RS PRO IDM93N User manual


INSTRUCTION MANUAL
IDM93N DIGITAL MULTIMETER
EN IT DEFR

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IDM 93N
DIGITAL MULTIMETER
INSTRUCTION MANUAL

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WARNING
THE SERVICING INSTRUCTIONS DESCRIBED WITHIN THIS MANUAL ARE FOR USE BY QUALIFIED
PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING OTHER
THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO
DO SO. TO AVOID ELECTRIC SHOCK, DISCONNECT MEASURING TERMINALS BEFORE OPENING
ENCLOSURE.

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INTRODUCTION
1-1 Unpacking and Inspection
Upon removing your new Digital Multimeter from its packing, you should have the following items:
1. Digital Multimeter.
2. Test lead set (one black, one red).
3. Instruction Manual.
4. Protective holster.
1-2 Meter Safety
Terms marked on Equipment
ATTENTION —Refer to Manual.
DOUBLE INSULATION —Protection Class II.
DANGER —Risk of electric shock

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Symbols in this Manual
This symbol indicates where cautionary or other information is found in the manual.
Fuse.
<Battery.
1-3 Front Panel
Refer to Figure 1 and the following numbered steps to familiarize yourself with the meter's front panel controls and
connectors.
1. Digital Display —The digital display has a 3-1/2 digit LCD readout (maximum reading 1999) with automatic
polarity, decimal point, overrange and low battery indicators.
2. Rotary Switch —Selects the desired function and range.
3. COM Input Terminal —Ground input connector.
4. VΩHz Input Terminal —Positive input connector for Volts, Ohms, Diode (Continuity) and Frequency measurements.

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5. µA mA Input Terminal —Positive input connector for current measurements (up to 200mA).
6. 10A Input Terminal —Positive input connector for current measurements (up to 10A).
7. Capacitor Test Input terminals —Used for capacitance measurements.
8. AC/DC Switch —Select AC or DC for voltage and current measurements.

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1
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5
3
4
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Figure 1

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SPECIFICATIONS
2-1 General Specifications
This instrument has been designed in accordance with UL 3111 and IEC publication 1010 Pt 1, Class II, Safety
Requirements for Electrical Equipment for Measurement, Control and Laboratory use. This level of safety can
only be guaranteed while the limits of section 2.2 are observed.
Display : 3-1/2 digit Liquid Crystal Display (LCD) with a maximum reading of 1999.
Polarity Indication : Automatic, positive implied, negative indicated.
Overrange Indication : "1" or "-1".
Low Battery Indication : "<" is displayed when the battery voltage drops below specified operating voltage.
Measuring Rate : 2.5 times per second, nominal.
Auto Power Off : Approx. 30 minutes.
Temperature Coefficient : 0.15 x (Specified accuracy) / °C, < 18°C or > 28°C.
Power Requirements : Alkaline 9V battery.
Battery Life : 150 hours typical (Alkaline).

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Dimensions (WxHxD) : 84mm x 175mm x 31mm, without holster
95mm x 192mm x 50mm, with holster.
Weight (including battery) : 340 gms without holster
550 gms with holster.
Accessories : Protective Holster, battery (installed) and instruction manual.
2-2 Environmental Conditions
Indoor Use
Maximum Altitude : 2000 meters.
Installation Category : IEC 1010 600V CAT. II, 300V CAT. III
Pollution Degree : 2
Operating Ambient : 0°C ~ 30°C ≦80% R.H., 30°C ~ 40°C ≦75% R.H., 40°C ~ 50°C ≦45% R.H.
Storage Temperature : -20°C to 60°C, with battery removed from meter.

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2-3 Electrical Specifications
Accuracy is ± (% reading + number of digits) at 23°C ± 5°C, less than 75% R.H.
(1) DC Volts
Range Resolution Accuracy Over voltage
protection
200mV 100 µV
±(0.5%reading + 1digit) 600V d.c. or 600 V a.c. rms
2V 1mV
20V 10mV
200V 100mV
600V 1V
Input Impedance : 10MΩ.

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(2) AC Volts
Range Resolution Accuracy Over voltage
protection
200mV 100 µV
±(1.3%reading + 4digits)
40Hz to 500Hz 600V d.c. or 600 V a.c. rms
2V 1mV
20V 10mV
200V 100mV
600V 1V
AC Conversion Type : Average Sensing rms indication.
Input Impedance : 10MΩ// less than 100pF

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(3) DC Current
Range Resolution Accuracy Voltage Burden
200 µA 0.1 µA
±(1.0%reading + 1digit)
600mV max.
2mA 1 µA
20mA 10 µA
200mA 100 µA
900mV max.
10A 10mA ±(2.0%reading + 3digits)
Overload Protection : 1A/415V fast blow fuse for mA, µA input.
10A/415V fast blow fuse for 10A input.

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(4) AC Current
Range Resolution Accuracy Voltage Burden
200 µA 0.1 µA
±(1.5%reading + 3digits)
40Hz —500Hz
600mV rms max.
2mA 1 µA
20mA 10 µA
200mA 100 µA
900mV rms max.
10A 10mA ±(2.5%reading + 7digits)
40Hz —500Hz
AC Conversion Type : Average sensing rms indication.
Overload Protection : 1A/415V fast blow for mA, µA input.
10A/415V fast blow for 10A input.

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(5) Resistance
Range Resolution Accuracy Max.Test
Current
Max.Open
Circuit Voltage
200Ω0.1Ω±(0.8%reading + 4digits) 2.5mA 3.2V
2KΩ1Ω
±(0.8%reading + 1digit)
200 µA
0.5V
20KΩ10Ω40 µA
200KΩ100Ω4 µA
2MΩ1KΩ400nA
20MΩ10KΩ±(1.5%reading + 5digits) 40nA
Overload Protection : 600V d.c/a.c max.

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(6) Diode Check
Range Resolution Accuracy Max.Test
Current Max.Open Circuit voltage
;1mV ±(1.5%reading + 5digits) 1.5mA 3.2V
* For 0.4V ~ 0.9V
Overload Protection : 600V d.c./a.c. max.
Continuity : Internal sounder operates when resistance is less than 50Ω.
(7) Auto Power Off
The meter will automatically shut itself off after approximately 30 minutes after power on.
The meter can be turned back on by switching to another range.

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(8) Capacitance
Range Resolution Accuracy Test Frequency
2nF 1pF
40Hz±(2.0%reading + 4digits)
20nF 10pF
200nF 100pF
2 µF 1nF
20 µF 10nF
200 µF 100nF

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(9) Frequency Counter
Range Resolution Accuracy
5Vrms Max Sensitivity Min. Input Frequency
Overload
Protection
2K Hz 1 Hz
±(1.0%reading + 3digits) 200m Vrms
min.
20 Hz
600V d.c. or
600V a.c. rms
20K Hz 10 Hz 200 Hz
200K Hz 100 Hz 20K Hz

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OPERATION
This instrument has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for
Electronic Measuring Apparatus and has been supplied in a safe condition. This instruction manual contains some
information and warnings which have to be followed by the user to ensure safe operation and to retain the instru-
ment in safe condition.
TEST EQUIPMENT RISK ASSESSMENT
Users of this equipment and/or their employers are reminded that health and safety legislation require them to
carry out 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. Where the assessments show that the risk is
significant then the use of fused test leads constructed in accordance with the HSE guidance note GS38
"Electrical Test Equipment for use by Electricians" should be used.

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3-1 Preparation and Caution before Measurement
1. Allow at least 30 seconds after switching on before taking measurements.
2. Remove test leads from the circuit under test, before changing the measurement range.
3. If the meter is used near equipment that generates electro-magnetic interference, the display may be unstable
or indicate incorrect measurement values.
4. Maximum rated voltage to earth for voltage and current measurements terminals is 600V AC/DC CAT II,
300V AC/DC CAT III.
3-2 Voltage Measurements
1. Set the rotary switch to the required position.
2. Set the DC/AC switch to the required position.
3. Connect black test lead to "COM" terminal and red test lead to the "VΩHz" input terminal.
4. Connect test leads to measuring points and read the displayed value.
5. "Warning : Do not exceed 600V d.c. or 600V a.c. limits stated in the specification".