MX 650
Pince multimètre AC
AC Clamp-on meter
AC-Vielfachmesszange
Pinza multimetro AC
Pinza multímetrica CA
MX 655
Pince multimètre ACrms/DC
ACrms/DC Clamp-on meter
ACrms/DC- Vielfachmesszange
Pinza multimetro ACrms/DC
Pinza multímetrica CArms/CC
Notice de fonctionnement
User's manual
Bedienungsanleitung
Libretto d'istruzioni
Manual de instrucciones
Chapitre II
User's manual
Chapter II - page 16
MX 650 / MX 655 1
Chapter II
TABLE OF CONTENTS
1. GENERAL INSTRUCTIONS.......................................17
1.1. Precautions and safety measures........................17
1.1.1. Before using..................................................17
1.1.2. When using the instrument...........................17
1.1.3. Symbols........................................................17
1.1.4. Instructions....................................................18
1.1.5. Cleaning........................................................18
1.2. Warranty...............................................................18
1.3. Maintenance.........................................................18
1.4. Unpacking - Repacking........................................18
2. DESCRIPTION OF THE INSTRUMENT.....................19
2.1. Description of front and rear.................................19
2.2. Description of the display.....................................20
3. GENERAL DESCRIPTION.........................................21
3.1. Battery installation and replacement....................21
3.2. Zero function and relative measurement..............
3.3. Memory.................................................................21
3.4. Automatic range...................................................21
3.5. Auto cut-off...........................................................21
3.6. PEAK function (1 ms)...........................................22
3.7. MAX MIN function (500 ms) .................................22
4. FUNCTIONAL DESCRIPTION ...................................22
4.1. Measuring AC voltage..........................................22
4.2. DC voltage measurement ....................................23
4.3. Measuring AC current..........................................23
4.4. Measurement of direct current (MX 655 only)......24
4.5. Measuring resistance...........................................24
4.6. Continuity test with buzzer....................................25
4.7. Diode test.............................................................25
4.8. Measurement of the voltage frequency................26
4.9. Measurement of the current frequency.................26
5. TECHNICAL SPECIFICATIONS ................................27
5.1. General.................................................................27
5.2. Characteristics......................................................27
5.2.1. Direct voltage (automatic ranges).................27
5.2.2. Alternating voltage (automatic ranges).........27
5.2.3. Direct current (MX 655 only).........................27
5.2.4. Alternating current.........................................28
5.2.5. Resistance (Ω) (automatic ranges)...............28
5.2.6. Diode .....................................................28
5.2.7. Frequency Hz (automatic ranges).................28
5.3. Safety...................................................................28
5.4. General information..............................................29
5.5. Environmental conditions............................
5.5.1. Temperature .................................................29
5.5.2. E.M.C............................................................29
5.6. Delivery configuration...........................................29
.........29
21
16
MX 650 / MX 655
Chapter II
1. GENERAL INSTRUCTIONS
1.1. Precautions and safety measures
1.1.1. Before using
You have just acquired a 4,000-count multimeter clamp. We
thank you for your confidence.
This multimeter clamp complies with the IEC 61010 norms
concerning electronic measuring instruments. For your own
safety and to prevent damage to the instrument, you must
follow the instructions given in this manual.
∗ This instrument can be used for measuring category III
installation circuits, in an environment with a pollution
degree of 2 and with a voltage no higher than 600 V in
relation to the earth.
∗ Definition of the installation categories
(see IEC 61010-1 publication):
CAT I: CAT I circuits are circuits protected by low level
transient -voltage surge limiters
Example: protected electronic circuits
: CAT II circuits are household or similar appliance
CAT II
power circuits, which may carry medium-level transient
voltage surge.
Example: household appliance and portable tool power
supplies
CAT III : CAT III circuits are high-power appliance power
circuits, which may carry high-level transient voltage
surges.
Example: industrial machinery or instrument power
supplies
CAT IV : CAT IV circuits are circuits which can carry very
substantial transient -voltage surges.
Example: power feeders
For safety reasons, you should only use leads that comply with
the IEC 61010 standard.
Before using, always check that they are in perfect working
order.
1.1.2. When using the instrument
• Never exceed the protection limit values indicated in the
specifications for each type of measurement.
• When the multimeter clamp is linked to the measurement
circuits, do not touch any unused terminals.
• Before changing the function, disconnect the measure-
ment leads from the circuit measured.
• Never measure resistances on a live circuit.
1.1.3. Symbols
Refer to the user's manual
Risk of electric shock
Double insulation
MX 650 / MX 655
17
Chapter II
1.1.4. Instructions
• Before opening the instrument, disconnect it from the
measuring circuits and make sure that you are not charged
with static electricity, which could irreparably damage the
instrument's internal elements.
• A "qualified person" is someone who is familiar with
the installation, the construction, the application and the
dangers at hand. This person is authorised to power up and
power down the installation and equipment, in compliance with
safety regulations.
1.1.5. Cleaning
Turn off the power supply. Clean with a damp cloth and soap.
Never use abrasive products or solvents.
1.2. Warranty
This equipment is guaranteed against any material or
manufacturing defects, in accordance with the general
conditions of sale.
During the warranty period (1 year), the instrument can only be
repaired by the manufacturer, who reserves the right to repair
the instrument or to exchange all or part of it. If the equipment
is returned to the manufacturer, the outgoing transport costs
are borne by the customer.
The warranty is not applicable in the following cases:
1. improper use of the equipment or use of it in conjunction
with incompatible equipment;
2. modifications to the equipment without the explicit
authorisation of the manufacturer's technical department;
3. work carried out on the instrument by a person not
approved by the manufacturer;
4. adaptation for a specific application, not included in the
definition of the equipment or the user's manual
5. knocks, falls or flooding.
The contents of this manual must not be reproduced in any
form without our consent.
1.3. Maintenance
Return your instrument to your distributor for any work to be
done within or outside the guarantee.
1.4. Unpacking - Repacking
All the equipment was checked mechanically and electronically
before shipment. Every precaution was taken to ensure that
you receive the instrument undamaged. It is a good idea to
check quickly to detect any damage that may have occurred
during transport. If there is any damage, immediately notify the
transporter of the customary reservations.
Caution! If you ship this instrument on elsewhere,
use preferably the original packaging and indicate the
reasons for reshipment as clearly as possible in a note
enclosed with the equipment.
18
MX 650 / MX 655
Chapter II
2. DESCRIPTION OF THE INSTRUMENT
2.1. Description of front and rear
1
600
1000
PEAK
1mS
2
3
6
HOLD
V
V
A
40
Hz
MINMAX
REL
RANGE
9
750
600
1000
10
600V
1
600 1000
4
5
2
3
7
a b
8
6
PEAK
1mS
HOLD
A
1000
V
400
40
Hz
RELMIN
MAX
9
750
600
1000
11
10
600
4
5
7
8
11
1 Jaws
2 Trigger
3 Selector switch
4 HOLD button
5 PEAK button
6 MIN / MAX button
IEC 1010
600V CAT III
POLLUTION
WARNING
TO AVOID ELECTRIC
SHOCK REMOVE ALL
INPUTS BEFORE
OPENING THE CASE.
9V BAT
NEDA 1604 6F 22 006P
PLEASE READ
MANUAL FOR SAFET
DEGREE 2
TERY
Y
7a RANGE button
7b AC/DC button
8
∆REL button
9 Display
10 COM input terminal
11 + input terminal
12 Battery housing
12
MX 650 / MX 655
19
Chapter II
Zero function and
2.2. Description of the display
MX
650
MX
655
MAX
MIN
Positive peak
Negative peak
Resistance measurement
Voltage measurement
Current measurement
Frequency measurement
relative measurement
K
Auto cut-off
Max. value
Min. value
Continuity test
Diode test
Manual range
Bargraph
Batteries down
Direct current
Negative value
Alternating current
Hold
Kilo
20
MX 650 / MX 655
Chapter II
3. GENERAL DESCRIPTION
3.1. Battery installation and replacement
1.
2. Before changing the batteries, position the switch to
3. Using a Phillips screwdriver, loosen the 2 screws holding
4. Replace the old battery with a new 9V battery, ensuring
5. Put the battery flap back in place and tighten the fixing
3.2. Zero function and relative measurement
This function is used to perform RCD measurements (in A, V
or Ω) by recording a "calibration value" which is subtracted
from the measurements.
To activate this function, press on the ∆∆∆∆REL button (the "
symbol is displayed).
The last value measured becomes the reference value which
will be subtracted from any subsequent measurements.
To display the reference value, press again on the ∆∆∆∆REL
button (the value is displayed and the " " symbol flashes).
To quit this function, press the zero button for 2 seconds.
3.3. Memory
It is possible to freeze the value displayed by pressing on the
"HOLD" button. To deactivate this function, press the "HOLD"
button a second time.
displayed when the voltage supplied by the
batteries is lower than the operating voltage.
"OFF", unplug the measurement leads and disconnect
the clamp from the circuit being measured .
the back of the case in place.
that the polarity is respected.
screws.
"
3.4. Automatic range
MX 650 and MX 655 multimeter clamps have automatic range
selection (Autorange).
On the MX 650 model, the range change can be "forced"
manually by holding the RANGE button down (the
manual range symbol appears).
The user can then choose the position of the decimal point
with short presses on the RANGE button.
To quit manual range, you must hold the RANGE button down
for at least 2 seconds; the clamp then returns to automatic
range selection mode.
3.5. Auto cut-off
The clamp shuts down automatically after 30 minutes if no
operations are performed ( symbol is displayed).
To deactivate this function, press and hold down the ∆∆∆∆REL
button. Then, switch the clamp on using the selector switch.
Release the button when a buzzing signal confirms the
manoeuvre (the symbol is no longer displayed).
MX 650 / MX 655
21
Chapter II
230.0V
3.6. PEAK function (1 ms)
This function enables 1 ms voltage or current PEAK signals to
be captured.
Before a signal is captured, the clamp must first be calibrated
by holding the PEAK button down for more than 2 seconds,
until "CAL" is displayed, indicating that the offset has been
correctly taken into account.
Choose the positive or negative sign of the peak (P+ or P-)
with short presses on the PEAK button.
To quit the manual range, you must hold the RANGE (MX 650)
or the / (MX 655) button down for at least 2 seconds; the
clamp then returns to normal mode.
3.7. MAX MIN function (500 ms)
To activate the MAX MIN function, press on the MAX MIN
button. The MAX value is then displayed.
If you press on the button again, the MIN value will be
displayed.
If you press on the button a third time, the instantaneous
measurement is displayed (however, the "MAX MIN" symbol
flashes, indicating that the function is still active).
To quit the manual range, you must hold the MAX MIN button
down for at least 2 seconds; the clamp then returns to normal
mode.
4. FUNCTIONAL DESCRIPTION
4.1. Measuring AC voltage
• (MX 650) Position the switch
to V.
• (MX 655) Position the switch
to V. The symbol
(alternating signal) should be
displayed. If not, press on the
600
1000
PEAK
1mS
HOLD
A
V
1000
400
40
Hz
REL
750
600
1000
600V
/ button, to make it
appear.
Connect the red test lead to the
"+" input terminal and the black
test lead to the "COM" input
terminal.
Then place the touch prods in
contact with the points where
the AC voltage is to be
measured.
Then read the result on the
display.
22
MX 650 / MX 655
Chapter II
(MX 650) Set the switch to
(MX 655) Set the switch to
button to
symbol (direct
the "+" input terminal and the
4.2. DC voltage measurement
600
1000
PEAK
1mS
HOLD
A
1000
V
400
40
Hz
REL
750
600
1000
600V
4.3. Measuring AC current
6
0
0
P
E
A
1
m
K
S
A
1
4
0
0
0
0
0
4
1
0
0
0
0
H
V
O
L
D
H
z
R
E
L
6
0
0
6
0
0
V
7
1
5
0
0
0
0
•
V.
•
V.
Press on the /
display the
signal).
Connect the red test lead to
black test lead to the "COM"
input terminal.
Then place the touch prods
in contact with the points
where the DC voltage is to
be measured.
Then read the result on the
display.
• (MX 650) Set the switch to A (corresponding to the 1000
A~ and 400 A~ automatic calibres).
• (MX 655) Set the switch to 1000 A . The symbol
(alternating signal) should be displayed. If not, press on the
/ button, to make it appear.
Open the clamp jaws by pressing the trigger. Position the
clamp around the conductor to be measured.
Release the trigger. Check the clamp is properly closed. Read
the result of the measurement on the display.
If reading is difficult, press the HOLD button and read the
result afterwards.
If necessary, for better resolution you can move to a lower
range by means of the selector switch.
Note: For safety reasons, disconnect the measuring leads
before measuring current. The clamp should encircle only one
conductor, otherwise the measurement result may be
incorrect. The best measurement is obtained with the
conductor centred in the middle of the jaws.
MX 650 / MX 655
23
4.4. Measurement of direct current (MX 655 only)
automatically reset the DC zero.
Then follow the same procedure
Place the touch prods in contact
Set the switch to 1000 A .
Press on the / button to
display the symbol (direct
signal).
Once the display is stabilised,
press on the ∆∆∆∆REL button to
1000
600
PEAK
1mS
HOLD
A
400
40
MAXMIN
1000
12.00
600
600
as for measuring alternating
V
current.
Hz
See previous §.
REL
Note: The correct connection
direction to obtain a positive
750
value is indicated on the right-
1000
hand jaw.
4.5. Measuring resistance
Set the switch to Ω.
Connect the red test lead to the
"+" input terminal and the black
test lead to the "COM" input
terminal.
with the points to be measured
and read the result on the
display.
Note: Always ensure that the
circuit is disconnected from the
power supply before measuring
40
PEAK
1mS
A
400
600 1000
1000
HOLD
V
Hz
REL
resistance!
750
600
1000
600V
To measure low resistances, it
is preferable to offset the
resistance of the measurement
leads.
To do this, short-circuit the lead
touch prods then press the
∆∆∆∆
REL button before taking the
measurements.
Chapter II
24
MX 650 / MX 655
Chapter II
4.6. Continuity test with buzzer
600
CATV III 1000A
PEAK
1mS
HOLD
A
1000
V
400
40
Hz
REL
V
750
CATV600 III
V1000
600V
600
V III 1000A
CAT
PEAK
1mS
HOLD
A
1000
V
400
40
Hz
REL
V
750
CATV600 III
V1000
600V
Set the switch to .
Connect the red test lead to the "+" terminal and the black to
the "COM" terminal.
Put the touch prods into contact with the circuit to be tested.
If the resistance is less than R < 75 Ω ± 25 Ω, the buzzer will
make a continuous sound.
Note : Always ensure that the circuit is disconnected from the
power supply before measuring continuity! To offset lead
resistance, short circuit the lead touch prods, then press on the
∆∆∆∆
REL button.
4.7. Diode test
et the switch to
S
.
Connect the red test lead to
the "+" terminal and the
black test lead to the "COM"
terminal.
Put the red touch prod into
600
IIIV CAT A1000
PEAK
1mS
HOLD
A
V
1000
400
40
Hz
REL
V
750
CATV600 III
V
1000
600V
contact with the diode anode
and the black prod into
contact with the cathode.
Read the value of its
threshold voltage off the
display.
Note: Always ensure that
the circuit is disconnected
from the power supply
before testing diodes! If the
connection is made back to
front, the display indicates
"OL" (Overload); this
enables the user to
distinguish the anode from
the cathode.
MX 650 / MX 655
25
4.8. Measurement of the voltage frequency
Open the clamp by pressing the
disconnect the clamp measuring
Set the switch to "Hz".
Connect the red test lead to
the "+" terminal and the black
test lead to the "COM"
terminal.
Place the touch prods in
contact with the points whose
frequency is to be measured.
A
400
40
600 1000
PEAK
1mS
1000
HOLD
V
Hz
REL
Read the result on the display.
750
600
1000
600V
4
.9. Measurement of the current frequency
Set the switch to "Hz".
trigger.
Encircle the conductor and
close the jaws correctly by
releasing the trigger.
40
600 1000
PEAK
1mS
A
400
1000
V
Read the result on the display.
HOLD
Note: For safety reasons,
Hz
leads before measuring current
REL
frequency. The clamp should
encircle only one conductor,
otherwise the measurement
750
600
1000
600V
result may be incorrect.
Chapter II
Note: To measure frequency, either the input terminals
(voltage) or the clamp jaws (current) can be used, but the
two sources should never be used at the same time.
26
MX 650 / MX 655
Chapter II
5. TECHNICAL SPECIFICATIONS
5.1. General
Only the values assigned tolerances or the limits declared
constitute guaranteed values. The values without any
tolerance are given as indications.
The symbol is displayed when input signal exceeds
measuring limit in 40 A~ (MX 650), 40 and 400 A~ (MX 655),
resistance and continuity range.
In voltage, current and frequency range, this symbol will not be
shown even the read reach the measuring limit of :
750 VAC, 1000 VDC, 1000 AAC/DC, 10 Hz.
5.2. Characteristics
Accuracy is to within ± [% of the reading (L) + number of
counts (ct)] in the reference conditions indicated in the
appendix.
(MX 655) When measuring U rms and I rms, add ± 1% L
additional error margin, from 5% to 50% of the range for a
maximum peak factor of 6, and from 5% to 100% of the range
for a peak factor of between 1.4 and 3.
Over and above these limits, accuracy is not specified.
5.2.1. Direct voltage (automatic ranges)
(MX 650)
Range Meas. range Resolution Accuracy
400 V 0.2 to 399.9 V 0.1 V 0.75% L + 2 ct
1000 V 400 to 1000 V 1 V 0.75% L + 2 ct
Protection against overloads: 1000 Vrms
(MX 655)
Range Meas. range Resolution Accuracy
400 V 0.2 to 399.9 V 0.1 V 1% L + 2 ct
1000 V 400 to 1000 V 1 V 1% L + 2 ct
Protection against overloads: 1000 Vrms
5.2.2. Alternating voltage (automatic ranges)
(MX 650)
Range Meas. range Frequency Resol. Accuracy
400 V 0.5 to 399.9 V 50…500 Hz
750 V 400 to 750 V 50...500 Hz
500…1000 Hz
500…1000 Hz
0.1 V 1.2% L + 5 ct
1.5% L + 5 ct
1 V 1.2% L + 5 ct
1.5% L + 5 ct
Input impedance: 10 MΩ
Protection against overloads: 1000 Vrms
(MX 655)
Range Meas. range Frequency Resol. Accuracy
400 V 0.5 to 399.9 V 50…500 Hz
750 V 400 to 750 V 50...500 Hz
500…1000 Hz
500…1000 Hz
0.1 V 1.5% L + 5 ct
1.8% L + 5 ct
1 V 1.5% L + 5 ct
1.8% L + 5 ct
Input impedance: 10 MΩ
Protection against overloads: 1000 Vrms
5.2.3. Direct current (MX 655 only)
Range Meas. range Resolution Accuracy
40 A 0.10 to 39.99 A 0.01 A 2.5% L + 10 ct
400 A 40.0 to 400.0 A 0.1 A 2.5% L + 10 ct
1000 A 400 to 1000 A 1 A 2.5% L + 10 ct
Protection against overloads: 1200 ARMS
MX 650 / MX 655
27
Chapter II
5.2.4. Alternating current
(MX 650 automatic ranges)
Range Meas. range Frequency Resol. Accuracy
40 A 0.05 to 39.99 A 50…500 Hz
400 A 40.0 to 400.0 A 50…500 Hz
1000 A 400 to 1000 A 50…500 Hz
500…1000 Hz
500…1000 Hz
500…1000 Hz
0.01 A
0.1 A
1 A
1.9% L + 5 ct
3% L + 5 ct
1.9% L + 5 ct
3% L + 5 ct
1.9% L + 5 ct
3% L + 5 ct
Protection against overloads: 1000 ARMS
(in 40 A range) and 1500 Arms (in 400 A and 1000 A ranges)
(MX 655)
Range Meas. range Frequency Resol. Accuracy
40 A 0.05 to 39.99 A 50...60 Hz
400 A* 40.0 to 400.0 A 50…60 Hz
1000 A* 400 to 1000 A 50…60 Hz
60...500 Hz
500…1000 Hz
60…500 Hz
500…1000 Hz
60…500 Hz
500…1000 Hz
0.01 A
0.1 A
1 A
1.9% L + 5 ct
2.5% L + 5 ct
3.5% L + 5 ct
1.9% L + 5 ct
2.5% L + 5 ct
3.5% L + 5 ct
1.9% L + 5 ct
2.5% L + 5 ct
3.5% L + 5
ct
Protection against overloads: 1200 ARMS
*Position A on the switch corresponds to the two automatic
calibres, 400 A~ and 1000 A~.
5.2.5. Resistance (ΩΩΩΩ) (automatic ranges)
Range Meas. range Resolution Accuracy
400 Ω 0.2 to 399.9 Ω 0,1 Ω 1%L + 3 ct
4000 Ω 400 to 4000 Ω 1 Ω 1%L + 2 ct
Protection against overloads: 600 Vrms
Continuity detection threshold: R < 75 Ω ± 25 Ω.
5.2.6. Diode
Test current Open circuit voltage
MX 650
MX 655
0.6 mA max .3 V
max 1.7 mA max 6 V
Protection against overloads: 600 Vrms
5.2.7. Frequency Hz (automatic ranges)
• For current
Range Meas. range Resol. Accuracy Sensitivity
4000 Hz 20 to 3999 Hz 1 Hz 0.1% L + 1 ct 2 ARMS
10 kHz 4 to 10 kHz 10 Hz 0.1% L + 1 ct 5 ARMS
• For voltage
Range Meas. range Resol. Accuracy Sensitivity
4000 Hz 10 to 3999 Hz 1 Hz 0.1% L + 1 ct 5 Vrms
10 kHz 4.00 to 10.00 kHz 10 Hz 0.1% L + 1 ct 10 Vrms
5.3. Safety
IEC 61010-1 Ed.95 and IEC 61010-2-032 Ed.93:
- Insulation: class II
- Pollution level: 2
- Altitude: < 2000 m
- Installation category: CAT III 600 V
28
MX 650 / MX 655
Chapter II
5.4. General information
Digital display
3 ¾ digit LCD with max. reading of 3,999 counts
Analogue display
42-segment bargraph
Polarity
When a negative signal is applied, the signal appears.
Low battery indicator
is displayed when the voltage supplied by the batteries is
lower than the operating voltage. Measurements are no longer
guaranteed.
Power supply
Battery: 9 V, NEDA 1604, 6F22, 006P or alkaline
Typical autonomy: 180 hours (MX 650)
with alkaline battery and without buzzer function.
Protection level of the housing
IP30 according to NF EN 60529 Ed. 92
Maximum jaw opening
MX 650: ∅ 36 mm
MX 655: ∅ 40 mm
Dimensions
246 x 93 x 43 mm
Weight
400 g (with battery)
5.5. Environmental conditions
5.5.1. Temperature
Operation: 0°C to 40°C, < 70 % RH
Storage: -10°C to 60°C, < 80 % RH
5.5.2. E.M.C.
Immunity: acc. to EN 61326 + A1 (1998)
Emission: acc. to EN 61326 + A1 (1998)
5.6. Delivery configuration
Instrument delivered with:
1 set of measuring leads (one black, one red)
1 x 9 V alkaline battery
1 carrying case
1 user's manual
1 verification certificate
36 hours (MX 655)
APPENDIX:
Sine signal:
- Frequency from 48 to 65 Hz
- No continuous components
Temperature 23°C ± 5°C
External magnetic field < 40 A/m
No alternating magnetic field
Measured conductor centred (in A)
MX 650 / MX 655
Reference conditions
29
METRIX
Parc des Glaisins
6, avenue du pré de Challes
B. P. 330
F - 74943 ANNECY-LE-VIEUX
Tel. +33 04.50.64.22.22 - FAX +33 04.50.64.22.00
Copyright ©
X02027A00 - Ed. 04 - 09/09
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