Megger DCM340 Clamp Meter User Guide
- June 4, 2024
- Megger
Table of Contents
DCM340
Clamp meter
User Guide
Safety Information
To ensure safe operation and service of the Meter, follow these instructions.
Failure to observe warnings can result in severe injury or death.
- Avoid working alone so assistance can be rendered.
- To enhance safety, test leads should be disconnected from the instrument when not in use.
- Do not use test leads or the Clamp Meter if they look damaged.
- Do not use the Meter if the Clamp Meter is not operating properly or if it is wet.
- Use the Clamp Meter only as specified in the Instruction card or the protection provided by the Clamp Meter might be impaired.
- Special precautions are necessary when operating in situations where exposed live parts at dangerous voltages may be encountered. Personal protective equipment (not supplied with this instrument) should be used.
- The test leads should be disconnected from the instrument when making a current measurement.
- Use caution with voltages above 30 V ac RMS or 60 V dc. These voltages pose a shock hazard.
- To avoid false readings that could lead to electric shock and injury, replace the battery as soon as the low battery indicator ( ) appears.
CAUTION :
CAUTION: If the meter is used in the vicinity of equipment that generates
electromagnetic interference, the display may become unstable or the
measurements shown may be subject to large errors.
1.1 Maintenance
Do not attempt to repair this Clamp Meter.
It contains no user-serviceable parts. Repair or serving should only be
performed by qualified personnel.
1.2 Cleaning
Periodically wipe the case with a dry cloth and detergent do not use abrasives
or solvents.
1.3 Safety, Hazard, and Warning symbols on the instrument
This paragraph details the various safety and hazard icons on the
instrument’s outer case.
| Warning: High Voltage, risk of electric shock
Caution: Refer to the user guide.
UK conformity. This equipment complies with current UK legislation
EU conformity. The equipment complies with current EU directives.
The equipment complies with current ‘C tick’ requirements.
Do not dispose of it in the normal waste stream.
Equipment is protected throughout by double insulation.
AC measurement
DC measurement
Reference earth connection. Not a protective earth terminal
Battery
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CAT IV – Measurement category IV: Equipment connected between the origin
of the low-voltage mains supply and distribution panel.
CAT III -Measurement category III: Equipment connected between the
distribution panel and electrical outlets.
CAT II – Measurement category II: Equipment connected between the
electrical outlets and the user’s equipment.
CAT I – Measurement category I: The circuits are not connected to mains.
Measurement equipment may be safely connected to circuits at the marked rating
or lower.
The connection rating is that of the lowest rated component in the measurement
circuit.
Operation
Auto Power Off disable Press buttons (except the Hold button) then switch the rotary knob to power on the Meter.
CAT.III.600 V with respect to earth for the jaw.
Do not hold the meter in front of the Tactile Barrier.
2: REL: Meter save the displayed offset value after one press of the ZERO
button. The LCD is displaying the relative value.
3: REL (flashing): A second press of the ZERO button saves the offset value,
with the present value then displayed.
1: Normal: Press and hold ZERO for ≥2 sec to return to normal operation and
cancel the offset value.
Low battery: “ ” is displayed or flashes when a button is pressed.
To avoid false readings that could lead to electric shock and injury, replace
the battery as soon as the low battery indicator ( ) appears.
2: MAX: Meter is saving the maximum and minimum values. The maximum value is
displayed
3: MIN: Meter is saving the maximum and minimum values. The minimum value is
displayed
4: MAX MIN (flashing): Meter is saving the maximum and minimum values. The
present value is displayed.
1: Normal: Press and hold MIN MAX to return to normal operation.
2: PMAX: Meter is saving the peak maximum and minimum value. The peak maximum
value is displayed.
3: PMIN: Meter is saving the peak maximum and minimum values. The Peak minimum
value is displayed
4: CAL: Press and hold the PEAK button ≥3 sec to calibrate the Meter itself
for accurate measurement.
1: Normal: Press and hold the PEAK button to return to normal operation.
Specifications
| Specification | Detail |
|---|
1-1 General Specifications
LCD display digits :| 3 3/4 digit large-scale LCD readout.
Display count :| 4000 counts.
Measuring rate :| 1.5 times / sec.
Overrange display :| “OL” is displayed for “Ω” functions, showing the real
value for “A” and “V” functions.
Automatic power off time :| Approximately 30 minutes after
Low battery indicator :| ** is displayed. Replace the battery when the
indicator appears in the display.
To avoid false readings that could lead to electric shock and injury, replace
the battery as soon as the low battery indicator appears.
Power requirement :| 9 V PP3 / 6LR61 battery. Rechargeable batteries are not
suitable for use with this instrument.
1-2 Environmental Conditions
Indoor Use.|
Calibration :| One year calibration cycle.
Operating temperature :| 0 °C ~ 30 °C (±80% RH)
30 °C ~ 40 °C (±75% RH)
40 °C ~ 50 °C (±45% RH)
Storage temperature :| -20 to +60 °C, 0 to 80% RH (batteries not fitted).
Overvoltage category :| IEC 61010-1 600 V CAT.III. CAT.III equipment is
designed to protect against the transients in the equipment in fixed
installations, such as distribution panels, feeders and short branch circuits
and lighting systems in large buildings.
Operating altitude :| 2000 m (6562 ft)
Conductor Size :| 35 mm diameter.
Pollution degree :| 2
EMC :| EN 61326-1
Shock vibration :| Sinusoidal vibration per MIL-T- 28800E (5 ~ 55 Hz, 3 g
maximum).
Drop Protection :| 1.2 m drop to hardwood on concrete floor.
1-3 Electrical Specifications**
Accuracy is ±(% reading + number of digits) at 23 °C ±5 °C < 80%RH.
Temperature coefficient :| Add 0.2 x (Specified accuracy) / °C, < 18 °C, > 28
°C .
Voltage| | Function| Range| Accuracy
---|---|---
V~| 0-400.0 Vrms
400-600 Vrms| ±(1.0%+ 5 dgt) 50
Hz – 500 Hz
V~| 0-400.0 V
400-600 V| ±(0.7% + 2 dgt)
Over voltage protection :| 600 V rms
Input Impedance :| 1 MΩ // less than 100 pF.
AC Conversion Type :| AC Conversion are average sensing rms indication
calibrated to the rms value of a sine wave input.
Resistance and Continuity :| | Function| Range| Accuracy
---|---|---
Ω| 400.0 Ω| ±(1% + 3 dgt)
Over voltage protection :| 600 V rms
Max. open circuit voltage :| 3 V
Continuity check :| Internal sounds activates if the resistance of the circuit
under test is less than 30Ω approximately.
AC Current| | Function| Range| Accuracy
---|---|---
A~
(50~60 Hz)| 0~400.0 A| ±(1.5%+ 5 dgt) 1
400~600 A| ±(2.0%+ 7 dgt)
A~
(61~400 Hz)| 0~400.0 A| ±(2.0%+ 5 dgt) 1
400~600 A| ±(2.5%+ 7 dgt)
1 :| Over 80% of full scale add ±1.6%
Overload protection :| 600 A RMS
AC Conversion Type and additional accuracy is the same as AC Voltage.
Position Error :| ±1% of reading.
DC Current| | Function| Range| Accuracy
---|---|---
A~| 0~400.0 A| ±(1.2%+ 5 dgt)
400~600 A| ±(1.9%+ 7 dgt)
Overload protection :| 600 A RMS
Position Error :| ±1% of reading.
Addition error according to remanence :| 1% max. of the current crest.
---|---
Auto Power Off (APO)| The meter will automatically shut itself off after
approximately 30 minutes after power on.
Frequency: Hz| | Function| Range| Accuracy
---|---|---
20~400 Hz| 1 Hz| ±(0.1% + 2 digit)
Overload protection :| 600 A RMS.
Sensitivity :| 3 A rms for ACA (Aa) (>400 Hz Unspecified)
Peak Hold :| ±(3% + 15dgt) >600 Vpeak Unspecified. *>600 A peak Unspecified.
Min/Max Hold :| add ± 15 dgt to accuracy for ACA / DCA.
- Automatically switch to the low-resolution range at Peak Hold and MIN MAX Hold.
Limited Warranty
This Meter is warranted to the original purchaser against defects in material
and workmanship for 1 year from the date of purchase. During this warranty
period, the manufacturer will, at its option, replace or repair the defective
unit, subject to verification of the defect or malfunction.
This warranty does not cover, disposable batteries, or damage from abuse,
neglect, accident, unauthorized repair, alteration, contamination, or abnormal
conditions of operation or handling.
Any implied warranties arising out of the sale of this product, including but
not limited to implied warranties of merchantability and fitness for a
particular purpose, are limited to the above. The manufacturer shall not be
liable for loss of use of the instrument or other incidental or consequential
damages, expenses, or economic loss, or for any claim or claims for such
damage, expense or economic loss. Some states’ or countries’ laws vary, so the
above limitations or exclusions may not apply to you.
4.1 Decommissioning
4.2 WEEE Directive
The crossed-out wheeled bin symbol placed on Megger products is a reminder
not to dispose of the product at the end of its life with general waste.
Megger is registered in the UK as a Producer of Electrical and Electronic
Equipment. The Registration No is WEE/ HE0146QT.
For further information about the disposal of the product consult your local
Megger company or distributor or visit your local Megger website.
4.3 Battery disposal
The crossed-out wheeled bin symbol placed on a battery is a reminder not to
dispose of batteries with general waste when they reach the end of their
usable life.
For disposal of batteries in other parts of the EU contact your local Megger
branch or distributor.
Megger is registered in the UK as a producer of batteries (registration No.:
BPRN00142).
For further information see www.megger.com
Manufacturing sites
Megger Limited
Arncliffe Road Dover
Kent
CT17 9EN
ENGLAND
T. +44 (0)1 304 502101
F. +44 (0)1 304 207342| Megger GmbH
Weststraße 59
52074 Aachen
T. +49 (0) 241 91380 500
E. [email protected]| Megger USA – Valley Forge
Valley Forge Corporate Center 2621 Van Buren Avenue Norristown
Pennsylvania, 19403
USA
T. +1 610 676 8500
F. +1 610 676 8610
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Megger USA – Dallas
4545 West Davis Street
Dallas TX 75237
USA
T. 800 723 2861 (USA only)
T. +1 214 333 3201
F. +1 214 331 7399
E. [email protected]| Megger AB
Rinkebyvägen 19, Box 724,
SE-182 17
DANDERYD
T. +46 08 510 195 00
E. [email protected]
Megger USA – Fort Collins
4812 McMurry Avenue| Suite 100
Fort Collins CO 80525
USA
T. +1 970 282 1200
The company reserves the right to change the specification or design
without prior notice.
Megger is a registered trademark
DCM340_UG_en_V02 08 2021
© Megger Limited 2020
www.megger.com
Documents / Resources
|
Megger DCM340 Clamp
Meter
[pdf] User Guide
DCM340, Clamp Meter, DCM340 Clamp Meter, Meter
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