ing diagram:
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2.2 Preparing for Measurement
23
Installing (or Replacing) the Battery and Wireless Adapter
Before using the instrument for the first time, install two LR6 Alkaline batteries.(p.25) Verify that there is sufficient battery power remaining before measurement. If there is insufficient bat­tery power remaining, replace the batteries.
Battery Status Indicator
This indicator is displayed at the top right corner.?
When new alkaline batteries have been installed
When 2/3 of the battery power remains
When 1/3 of the battery power remains
No battery power remains. Replace with new batteries.
When the Z3210 Wireless Adapter (option) is installed, the wire­less communication function can be used.(p.46)
• To avoid electric shock, disconnect the clamp from the measuring object before removing the battery cover.
• After replacing the batteries or after installing or remov­ing the Z3210, install the battery cover and tighten the screws before use.
• Battery may explode if mistreated. Do not short- circuit, recharge, disassemble or dispose of in fire.
• Handle and dispose of batteries in accordance with local regulations
• To prevent instrument damage or an electric shock, use only the screws that are originally installed for securing the battery cover in place. If you have lost a screw or find that a screw is damaged, please contact your authorized Hioki distributor or reseller.
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2.2 Preparing for Measurement
24
• Do not mix old and new batteries, or different types of batter­ies. Also, be careful to observe battery polarity during installa­tion. Otherwise, poor performance or damage from battery leakage could result.
• To avoid corrosion from battery leakage, remove the batteries from the instrument if it is to be stored for a long time.
• After touching any metallic part, such as a doorknob, to elimi­nate static electricity from your body, connect/disconnect the Z3210. Failure to do so could cause static electricity to dam­age the Z3210.
•
The [ ] indicator lights when battery voltage becomes low. Replace the batteries as soon as possible.
• Before replacing the batteries, make sure to turn off the instrument.
• After use, always turn off the instrument.
• If the battery is completely exhausted, the display will
bAtt → P.oFF
show [ cally turn off.
], and the instrument will automati-
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Installing (replacing) the batteries and wireless adapter
2
3
5
6
7
4
Rear
Prepare the following.
• LR6 Alkaline battery ×2
• Z3210 Wireless Adapter (option)
• Phillips screwdriver
Start the following procedure after reading the safety precau­tions.(p.23)
Disconnect the instrument from the measuring object
1.
and turn off the power.
Loosen the screws and remove the battery cover.
2.
Remove the old batteries (when replacing the batteries).
3.
Install new batteries, taking care to orient them properly.
4.
When installing the wireless adapter, remove the pro-
5.
tective cap.
Insert the wireless adapter all the way inside while
6.
carefully checking its orientation.
Install the battery cover and tighten the screws.
7.
2.2 Preparing for Measurement
25
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Page 29

2.3 Pre-Operation Inspection

Before using the instrument for the first time, verify that it oper­ates normally to ensure that no damage occurred during stor­age or shipping. If you find any damage, contact your authorized Hioki distributor or reseller.
Does the screen turn on when the instrument is turned on?
The batteries may be dead. Replace the batteries and try again.
The instrument may be mal­functioning. Have the instru­ment repaired.
• Is the instrument damaged?
• Is the clamp sensor cracked or otherwise damaged?
No
End of inspection
Yes
An error is displayed.
• The screen is not on.
• The screen shows an error.
Do not use the instrument if it is damaged as doing so may result in electric shock. Have the instrument repaired.
Yes
1. Inspecting the instrument
2. Inspecting the instrument after turning it on
The screen is on.
Using the included resistance check loop to inspect the instru­ment (p.27)
26
2.3 Pre-Operation Inspection
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2.3 Pre-Operation Inspection
Resistance check loop
27
Using the included resistance check loop to inspect the instrument
Before turning on the instrument, be sure to read Operating Pre­cautions (p.8).
Inspecting the instrument with the resistance check loop
Verify that there is no foreign matter lodged between the tips of the clamp sensor and that the sensor can be closed and opened smoothly. If so, clamp the included resistance check loop and verify that the instrument is operating properly. Verify that a value within the allowable range is displayed for each loop.
Test resistance Allowable range
1 Ω
25 Ω
0.95 Ω to 1.05 Ω
24.3 Ω to 25.7 Ω
• If the instrument displays a value outside the allowable range, it needs to be repaired. Contact your authorized Hioki distributor or reseller.
• The resistance check loop cannot be used to calibrate the instrument. To have the instrument calibrated, con­tact your authorized Hioki distributor or reseller.
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2.4 Measurement Procedure

barrier
28
2.4
Measurement Procedure
• To avoid electric shock, do not touch the por­tion beyond the protective barrier during use.
• When the clamp sensor is opened, do not allow the metal part of the clamp sensor to touch any exposed metal, or to short between two lines, and do not use over bare conductors.
• The maximum allowable current is 100 A AC continuous or 200 A AC for 2 minutes (50 Hz/60 Hz). Currents in excess of these values must be avoided as they may dam­age the instrument or cause bodily injury.
• The tips of the clamp sensor are precisely manufac­tured in order to provide a high level of precision. Exer­cise caution when handling the clamp so as to avoid subjecting it to excessive vibration, mechanical shock, or force.
• If foreign matter gets stuck between the tips of the clamp sensor, do not forcibly open or close the sensor, but rather use a soft brush or similar implement to carefully remove the foreign matter. Accurate mea­surements cannot be made while foreign matter is stuck between the tips of the clamp sensor or while the shape of the clamp sensor is deformed. If the tips of the clamp sensor become deformed, have the instru­ment inspected and calibrated by your authorized Hioki distributor or reseller.
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2.4 Measurement Procedure
RmR
x
1
1
R
i
-----
i 1=
n
----------- -
+=
R
x
1
1
R
i
-----
i 1=
n
------------------
«
R
x
R
1
R
n
R
2
29
Resistance Measurement
Measuring Principle
As illustrated below, the instrument is designed to measure grounding resistance at multiple grounding locations. (*For appli­cations involving the measurement of grounding resistance at a single grounding site, use Hioki FT6031-50 Earth Tester or Hioki FT3151 Analog Earth Tester).
If the grounding resistance of the measurement target is repre­sented by grounded locations are represented by tance value measured by the product is as follows:
If n is sufficiently large and each Ri value is sufficiently small,
and the second term can be ignored, allowing the value of
Rx and the grounding resistance values of other
R1,
R2, …,
Rn, the resis-
Rx to be measured.
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2.4 Measurement Procedure
R
x
R
1
R
n
R
x
30
Example with actual measured values
The following provides an example with actual measured values. The more grounding electrodes there are in the multiple­grounded installation, the higher the accuracy of the obtained values. Alternately, if even one grounding electrode has a small value (for example, 1 Ω), accurate values can be approached even if there are few grounding electrodes. Since most multiple­grounded systems have a large number of grounding elec­trodes, the error can be limited.
Measuring method
Select resistance measurement mode.
1.
Select resistance measurement mode with the
Clamp the grounding wire you wish to measure.
2.
The resistance value will be displayed.
A/Ω
key.
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2.4 Measurement Procedure
• Do not measure the same location with two or more Clamp on Earth Testers at the same time. The instru­ments will interfere with each other, preventing accu­rate measurement.
• Verify that the [ ] mark is not lit up.
When the current flowing through the grounding wire is high (approximately 2.5 A or greater with a commercial frequency of 50 Hz/60 Hz, approximately 100 mA or greater with a harmonic component of 1 kHz), the cur­rent will affect measured values, making it impossible to measure the resistance. Check the current flowing through the grounding wire. * The current level at which the [ ] mark lit up
depends on individual differences as well as the fre­quency. The closer to the injected signal frequency, the smaller the noise current that will affect opera­tion.
• Open display
The screen will show [OPEn] if the clamp sensor is not completely closed. Close the clamp sensor completely and repeat the measurement. * If an extremely large current is flowing through the
grounding wire or a DC current is superposed, the screen may display [OPEn] even if the clamp sensor is completely closed. This does not signal a malfunc­tion. Check the current flowing through the grounding wire by using the instrument's current measurement mode or an instrument such as a clamp tester capa­ble of DC current measurement.
31
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2.4 Measurement Procedure
R
x
R
x
R
x
R
1
R
x
R
1
[]
[]
Short
Break
32
• Inductor mark
If the [ ] mark next to the resistance mark light up during measurement, there may be a short in the ground wire. It is recommended to verify that there are no shorts in the location being measured.
• Capacitance mark
If the [ ] mark next to the resistance mark light up during measurement, there may be a break in the ground wire. It is recommended to verify that there are no wiring breaks in the location being measured.
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2.4 Measurement Procedure
33
Current Measurement
Measuring Principle
The instrument is designed based on the principle of electro­magnetic induction. The magnetic field corresponding to the cur­rent flowing through the conductor to be measured is detected by a current transformer that consists of a magnetic core and coil. The current transformer generates the current correspond­ing to the magnetic field. The detection resistor converts this cur­rent into the voltage to calculate the value of the current flowing through the conductor.
Measuring method
Select current measurement mode with the A/Ω key.
1.
Position the conductor in the center of the clamp
2.
sensor.
To perform measurement accurately, place the conduc­tor to pass through the center of the clamp sensor at a right angle.
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2.4 Measurement Procedure
OK NG
34
The current RMS value will be shown on the display.
• Always clamp the instrument around only one conduc­tor. Clamping the instrument around two or more of conductors in a bundle prevents the instrument from measuring any current regardless of whether the mea­surement target is a single-phase or three-phase cir­cuit.
• The frequency of special waveforms such as at the secondary side of an inverter may not be indicated cor­rectly.
• Depending on the magnitude and frequency of the input current, resonances may be heard from the clamp jaw. This does not affect the measurement.
• Do not input a current in excess of the maximum allow­able current for the current range being used.
• Displayed values can frequently fluctuate due to induction potential even when no voltage is applied. This, however, is not a malfunction.
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Page 38
Measuring zero-phase current
Single-phase, 2-lead circuits
three-phase 3-lead circuits
Clamp all three leads of the circuit.
Load device
Load device
lg
When measuring zero-phase current, clamp all of the circuits at once.
2.4 Measurement Procedure
35
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Page 39
2.4 Measurement Procedure
36
Do not input current that exceeds the maximum continu­ous input of the electric current range.
• Measurement may not be accurate in the cases below. (1) When there is large current (of about 100 A) flow-
ing through a nearby electric line
(2) Note that a value of several tens of amperes may
be displayed when opening or closing the clamp sensor, or when changing the electric current range. This is not an error. It may take some time for the display to return to zero. However, starting measurement before the display returns to zero will not affect measurement.
• Enable the “Filter function (Rejecting noise) (p.38)” when conducting measurement in the cases below. (1) When meaningless data is displayed due to noise. (2) When using the instrument to measure special
waveforms, such as those on the secondary side of an inverter
• The instrument may not be able to perform measure­ment in the cases below. (1) When using input current that is 1/10 or less of the
full electric current range
(2) When measuring high frequencies with the filter
function enabled.
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Page 40

2.5 Convenient function

37
2.5 Convenient function
Data hold function (Holding the measured value)
This function holds the measured value and continues to display that value. Press the the measured value will be held. The cancel hold mode, press the will disappear, and the
This function makes the display easier to see in dark locations. Press the The backlight will turn off automatically when there has been no operation for about 2 minutes. To turn off the backlight, press the backlight backlight will turn off.
HOLD
key. The [ ] mark will be displayed, and
HOLD
HOLD
HOLD
key will turn off.
key will lights up. To
key again. The [ ] mark
Backlight function (Making measurements in a dark location)
backlight key ( ). The backlight will turn on.
key ( ) again. The
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Page 41
2.5 Convenient function
38
Filter function (Rejecting noise)
This function allows you to reject unneeded frequency compo­nents such as high-frequency noise.
FILTER
Press the cancel the filter, press the will disappear.
During resistance measurement
Using the filter function when there is a significant amount of variation in measured values during resistance measure­ment will cause the measured values to stabilize.
*Note that noise rejection cannot be used when the [
mark is lit up.
During current measurement
Using the filter function enables a low-pass filter, causing the harmonic component to be eliminated from measured values. Widespread use of switching power supplies and inverters has led to cases where harmonic components are superimposed on current waveforms; the filter function is effective in such cases. Canceling the filter function dis­ables the low-pass filter, allowing measurement of current including harmonic components.
key. The [ ] mark will be displayed. To
FILTER
key again. The [ ] mark
]
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Page 42
2.5 Convenient function
Alarm settings screen for resistance measurement
Alarm settings screen for current measurement
39
Alarm function (Judging measured values and sounding an alarm)
You can sound an alarm using previously set thresholds by pressing the key. A high tone signifies a high alarm, while a low tone signifies a low alarm. Thresholds and other settings must be configured in advance. To cancel the alarm function, press the key again.
Configuring the alarm settings
1.
Press the Fn key to switch to function mode. Using the and ▲ keys, select the resistance or current alarm settings screen and press the
*For more information about function mode, see (p.50).
OK
key.
▼
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Page 43
2.5 Convenient function
Lo: The alarm will sound if the measured value
is less than the set threshold value.
Hi: The alarm will sound if the measured value
is greater than the set threshold value.
*The Hi/Lo setting is saved once the following setting has been
configured. If you press the
Fn
key after configuring the Hi/Lo set­ting but before saving the threshold and thereby cancel the config­uration process, any changes to the Hi/Lo setting will not be saved.
40
Set the alarm type (Hi/Lo).
2.
Using the ▼ and ▲ keys, select the alarm type (Hi/Lo), and press the
OK
key. The next threshold setting will start
flashing.
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Page 44
2.5 Convenient function
Set the threshold.
3.
After configuring the Hi/Lo setting, set the threshold. Using the
OK
You can move more quickly through threshold values by pressing and holding the
Once the settings are complete, the screen will switch to the alarm settings screen. To return to resistance mea­surement or current measurement mode, press the key again or the
key.
▼
and ▲ keys, set the threshold and press the
▼
and ▲ keys.
A/Ω
key.
41
Fn
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Page 45
2.5 Convenient function
Memory number
When the number of values saved in the instrument’s memory reaches 2,000, the display will show “FULL,” and you will not be able to save additional values. Delete unneeded values to free up space.
42
Memory function (Saving measurement data)
Press the current measurement mode. The instrument will beep three times and the displayed measured value will be stored along with the memory number (1 to 2000) in the instrument’s internal memory.
MEM
key in either resistance measurement mode or
* Measured values, filter use, and the [ ] and [ ]
marks are saved in memory.
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Page 46
2.5 Convenient function
Loading a value from the instrument’s internal memory
Press the Fn key to enter function mode.
1.
* For more information about function mode, see (p.50).
Using the ▼ and ▲ keys, select the read memory
2.
screen and press the
Using the ▼ and ▲ keys, increment or decrement the
3.
memory number to recall the measured value for the memory number you wish to load. You can move more quickly through memory numbers by pressing and holding the
OK
key.
▼
and ▲ keys.
43
To exit the read memory screen, press the
OK
key.
* To return to resistance measurement or current mea-
surement mode, press the key.
Fn
key again or the
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Fn
key or the
A/Ω
Page 47
2.5 Convenient function
To clear the last stored data point (1 value) (The screenshot to the left indicates that 34 values have been saved in the instrument’s memory.)
To clear all data points (The screen will show [ALL].)
44
Clearing stored data
You can clear the last stored data point (1 value) or all stored data points.
Press the Fn key to enter function mode.
1.
* For more information about function mode, see (p.50).
Using the ▼ and ▲ keys, select the Clear Memory
2.
screen and press the [CLr].
Using the ▼ and ▲ keys, select either the last stored
3.
data point or all data points and press the
OK
key. The screen will show
OK
key.
The [OK?] mark will flash on the LCD once you select the data to clear so that you can confirm your intentions. Press the
OK
key again to clear the data.
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Page 48
2.5 Convenient function
45
• To cancel, press the
• To return to resistance measurement or current mea­surement mode, press the key.
Fn
key.
Fn
key again or the
A/Ω
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Page 49
2.5 Convenient function
GENNECT Cross Official Website
https://gennect.net/en/cross/index
46
Wireless Communication Function (GENNECT Cross)
When the wireless communications function is enabled, you can review measurement data and create measurement reports on mobile devices. For more information about this functionality, see “GENNECT Cross Official Website” (application software, free of charge).
• The communication distance is approx. 10 m (line of sight).The distance over which data can be sent and received varies greatly depending on whether there are any obstructions between the paired instruments (for example, walls, metal barriers, etc.) and on the dis­tance between the instrument and the floor (or ground). To ensure stable communication, verify ade­quate signal strength.
• Although the GENNECT Cross is provided free of charge, downloading or using the application software may incur Internet connection charges. Such charges are the sole responsibility of the user.
• The GENNECT Cross is not guaranteed to operate on all mobile devices.
• The Z3210 uses 2.4 GHz band wireless technology. It may not be possible for the device to establish a wire­less connection when used in the vicinity of other devices that use the same frequency band, for exam­ple Wi-Fi devices (IEEE 802.11.b/g/n).
• When the app is launched for the first time (before being paired with any instrument), the instrument set­tings screen will be displayed.
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Page 50
2.5 Convenient function
• While the mobile device is displaying the GENNECT Cross's instrument settings screen, simply move it close to the instrument to automatically pair it with the instru­ment (the app can be paired with up to 8 instruments).
• Allow about 5 s to 30 s for the instrument to pair with the app after being turned on. If the instrument fails to pair within 1 min., relaunch GENNECT Cross and cycle the instrument’s power.
Connect the Z3210 Wireless Adapter (option) to the
1.
instrument. (p.23)
2.
Install the GENNECT Cross on your mobile device.
3.
Turn on the instrument.
Press the Fn key to enter function mode.
4.
*
For more information about function mode, see (p.50).
Using the ▼ and ▲ keys, select the wireless communi-
5.
cation setting screen and press the
* When the Z3210 is not connected, the instrument will
display [n.c.]. You cannot switch on/off the wireless communication setting.
OK
key.
47
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2.5 Convenient function
Lights up: Wireless communication function is on. Lights off: Wireless communication function is off. Flashes: Performing wireless communication
mark
48
Using the ▼ and ▲ keys, select [on] and press the
6.
key to enable the wireless communication function.
Launch the GENNECT Cross and pair it with the instru-
7.
ment.
Select the measurement function and start measure-
8.
ment.
OK
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Page 52
2.5 Convenient function
Useful functionality of the Z3210
For detail information, please visit the Z3210’s website. https://z3210.gennect.net
49
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2.5 Convenient function
Current alarm settings (p.39)
Loading values from memory (p.43)
Clearing data from the
instrument’s memory (p.44)
Resistance alarm settings (p.39)
2
3
1
While in function mode, the [ ] mark will light up.
1.
Press the Fn key to enter func­tion mode.
2.
Using the ▼ and ▲ keys, se­lect the desired setting.
3.
Accept the setting with the OK key.
Press the Fn key or the
A/Ω
key
to exit function mode.
Wireless communication
setting (p.46)
50
Function mode
In function mode, the following settings and operations are available:
• Resistance alarm settings • Current alarm settings
• Lo ading values from memory • Clearing data from the instrument’s
• Wireless communication settings
memory
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Page 54

2.6 Advanced Settings and Functions

Press the power key while holding down the
Fn key.
1
2
Advanced settings can be configured in sub-function mode. In sub-function mode, the following settings and operations are available:
• Measurement range display setting (p.52)
• Auto-power-saving (APS) setting (p.53)
• System reset (to revert to factory settings) (p.54)
To enter sub-function mode, turn on the instrument by pressing the power key while holding down the
2.6 Advanced Settings and Functions
Fn
key.
51
To exit sub-function mode, press the power key to turn off the instrument and then turn it back on.
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Page 55
2.6 Advanced Settings and Functions
52
Enabling/disabling the measurement range display function
Press the power key while holding down the Fn key.
1.
The instrument will enter sub-function mode.
Using the ▼ and ▲ keys, select the range display setting
2.
screen and press the
Using the ▼ and ▲ keys, switch the range display function
3.
on or off and press the
The measurement range is displayed using values only. (Example: 1,600 Ω range 1,600) The units for the measurement range are the same as for the displayed measured value.
OK
OK
key.
key.
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Page 56
2.6 Advanced Settings and Functions
The APS function is enabled when the screen shows
[on]
.
53
Enabling/disabling the auto-power-saving (APS) function
The auto-power-saving (APS) function prevents unintentional battery consumption when you forget to turn off the instrument. The APS function activates automatically when the instrument is turned on. The instrument will automatically turn off once about 5 minutes pass without any operation (an alarm will sound for about 10 seconds first). Pressing any key while the alarm sounds will reset the time before the instrument turns off to about 5 minutes. You can restart the instrument by pressing the power key.
Press the power key while holding down the Fn key.
1.
The instrument will enter sub-function mode.
Using the ▼ and ▲ keys, select the APS setting screen
2.
and press the
Using the ▼ and ▲ keys, switch the APS function on or off
3.
and press the When the APS function is disabled in sub-function mode, APS will remain disabled when the instrument’s power is cycled.
OK
OK
key.
key.
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2.6 Advanced Settings and Functions
54
To disable APS temporarily
Turn on the instrument by pressing the power key while holding down the HOLD key to disable APS until the next time the instrument’s power is cycled. The next time the power is cycled, APS will be enabled (as long as the APS setting is enabled in sub-function mode).
Reverting the instrument to factory settings (system reset)
This section describes how to initialize the instrument’s settings. All measurement data (up to 2,000 values) will be deleted.
Press the power key while holding down the Fn key.
1.
The instrument will enter sub-function mode.
Using the ▼ and ▲ keys, select the System Reset screen
2.
and press the
The [OK?] mark will flash.
Press the OK key again.
3.
The instrument will revert to the factory settings.
OK
key.
• If the System Reset screen is displayed by mistake, cycle the instrument's power without pressing the OK key. Instrument operation will be restored without a system reset having been performed.
• For more information about how to clear previously saved measur
ement data, see “Clearing stored data (p.44)”.
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Page 58

3.1 General Specifications

Specifications Chapter 3

3.1 General Specifications
55
Operating environment
Operating tempera ture and humidity range
Storage tempera ture and humidity range
Dustproofness and waterproofness
Standards Safety EN 61010
Power supply LR6 Alkaline battery ×2
Continuous operating time
Dimensions Approx. 73W × 218H × 43D mm (2.87”W × 8.58”H × 1.69”D)
Maximum diameter of measurable conductor
Mass Approx. 620 g (21.9 oz) (excluding batteries)
Product warranty period
Accessories Reference: p.2
Options Reference: p.3
Indoors, pollution degree 2, altitude up to 2000 m (6562 ft.)
-10°C to 50°C (14°F to 122°F), 80% RH or less (non-condensing)
-20°C to 60°C (-4.0°F to 140°F), 80% RH or less (non-condensation)
IP40 (EN 60529) With clamp sensor closed.
EN 61557 (EN 61557-13, Class2, 30 A/m)
EMC EN 61326
Rated supply voltage: 1.5 V DC ×2 Maximum rated power: 450 mVA
When using two LR6 Alkaline batteries (reference value at 23°C)
• Approx. 40 hours (25 Ω measurement, backlight off, Z3210 not installed)
• Approx. 35 hours (25 Ω measurement, backlight off, Z3210 installed and wire­less communication)
(excluding projections)
φ32 mm
3 years
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Page 59

3.2 Input, Output, and Measurement Specifications

56
3.2 Input, Output, and Measurement Specifications
-1. Basic specifications
Measurement item
Input specifications
Maximum rated terminal-to­ground voltage
-2. Measurement specifications/ Accuracy specifications
Common measurement specifications
Accuracy　 guarantee　 conditions
Temperature　 coefficient
Nominal operating ranges
Resistance measurement Current measurement
Resistance range:
0.20 Ω/2.00 Ω/20.00 Ω/50.0 Ω/100.0 Ω/200.0 Ω/400 Ω/600 Ω/ 1200 Ω/1600 Ω
Current range:
20.00 mA/200.0 mA/2.000 A/20.00 A/60.0 A
Range switching: Auto range
600 V AC (Measurement category IV) Anticipated transient overvoltage 8000 V
Accuracy guarantee period: 1 year
(Clamp sensor opening/closing count: Up to 10000 cycles) Accuracy guarantee period after adjustment made by Hioki: 1 year Accuracy guarantee temperature and humidity range:
23°C ±5°C, 80% RH or less
(Measurement accuracy × 0.1)/°C is added to the measurement accuracy (Specified outside a range of 23°C ±5°C)
Operating temperature and humidity range:
See “Operating temperature and humidity range” in “General
Specifications” (p.55). Position (Reference position):
The measurement target must be placed to pass through the
clamp sensor’s center perpendicularly to the clamp sensor. Battery voltage:
Available effective battery voltage 2.3±0.19 V to 3.45 V Earth potential: 3 V rms (Direct current or sinusoidal wave) External magnetic field:
400 A/m or less
(DC and frequency 50 Hz/60 Hz)
30 A/m or less
(AC current measurement only, frequency 15 Hz to 400 Hz
(excluding 50 Hz/60 Hz))
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3.2 Input, Output, and Measurement Specifications
Resistance measurement
Accuracy guarantee conditions
Measurement Method
Effective measuring range
Zero display range
Overrange Greater than 1600 Ω
Injected signal frequency
Injected voltage level
Measurement response time
No reactance component, no noise current, earth potential 0 V
Analog synchronous detection method (effective resistance mea-
surement)
0.02 Ω to 1600 Ω
Less than 0.02 Ω
2375 Hz ±25 Hz
9.0 mV ±1.0 mV rms (with load open)
Filter: OFF: 3 s ±0.5 s or less
Filter: ON: 9 s ±0.5 s or less
57
Range
(Accuracy Range)
0.20 Ω (0.02 Ω to 0.20 Ω) 0.01 Ω ±1.5% rdg±0.02 Ω
2.00 Ω (0.18 Ω to 2.00 Ω) 0.01 Ω ±1.5% rdg±0.02 Ω
20.00 Ω (1.80 Ω to 20.00 Ω) 0.01 Ω ±1.5% rdg±0.05 Ω
50.0 Ω (18.0 Ω to 50.0 Ω)0.1 Ω ±1.5% rdg±0.1 Ω
100.0 Ω (50.0 Ω to 100.0 Ω)0.1 Ω ±1.5% rdg±0.5 Ω
200.0 Ω (100.0 Ω to 200.0 Ω)0.2 Ω ±3.0% rdg±1.0 Ω
400 Ω (180 Ω to 400 Ω)1 Ω ±5% rdg±5 Ω
600 Ω (400 Ω to 600 Ω)2 Ω ±10% rdg±10 Ω
1200 Ω (600 Ω to 1200 Ω)10 Ω ±20% rdg
1600 Ω (1200 Ω to1600 Ω)20 Ω ± 35% rdg
To obtain the measurement accuracy at a range boundary, apply the accuracy of the higher-accuracy range.
Resolution
(Intrinsic uncertainty A)
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Accuracy
Page 61
3.2 Input, Output, and Measurement Specifications
58
Items involved in EN 61557-5
Measurement waveform Sinusoidal wave (with a distortion factor of 5% or less)
Effect of positioning (E1) Accuracy × 2.0
Effect of supply voltage (E2)
Effects of temperature (E3)
Series disturbance voltage (E4)
Fiducial resistance 100 Ω
Allowable ground potential
Effects of resistance of the auxiliary earth electrode s (E5)
Effects of system frequency (E7)
Effects of system voltage (E8)
Operation uncertainty ±30% rdg
Guaranteed operating-uncertainty range
Accuracy × 0.5 and within the accuracy specifications
Accuracy × 1.0 (18°C to 28°C), Accuracy × (1＋0.1/°C) (-10°C to 18°C, 28°C to 50°C)
16 2/3 Hz, 50 Hz, 60 Hz
DC 0 V to 3 V Accuracy × 1.0
400 Hz 0 V to 3 V Accuracy × 1.0
3 V rms (Direct current or sinusoidal wave)
Not applicable
Not applicable
Not applicable
3.00 Ω to 1600 Ω
0 V to 3 V Accuracy × 1.0
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Page 62
3.2 Input, Output, and Measurement Specifications
Input-current frequency [Hz]
Maximum allowable current [A]
AC current measurement
Accuracy guarantee conditions
Measurement method
Crest factor 5.0 or less (for the 60 A range, 1.7 or less)
Conductor position effects
Magnetic field interference
Maximum allowable current
Sine wave input
Digital sampling method (true RMS measurement)
±0.5% rdg or less (using the center of the sensor as the reference,
in all positions)
10 mA or less in an external magnetic field of 400 A/m at 50 Hz /60 Hz
AC
100 A AC continuous, 200 A AC for 2 minutes (50 Hz/60 Hz)
For frequency derating characteristics during continuous input, see
the following diagram:
59
Effective measuring range
Zero display range
Overrange Greater than 60.0 A
Measurement response time
0.05 mA to 60.0 A
Less than 0.05 mA
Filter off/ Filter on: 1 s ±0.5 s or less
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3.2 Input, Output, and Measurement Specifications
60
Range
(Accuracy
Range)
20.00 mA
(1.00 mA to
20.00 mA)
Resolution
0.01 mA
Guaranteed
accuracy
frequency range
45 Hz f 66 Hz
30 Hz f < 45 Hz
66 Hz < f  400 Hz
Accuracy
(Intrinsic uncertainty A)
Filter off Filter on
±2.0% rdg
±0.05 mA
±2.5% rdg
±0.05 mA
±2.0% rdg
±0.05 mA
--
200.0 mA
(18.0 mA to
200.0 mA)
2.000 A
(0.180 A to
2.000 A)
20.00 A
(1.80 A to
20.00 A)
60.0 A
(18.0 A to
60.0 A)
0.1 mA
0.001 A
0.01 A
0.1 A
45 Hz f 66 Hz
30 Hz f < 45 Hz
66 Hz < f 400 Hz
45 Hz f 66 Hz
30 Hz f < 45 Hz
66 Hz < f 400 Hz
45 Hz f 66 Hz
30 Hz f < 45 Hz
66 Hz < f 400 Hz
45 Hz f 66 Hz
30 Hz f < 45 Hz

400 Hz
66 Hz < f
±2.0% rdg
±0.5 mA
±2.5% rdg
±0.5 mA
±2.0% rdg
±0.005 A
±2.5% rdg
±0.005 A
±2.0% rdg
±0.05 A
±2.5% rdg
±0.05 A
±2.0% rdg
±0.5 A
±2.5% rdg
±0.5 A
±2.0% rdg
±0.5 mA
--
±2.0% rdg
±0.005 A
--
±2.0% rdg
±0.05 A
--
±2.0% rdg
±0.5 A
--
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Page 64
3.2 Input, Output, and Measurement Specifications
Items involved in EN 61557-13
Fiducial current 5 mA
Effect of positioning (E1) Accuracy × 0.3
Effect of supply voltage (E2)
Effects of temperature (E3)
Effects of distortion waveform (E9)
Effects of external magnetic field (E11)
Effects of load current (E12)
Effects of common mode voltage (E13)
Effects of frequency (E14)
Reproducibility (E15) Accuracy × 0.3
Operation uncertainty and Guaranteed operating-uncertainty range
Accuracy × 0.3 and within the accuracy specifications
Accuracy × 0.5 (18°C t o 28°C), Accuracy × (1＋0.05/°C) × 0.5 (0°C to 18°C, 28 °C to 45°C)
Accuracy × 0.3
0.15 mA (15 Hz to 400 Hz, in an external magnetic field of 10 A/m)
0.45 mA (15 Hz to 400 Hz, in an external magnetic field of 30 A/m)
0.45 mA (60 A AC, 50 Hz/60 Hz)
0.10 mA
Accuracy × 0.3 (Specified in the accuracy list)
Class 3 10 A/m:
Less than ±15% rdg (measurement current: 5.00 mA to 10.00 mA) Less than ±10% rdg (measurement current: 10.01 mA to 60.0 A)
Class 2 30 A/m:
Less than ±20% rdg (measurement current: 5.00 mA to 10.00 mA) Less than ±12.5% rdg (measurement current: 10.01 mA to 60.0 A)
61
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Page 65

3.3 Function specifications

62
3.3 Function specifications
underline: default value
LCD display Up to 2000 counts
Display refresh rate
Data hold function
Auto-power-save (APS) function
Backlight function
Alarm function
Resistance alarm function
Current alarm function
Alarm Hi/Lo Separate Hi/Lo settings for resistance measurement and current
Alarm threshold setting range
Filter function
Resistance measurement filter function
Current measurement filter function
Memory function
Memory capacity
500 ms (approx. 2 times/s)
Instrument automatically turns off approx. 5 min. after last key operation.
Automatically turns off approx. 2 min. after last key operation.
Resistance measurement mode alarm: Beeps when measured value is less than or greater than threshold.
Current measurement mode alarm: Beeps when measured value is less than or greater than threshold.
measurement Resistance measurement: Hi.AL/Lo.AL Current measurement: Hi.AL/Lo.AL
Resistance measurement: 0.02 Ω to 1600 Ω Resistance measurement initial value: 25.0 Ω Current measurement: 0.05 mA to 200.0 mA, 0.201 A to 60.0 A Current measurement initial value: 1.00 mA
Moving average time: Max. 9 sec.
Cutoff frequency: 180 Hz ±30 Hz (-3 dB)
2000 values
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Page 66

4.1 Cleaning

63

Maintenance and Service Chapter 4

4.1 Cleaning
If foreign matter gets stuck between the tips of the clamp sen­sor, do not forcibly open or close the clamp sensor, but rather use a soft brush or similar implement to carefully remove the foreign matter. Accurate measurements cannot be made while foreign matter is stuck between the tips of the clamp sensor or while the shape of the clamp sensor is deformed. If the tips of the clamp sensor become deformed, have the instrument inspected and calibrated by your dealer.
• Wipe the LCD gently with a soft, dry cloth.
• 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.
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4.2 Troubleshooting

64
4.2 Troubleshooting
Inspection and Repair
If damage is suspected, check the “Before returning for repair” section before contacting your authorized Hioki distributor or reseller.
Transporting
• 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.
• Use the original packing materials when transporting the instrument, if possible.
Before returning for repair
Symptom Cause Remedy
No screen is displayed even when the instru­ment is turned on.
The screen turns off after a little while.
• Are the batteries correctly inserted?
• Is the useful battery life at an end?
• Is the useful battery life at an end?
• Has the APS function been triggered?
Insert the new batteries. (p.23)
(p.53)
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4.3 Errors and Operating Status

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4.3 Errors and Operating Status
If an error is shown on the LCD, the instrument needs to be repaired. Contact your authorized Hioki distributor or reseller.
Display Description Corrective action
Err 001 ROM error
Err 002 Adjustment data error
Err 004 EEPROM R/W error
Err 00 8 Z3210 communication error
APS → P.oFF
bAtt → P.oFF
(Connection failure, a Z3210 or hardware malfunction)
Instrument powered off by APS
Instrument powered off due to supply voltage drop
Repair is required. Please contact your autho­rized Hioki distributor or re­seller.
Take the following actions:
• Reinstall the Z3210.
• Install a different Z3210. (p.23)
If the error persists, you are experiencing a instrument failure. Contact your autho­rized Hioki distributor or re­seller to organize repair.
Cycle the power.
Replace the batteries. (p.23)
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