L2003
HIOKI L2003A981-01
PIN TYPE PROBE
Instruction Manual
Sept. 2020 Revised edition 1
L2003A981-01 20-09H
EN
Inspection/Maintenance
When you receive the product, inspect it carefully to ensure
that no damage occurred during shipping. If damage is
evident, or if it fails to operate according to the specications,
contact your authorized Hioki distributor or reseller.
Preliminary checks
WARNING
Before using the product, ensure that the insulation on
the probes are not damaged and conductors are not
exposed. Using the product in such conditions could
cause an electric shock, so contact your authorized
Hioki distributor or reseller for repair.
Maintenance and service
IMPORTANT
Never use cleaning agents containing benzene, alcohol,
acetone, ether, ketones, thinners or gasoline. These can
deform and discolor the case.
• To clean the product, wipe it gently with a soft cloth moistened with
water or mild detergent.
• If the product seems to be malfunctioning, contact your authorized
Hioki distributor or reseller. Pack the product so that it will not get
damaged during shipping, and include a description of existing
damages. Hioki cannot be responsible for damage that occurs
during shipment.
Disposal
Handle and dispose of the product in accordance with local
regulations.
Operating Precautions
Safety Information
Before using the product, be certain to carefully read the
following safety notes.
WARNING
• Customers are not allowed to modify, disassemble
or repair the instrument. Failure to observe these
precautions may result in re, electric shock, or injury.
• Ensure that the input does not exceed the maximum
input voltage or current to avoid product damage
resulting from heat building. Excessive voltage and
current can cause the product to malfunction.
CAUTION
• Mishandling could result in malfunction of the probe.
Be certain that you understand the instructions and
precautions in the manual before use.
• If persons unfamiliar with electricity measuring product
are to use the product, another person familiar with
such instruments must supervise operations.
Safety symbols
Indicates cautions and hazards. When the symbol is
printed on the product, refer to a corresponding topic
in the Instruction Manual.
Indicates DC (Direct Current).
Notation
In this manual, the risk seriousness and the hazard levels are
classied as follows.
Indicates a potentially hazardous situation that may
WARNING
result in death or serious injury to the operator.
Distance between pins 2.5 mm (0.10″)
Operating temperature
and humidity
Storage temperature
and humidity
Operating environment Indoors, Pollution degree 2, altitude up to
Product warranty
,
period
Accessories Return Cable (400 mm)
Option 9772-90 Tip Pin
Temperature; 0°C to 40°C (32°F to 104°F),
Humidity; 80% RH or less (no condensation)
Temperature; -10°C to 50°C (14°F to 122°F),
Humidity; 80% RH or less (no condensation)
2000 m (6562 ft.)
1 year
Return Cable (550 mm)
Return Cable (800 mm)
Instruction Manual
Part Names
Probe’s maximum rating is 30 V, but be careful to avoid
exceeding the maximum rating of the measuring instrument.
Tip pin
Red (HIGH)
Return
Cable
(550 mm)
Black (LOW)
IMPORTANT
Return Cable (550 mm) is shipped in a state connected to
the instrument.
Mounting holes
Introduction
Thank you for purchasing the HIOKI L2003 Pin Type Probe.
To obtain maximum performance from the product please
read this manual rst, and keep it handy for future reference.
Installing the product in inappropriate locations may cause
the probe to malfunction or lead to accidents. Please do not
install in the following locations. For details on the operating
temperature and humidity, see the specications.
WARNING
• Exposed to direct sunlight or high temperatures
• Exposed to corrosive or combustible gases
• Exposed to strong electromagnetic elds or
electrostatic charges
• Near induction heating systems (such as highfrequency induction heating systems and IH cooking
equipment)
• Susceptible to vibration
• Exposed to water, oil, chemicals, or solvents
• Exposed to high humidity or condensation
• Exposed to high quantities of dust particles
CAUTION
• The ends of the probes are sharp. Be careful to avoid
injury.
• To prevent probe damage, do not step on probes or
pinch them between other objects. Do not bend or pull
on probes at their base.
Indicates a potentially hazardous situation that
may result in minor or moderate injury to the
CAUTION
IMPORTANT
operator or damage to the product or malfunction.
Indicates information related to the operation of
the product or maintenance tasks with which the
operators must be fully familiar.
Indicates a prohibited action.
Indicates actions which must be performed.
Overview
L2003 Pin Type Probe is a four-terminal probe. The probe can be
used to contact various types of batteries since the measuring unit is
pin shaped.
Specifications
Measurable frequency
range
Maximum rated voltage 30 V peak
Maximum rated current 2.5 A peak
Structure Four-terminal pair connection structure
Length Approx. 1500 mm (59.06″)
Mass Approx. 200 g (7.1 oz.)
Cable used 50
Terminal structure Gold plating process
DC to 1050 Hz
Coaxial cable
Ω
Tip shape: Needle
Used tip pin can be replaced.
Accessories
400 mm
Plug
800 mm
Connection Method
IMPORTANT
Clean the tip of the tip pin and the surface of the measuring
object before zero adjustment and measurement.
Connecting to the instrument
1
Adjust
2 3
Turn to the rightInsert
Connecting the return cable
HIOKI L2003A981-01
IMPORTANT
• Connect the return cable before measurement.
• Adjust the xed position of the probe so that the return
cable between the probes does not sag.
Securely insert the plug of the return cable up to
1
the back of the probe (both red and black).
Arrange the probes so that the distance between
2
the pin tips of the probe is the same as that
between the terminals of the actual measuring
object, with the SENSE sides of the probes (both
red and black) facing inwards.
SENSE
Measuring object
Adjust the position of the probes such that the
3
return cable between the probes does not sag, and
x by pushing the return cable into the grooves of
the probes.
When viewed from the front
When viewed from the rear
Use a cable of suitable length for the distance between the
terminals of the measuring object from the three types of
accessory cables.
Return cable length
400 mm 100 mm or less
550 mm
(mounted before shipment)
800 mm 250 mm to 500 mm
Distance between the terminals
of the measuring object
100 mm to 250 mm
Fixing Using the Mounting
Holes
The probe can be xed using the mounting holes. (Please
prepare your own jig or equipment to x.)
Hole diameter: 3.2 mm, use a M3 screw.
Jig or
equipment
to x
M3 screw
12 mm
12 mm + thickness of jig or equipment
9.15 mm
2.5 mm
1.8 mm
φ
First contact
pressure:
Full stroke:
Recommended
stroke:
Approx. 60 g
3 mm±0.2 mm
(condensing pressure
approx. 230 g)
2 mm
(condensing pressure
approx. 170 g)
Zero Adjustment
Execute the zero adjustment using the zero adjustment board
provided with the connected instrument.
Insert the tip pins of the probes into through holes having the
same width as the terminals of the measuring object, and carry
out the zero adjustment with the connected instrument.
L2003
Pin Type
Probe
Zero
adjustment
board
Measuring object
IMPORTANT
• Adjust the return cable between the terminals so that it
does not sag.
• If there is no through hole with the same width as the
terminals of the measuring object, perform zero adjustment
with the most nearest width scale of the through hole as
the terminals.
• Perform zero adjustment by facing the probe’s (both red
and black) SENSE side inwards.
Select through holes having the
same number scale for both
HIGH and LOW terminal.
Through hole
Scale
Replacing the Used Tip Pin
Replace the used tip pin with a new one when the tip pin
breaks or is worn out. To purchase Model 9772-90 Tip Pin
for replacement, contact your authorized Hioki distributor or
reseller.
<Tools to be prepared> Model 9772-90 Tip Pin, pliers, etc.
Turn off the power to the connected instrument and
1
remove the return cables of the probes.
Insert a new tip pin in the socket, and securely
3
push to the back by pressing with a hard board so
that the tip pin does not y out.
Socket
Tip pin
Measure a known measuring object to check if the
4
measured value is correct.
Four-terminal Pair Method
L2003 uses the four-terminal pair method as the measurement
method.
Four-terminal pair method
In the four-terminal pair method, the current ows backward (current
returns) with the same magnitude as the measuring current in the
shields of the SOURCE cables, and then cancels the magnetic eld
of the measuring current. This method suppresses the induced
electromotive force induced at the SENSE terminals, and detects the
voltage actually generated in the object being measured.
Four-terminal pair method when using the optional probe
When the L2003 is used, the four-terminal pair method is structured
as described below. Vicinity of the measurement object will not
entirely be four-terminal pair, and will be affected by an inductive
magnetic eld. The shape of the return cable should not be changed,
and kept away from metals when use. (When there are metals,
inductive magnetic eld occurs due to eddy current, and leads to
measurement errors.)
Shield
SOURCE-H
SENSE-H
Measuring
V
A
• Keep the loop area between the return cable and measurement
object as small as possible.
• Keep the loop shape and wiring position always the same.
• Keep away from metals.
SENSE-L
SOUR CE-L
object
Tip end: SOURCE-H
Tip end: SENSE-H
Return cable
Tip end:
SENSE-L
Tip end:
SOURCE-L
Measuring
object
(The return cable is indicated black in the illustration above.)
Groove
Grip the tip pin to be replaced with pliers and pull it out.
2
When the measurement value uctuates
Keep the return cable in shape, or the affects of the magnetic eld
changes and the measurement value may actuate.
Twist the return cable to keep a xed shape.
(The return cable is indicated black in the illustration.)
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