Megger DCM300E Manual

Megger Multimeter DCM300E

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Side 1/4

DCM300E Earth Leakage Clamp Meter

Safety Warnings

■ Do not take measurements beyond maximum selected range.

■ Take extreme care and keep hands behind the hand guard when

taking measurements above 30 V RMS.

■ Do not operate the instrument with the battery cover removed.

Do not operate the instrument if any part of it is damaged.

■ Do not operate the instrument in environments subject to high

temperature, damp, humidity or excessive vibration.

■ Safety Warnings must be read and understood before the

instrument is used, and observed during use.

Note: The instrument must only be used by suitably

trained and competent persons

General Description

The DCM300E is a rugged lightweight pocket size clamp meter designed to

measure a.c. earth leakage currents. This enables earth leakage faults to be

detected and located without having to isolate and disconnect circuit wiring.

Additionally, the DCM300E measures a.c. circuit currents up to 300 Amps.

of microprocessor technology and features a clear 31⁄2 digit LCD combining

digital and bar-graph analogue readings.

The two position mode switch provides 4 ranges; 30 mA, 300 mA, 30 A and 300

A, with minimum resolution of 0,01 mA on the 30 mA range.

To conserve battery power, Auto shut off operates after a period of 10 minutes

of inactivity by the instrument. The instrument can be switched back on by

selecting Off and then On again.

Measurement of Leakage Current

Earth Conductors

1) Set the range selector switch to the

30 /300 mA position.

2) Set the Power switch to On.

3) Ensure that the Data hold switch is

Off. DH is not displayed.

4) Clamp the jaws around the earth

conductor.

5) If necessary, press the Data hold switch

DH is displayed.

6) Take the reading from the Digital and/

or Bar-graph display.

Single phase or 3 phase conductors

1) Set the range selector switch to the

30 /300 mA position.

2) Set the Power switch to On.

3) Ensure that the Data hold switch is

Off DH is not displayed.

4) Clamp the jaws around both the

phase and neutral conductors, or the

3 phase conductors in the case of

3 phase supplies

5) If necessary, press the Data hold switch

DH is displayed.

6) Take the reading from the Digital and/

or Bar-graph display.

Features and Controls

Measurement of Line Current

1) Set the range selector switch to the

30 /300 mA position.

2) Set the Power switch to On.

3) Ensure that the Data hold switch is Off

DH is not displayed.

4) Clamp the jaws around one

conductor of the circuit under test.

5) If necessary, press the Data hold switch

DH is displayed.

6) Take the reading from the Digital and/

or Bar-graph display.

Battery Replacement

1) When the symbol appears on

the display, the two 1,5 V button cells

must be replaced.

2) Switch the DCM300E Off.

3) Loosen the small cross head screw

securing the battery cover, and remove

the cover. Take care not to lose the

small screw.

4) Remove both exhausted cells and

carefully ﬁt two new cells into the

recess. Position both cells +ve side up.

5) Replace the battery compartment

cover and re-secure with the small

cross head.

Battery cover screw: The correct size screw must be used and ﬁtted to ensure battery cover security, and safe operation.

Wrist strap point

Transducer jaws

Mode selector switch (mA / A)

On / Off switch

⁄2 Digit LCD display

Data hold switch

Jaw opening lever

Jaw guard

Tactile handguard

www.megger.com

Speciﬁcation

Display: 3½digit L.C.D.

Maximum Indication: 3200.

Over Range Indication:

Data Hold Indication: DH

Low Battery Indication:

2.5 V ~ 2,7 V

Auto Shut-Off: Operates after approximately 10 minutes

of instrument inactivity.

Accuracy: 50 / 60 Hz at 23 °C ± 5 °C and 80% R H

non condensing.

Range Min. Resolution Accuracy

30 / 300 mA .......... 0,1 mA ...........± 1,2% of reading ± 5 digits.

30 / 300A .............. 0,01 mA ..........0 - 200A ± 1,2% of reading ± 5 digits.

200 - 250A - 3,0% of reading ± 5 digits.

250 - 300A ± 5,0% of reading ± 5 digits.

Limitation of Circuit Voltage: Less than 600 V a.c.

Sampling Time: Digital - Approx 2 x per second.

Analogue - Approx 12 x per second.

Operating Temperature: 0˚C - 40˚C, <80% RH

(Non condensation).

Storage Temperature: -10˚C - 60˚C, <70% RH

(Non condensation).

Power Source: 2 x 1,5 V Button battery type LR44

or SR44.

Power Consumption: Approx 5 mW.

Battery Life: Typically 50 hours.

Flash Test: 3700 V a.c. / 1 minute max

(Between CT core and housing).

Safety: IEC61010-1:2010

EMC: EN61326

Safety Rating: CAT II 600 V phase to earth, CATIII 300 V phase to earth,

500 V phase to phase

CATIV - Measurement category IV: Equipment connected

between the origin of the low-voltage mains supply

outside the building and the consumer unit.

CATIII - Measurement category III: Equipment connected

between the consumer unit and the electrical outlets.

CATII - Measurement category II: Equipment connected

between the electrical outlets and the user’s equipment.

Jaw Opening Capability: 40 mm diameter.

Dimensions: 64 mm x 176 mm x 23 mm

Weight: Approximately 125 gm.

Cleaning: Wipe with a clean cloth damped with soapy water or

Isopropyl Alcohol (IPA).

Repair and Warranty

The instrument contains static sensitive devices, and care must be taken in

handling the printed circuit board. If an instrument’s protection has been

impaired it should not be used, but sent for repair by suitably trained and

qualiﬁed personnel. The protection is likely to be impaired if for example; it

shows visible damage; fails to perform the intended measurements; has been

subjected to prolonged storage under unfavourable conditions, or has been

subjected to severe transport stresses.

Note: Any unauthorised prior repair or adjustment will automatically invalidate

the warranty.

Instrument repair and spare parts

For service requirements for Megger instruments contact:

Megger Limited

Archcliffe Road

Dover, Kent CT17 9EN

England

T +44 (0)1 304 502101

F +44 (0)1 304 207342

www.megger.com

or an approved repair company.

Returning and Instrument for Repair

If it is necessary to return an instrument for repair, a Returns Authorisation

number must ﬁrst be obtained by contacting one of the addresses shown. You

will be asked to provide key information, such as the instrument serial number

and fault reported when the number is issued. This will enable the Service

Department to prepare in advance for the receipt of your instrument, and to

provide the best possible service to you.

The Returns Authorisation number should be clearly marked on the outside of

the product packaging, and on any related correspondence. The instrument

should be sent, freight paid to the appropriate address. If appropriate a copies

of the original purchase invoice and of the packing note, should be sent

simultaneously by airmail to expedite clearance through customs.

For instruments requiring repair outside the warranty period a repair estimate

will be submitted to the sender, if required, before work on the instrument

commences.

Symbols used on the instrument:

Caution: Refer to accompanying notes.

Equipment protected throughout by Double Insulation (Class II).

Equipment complies with EU Directives

WEEE Directive

The crossed out wheeled bin symbol on the instrument and on the

batteries is a reminder not to dispose of them with general waste at the end of

their life.

Megger is registered in the UK as a Producer of Electrical and Electronic

equipment. The registration no is; WEE/DJ2235XR. Users of Megger products

in the UK may dispose of them at the end of their useful life by contacting B2B

Compliance at www.b2bcompliance.org.uk or by telephone on 01691 676124.

Users of Megger products in other parts of the EU should contact their local

Megger company or distributor.

Battery Disposal

Batteries in this product are classiﬁed as Portable Batteries under the Batteries

Directive. Please contact Megger Ltd for instructions on the safe disposal of these

batteries. For disposal of batteries in other parts of the EU contact your local

distributor. Megger is registered in the UK as a producer of batteries.

The registration number is BPRN01235. For Further information see

www.megger.com

Megger Limited - Archcliffe Road,

Dover, Kent, CT17 9EN England.

The company reserves the right to change the speciﬁcation or

design without prior notice. Made in Japan

Megger is a registered trademark

Part No. DCM300E--6172-172_UG_EN-DE_V04

www.megger.com

Produkt Specifikationer

Mærke:	Megger
Kategori:	Multimeter
Model:	DCM300E

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