Contents
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ISO-TECH IDM-610
Safety warnings
Features and layout
Specifications
Pre-use checks and operating notes
Voltage measurement
Resistance measurements
Current measurements
Frequency measurement
Battery replacement
Cleaning, repair and calibration
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
Caution, risk of electric shock

Caution, risk of danger. Refer to operating instructions.

Direct current
Equipment protected throughout by double
insulation or reinforced insulation
Earth
Alternating current



−

Alternating and direct current
Complies with applicable EU directives

The ISO ISO-TECH IDM-610 Digital Multimeter has been
designed to comply with international safety standards. By
using the latest technology, this instrument will give accurate
and reliable results when used in accordance with these
operating instructions.
Digital multimeter with AC/DC clamp sensor
Instruction manual
1 Safety Warnings
 Warning! Electricity can cause severe injuries even with
low voltages or currents. It is extremely important these
instructions are fully read and understood before using this
instrument.
The following symbols or terms may appear on the instrument
or in these instructions:
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TEST EQUIPMENT RISK ASSESSMENT
Users of this equipment and/or their employers are reminded
that Health and Safety Legislation requires them to carry out a
valid risk assessments of all electrical work, so as to identify
potential sources of electrical danger and risk of electrical
injury such as from inadvertent short circuits.
2 Features and layout
● AC and DC current measurement up to 100A using integral
fork-type sensor
● Auto-ranging on voltage, current and resistance ranges
● Frequency measurement function
● Auto-power-save function
● Integral buzzer for continuity checking
● Data-hold and range-hold functions
● LCD with 3400 count and bar-graph
● Protective shock-absorbing holster with probe storage
● Designed to international safety standard IEC61010, overvoltage category CAT.lll, 300V, CAT.ll, 600V, pollution
degree 2.
Note:
Measurement Category (Overvoltage Category) lll is for
measurements performed in the building installation.
Examples are measurements on distribution boards, circuit
breakers, wiring including cables, bus-bars, junction boxes,
socket outlets and permanently connected equipment in the
fixed installation.
AC/DC Clamp Sensor
LCD display
3 Specifications
Measuring ranges and accuracy (at 23℃±5%, relative humidity
75% or less)
Test Lead
Finger
Barrier
1.1 This instrument must only be used by competent and
trained persons and in strict accordance with these
instructions. If this instrument is used in a manner not
specified in these instructions, the protection afforded by
the instrument may be impaired.
1.2 T h i s i n s t r u m e n t m u s t n o t b e u s e d t o m a k e
measurements on circuits where the voltage difference
is greater than 600VAC or DC between conductors, or
300VAC or DC between a conductor and ground.
1.3 Never open the instrument case except for battery
replacement. Disconnect all test leads from the circuit
before opening the case.
1.4 Do not exceed the maximum allowable inputs as given in
the specifications.
1.5 Do not turn the function selector switch whilst the test
leads are connected to a circuit. Select the correct
function before making measurements.
1.6 Examine the instrument and test leads before use for
any sign of abnormality, damage or contamination. If
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Barrier
DC Amps
zero adjust
Current
Range
AC Current A
DC Current A
100A
100A
Measuring
Accuracy
Range
0-100.0A ± 2.0%reading ± 5digits(50/60Hz)
0- ± 100.0A ± 2.0% reading ± 5digits
AC Voltage V Input impedance: 10MΩ
Range
3.4V
34V
340V
600V
Measuring Range
Accuracy
0-600V
(Auto-ranging)
± 1.5%reading
± 5digits(50-400Hz)
any abnormal conditions exist (i.e. broken test leads,
cracked insulation or case, moisture contamination,
display faults or inconsistent readings etc.) do not
use the instrument. Do not attempt to repair a fault or
modify the instrument, but return it for repair. Contact
RS Components for further advice; the address is given
at the end of these instructions.
1.7 Do not attempt to make any measurements with the
current sensor and the test probes at the same time.
Stow the current sensor in the holder before making
voltage or resistance/continuity measurements. Stow
the voltage test probes before making a current
measurement.
1.8 Voltages above 50 Volts are considered hazardous
as they pose a shock hazard. Wear suitable Personal
Protective Equipment if working in the presence of uninsulated conductors carrying voltages greater than 50
Volts.
1.9 Avoid working alone, so assistance may be summoned if
required.
1.10 Keep fingers behind the finger guards on the test
probes and current fork at all times when making
measurements.
1.11 If during testing there is a momentary degradation
of readings or abnormal results, this may be due to
excessive transients or discharges on adjacent circuits
in the local area. If this is suspected, repeat the test to
verify the reading. If in doubt, contact RS Components
for further advice.
4
Frequency Hz
Range
Current
Voltage
Measuring Range
0-3.399kHz
3.4kHz-10kHz
(Auto-ranging)
0-3.399kHz
3.4kHz-33.99kHz
34kHz-300kHz
(Auto-ranging)
Accuracy
± 0.1%reading ± 1digits
± 0.1%reading ± 1digits
340 Ω
± 1.0%reading ± 3digits
3.4k Ω
Buzzer beeps below 30 ± 10 Ω
34k Ω 0-33.99M Ω (Continuity buzzer works on 340 Ω
range only)
340k Ω (Auto-ranging)
3.4M Ω
± 5%reading ± 5digits
34M Ω
± 15%reading ± 5digits
● Electromagnetic For an RF field 1 V/m (IEC 61000-4-3)
compatibility
ACV/DCV/OHMS/FREQUENCY total
a c c u r a c y = s p e c i f i e d a c c u r a c y,
ACA/DCA total accuracy = specified
accuracy +5digits
RF transmitters such as mobile
telephones may not be used in close
proximity
● Safety Standards IEC 61010-1 over-voltage category
CAT.lll, 300V, pollution degree 2
over-voltage category CATll, 600V,
pollution degree 2
IEC 61010-2-031, IEC 61010-2-032, IEC 61326 (EMC)
● Operating System Dual integration
● Display
Liquid crystal display with maximum
reading of 3399,
33 point bar-graph and annunciators.
● Over Input Indication "OL" on the LCD (Ω ranges only)
Selects the next higher range when the
● Auto-ranging
Operation
bar graph increases to 33 points
Selects the next lower range when the
bar graph decreases to 3 points
● Display update time: Numeric reading: about 400ms, bargraph: about 20ms
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side.
The measured voltage value is shown on the display.
When the connections are reversed, "-" appears on the
display in front of the value to indicate the positive lead is
at a lower potential than the negative lead.
5.2 AC voltage measurement
(1) Set the function selector switch to " V."
("AC", "AUTO" and "V" symbols appear at the top of the
display).
(2) Connect the test leads to the circuit under test.
The measured voltage value is shown on the display.
Instrument enters power-save state
about 10 minutes after the last switch
operation
(Current consumption: approx. 10μA
in power-save mode)
● Overload protection AC/DC current ranges:
AC/DC 120 A for 10 seconds
AC/DC voltage ranges:
AC/DC 720V for 10 seconds
Resistance ranges:
AC/DC 720V for 10 seconds
Frequency ranges:
AC/DC 720V for 10 seconds
● Withstand
3700V AC for 1 minute between
voltage
electrical circuit and housing case
10MΩ or greater at 1000V between
● Insulation
resistance
electrical circuit and housing case
● Conductor Size 10mm diameter max.
● Dimensions
128(L)×92(W)×27(D) mm approx.
● Weight:
220g approx.
4 Pre-use checks and operating notes
4.1 Check the battery voltage: Set the function selector
switch to any position other than the OFF position. If the
batteries have sufficient power, the display is clearly
visible and the "BATT" symbol does not appear. If the
display is blank or "BATT" appears, replace the batteries
according to section 9: Battery replacement.
4.2 Examine the instrument and test leads for any sign of
abnormality, damage or contamination. If any abnormal
conditions exist (i.e. broken test leads, cracked insulation
or case, moisture contamination, display faults or
inconsistent readings etc.) do not use the instrument. Do
not attempt to repair a fault or modify the instrument,
but return it for repair. Contact RS Components for
further advice; the address is given at the end of these
instructions.
4.3 Power-save function: When the instrument is turned
on and not used for approximately 10 minutes, the
automatic power-save function turns the instrument off to
conserve battery power. The display will go blank even if
the function selector switch is set to a position other than
the "OFF" position. To turn the instrument on, turn the
function selector switch or press the data-hold button.
Note: A small amount of power is consumed in the powersave state. Ensure the instrument is turned off after use.
4.4 Data-hold function: This is a function to hold a measured
value on the display. Press the data-hold button once
to hold the present reading. In the data-hold state, the
reading is held even if the input varies. The "H" and ""
symbols appear on the display instead of "AUTO" mark.
To exit the data hold state, press the data-hold button
again.
4.5 Range-hold function: When first turned on the instrument
defaults to auto-ranging mode and the "AUTO" symbol
appears on the display. Pressing the range-hold button
enables manual selection of the measurement ranges
and the "" symbol appears on the display instead
of the "AUTO" symbol. Press the range-hold button to
select a higher range. To switch from manual range
selection to auto-ranging, press the range-hold button for
approximately one second, or turn the function selector
switch to another position before setting it back to the
required range.
4.6 For convenience of measurement
in difficult locations, either test
lead probe may be clipped into
the holder as shown in Fig.2.
4.7 The current fork sensor is a
sensitive and delicate device.
H a n d l e i t w i t h c a re a n d d o
not sub j e ct i t t o e xc es si v e
Fig. 2
mechanical shocks or vibrations.
5 Voltage measurement
5.1 DC voltage measurement
(1) Set the function selector switch to the "V " position.
(The "DC " "AUTO" and "mV" symbols appear at the top
of the display).
(2) Connect the red test lead to the positive (+) side of the
circuit under test and the black test lead to the negative (-)
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Note: When the test leads are shorted, the display may read
a small resistance value. This is the resistance of the test
leads.
If there is an open circuit in either of the test leads, "OL" is
shown on the display. On the 340Ω range, "・)))" will appear
on the left side of the display to indicate the continuity buzzer
function is active.
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the circuit to be measured, so the conductor is in the
centre between the arrows (See Fig.2). If the conductor is
not at the centre of the arrows, measurement errors will
occur. The measured value is shown on the display.
Note: Unlike DC current measurement, zero adjustment is
not required. No polarity indication is displayed for AC current
measurement.
8.1 Measuring the frequency of a current:
(1) Set the function selector switch to "Hz." ("AUTO", "k" and
"Hz" appear at the top of the display).
(2) Place the current fork around ONE of the conductors of
the circuit to be measured, so the conductor is in the
centre between the arrows (See Fig.2). The measured
value is shown on the display. If the conductor is not at
the centre of the arrows, measurement errors will occur.
8.2 Measuring frequency of voltage:
(1) Connect the test leads to the circuit under test. The
measured frequency is shown on the display.
Note: The measuring range of current frequency is 0-10kHz
with a minimum measurable input of 10A. The measuring
range of voltage frequency is 0-300kHz with minimum a
measurable input of 10V.
Measurement Category ll (Overvoltage category ll) is for
measurements performed on circuits directly connected
to the fixed installation. Examples are measurements on
household appliances, portable tools and similar equipment.
DC Voltage V Input impedance: 10MΩ
Holster Range Hold Button
Data Hold Button
Digital Multimeter
Function Selector Switch
Battery Voltage Warning
AC/DC
● Current
consumption
● Power-save
function
Range
Buzzer
Manual
Range
Bar Graph
Fig. 1
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Indoor use only, Altitude up to 2000m
● Accessories
23 ℃ ±5 ℃ , relative humidity 75% or
less (no condensation)
● Weight:
● Accessories
0-40 ℃ , relative humidity 85% or less
(without condensation)
-20-60℃ , relative humidity 85% or less
(without condensation)
Tw o 1 . 5 V D C A A A , R 0 3 , o r U M - 4
Alkaline batteries
Approx. 10mA
7 Current measurement
Fig. 3
7.1 DC Current Measurement
(1) Set the function selector switch to the "A" position.
("DC", "AUTO" and “A” symbols appear at the top of
the display.)
(2) Before attempting to make a measurement, turn the "DCA
ZERO ADJ" knob on the side of the current fork of the
multimeter until the display reads zero. Note: If the zero
adjustment is made incorrectly, measurement errors will
result.
(3) Place the current fork around ONE of the conductors of
the circuit to be measured, so the conductor is in the
centre between the arrows (See Fig.2). The measured
value is shown on the display. If the conductor is not at
the centre of the arrows, measurement errors will occur.
Qty. two R03 (UM-4) batteries
Instruction Manual
220g approx.
Qty. two R03 (UM-4) batteries
Instruction Manual
8 Frequency Measurement
 Warning! When measuring frequency, do not attach
the current fork and the test leads to the circuit under
test at the same time.
Note: With the current direction flowing from the top of the
fork (Adjuster side) to the bottom of the fork, the polarity of
the reading is positive (+). Current flowing in the opposite
direction will indicate a negative reading (-).
7.2 AC Current Measurement
(1) Set the function selector switch to " A."("AC ", "AUTO"
and "A" symbols appear at the top of the display).
(2) Place the current fork around ONE of the conductors of
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Measuring Range
Accuracy
0- ± 600V
(Auto-ranging)
± 1.5%reading
± 4digits
Resistance Ω/×・)))
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● Environmental
conditions:
● Temperature
andhumidity ranges
to meet specification:
● Operating
temperature and
humidity range
● Storage
temperature and
humidity range:
● Power source:
Data Hold
Auto Range
Unit
Range
340mV
3.4V
34V
340V
600V
The frequency of either a current or voltage may be
measured, using either the current fork sensor or the voltage
test leads respectively.
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Measuring
Range
Accuracy
9 Battery replacement.
 Warning! Disconnect from the circuit under test and turn
the instrument off before opening the case.
To replace the batteries:
(1) Use a screwdriver to remove the screw from the battery
compartment cover on the rear of the instrument. Remove
the cover. Retain the screw and cover.
(2) Remove the 2 exhausted cells and replace with 2 fresh
cells of the type given in section 4: "Specifications",
observing correct cell polarity. Do not mix old and new
cells.
(3) Refit the battery compartment cover and secure with
the screw. Turn the instrument on and check for correct
operation.
(4) Dispose of the removed cells in accordance with local
regulations.
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6 Resistance measurement
 Wa r n i n g ! D o n o t a t t e m p t t o m a k e re s i s t a n c e
measurements on live circuits.
(1) Set the function selector switch to "Ω/ ・)))" ("AUTO" and
"MΩ" symbols appear at the top of the display).
(2) Check the display shows over-range ("O.L" appears on the
display).
(3) Short the test leads and check that the buzzer sounds and
the display reads zero.
(4) Connect the test leads to the circuit under test. The
measured resistance value is shown on the display. When
the measured value is below approximately 30Ω, the
buzzer will sound.
10 Cleaning, repair and calibration
10.1 To clean the instrument, use a damp cloth moistened
with water and mild detergent. Do not use abrasives,
strong cleaning agents or solvents such as Petrol,
Turpentine or Alcohol, as these may damage the plastic
surfaces. Ensure the instrument is completely dry
before use
10.2 If this instrument requires repair, return it to your
nearest RS Components distributor. Please return
the instrument with all accessories and provide full
details of the fault. For further information, contact RS
Components; the address is given at the end of these
instructions.
10.3 To ensure accurate and reliable operation of this
instrument, calibration should be carried out every 12
months, or more frequently if subject to heavy use or
the instrument is suspected of being inaccurate. For
further information regarding calibration, contact RS
Component; the address is given at the end of these
instructions.
United Kingdom,
RS Components Ltd,
Birchington Road,
Corby, Northants,
NN17 9RS, UK
Tel: +44 (0) 1536 201234
Fax: +44 (0) 1536 405678
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92-1817A
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