Megger MMC850 Data sheet
Multi-core AC digital clamp meter
MMC850
Multi-core AC digital clamp meter
■
Single, two or three core cable
measurement
■
Flat or round section cables
■
No need to split wires
■
Cable centralising clamp
■
Backlit display
■
50Hz and 60Hz supplies
■
IEC 1010-2-032, CAT III 600 V safety
protection
MMC850
DESCRIPTION
The NEW Megger MMC850 offers a unique solution to
current measurement in multi-core cables, without the need
to split cores. Simply clamp the MMC850 to a multicore
cable and read the current flowing.
Conventional current clamp meters have been available for
many years and are an accepted method of non-intrusive
current
measurement. However these instruments can only
measure current in a single core cable, requiring multi-core
cables to be split before a core can be measured.
Unlike conventional clamp meters, the MMC850 has a complex array of Planer magnetic sensor coils to calculate the
current flowing in the conductors of multicore cables with
either 2 or 3 cores, and in either flat or round section cable,
up to 100 A. The convenience and potential time saving
from using the multi-core clamp is considerable.
A single button switches the clamp between multi-core and
single core operation, ensuring the MMC850 is the only
clamp meter you need to carry.
The MMC850 has a tough and lightweight clamp head, allow
good access to awkward locations and cables.
The inner jaw clamp centralises the cable to be measured
ensuring best accuracy.
The MMC850 is suitable for supply frequencies from 45Hz to
400Hz. Current measurement to 200 A on single core and
100 A on multi-core cables is possible, with a resolution to
0.1 A, so covering the majority of power applications including Military/Aviation.
SAFETY
The tough case is manufactured in ABS and the contoured
design fits comfortably in the hand with a positive finger
guard.
The MMC850 meets the requirements of IEC1010-2-032,
Cat III 600 V, and is rated as safe for connection and
disconnection to live conductors.
APPLICATIONS
Use it anywhere where you want to measure current without breaking a circuit or splitting cables. The MMC850 can
also be used in place of traditional clamp meters, when
commissioning, or for general maintenance work in
electrical machinery and installations.
In many applications, the indication of voltage alone is
insufficient to verify that an appliance is working.
For instance, having fitted a new thermostat to a water
heater, a neon may indicate voltage, but the element may be
open-circuit. With the MMC850 you can verify and measure
the current simply by clamping round the outer cable
sheath.
When fault-finding, a voltmeter may indicate a voltage at the
terminals of a single-phase motor, but not help diagnose the
problem any further. With the MMC850, the distinction may
be made between a high current potentially indicating a
shorted winding or locked rotor and an open-circuit fault,
such as a disconnected termination or burnt-out winding.
MMC850
Multi-core AC digital clamp meter
OPTIMISED CABLE TYPES
The advanced measuring techniques used by the MMC850 enables the measurement of current in 1-, 2- or 3-core cables of most
configurations. It is optimised for the most commonly encountered cable types (see table), and will give an approximation of the
current in others.
Optimised Cables
opean
Eur
H05VV-F (3-core) 1.5mm
H05VV-F (3-core) 2.5mm
A05VVH2-RU 2.5mm
A05VVH2-RU 4.0mm
A05VVH2-RU 6.0mm
2
2
2
2
2
H05VV-F (2-core) 0.75mm
H03VV-F (2-core) 0.75mm
T4 6004 (Flat Triple) 2.5mm
T4 6004 (Flat Triple) 3.5mm
T4 6004 (Flat Triple) 10mm
T4 6004 (Flat Triple) 16mm
6193Y (Flat Triple) 1.5mm
6193Y (Flat Triple) 2.5mm
6193Y (Flat Triple) 4.0mm
2
2
2
North American
1277 CVTC Wire 12 AWG
1277 CVTC Wire 10 AWG
1277 CVTC 2 Wire Flat D10
1277 CVTC 2 Wire Flat D14
1277 CVTC 2 Wire Flat D16
1277 CVT
1277 CVT
C 2 Wire Flat D18
ire 10 AWG
W
C 2
1277 CVTC Wire 14 AWG
1277 CVTC Wire 18 AWG
1277 CVT
1277
C Wire 16 AWG
C 3
VNT
ire 10 round
W
1277 VNTC 3 Wire 18 round
1277 CVTC 3 Wire 16 AWG
1277 VNTC 3 Wire 16 round
1277 VNTC 3 Wire 12 round
62 SO 2 wire round 14 AWG
62 SO 3 wire round 14 AWG
1277 CVTC 3 Wire 12 AWG
UF-B Unshielded 12 AWG
2
2
2
2
2
2
UF-B Unshielded 10 AWG
NM-B Unshielded 14 AWG
SPT-2 Insulated 18 AWG
SPECIFICATIONS
(at 23°C±5°C : < 80% RH)
ac Amps
Battery life
180hrs typical
Main jaw capacity
13mm (0.51")
Inner jaw capacity
22mm (0.87")
Display
31/2digit
2000 count
Refresh
3 times / sec
Operating temp
0ºC to +40ºC
Storage temp
-20ºC to +60ºC
Mode
Range
Resolution
Altitude
2000m
Accuracy
Frequency
Response
Dimensions
H 227 mm x W 94 mm x D44.5mm
(8.94" x 3.7" x 1.75")
Single-Core Mode
200 A
0.1 A
1.5 % + 3 d
Safety
IEC1010-2-032
CATIII 600 V
45 hz - 1 kHz
EMC
Multi-Cor
e Mode
EN61326: 1997 Am:1998 Am:2001
100 A
he MMC850 is supplied complete with
A
0.1
5 % + 10 d
T
carry case and user guide.
45 hz - 400 Hz
equency
Fr
45Hz to 400Hz
Battery
Single PP3 9V Alkaline
ORDERING INFORMA
der Code
A
TES
Or
ay
Item (Qty)
MMC850 Multicore Clampmeter MMC850-EN
UK
Archcliffe Road Dover
CT17 9EN England
T +44 (0) 1304 502101
F +44 (0) 1304 207342
UNITED ST
onze W
4271 Br
Dallas T X75237-1088 USA
T 800 723 2861 (USA only)
T +1 214 333 3201
F +1 214 331 7399
TION
OTHER TECHNICAL SALES OFFICES
Norristown USA, T
Mumbai INDIA, Trappes FRANCE,
Sydney AUSTRALIA, Madrid SPAIN
and the Kingdom of BAHRAIN.
onto CANADA,
or
Registered to ISO 9001:2000 Cert. no. Q 09290
Registered to ISO 14001-1996 Cert. no. EMS 61597
MMC850_DS_en_V02
www.megger.com
Megger is a r
egister
ed trademark
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