Amprobe AC50A User manual

User Manual
• Bedienungshandbuch
• Mode d’emploi
• Manuale d’Uso
• Manual de uso
• Bruksanvisning
AC50A
Leakage Clamp Meter

Contents
Introduction............................................................................. 2
Contents ................................................................................. 3
Transport and Storage ............................................................ 3
Safety...... ................................................................................. 3
Appropriate Usage ................................................................. 4
Feature Diagram............................................................ 4
Operation ...................................................................... 5
Preparation and safety measures ........................................... 5
Current Measurements ................................................. 6
Voltage Measurements................................................. 7
Resistance Measurements / Continuity......................... 8
MIN/MAX and peak values/ Auto Power Off ............... 8
Maintenance............................................................................ 9
Changing the battery.............................................................. 9
Calibration Interval ................................................................. 10
Specifications .......................................................................... 10
Warranty ................................................................................. 11
Repair....................................................................................... 11
1
AC50A Current Clamp Meter
Users Manual

2
References marked on instrument or in users manual
The users manual contains information and references, necessary for
safe operation and maintenance of the instrument. Prior to using the
instrument the user is kindly requested to thoroughly read the users
manual and comply with it in all sections.
Failure to read the users manual or to comply with the warnings and
references contained herein can result in serious bodily injury or ins-
trument damage
Introduction
The Amprobe AC50A is a universal, multi-purpose electrical measuring
instrument. It comply with the standards DIN VDE 0411 and EN 61010,
and provide safe, reliable operation. The Currenet Clamp is a valuable
tool for all sorts of measurements in both trade and industry.
• 3 3/4 digit liquid-crystal display
• manual range selection for current, voltage, resistance measurements
• Clamp opening 30 mm (1/2 inch)
• Switches off automatically
• Integral memory for readings
• Evaluates MIN/MAX values
• Zero-setting
• relative value function
The Amprobe Current Clamp AC50A is supplied complete with leads. After
unpacking, check that the instrument is complete, and that all accessories
are present.
Warning of a potential
danger, comply with users
manual.
Equipment protected
throughout by double
insulation or reinforced
insulation.


Caution! Dangerous vol-
tage. Danger of electrical
shock.
Caution: Risk of Electric
Shock
Conformity symbol,
the instrument com-
plies with the valid
directives. It complies
with the EMC Directive
(89/336/EEC) and the
Low Voltage Directive
(73/23/EEC) with their
valid standards.
Reference. Please use ut-
most attention. Symbol for the mar- king of electrical and
electronic equipment
(WEEE Directive
2002/96/EC).

Contents:
1 pce. Amprobe Current Clamp AC50A
2 pce. test leads with probes (red/black)
2 pce. batteries 1,5V IEC LR6
1 pce. Carrying Case
1 pce. users manual
Transport and Storage
• Please keep the original packaging for later transport, e.g. for calibra-
tion. Any transport damage due to faulty packaging will be excluded
from warranty claims.
• In order to avoid instrument damage, it is advised to remove batteries
when not using the instrument over a certain time period. However,
should the instrument be contaminated by leaking battery cells,
you are kindly requested to return it to the factory for cleaning and
inspection.
• Instruments must be stored in dry and closed areas. In the case of an
instrumentbeingtransportedinextremetemperatures,arecoverytime
of minimum 2 hours is required prior to instrument operation.
Safety
• The Amprobe Current Clamp AC50A has been manufactured and
tested to comply with the safety regulations for electronic measuring
equipment contained in IEC61010 and EN 61010, and left the factory
in a safe condition. To maintain this condition, the user must observe
the safety instructions contained in this users manual.
• Toavoidelectricshock,safetymeasuresmustbeobservedwhenworking
with voltages higher than 60V d.c. or 30 V r.m.s.(42.4 V peak).
• Before each measurement make sure that the test leads and the ins-
trument are undamaged.
• Onlyhandletestleadsandprobesonthegripsprovided.Avoidtouching
probes under any circumstances.
• Measurementsindangerousproximityofelectricalinstallationsareonly
to be executed when instructed by a responsible electrical specialist,
and never alone.
• The relevant safety regulationsforelectrical plant andequipmentmust
be observed during all operations.
• The instrument must only be used in the specified ranges.
• Before opening the instrument, it must be disconnected from
all circuits.
• Protect the instrument from prolonged exposure to direct
sunlight.
3

Appropriate Usage
• The instrument may only be used under those conditions and for those
purposes for which it was conceived. For this reason, in particular the
safety references, the technical data including environmental condi-
tions and the usage in dry environments must be followed.
• When modifying or changing the instrument, the operational safety
is no longer ensured.
• Theinstrumentmayonlybeopenedbyanauthorisedservicetechnician,
e.g. for fuse replacement.
Feature Diagram
1. Induction coil (clamp)
2. Selector switch, for type of
measurement
3. Data hold button, to memorise
reading
4. MIN/MAX value (page 8)
5. Zero setting / relative value func-
tion. Once this button is pressed,
the current reading shall be set
to zero and be used as a zero re-
ference value for all other subse-
quent measurement.
6. Frequenzy range select switch. At
50/60Hz position, only the low fre-
quencysignalismeasured.AtWide
position, signal from 40 - 1kHz is
measured.
7. Digital display
8. Input socket, for measuring vol-
tage, resistance, continuity tes-
ting
9. Hand-hold area incl. Barrier (9a)
10. Low-battery symbol
11. Zero Point / Relative Value Symbol
12. Hold symbol (Data Hold is active)
13. Min/ Max Symbol
14. Continuity Symbol
15. Analogue Bargraph
4
40
mA 4
A
60
A
40
A
OFF
ZERO
MIN/MAX
HOLD
COM
010203040
600
V
AC
400
mA
1
6
2
3
4
5
7
8
9
9a
10 11 12 13 14
15

Operation
Preparation and safety measures
Installing the battery
Before using the instrument, the battery must be installed. This is carried
out as follows:
1) Separate the instrument from any circuit, and remove the test leads.
2) Open the housing by removing the screw on the rear face.
3) Fit the new batteries (2 type 1.5 V IEC LR6), taking care that the polarity
is correct. Make sure that no wires are trapped between the 2 halves
of the housing, and close it again.
4) The instrument is now ready for use.
• The selector switch must be turned to the desired type of measurement
before the probes are connected to the unit under test (UUT).
• Before switching to a new function, the probes must always be removed
from the UUT.
• Usetheinstrumentonlyincleananddrysurroundings.Dirtandmoisture
reduce the effectiveness of the insulation, with consequent danger of
electric shock, specially when dealing with high voltages.
• Use the instrument only in the specified ranges. Before making
measurements, verify that the instrument is functioning properly, for
example by testing on a known voltage or current. Make sure that the
test leads are undamaged.
5

Current Measurements
If tangible dangerous active parts are present in the plant where you
are making measurements, individual protection equipment (e.g.
suitable covers) must be used.
Always hold the instrument below the handle shroud.
The respective accident prevention regulations established by the
professional associations are to be strictly enforced at all times regarding
tasks executed under voltage or in proximity of parts under voltage.
1) Turn selector switch (2) to the AC current range you need
2) Open the clamp, and close it round the conductor. Make sure that the
clamp properly encircles the conductor, and that there is no air gap
between the jaws. For best measurement results and highest accuracy,
have the conductor placed in center of clamp jaws.
For incorrect measurement, the display equals zero. In compliance with
the Kirchhoff’s current law states the sum of all currents equals zero.
However, this measurement layout in conjunction with a very sensitive
current clamp can be used to measure leakage currents.
6
I
I
OK
OK
OK
I+ (-I) = 0
I
40
mA4
A
60
A
40
A
OFF
ZERO
MIN/MAX
HOLD
COM
010 20 30 40
600
V
AC
400
mA
Kirchhoff

If the display is not visible during measurement, press the “HOLD”
button (3) to retain the display. The clamp can then be removed from
the conductor and the stored value read.
Voltage Measurements
Donotconnectmorethan600VAC/DCtotheinputsockets.Exceeding
these values can endanger the operator, and may result in damage
to the instrument.
Before switching to a new function, disconnect the probes from
the UUT.
Only handle test leads and probes on the grips provided. Avoid tou-
ching the probes under any circumstances.
1) Turn selector switch (2) to 400V
2) Plug the black test lead into the “COM” socket and the red lead into
the “VΩ” socket
3) Connect the probes to the UUT and read the display
If the display is not visible during measurement, press the “HOLD”
button (3) to retain the display. The probes can then be removed from
the conductor and the stored value read.
7
40 mA 4A
60 A
40A
OFF
ZERO
MIN/MAX
HOLD
COM
0 10 20 30 40
600
V
AC
400mA

Resistance Measurements / Continuity
Disconnect the UUT from all sources of supply and check that it is at
zero voltage.
1) Turn selector switch (2) to Ω/
2) Plug the black test lead into the “COM” socket and the red lead into
the “+” socket
3) Connect the probes to the UUT and read the display
If the display is not visible during measurement, press the “HOLD”
button (3) to retain the display. The probes can then be removed from
the conductor and the stored value read.
Continuity: At a resistance less than 40 Ω(< 40 Ω) a signal is audible.
MIN/MAX and peak values/ Auto Power Off
The MIN/MAX button can be used to find either the largest or the smallest
value of a series of measurements. Pressing the MIN/MAX button activates
first the MIN mode, so that the smallest value is selected.
Pressing it a second time changes to MAX mode, for the largest value.
Pressing the button a third time returns the instrument to normal
operation.
8
40
mA 4
A
60
A
40
A
OFF
ZERO
MIN/MAX
HOLD
COM
0 10 20 30 40
600
V
AC
400
mA