Velleman DCM266 User manual

DCM266

Digital Clamp meter

OPERATION MANUAL

GEBRUIKERSHANDLEIDING

MANUEL D’UTILISATEUR

DCM266 GB1

DCM266

Digital Clamp Multimeter

1. Safety Information

The meter is completely portable, LCD, 3 1/2 digit clamp with insulation test

function (with option 500V insulation tester unit). It has been designed

according to IEC-1010 concerning electronic measuring instruments with an

overvoltage category (CAT II) and pollution 2 and safety requirements for

handheld current clamps for electrical measurement and test.

Follow all safety and operating instructions to ensure that the meter is used

safely and is kept in good condition.

1.1 Preliminary

lWhen using this meter, the user must observe all normal safety rules

concerning :

- Protection against the dangers of electronic current.

- Protection of the meter against misuse.

lFull compliance with safety standards can be guaranteed only if used with

test leads supplied. If necessary, they must be replaced with the same

model or same electronic ratings. Measuring leads must be in good

condition.

1.2 During Use

lNever exceed the protection limit values indicated in specifications for

each range of measurement.

lWhen the meter is linked to measurement circuit, do not touch unused

terminals.

lWhen the value scale to be measured is unknown beforehand, set the range

selector at the highest position.

lBefore rotating the range selector to change function, disconnect test leads

from the circuit under test.

lWhen carrying out measurements on TV or switching power circuits,

always remember that there may be high amplitude voltage pulses at test

points which can damage the meter.

lNever perform resistance measurements on live circuits.

lAlways be careful when working with voltage above 60Vdc or 30Vac rms.

DCM266 GB2

lWhen the jaw are open and will be connected to the conductor under test,

your fingers must keep behind the barrier indicator.

lNever ground yourself when taking electrical measurements. Do not touch

exposed metal pipes, outlets, fixtures, etc. which might be at ground

potential. Keep your body isolated from ground by using dry clothing,

rubber shoes, or any approved insulating material.

1.3 Symbols

1.4 Maintenance

lBefore opening the meter, always disconnect test leads from all sources of

electric current.

lIf any faults or abnormalities are observed, the meter can not be used any

more and it has to be checked out.

lNever use the meter unless the back cover and the battery cover are in

place and fastened fully.

lDo not use abrasives or solvents on the meter, use a damp cloth and mild

detergent only.

Important safety information, refer to the operating manual

Dangerous voltage may be present

Earth ground

Double insulation (Protection class II)

DCM266 GB3

2. Description of the meter

This meter is a handheld 3 1/2 digital clamp meter for measuring DC and AC

voltage, AC current, resistance, continuity test and insulation test. Full overload

protection, low battery indication and over-range indication are provided.

Transformer jaws

óTrigger

ìData hold switch

öRotary switch

úLCD display

÷Input jacks

øDrop-proof wrist strap

íBarrier indicator

DCM266 GB4

2.1 Function and range selector

A rotary switch is used to measurement Functions and Ranges. When the

switch is set to OFF position, the meter does not operate.

2.2 Transformer jaws

Pick up the AC current flowing through the conductor. Press the TRIGGER

to open the transformer jaws. When the finger press on the TRIGGER is

released, the jaws will close again.

2.3 Data hold

A push switch (Push ON, Push OFF. All ACA, ACV, DCV ranges with this

feature)

2.4 Input jacks

This meter has three input jacks that are protected against overload to the

limits.

During use connect the black test lead to COM jack and connect red test

lead to V Ωjack. The red test lead is depended on function selected.

The EXT jack is used for accept insulation tester unit EXT banana plugs, when

measurement insulation resistance.

DCM266 GB5

3. Operating instruction

3.1 Measuring current

1. Set the rotary switch at desired AC range position. The transformer jaws

pick up the AC current flowing through the conductor.

2. When only the figure " 1" displayed, it indicates overrange situation and the

higher range has to be selected.

3.2 Insulation test

(Option 500V insulation tester unit (not available in France and Benelux market))

1. Connect the insulation test unit V Ω, COM, EXT three bananaplugs to the

clamp meter V Ω, COM, EXT.

2. Set the rotary switch of the clamp meter at 2000MΩposition.

3. Set the insulation tester unit range switch to the 2000MΩposition.

4. Use the insulation tester unit of the test leads connect its L, E input connect

to being tested installation’s. ( Test installation’s must be power OFF.)

5. Set the insulation tester power switch to the ON position.

6. Depress the PUSH 500V push-push switch, the 500V on red LED lamp will

light. Clamp meter display reading is the insulation resistance value. If the

reading is below 19MΩ, change clamp meter and insulation tester unit to

20MΩrange, can be increase the accuracy.

7. If the insulation tester unit is not used, the power switch must shift to power

OFF position, and the test leads must leave the E, L input connect. That can

be increase battery life and prevent electrical shock hazard.

Wrong Correct

DCM266 GB6

3.3 Measuring voltage

1. Connect the black test lead to the COM jack and the red test lead to the V Ω

jack.

2. Set the rotary switch at the desired DCV or ACV range position and connect

test leads across the source or load under measurement.

The polarity of the red lead connection will be indicated along with the

voltage value when making DC voltage measurement.

3. When only the figure " 1" is displayed, it indicates overrange situation and

the higher range has to be selected.

3.4 Measuring resistance

1. Connect the black test lead to the COM jack and the red test lead to the V Ω

jack.

2. Set the rotary switch at desired Ωposition and connect test leads across the

resistor under measurement.

NOTE :

1. If the resistance being measured exceeds the maximum value of the range

selected or the input is not connected, an overrange indication " 1" will be

displayed.

2. When checking in-circuit resistance, be sure the circuit under test has all

power removed and that all capacitors have been discharged fully.

3.5 Continuity test

1. Connect the black test lead to the COM jack and the red test lead to the V Ω

jack. ( The polarity of the red lead is positive " +")

2. Set the rotary switch at position and connect test leads across two points

of the circuit under testing. If continuitiy exists ( i.e., resistance less than

about 50Ω), built-in buzzer will sound.

DCM266 GB7

4. Specifications

Accuracy is specified for a period of one year after calibration and at 18°C

to 28°C (64°F to 82°F) with relative humidity to 80%.

4.1 General

DISPLAY 3 1/2 digit LCD, with automatic polarity

indication

MEASURING dual-slope integration A-D converter

system

OVERRANGE INDICATION "1" figure only in the display

MAXIMUM VOLTAGE BETWEEN

TERMINALS AND EARTH

GROUND CAT II 600V

OPERATING TEMPERATURE 0°C to 40°C (32°F to 104°F)

STORAGE ENVIRONMENT -10°C to 50°C (14°F to 122°F)

POWER SUPPLY 9V battery

ACCESSORIES operating manual, set of test leads

LOW BATTERY INDICATION " BAT " appears on the display

SIZE (H x W x L) 37 x 90 x 230 mm (1.46" x 3.54" x

9.06")

WEIGHT approx. 320g (including battery)

4.2 AC current

Range Resolution Accuracy Note

200A 100mA ±2.0% of rdg ± 5 digits

600A 1A ±2.0% of rdg ± 5 digits

Frequency Range : 50Hz to 60Hz

Response : Average, Calibrated in rms of sine wave

Overload protection : 1200A within 60 seconds. Jaw opening : 2" (5cm)

DCM266 GB8

4.3 Insulation test

With option 500V insulation tester unit.

Range Resolution Accuracy Note

20MΩ10KΩ±2.0% of (rdg-50) ± 2 digits

2000MΩ1MΩ±4.0% of (rdg-100) ± 2 digits ≤500MΩ

±5.0% of (rdg-100) ± 2 digits > 500MΩ

4.4 AC Voltage

Range Resolution Accuracy

600V 1V ±1.0% of rdg ± 4 digits

Input Impedance : ≥9MΩon all ranges

Overload protection : 600V peak or 600Vrms AC on all ranges

Frequency Range : 50Hz to 500Hz

Response : Average, calibrated in rms of sine wave

4.5 DC voltage

Range Resolution Accuracy

600V 1V ±0.8% of rdg ± 2 digits

Input impedance : >9MΩ

Over protection : 250Vrms AC for 200mV range

600V peak or 600V rms AC for other ranges

DCM266 GB9

4.6 Resistance

Range Resolution Accurcacy

200Ω0.1Ω±1.0% of rdg ± 3 digits

20KΩ10Ω±1.0% of rdg ± 1 digit

Overload protection : 250V dc or 250Vrms AC on all ranges

Open circuit voltage : 700mV

5. Accessories

Test leads

Battery

Operating manual

6. Battery replacement

If the sign "BAT" appears on the LCD display, it indicates that battery should

be replaced. Remove the battery cover of case. Replace the exhausted battery

with a new one.

WARNING

Before attempting to open the battery cover, be sure that test leads have been

disconnected from measurement circuit to avoid electric shock hazard.

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