SEFRAM MW 3950 User manual

Notice d’utilisation
User’s Manual
MW 3950
Pince courant de fuite
Leakage current Clampmeter
M3950M00

14
Safety Information
To ensure safe operation and service of the
Tester, follow these instructions.
Failure to observe warnings can result in
severe injury or death.
-Avoid working alone so assistance can be
rendered.
- Do not use test leads or the Tester if they
look damaged.
- Do not use the Tester if the Tester is not
operating properly or if it is wet.
- Use the Tester only as specified in the
Instruction card or the protection by the
Tester might be impaired.
- Use extreme caution when working around
bare conductors or bus bar.
Contact with the conductor could result in
electric shock.
Symbols as marked on the Tester
and Instruction manual
Risk of electric shock
See instruction card
DC measurement
Equipment protected by double or
reinforced insulation
=Battery
Earth
AC measurement
Conforms to EU directives
F
Application around and removal from
hazardous live conductors is
permitted
Do not discard this product or throw
away

15
Caution
Take sufficient care to not to apply shock,
vibration or excessive force to the jaw tips.
Power On / Off
•The Meter displays Battery Capacity when
powering up. Please replace the battery
when 0% is shown.
Auto Power Off Enable / Disable

16
Auto Hold Enable / Disable
Auto Backlight
Caution
If the meter is used in the vicinity of equipment
which generates electromagnetic interference,
the display may become unstable or the
measurements show may be subject to large
errors.

17
ACA
Leakage Current Measurement

18

19
Data Hold
Data Hold Beep Guard
The internal sounder will beep continuously
with the LCD display flashing in the Data Hold
mode when the measured signal is larger 50
counts than the LCD reading.

20
Peak Hold
(forcing into the manual range mode)
Low Pass Filter
(forcing into the manual range mode)

21
•The Cut-Off frequency of the low pass
filter is about 100Hz with attenuation
characteristic of approx. –24dB/octave.
Auto Range / Manual Range

22
Comparator
•The Meter offers 3 limit values (0.25mA,
0.5mA and 3.5mA) in accordance with
safety standards.
•The internal sounder will beep continuously
with the LCD display flashing when
measured value exceeds the confirmed limit
value.

23
Auto Power Off
Auto Hold

24
Battery Replacement
Maintenance
Do not attempt to repair this Tester.
It contains no user-serviceable parts.
Repair or serving should only be performed
by qualified personnel.
Cleaning
Periodically wipe the case with a dry cloth and
detergent do not use abrasives or solvents.
Specifications
1-1 General Specifications
LCD display digits :
6000 digit large scale LCD readout.
Measuring rate : 5 times / sec.
Overrange display :
Shows the real value for “100A” and
shows “OL” for other ranges.
Automatic power off time :
Approximately 20 minutes after power on
without operations.
Low battery indicator : =is displayed.
Replace the battery when the indicator =
appears in the display.
Power requirement : 1.5Vx2 batteries.
Battery type and life : ALKALINE 60 hours.

25
1-2 Environmental Conditions
Indoor Use.
Pollution degree : 2
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).
Operating altitude : 2000m (6562 ft)
Conductor Size : 40mm diameter.
Shock vibration :
No shock, No vibration to the jaw tips.
Temperature coefficient :
0.2 x (Specified accuracy) / °C, < 18°C, > 28°C
EMC : EN 61326-1
Overvoltage category :
IEC 61010-1 300V CAT.Ⅲ
CAT Application field
ⅠThe circuits not connected to mains.
ⅡThe circuits directly connected to Low-
voltage installation.
ⅢThe building installation.
ⅣThe source of the Low-voltage installation.

26
1-3 Electrical Specifications
Accuracy is ±(% reading + number of digits)
at 23°C ±5°C < 80%RH. The specifications
of 50 ~ 100A is not Specified.
Current
Range Resolution Accuracy
6mA * 0.001mA
60mA 0.01mA
600mA 0.1mA
6A 0.001A
60A 0.01A
100A 0.1A
0 ~ 50A
1% + 3D (50 ~ 60Hz)
50 ~ 60A
5% + 6D (50 ~ 60Hz)
60 ~ 100A
8% + 6D (50 ~ 60Hz)
* There is a little rolling within ±3 digits.
Frequency Response (61~400Hz) :
2%+6D(0~40A), 30%+6D(40~100A)
Influence of external magnetic field of
adjacent wires : 0.0005% typical value.
Position Error : ±1% of reading
Low Pass Filter
Range Resolution Accuracy
6mA * 0.001mA
60mA 0.01mA
600mA 0.1mA
6A 0.001A
60A 0.01A
100A 0.1A
0 ~ 50A
2% + 6D (50 ~ 60Hz)
50 ~ 60A
6% + 8D (50 ~ 60Hz)
60 ~ 100A
9% + 8D (50 ~ 60Hz)
* There is a little rolling within ±3 digits.
Attenuation characteristic :
approx. –24dB/oct
Cut-off frequency : 100Hz

DECLARATION OF CE CONFORMITY
according to EEC directives and NF EN 45014 norm
DECLARATION DE CONFORMITE CE
suivant directives CEE et norme NF EN 45014

SEFRAM INSTRUMENTS & SYSTEMES
32, rue Edouard MARTEL
42100 SAINT-ETIENNE ( FRANCE)
Declares, that the below mentionned product
complies with :
Déclare que le produit désigné ci-après est
conforme à :
The European low voltage directive 2006/95/EEC :
La directive Européenne basse tension 2006/95/CE
NF EN 61010-1 Safety requirements for electrical
equipement for measurement, control and laboratory
use. Règles de sécurité pour les appareils électriques de
mesurage, de régulation et de laboratoire.
The European EMC directive 2004/108/EEC:
Emission standard EN 50081-1.
Immunity standard EN 50082-1.
La directive Européenne CEM 2004/108/CE :
En émission selon NF EN 50081-1.
En immunité selon NF EN 50082-1.
Installation category Catégorie d’installation :
300V Cat III
Pollution degree Degré de pollution : 2
Product name Désignation :
Clamp Meter Pince ampèremétrique
Model Type : MW3950
Compliance was demonstrated in listed laboratory
and record in test report number La conformité à été
démontrée dans un laboratoire reconnu et enregistrée
dans le rapport numéro RC 3950
SAINT-ETIENNE the : Novermber 12, 2008
Name/Position :
T. TAGLIARINO / Quality Manager

SEFRAM
32, rue E. Martel
F42100 – Saint-Etienne
France
Tel : [phone]
Fax : [phone]
Lignes commerciales :
04.77.59.36.81 ou 80
SAV : 04.77.59.36.96
Web : www.sefram.fr
e-mail : [e-mail]