Iso-Tech IDM 98-III, IDM 99-III Instruction Manual

IDM 99-III

Instruction Manual

IDM 98-III & IDM 99-III

Digital Multimeters

Africa

Iso-Tech
1 & 2 Indianapolis Street
Kyalami Business Park
Kyalami, Midrand, South Africa

Asia

Iso-Tech
460 Alexandra Road, #15-01A
PSA Building
Singapore 119963

Europe

Iso-Tech
PO Box 99
Corby
Northamptonshire
NN17 9RS
United Kingdom

Japan

Iso-Tech
West Tower (12th Floor)
Yokohama Business Park
134 Godocho, Hodogaya
Yokohama, Kanagawa 240-0005 Japan

USA

Iso-Tech
7410 Pebble Drive
Fort Worth
Texas 76118-6961

Canada

Iso-Tech
1701 Woodward Drive
Ste 108 Ottawa
Ontario K2C 0R4, Canada

South America

Iso-Tech
Av. Pdte. Eduardo Frei M. 6001-71
Centro Empresas El Cortijo
Conchali, Santiago, Chile

IDM 98III / 99III English IDM 98III / 99III English

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SECTION 1 –SAFETY INFORMATION

Safety Information

Understand and follow operating instructions carefully.

Use the instrument only as specied in this manual; otherwise, the

protection provided by the instrument may be impaired.

WARNING

Identies hazardous conditions and actions that could cause BODILY
HARM or DEATH

CAUTION

Identies conditions and actions that could DAMAGE the instrument or

equipment under test

WARNING

- Examine the instrument and probes before use. Do not use the
instrument if it is wet or damaged

- When using test leads or probes, keep your ngers behind the nger
guards.

- Remove the test lead from the instrument before opening the battery
cover or instrument case.

- Always use the correct terminals, switch position and range for
measurements.

- Never attempt a voltage measurement with the test leads inserted into
the “A”input terminals.

- Verify the instrument is operating correctly by measuring a known
voltage before use. If in doubt, have the instrument serviced.

- Do not apply more than the rated voltage, as marked on the
instrument, between terminals or between any terminal and earth
ground.

- Do not attempt a current measurement when the open-circuit voltage
is above the fuse protection rating.

- Only replace a fuse with the correct type and rating as specied in this
instruction manual.

- Use caution when measuring voltages above 30 Vac rms, 42 Vac

peak or 60 Vdc. These voltages pose a shock hazard.

- To avoid false readings that can lead to electric shock, replace the
battery as soon as the low battery indicator appears in the display.

- Disconnect the circuit power and discharge all high-voltage capacitors
before making resistance, current, continuity, diode or capacitance
measurements.

- Do not use the instrument in a hazardous area or around explosive
gasses or vapours.

- Wear suitable personal protective equipment when working around or

near hazardous live conductors which could be accessible.

Risk of electric shock

See instruction manual

DC measurement

Equipment protected by double or reinforced Insulation

Battery

Fuse

Earth

AC measurement

Conforms to EU directives

Dispose of in accordance with local regulations.

CAUTION

• Disconnect the test leads from the test points before changing the
position of the function rotary switch.

•

Never connect a source of voltage with the function rotary switch in

the

“Ω”, “

”, “°C” , “mA”, or “A” position.

•

Do not expose the instrument to extremes in temperature or high

humidity.

•

Never set the instrument in the “Ω”, “ ”, “°C” , “mA”, or “A” position

to measure
the voltage of a circuit, this could result in damage the instrument and
the
equipment under test.

• If possible, do not work alone, so assistance can be given if required

The following symbols may appear on the instrument
and this instruction manual:

Unsafe Voltage

To alert you to the presence of a potentially hazardous voltage, when the

instrument detects a voltage ≧30 V or a voltage overload (OL) in V, mV .
The

symbol is displayed.

Maintenance

Do not attempt to repair this instrument. It contains no user-serviceable parts.

Repair or servicing should only be performed by qualied personnel. This

instrument should be calibrated yearly, or more frequently if used in harsh
conditions or if it is suspected of being inaccurate.

IDM 98III / 99III English IDM 98III / 99III English

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Cleaning

Periodically wipe the case with a dry cloth and detergent.
Do not use abrasives or solvents.

SECTION 2 - METER DESCRIPTION

Instrument Description

Front Panel Illustration

1. LCD display : 6000 counts

2. Push-buttons.

3. Rotary switch for turn the Power On / Off and select the function.

4. Input terminal for “A” (current measurement)

5. Input terminal for “V”, “Ω”, “ ”, Hz, and °C functions.

6. Common (ground reference) input terminal.

7. Input terminal for mA current measurement.

Features

• 6000 count digital display.

• 62 segment bar graph .

• Extra large scale white backlit display

• True RMS

• 0.08% basic DCV accuracy

• Automatic AC/DC Voltage detect with low impedance (Auto-V LoZ)

• VoltSense (Non-contact voltage detection)

• Smart Data Hold

• Peak Hold (1ms) (IDM99-III only)

• Min/ Max function

• AC+DC function

• Frequency counter on AC mode

• Capacitance measurement

• Temperature measurement (IDM99-III only)

• Low battery indicator with segments

• Auto Power Off (20 minutes)

• Shock proof from 4 feet drop

• CAT IV 600V/CAT III 1000V Safety standard

Unpacking and Inspection

Upon removing the instrument from its packaging you should have the
following items.

1. IDM98-III or IDM99-III digital multimeter.

2. Test leads set (one black, one red)

3. Temperature probe (IDM99-III only)

4. User manual

5. Protective holster

6. Battery (installed)

SECTION 3 – MEASUREMENTS

Preparation and caution before measurement

Observe all warnings and cautions

When connecting the test leads to the device under test connect

the common test lead before connecting the live test lead ; when

removing the test leads remove the test live lead before removing the
common test lead.

The gures on the following pages show how to make basic

measurements.

IDM 98III / 99III English IDM 98III / 99III English

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Measuring AC / DC Voltage

Rotate the switch and press the Function button to select the
measuring function.

See “Using the Function Buttons”

Measuring AC/DC Current

Rotate the switch and press the Function button to select the
measuring function.
See “Using the Function Buttons”

Measuring Frequency

Rotate the switch and press the Function button to select the
measuring function.

See “Using the Function Buttons”

Measuring Resistance/Capacitance

Rotate the switch and press the Function button to select the
measuring function.
See “Using the Function Buttons”

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Measuring Continuity / Diode

Rotate the switch and press the Function button to select the
measuring function.
See “Using the Function Buttons”

Measuring Temperature °C / °F (for IDM99-III only)

Rotate the switch and press the Function button to select the measuring
function.
See “Using the Function Buttons” (°C / °F)

IDM 98III / 99III English IDM 98III / 99III English

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Using The Function Buttons

Function Button

Press the Function button to change the function on the same
switch position.

RANGE Button

Auto Range Mode Manual Range Mode

MIN/MAX Button

The MAX/MIN mode records the min. and max. input values. When the input
goes below the recorded min. value or above the recorded max. value, the
meter records the new value . Press “HOLD” button to pause the recording.

Peak HOLD (for IDM99-III only)

In the Peak HOLD function, the meter records the peak min. value and the

peak max. value; when the inputs goes below the recorded peak min. value or

above the recorded peak max. value ,the meter records the new value . Press
“HOLD” button to pause the recording.

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Smart HOLD

The meter will beep continuously and the display will ash if the measured

signal is larger than the display reading by 50 counts.
Smart Hold will not be activated if the hold value is not scrolled over 50
counts when measuring AC or DC Voltage /Current with Auto-V(LoZ)
Range.

VoltSense

Press and hold down the “VoltSense” button down to activate the
VoltSense function.

CAUTION

The number of dashes displayed indicates the electric eld strength.

Be aware, if no indication, voltage could still be present

Backlight

Press the Backlight button to turn the backlight on/off.

Disable Auto Power Off

Reactivate the instrument by rotating the switch or by pressing any button.

IDM 98III / 99III English IDM 98III / 99III English

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Auto Power Off Disable

Rotate the switch to the “OFF” position, Press and hold down the
Function button and turn the instrument on.

Testing the LCD Display

Rotate the switch to the “OFF” position, Press and hold down the Smart­HOLD button and turn the instrument on.

SECTION 4 – BATTERY AND FUSE REPLACEMENT

Fuse Replacement

Caution

Use only fuses with the following fuse rating:

440mA,1000V IR 10KA Fast acting fuse (size 35 x 10mm)

DMM-B-44/100 – 10,000A, 1000 VAC, unity power factor and
10,000A, 1000 VDC with time constant of 2.2ms

11A, 1000V IR 20KA Fast acting fuse (size 38 x 10mm)

DMM-B-11A – 20,000A, 1000 VAC, power factor ≦ 0.2; 20,000A,
1000 VDC, time constant ≧ 10ms. (size 38 x 10mm)

CAUTION

The following safety information must be observed to ensure maximum personal
safety during the operation of this instrument.

1.

To avoid electric shock, disconnect the test leads before replacing the instrument
fuses or batteries.

2.

When replacing the instrument batteries, do not mix batteries of different types
or old and new batteries.

3. Check the battery polarity carefully when inserting the batteries.

4.

Do not short-circuit used batteries, disassemble them, or throw them in a re.

Doing so may cause the batteries to explode.

5. Dispose of the used batteries in accordance with local regulations.

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Low battery and Battery Replacement

Replace the battery as soon as the low battery indicator appears to avoid
false reading.

Refer to the following gure to replace the batteries

SECTION 5 - SPECIFICATIONS

General Specications

Maximum voltage applied to any terminal : 1000 Vac rms or 1000 Vdc.
rms

Display : 6000 counts.
Polarity Indication : Automatic, positive implied, negative indicated.
Overrange Indication : OL
Batteries Life : 150hours alkaline battery (No backlight)

Low Batteries Indication : Voltage drops below operating voltage, “

”

will ash.

Power Requirement : PP3 9V battery
Auto Power Off : 20 minutes.
Operating Temperature : -10 ~10°C

10°C ~ 30°C (≦80% RH),
30°C ~ 40°C (≦75% RH),
40°C ~ 50°C (≦45%RH)
Storage Temperature : -20°C to 60°C , 0 to 80% R.H. (batteries not

tted)

Temperature Coefcient : 0.15 x (Spec.Accy) / °C, < 18°C or > 28°C .

Measure : Samples 3 times per second .
Altitude : 6561.7 ft (2000m)
Safety : Complies with EN61010-1, UL61010-1,IEC 61010-1, CAT IV

600V, CAT III 1000V

Measurement

Category

Application

I

Measurements on circuits not directly connected
to mains. Examples include: Measurements on battery
powered equipment and specially protected (internal)
mains-derived circuits.

II

Measurements on circuits directly connected to the
low voltage installation. Examples include: Household
appliances, portable tools and similar equipment.

III

Measurements performed in the building installation.
Examples include measurements on distribution
boards, junction boxes, socket-outlets and wiring and

cables in the xed installation.

IV

Measurements performed at the source of the low­voltage installation. Examples include measurements
on primary overcurrent protection devices and
electricity Instruments

Weight : 460g (including battery)
Dimensions (W x H x D) : 94mm x190mm x 48mm with holster.
Pollution degree : 2
EMC : EN 61326-1
Shock vibration : Sinusoidal vibration per MIL-PRF- 28800F

(5 ~ 55 Hz, 3g max.)

Drop Protection : 4 feet drop to hardwood on concrete oor.
Indoor use only.

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Electrical Specications

Accuracy is ±(% reading + number of digits) at 23°C ± 5°C < 80%RH.

(1) Voltage

Input Protection : 1000VDC or 1000VAC rms
AC Frequency Response : 50Hz ~ 1KHz
Input Impedance : 10MΩ, <100pF
AC Conversion Type :

AC conversions are ac-coupled, true rms responding, calibrated to the
sine wave input.
For non-sine wave add the following Crest Factor corrections:
For Crest Factor of 1.4 to 2.0, add 1.0% to accuracy.
For Crest Factor of 2.0 to 2.5, add 2.5% to accuracy.
For Crest Factor of 2.5 to 3.0, add 4.0% to accuracy.

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

60.00mV

DC

0.01mV – ± (0.08% + 10d)

600.0mV

DC

0.1mV ± (0.1% + 2d) ± (0.08% + 2d)

6.000V

DC

0.001V ± (0.09% + 2d) ± (0.08% + 2d)

60.00V

DC

0.01V ± (0.09% + 2d) ± (0.08% + 2d)

600.0V

DC

0.1V ± (0.09% + 2d) ± (0.08% + 2d)

1000V

DC

1V ± (0.09% + 2d) ± (0.08% + 2d)

60.00mV

AC

0.01mV – ± (1.20% + 5d)

600.0mV

AC

0.1mV ± (1.5% + 5d) ± (1.20% + 5d)

6.000V

AC

0.001V ± (1.0% + 3d) ± (0.80% + 5d)

60.00V

AC

0.01V ± (1.0% + 3d) ± (0.80% + 5d)

600.0V

AC

0.1V ± (1.0% + 3d) ± (0.80% + 5d)

1000V

AC

1V ± (1.0% + 3d) ± (0.80% + 5d)

(2) Auto-V

Input Protection : 1000V

DC

or 1000VAC rms

AC Frequency Response : 50Hz ~ 1KHz
Input Impedance : Approx. 3kΩ.
AC Conversion Type :

Conversion type and additional specication are same as voltage

function.

(3) Current

Input Protection : Protected by high energy fuses.

440mA, 1000V AC/DC 10KA Fast acting fuse for mA input. 11A, 1000V
AC/DC 20KA Fast acting fuse for A input

Max. Measuring T

ime : 3 minutes for “A” input, 10 minutes for “mA”

input.
Rest time 20 minutes min.

AC Conversion Type : Conversion type and additional specication are

same
as voltage function.

AC Frequency Response : 50Hz ~ 1KHz

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

600.0V

DC

0.1V

± (1.0% + 3d) ± (0.80% + 3d)

1000V

DC

1V

600.0V

AC

0.1V

1000V

AC

1V

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

60.00mA

DC

0.01mA ± (1.0% + 3d) ± (0.8% + 3d)

600.0mA

DC

0.1mA ± (1.0% + 3d) ± (0.8% + 3d)

6.000A

DC

0.001A ± (1.0% + 3d) ± (0.8% + 3d)

10.00A

DC

0.01A ± (1.0% + 3d) ± (0.8% + 3d)

60.00mA

AC

0.01mA ± (1.5% + 3d) ± (1.2% + 3d)

600.0mA

AC

0.1mA ± (1.5% + 3d) ± (1.2% + 3d)

6.000A

AC

0.001A ± (1.5% + 3d) ± (1.2% + 3d)

10.00A

AC

0.01A ± (1.5% + 3d) ± (1.2% + 3d)

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(4) Peak HOLD (For IDM99-III only)

Specied accuracy ±150d.

(5) Resistance

Input Protection : 1000VDC or 1000VAC rms
Max. Open Circuit Voltage :

Approx. 2.5V for 600Ω & 6kΩ Range.

Approx. 0.6V for others.

Max. Test Current

: Approximately 0.1mA.

* There is a little rolling less than ±50 digits when measuring ＞ 10.00MΩ.

(6) Continuity Check

Input Protection : 1000VDC or 1000VAC rms
Max. Open Circuit Voltage : Approx. 2.5V
Max. Test Current : Approx. 0.1mA
Continuity Threshold : ＜30Ω Beep On.

＞100Ω Beep OFF.

Continuity Indicator : 2.7kHz Tone Buzzer

IDM98-III/IDM99-III

Range Resolution Accuracy

600.0Ω 0.1Ω ± (0.8% + 5d)

6.000KΩ 0.001KΩ

± (0.8% + 2d)

60.00KΩ 0.01KΩ

600.0KΩ 0.1KΩ

6.000MΩ 0.001MΩ

40.00MΩ* 0.01MΩ ± (1.0% + 5d)

IDM98-III/IDM99-III

Range Resolution Accuracy

600.0Ω 0.1Ω ± (0.8% + 5d)

(7) Diode Test

Input Protection : 1000V

DC

or 1000VAC rms

Max. Open Circuit Voltage : Approximately. 2.5V
Max.Test Current : Approximately 0.4mA

(8) Capacitance

Input Protection : 1000V

DC

or 1000VAC rms

Max. Measuring Time : 0.7 sec for 1nF~1mF

3 sec for 1mF~10mF

(9) Frequency Counter

Input Protection : 1000V

DC

or 1000VAC rms

Min. Frequency : 1Hz
Sensitivity :

> 5.0Vp-p (for ACV 1Hz ~ 10kHz).

> 10Vp-p (for ACV 10kHz ~ 100kHz).

＞2mAp-p (for AC mA).
＞0.2Ap-p (for ACA).

IDM98-III/IDM99-III

Range Resolution Accuracy

2.000V 1mV ± (1.5% + 2d)

IDM98-III/IDM99-III

Range Resolution Accuracy

1.000µF 0.001µF

± (1.2% + 2d)

10.00µF 0.01µF

100.0µF 0.1µF

1.000mF 0.001mF

10.00mF 0.01mF

IDM98-III/IDM99-III

Range Resolution Accuracy

100.00Hz 0.01Hz

± (0.1% + 2d)

1000.0Hz 0.1Hz

10.000KHz 0.001KHz

100.00KHz 0.01KHz

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(10) Temperature (For IDM99-III only)

Input Protection : 1000V

DC

or 1000VAC rms

* Does not include accuracy of the thermocouple probe.

* Accuracy specication assumes surrounding temperature stable to

± 1°C. For surrounding temperature changes of ± 5°C, rated accuracy
applies after 2 hours.

(11) AC+DC Voltage

Note: When measuring AC+DC, the AC signal may contain a DC level,

the AC+DC True RMS value might not be accurate if the peak voltage of
AC+DC value is over full scale.

Additional specication are same as voltage function.

(12) AC+DC mV

Additional specication are same as voltage function.

IDM99-III

Range Resolution Accuracy

-40.0°C ~ 400°C 0.1°C ± (1.0% + 10d)

-40.0°F ~ 752°F 0.1°F ± (1.0% + 18d)

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

6.000V 0.001V

± (2.5% + 5d) ± (2% + 5d)

60.00V 0.01V

600.0V 0.1V

1000V 1V

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

60.00mV 0.01mV –
± (2% + 10d)

600.0mV 0.1mV ± (2.5% + 5d)

(13) AC+DC mA

Additional specication are same as voltage function.

(14) AC+DC A

Additional specication are same as voltage function.

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

60.00mA 0.01mA
± (2.5% + 5d) ± (2% + 10d)

600.0mA 0.1mA

IDM98-III/IDM99-III

Range Resolution IDM98-III Accuracy IDM99-III Accuracy

6.000A 0.001A
± (2.5% + 5d) ± (2% + 5d)

10.00A 0.01A