YOKOGAWA 30031A User manual

User’s
Manual
All Rights Reserved. Copyright ©
2008, Yokogawa Meters & Instruments Corporation,
2017, Yokogawa Test & Measurement Corporation
Printed in Japan
Store this manual in an easily
accessible place for quick reference.
Safety Precautions
This product is designed to be used by a person with specialized
knowledge. When operating the instrument, be sure to observe
the cautionary notes given below to ensure correct and safe use
of the instrument. If you use the instrument in any way other than
as instructed in this manual, the instrument’s protective measures
may be impaired. This manual is an essential part of the product;
keep it a safe place for future reference.
YOKOGAWA is by no means liable for any damage resulting from
use of the instrument in contradiction to these cautionary notes.
The following safety symbols are used on the instrument
and in this manual:
Danger! Handle with Care
This symbol indicates that the operator must refer
to an explanation in the instruction manual in order
to avoid the risk of injury or death of personnel or
damage to the instrument.
WARNING
Indicates a hazard that may result in the loss of life or serious
injury of the user unless the described instruction is abided by.
CAUTION
Indicates a hazard that may result in an injury to the user and/or
physical damage to the product or other equipment unless
the described instruction is abided by.
Model 30031A
Leakage Clamp-on Tester
IM 30031A-E
6th Edition:
February 2021 (YMI)
This symbol indicates that this instrument designed to be
applied around or removed from HAZARDOUS LIVE conductors
provided if the RATED circuit-to-earth voltage does not exceed
the value indicated in the measurement category
Double Insulation
This symbol indicates double insulation.
Alternating Current
This symbol indicates alternating current (AC).
Direct Current
This symbol indicates direct current (DC).
Earth TERMINAL
This symbol indicates ground.
■ Strictly observe the following cautionary notes in order to
avoid the risk of injury or death of personnel or damage to
the instrument due to hazards such as electrical shock.
WARNING
• This instrument is a current measuring device (sensor).
Do not use for any other purpose.
• Do not use the instrument if there is a problem with its physical
appearance. (Do not use the instrument if there is any damage
to the casing, battery cover, display and labels or when the
casing is removed.)
• The barrier is there to protect you from touching the conductor.
Be careful not to reach cross the barrier when using the
instrument.
• Disconnect the instrument from the measurable conductors
under test before opening the casing to replace the battery.
• Do not use the product when there are raindrops or droplets of
condensed water on its surface, or if your hands are wet.
• Safety protectors such as rubber-insulated gloves should be
worn to prevent electrical shock when using the instrument.
• Do not use this product in a place where an explosive gas or
vapor is present.
• Do not open the case except when replacing batteries.
Only Yokogawa service personnel are authorized to remove
the casing or disassemble or modify the instrument.
Do not attempt to repair the instrument yourself, as doing so is
extremely dangerous.
When the instrument needs an internal inspection or calibration,
contact Yokogawa or the dealer from whom you purchased the
instrument.
WARNING
The maximum allowed current is 62 Arms and the RATED circuit-
to-earth voltage is 300 Vrms or less.
Do not apply input exceeding this value.
Otherwise, it will not only damage the tester, but also pose a risk
of damage to the human body.
For safety standards, refer to the specications.
CAUTION
The use of this instrument is limited to residential, commercial,
and light-industrial environments.
This instrument may not be able to measure accurately if it is near
other equipment generating strong electromagnetic interference
or a strong magnetic eld caused by large current.
CAUTION
• The jaw section is a delicate, precision sensor.
Do not subject the jaw to unreasonably strong shock, vibration,
or force when using it.
• If dust gets into the tops of the jaws, remove it immediately.
Do not close the jaws when dust is trapped in its joints as
the sensor may break.
CAUTION
• Do not use the instrument near noise-emitting equipment or
where there may be sudden changes in temperature.
Otherwise, the instrument may produce an unstable readings or
errors.
• Do not wipe the instrument using an organic solvent such as
benzine or paint thinner.
Otherwise, the front panel may be damaged or discolored.
When cleaning the instrument, use a dry cloth.
• Do not leave the tester exposed to direct sunlight or in a hot and
humid location such as the inside of a car, for any prolonged
length of time.
• If the instrument will not be used for long periods, remove the
battery.
■ Measurement Category
WARNING
The 30031A is designed for measurement category III.
Do not use the 30031A for measurements in location that fall
under measurement category IV.
Measurement
category Description Remarks
O
(None, Other)
For measurements performed on
circuits not directly connected to
MAINS.
Circuits not connected to
a mains power source.
CAT II
For measurements performed on
circuits directly connected to the
low-voltage installation.
Appliances, portable
equipment, etc.
CAT III For measurements performed in
the building installation.
Distribution board,
circuit breaker, etc.
CAT IV
For measurements performed
at the source of the low-voltage
installation.
Overhead wire,
cable systems, etc.
1. Components
1.1 Display (LCD)
1.2 Main unit (30031A)
1) Jaw Section
Is a precision sensor for detecting currents.
2) Open/Close Lever
Opens and closes the jaws.
3) Display
Shows the measured value (digital reading or bar graph),
unit, function and low-battery symbol ( ).
4) mA/A Selector Switch
Selects the unit of AC current (either “mA” or “A”) to be
measured.
5) Data Hold Switch
Retains the measured data.
If you press this switch, the symbol appears and the data
is retained.
If you press this switch once again, data holding is canceled
(the symbol disappears).
6) Power Switch
Turns on the power to the instrument.
7) Battery Housing (Battery cover)
Contains the battery.
8) Barrier
Prevents contact with the wires.
Thank you for purchasing our Leakage Clamp-on Tester.
Before using this product, thoroughly read this manual
to understand how to use it properly.
Contact information of Yokogawa o󰀩ces worldwide is
provided on the following sheet.
PIM 113-01Z2: Inquiries List of worldwide contacts
Hand strap
2) Open/
close lever
8) Barrier
1) Jaw
section
4) mA/A
selector
switch
3) Display
7) Battery
housing
(cover)
6) Power
switch
5) Data hold
switch
2. AUTO POWER OFF Function
2.1 When the AUTO POWER OFF Function is Used
• AUTO OFF appears.
• The instrument automatically turns o󰀨 10 minutes after
the last switch operation. A buzzer starts to beep 15 seconds
before the automatic power-o󰀨.
• Pressing any switch after the beep restarts the auto power-o󰀨
function.
2.2 When the AUTO POWER OFF Function is not Used
(Cancellation of the AUTO POWER OFF Function)
• Turn o󰀨 the power.
• With the DATA HOLD switch held down, press the POWER
switch for more than 2 seconds to turn on the power.
This causes the buzzer to sound, canceling the AUTO POWER
OFF function (the AUTO OFF display goes o󰀨).
If the instrument is used with the AUTO POWER OFF function
cancelled, take care not to let the battery run down.
2.3 Recovering the AUTO POWER OFF Function
• Turn o󰀨 the power.
• Turn on the power. This enables the AUTO POWER OFF
function to recover. (AUTO OFF appears.)
3. Measuring Instructions
3.1 Before measurement
a) Examine the casing, battery cover, display, and labels of
the instrument for abnormalities.
b) Make sure that the battery cover is rmly closed.
3.2 AC Current Measurement (unit: mA/A)
a) Press the POWER switch to turn on the power.
b) Squeeze the open/close lever to open the jaws.
Insert a wire from the measurable conductors under test
through the jaws, making sure the tops of the jaws are tightly
shut.
c) When the reading stabilizes, read the value.
If you have di󰀩culties in reading the value,
use the DATA HOLD function.
d) When measuring Load Current, press the mA/A switch to
change to A range.
e) When you have nished measurement,
press the POWER switch to turn o󰀨 the tester.
CAUTION
The correct measured values are not displayed if the jaws
do not t precisely. Make sure that they are shut tightly.
3.3 Using the DATA HOLD switch
Pressing the DATA HOLD switch retains the measured data and
displays .
The mA/A selector switch cannot be used in this situation.
The only switches that can be used are the DATA HOLD switch
(to cancel data holding) and the POWER switch.

4. Range Selection
4.1 Range Selection
Switching between the 3 mA and 30 mA ranges and between
the 30 A and 60 A ranges is performed by auto-ranging
(automatic).
For switching between the 3/30 mA and 30/60 A ranges,
the range must be switched using the mA/A selector switch.
4.2 Measurement Ranges
3 mA range
30 mA range
30 A range
0.000 mA
0.010 mA<I
Zero correction
Zero correction
0.00 A
0.05 A<I
I≤2.88 mA
I≥3.270 mA
I≥32.70 mA
Overrange
OL
Range down Range up
I≤28.8 A
I≥32.70 A
Range down Range up
I≥60.6 A62.0 A MAX
Overrange
OL
60 A range
5. Battery Replacement
5.1 Battery Voltage
If the battery runs down and its voltage falls below the operating
voltage (e󰀨ective range), the symbol appears in the LCD
display; promptly replace the battery with a new one.
(Battery: CR2032, 1 piece)
CAUTION
• The specied accuracy is assured when the battery voltage is
in the e󰀨ective range.
If the symbol is displayed, promptly replace the battery.
• If the power does not come on even after pressing the POWER
switch, the battery voltage may have fallen too low.
Replace the battery with a new one.
5.2 Replacing the Battery
CAUTION
• Before replacing the battery, always disconnect the tester from
the measurable conductor under test because there is a risk
of electrical shock. After replacement, close the battery cover
securely and conduct measurements.
• Use the specied lithium battery (CR2032).
To replace the battery:
a) Press the POWER switch to turn o󰀨 the power.
b) urn the battery cover on the backside of the instrument in
the direction of the arrow using a coin, etc.
c) Remove the cover and the battery.
d) Insert a new battery, making sure that the polarities are
correct.
e) Close the cover back in place by turning it in the reverse
direction of the arrow.
Battery cover
Inserting a Battery
Close the battery cover,
aligning the arrow's tail with
the dot and then turn clockwise.
Insert the battery being careful
that the polarities are correct.
Closing the Battery Cover
6. Examples of Measurement
6.1 Examples of Leakage Current Measurement
(3)(1)
Load Load
Single-phase
Two-wire Circuit
Grounding Wire
(2)
Single-phase Three-wire or
Three-phase Three-wire Circuit
Load
6.2 Example of Load Current Measurement
Insert only one of the wires through the jaws.
Load
7. Specications (30031A)
7.1 Specications (Accuracy)
Condition:
Temperature and humidity: 23 ˚C ±5 ˚C, 80% RH or less
Frequency: 50 Hz ±1.0 Hz, 60 Hz ±1.0 Hz
Battery voltage: Within the e󰀨ective range
AC current measurement
Accuracy: ± (% of reading + digits)
Range Resolution Accuracy Maximum
Allowable Current
3 mA 0.001 mA 0.010 < I ≤ 32.70 mA:
1.0%+5
3.270 mA
30 mA 0.01 mA 32.70 mA
30 A 0.01 A 0.05 < I ≤ 50.0 A: 1.0% +5 32.70 A
60 A 0.1 A 50.0 < I ≤ 60.6 A: 5.0% +5 60.6 A
Zero correction
3 mA range: Displays 0.000 mA (zero) when 0.010 mA < I
30 A range: Displays 0.00 A (zero) when 0.05 A < I
IM 30031A-E <P2>
7.2 General Specications
• Method: Mean-value detection and rms-value calibration
• Display (LCD): Digital reading............... 3200 counts
Bar graph...................... 32 segments
“OL” over-range indication
low-battery symbol
data hold symbol
“AUTO OFF” auto power o󰀨 indication
• Sampling: Digital reading............... 2 times/sec
Bar graph...................... 12 times/sec
• Range: 3 mA, 30 mA, 30 A, 60 A
• Range selection:
Automatic (between 3 mA and 30 mA ranges and between
30 A and 60 A ranges)
Manual (between 3 mA and 30 mA ranges and between
30 A and 60 A ranges)
• Additional functions: Data hold and Auto power-o󰀨
• Operating temperature and humidity range:
0 to 50°C, with a maximum humidity of 80% RH or less
(no condensation)
• Storage temperature and humidity range:
-20 to 60°C, with humidity range is 20 to 70%RH
(no condensation)
• Temperature coe󰀩cient:
The following values must be added in the temperature
range of either 0 to 18°C or 28 to 50°C.
0 ≤ I ≤ 50.0A: ± (0.08% of reading/˚C + 0.5 digits/˚C)
50.0 < I ≤ 60.6A: ± (0.3% of reading/˚C + 0.5 digits/˚C)
• E󰀨ect of external magnetic elds: 0.0005% typical value
(in terms of the magnitude of current in adjacent wires)
• Diameter of measurable conductors: 40 mm (Maximum)
• The RATED circuit-to-earth voltage: 300 Vrms or less
•
Maximum allowed current: 62 Arms
• Withstanding voltage: 3.7 kV AC for one minute
(Tested between the cores of the jaw section and the case)
• Power consumption: 6 mW maximum
• Automatic power-o󰀨:
Automatically turns of the power about 10 minutes
after the last switch operation.
(The alarm buzzer begins beeping 15 seconds
before power-o󰀨.)
• Power supply: CR2032 lithium battery (cell) .............1
• Battery life: Approx. 90 hours (of continuous operation)
• Dimensions: Approx. 70 (W) x 178 (H) x 25 (D) mm
(excluding protrusions)
• Weight: Approx. 200 g (including the battery)
• Accessories: Battery (housed in the instrument).....1
RB057 soft carrying case...................1
User’s manual
Safety standards:
EN 61010-1, EN 61010-2-032
Measurement category III
(The RATED circuit-to-earth voltage: 300 Vrms AC)
Indoor use, 2000 m max. above sea level,
pollution degree 2
EMC standards:
EN 61326-1 Class B, EN 61326-2-2
EMC Regulatory Arrangement in Australia and
New Zealand
EN 55011 Class B Group 1
Korea Electromagnetic Conformity Standard
 （한국전자파적합성기준）
Environmental standards: EU RoHS Directive compliant
8. Regulations and Sales in Various Countries and Regions
8.1 Disposing of the Product
Waste Electrical and Electronic Equipment (WEEE), Directive
(This directive is valid only in the EU.)
This product complies with the WEEE directive
marking requirement.
This marking indicates that you must not discard
this electrical/electronic product in domestic
household waste.
Product Category
With reference to the equipment types in the WEEE directive,
this product is classied as a “Monitoring and control instruments”
product.
When disposing products in the EU, contact your local Yokogawa
o󰀩ce in Europe.
Do not dispose in domestic household waste.
8.2 How to Replace and Dispose the Batteries
EU Battery Directive
(This directive is valid only in the EU.)
Batteries are included in this product.
When you remove batteries from this product and dispose them,
discard them in accordance with domestic law concerning
disposal.
Take a right action on waste batteries, because the collection
system in the EU on waste batteries are regulated.
Battery type: Lithium battery (cell)
Notice:
This marking indicates they shall be sorted out and
collected as ordained in the EU battery directive.
How to remove batteries safely:
For further details, see “5.2 Replacing the Battery.”
8.3 Authorized Representative in the EEA
Yokogawa Europe B.V. is the authorized representative of
Yokogawa Test & Measurement Corporation for this product in
the EEA. (EEA: European Economic Area)
To contact Yokogawa Europe B.V., see the separate list of
worldwide contacts, PIM 113-01Z2.
8.4 Disposal
When disposing of this instrument, follow the laws and ordinances
of the country or region where the product will be disposed of.
If you are disposing of the product in the EU, see also section 8.1,
“Disposing of the Product.”