Clarke CDM 10C, 4501140 User guide

DIGITAL MULTIMETER

MODEL NO: CDM10C

PART NO: 4501140

OPERATING INSTRUCTIONS

GC0415

INTRODUCTION

Thank you for purchasing this CLARKE product.

Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to your purchase
giving you long and satisfactory service.

GUARANTEE

This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.

This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.

Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.

This guarantee does not effect your statutory rights.

ENVIRONMENTAL RECYCLING POLICY

Through purchase of this product, the customer is taking on the
obligation to deal with the WEEE in accordance with the WEEE
regulations in relation to the treatment, recycling & recovery and
environmentally sound disposal of the WEEE.

In effect, this means that this product must not be disposed of with general
household waste. It must be disposed of according to the laws governing
Waste Electrical and Electronic Equipment (WEEE) at a recognised disposal
facility.

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SAFETY INFORMATION

WARNING: TAKE CARE WHEN USING THIS METER. IMPROPER USE CAN
RESULT IN ELECTRIC SHOCK OR DAMAGE TO THE METER. TAKE ALL
NORMAL SAFETY PRECAUTIONS AND FOLLOW THE SAFEGUARDS
SUGGESTED IN THIS MANUAL.

BEFORE USE

1. When using the meter, the user must observe all normal safety rules
concerning:

• General protection against electric shock.

• Protection of the meter against misuse.

2. When the meter is delivered, confirm it has not been damaged in transit.

3. The test leads must be kept in good condition. Before using, check that the
insulation on the test leads has not been damaged or any wire exposed.

4. Use only the test leads supplied to ensure operational safety. If necessary,
they must be replaced with test leads of the same model or class.

DURING USE

1. Do not take measurements that exceed the maximum values for this
meter.

2. Do not touch the metal probes of the test leads when the meter is
connected to the circuit being measured.

3. Keep your fingers behind the probe barriers when taking measurements.

4. Do not take voltage measurements if you suspect the value exceeds 600V.

5. If the appropriate value range is unknown, select the highest range on the
scale.

6. Disconnect the test leads from the circuit under test before turning the
rotary function selector.

7. Do not measure the resistance, diode or continuity of live circuits.

8. Do not connect the meter to any voltage source while the rotary selector is
in the Current, Resistance, Diode or Continuity range.

9. Do not use the meter near explosive gases or steam.

10. Stop using the meter if any abnormalities or faults are observed.

11. Do not use the meter unless its rear case and battery cover is correctly and
securely fastened.

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12. Do not store or use the meter in areas exposed to direct sunlight, at high
temperature or with high relative humidity.

13. To avoid false readings, replace the batteries as soon as the Low Battery
indicator appears.

14. Before use, verify the meter operation by measuring a known voltage.

15. Never touch exposed wiring, connections or any live circuit while taking
any measurements.

16. Keep your body isolated from ground by using dry clothing, rubber shoes,
rubber mats or any approved insulating material.

SAFETY SYMBOLS

Please read all of the safety and operating instructions carefully before using
this product. The following safety symbols may be found on the product.

General hazard

High voltage danger.

warning

Earth Class II cabling without

earth conductor.

Possibility of high
voltage

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FEATURES

COMPONENTS OF THE METER

1. Liquid Crystal Display (LCD)

2. Rotary switch

• Selects both different functions and ranges

3. VmA Jack

4. COM jack

5. 10A Jack

6. Data Hold button

• Press the HOLD button. The LCD will hold the last reading measured and

display the H symbol. When the button is released, the meter will return
to normal.

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MEASUREMENT FEATURES OF THIS METER

• AC voltage measurement:- V~

• DC voltage measurement:- V

• DC current measurement:- A

• Resistance measurement:-

•Diode measurement:-

Ω

ITEMS SUPPLIED

• Multi-meter

• Pair of test lead/probes (1 red/1 black)

• PP3 type 9-volt battery

• Polymer holder c/w fold-out stand

SPECIFICATION

Model Number CDM10C

Product dimensions: (D x W x H) 40 x 75 x 144 mm

Weight (including case) 303 g

Test leads length (inc probes) 990 mm

Max voltage between input & earth CATII 250V

Fuse F1 125mA/600V F2 10A/600V

Power PP3 9V battery, (NEDA 1604 or 6F22)

Maximum display value 1999

Over-range indication “1”

Polarity display “-” for negative polarity

Detects and measures voltages DCV 200m/2/20/200 ± 0.5%, 600±0.8%

ACV 200,600 ±1.2%

Detects and measures resistance Ohm 200/2k/20k/200k ± 0.8%, 2M ±

1%

Detects and measures current DCA:20µ, 200µ, 2m, 20m ± 1%, 200m±

1.5%, 10 ± 3%

Operating temperature

Storage temperature

°C

0-40

-10°C to 50°C

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OPERATION

Before taking the measurement of voltage with the probe, make sure there is
no electronic device connected to the test socket of the instrument.

DC VOLTAGE MEASUREMENT

Range Resolution Accuracy

200mV

2V 1mV

20V 10mV

200V 100mV

600V 1V ± 0.8% of reading, ± 5 digits

• Overload protection: 200mV range: 250V dcor rms the other ranges

600V dc or rms

DC CURRENT MEASUREMENT

Range Resolution Accuracy

µA 0.01µA

20

200

µA 0.1µA

2mA

20mA

200mA

10A 10mA ± 3% of reading, ±10 digits

0.1µV

1

µA

10

µA

100

µA

± 0.5% of reading, ± 3 digits

± 1% of reading, ±3 digits

± 1% of reading, ± 5 digits

± 1.5% of reading, ± 5 digits

• Overload protection: F1 250mA/600V Fuse F2 10A/600V

AC VOLTAGE MEASUREMENT

Range Resolution Accuracy

200V 0.1mV

600V 1V

• Overload protection: 600V or rms Frequency range: 40Hz to 400Hz

• Display: Average (effective value of sine wave).

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± 1.2% of reading, ± 10 digits

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RESISTOR

Range Resolution Accuracy

200

Ω

Ω

2k

20k

Ω

200kΩ

Ω

2M

• Maximum open circuit voltage: 3.2V

• Overload protection: 250V DC or rms

0.1Ω

1Ω

10Ω

100Ω

1kΩ ± 1.0% of reading, ± 5 digits

± 0.8% of reading, ± 5 digits

± 0.8% of reading, ± 2 digits

BEFORE OPERATION

1. If the battery is low when the meter is switched on, the symbol will
display. You will need to replace the battery.

2. The beside the probe jack indicates that the input voltage or current
should not exceed the specified limits in order to protect the internal
circuits.

DC VOLTAGE MEASUREMENT

1. Insert the red probe into the “ mAVΩ” jack and the black probe into
the COM jack.

2. Turn the rotary switch to the range of V and connect the probes to the
power supply or load to be measured. The value detected will be
displayed.

NOTE: If you do not know the measured voltage range in advance, set

the function/range switch to the maximum range, and then
gradually turn to smaller ranges until a satisfactory resolution is
found.

NOTE: If the display shows “1”, this indicates an over-range measurement

and the switch should be set to a higher range.

NOTE: Do not input a voltage of more than 250V. The meter is capable of

indicating a higher voltage, but with the risk of damaging the
internal circuits.

NOTE: When measuring high voltages, pay special attention to avoid an

electric shock.

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DC CURRENT MEASUREMENT

1. Plug the black probe into the COM jack. For current to be measured not
exceeding 200mA, plug the red probe into the “ mAV
current to be measured between 200mA and 10A, plug the red probe into
the 10A jack.

2. Set the rotary switch to the desired A range and connect the probe in
series with the load to be measured. The current value and the polarity
connected to the red probe will be shown on the display.

NOTE: If you do not know the measured voltage range in advance, set

the rotary switch to the maximum range, and then gradually turn
to smaller ranges until satisfactory resolution is found.

NOTE: If the display shows “1”, this indicates an over-range

measurement, and the switch should be set to a higher range.

NOTE: The symbol beside the probe indicates the maximum input

current is 200mA or 10A, depending on the inserted
jack.depending on the inserted jack. Excess current will blow the
fuse.

AC VOLTAGE MEASUREMENT

Ω” jack. For

1. Plug the red probe into the “ mAV
the “COM” jack.

2. Turn the rotary switch to V~ and connect the probe to the power supply or
load to be measured.

NOTE: Refer to points above for direct current voltage measurement.

RESISTANCE MEASUREMENT

1. Plug the black probe into the COM jack and the red one into the
mAV

Ω jack.

2. Turn the rotary switch to the COM jack and connect the test probes to the
resistor being measured. Read the results on the display.

NOTE: If the resistor being measured is greater than the maximum value

of the selected range, the display will show “1”, requiring the
selection of a higher range. It normally takes a few seconds for
the reading to get stable when measuring a resistor larger than
1M

Ω.

NOTE: In default of input, for instance, open circuit, the display shows

“1”.

NOTE: When measuring an online resistor, de-energize the circuit being

measured and discharge all capacitors.

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Ω” jack and the black probe into

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DIODE MEASUREMENT

1. Insert the black probe into the COM socket and the red one into the

Ω.mA, to give the red probe positive polarity.

V

2. Turn the rotary switch to the range, and connect the red probe to the
positive pole of the diode being measured and the black one to the
negative pole. Read the approximate forward voltage drop of the diode
on the display.

MAINTENANCE

GENERAL CARE

WARNING: BEFORE REMOVING THE REAR COVER, DISCONNECT THE
PROBES FROM THE CIRCUIT TO BE MEASURED. ENSURE THE COVER IS
TIGHTLY SECURED BEFORE USING THE INSTRUMENT.

Clean the housing of the meter only with a wet rag dipped in a little detergent
but never a chemical solution.

In case of any abnormality, stop using the meter and send it for maintenance.

REPLACEMENT OF BATTERY AND FUSE

1. The battery for this multimeter is a PP3 (9Volt) as stated on page 4. The
replacement should be of the same specification.

2. Replacment of the fuse, if necessary, is better done by your Clarke service
department using one of those listed on page 6.

3. Never use the meter until the rear cover is screwed on after replacing a
battery or fuse.

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DECLARATION OF CONFORMITY

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