Chauvin Arnoux PAC 12 User manual

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FRANCAIS
ENGLISH
DEUTSCH
ITALIANO
ESPANOL
PAC 12
■■
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■PINCE POUR OSCILLOSCOPE
■■
■■
■CLAMP FOR OSCILLOSCOPE
■■
■■
■ZANGENSTROMWANDLER FÜR OSZILLOSKOP
■■
■■
■PINZA PER OSCILLOSCOPIO
■■
■■
■PINZA PARA OSCILOSCOPIOS
Mode d'Emploi
User's Manual
Bedienungsanleitung
Libretto d'Istruzioni
Manual de Instrucciones

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SAFETY PRÉCAUTIONS
■Only use the clamp indoors.
■Do not expose the clamp to running water.
■Do not use the clamp on uninsulated conductors at a voltage of more than 600 V in
relation to the earth.
■FormeasurementsonDCcurrent,checkzerooutput.Adjustifnecessary(see“Operating
procedure ”).
■During measurement, ensure that the conductor is in line with the markings on the jaws
and that the clamp closes correctly.
■Your clamp is supplied with a set of adhesive labels. Choose the label for your language
and stick it to the back of the case.
WARRANTY
Our guarantee is applicable for twelve months after the date on which the equipment is
made available (extract from our General Conditions of Sale, available on request).
TO ORDER
Ref.
Oscilloscope Clamp PAC 12 CVH ........................................................... P01.1200.72
Supplied with a 9 V alkaline battery, a set of labels in 5 languages
to stick to the instrument, and a User Manual.
Spare:
- 9 V alkaline battery (6LF22) ..................................................................... P01.1006.20
Thank you for purchasing a Clamp for oscilloscope. To get the best service from this
instrument:
■read this user’s manual carefully and respect the safety precautions detailed
ENGLISH
Meaning of the symbol
Warning ! Please refer to the User’s Manual before using the instrument.
In this User’s Manual, the instructions preceded by the above symbol, should they not be
carried out as shown, can result in a physical accident or damage the instrument and the
installations.

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SUMMARY
page
1 Presentation ........................................................................................................................................................... 11
2 Description .............................................................................................................................................................. 12
3 Operating procedure ....................................................................................................................................... 12
3.1 Switching on ....................................................................................................................................... 12
3.2 DC zero adjustment ...................................................................................................................... 12
3.3 Measurement ..................................................................................................................................... 12
3.4 Overload indication ........................................................................................................................ 13
3.5 Auto off ................................................................................................................................................... 13
4 Specifications ....................................................................................................................................................... 13
4.1 Reference conditions .................................................................................................................... 13
4.2 Operating conditions ..................................................................................................................... 13
4.3 Metrological specifications ....................................................................................................... 14
- 40 A range (10 mV/A) ............................................................................................................... 14
- 400 A range (1 mV/A) ............................................................................................................... 15
- distortion parameters ................................................................................................................ 15
4.4 Mechanical specifications ......................................................................................................... 15
4.5 Electrical specifications .............................................................................................................. 16
- Operating limits ............................................................................................................................. 16
- Electric shocks ............................................................................................................................... 16
4.6 Electromagnetic compatibility ................................................................................................. 16
5 Maintenance ........................................................................................................................................................... 17
5.1 Replacing the battery ................................................................................................................... 17
5.2 Cleaning ................................................................................................................................................ 17
5.3 Calibration ............................................................................................................................................ 17
5.4 Repair ..................................................................................................................................................... 17
6 Appendix ................................................................................................................................................................... 42
1/ PRESENTATION
The oscilloscope clamp measures DC or AC currents, without opening the circuit they
are flowing in. The current clamp is used as an accessory for multimeters, recorders, etc.
Thisclamp measures DCcurrents up to600 A andAC currents upto 400 Arms (600 Apeak).
It outputs the form and amplitude of the current measured as a voltage image of the primary
current.
The clamp has two ranges, 40 A (sensitivity 10 mV/A) and 400 A (sensitivity 1 mV/A), a
zero adjust push button, auto off feature to economise the battery power supply and two
light indicators, one for faults (over-range / incorrect zero reset), the other for power supply.

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2/ DESCRIPTION
See descriptive diagram at the end of the User Manual.
➀Passage of the conductor
➁Jaws
➂Protective non-slip guard
➃Automatic zero DC button
➄Red fault light (over range / incorrect zero adjustment)
➅Green light indicating correct power supply
➆3-position sliding switch (off / selection of 1 mV/A or 10 mV/A ranges)
➇Hand-held parts
➈Fitted lead 1.5 m
➉BNC plug
3/ OPERATING PROCEDURE
3.1/ SWITCHING ON
Set the sliding switch ➆to the appropriate position, 40 A range (sensitivity 10 mV/A) or 400 A
range (sensitivity 1 mV/A). Correct operation is indicated by a green light ➅indicating that
the battery is in good condition.
After approximately 10 minutes of operation of the clamp without manipulation of the
control buttons, the power supply cuts off automatically (see “ Auto off ” below).
If this green indicator does not come on when the clamp is switched on, or goes out
before it has operated for 10 minutes, it is necessary to replace the battery (see
MAINTENANCE chapter).
3.2/ DC ZERO ADJUSTMENT
Ensure that the jaws of the clamp are correctly closed and that they do not enclose any
conductor. Connect the clamp to your measurement instrument. Press the auto zero
button ➃. The red light ➄comes on for approximately three seconds to indicate that the
instrument is on zero calibration. If zero can not be obtained, this indicator light remains
lit to indicate the fault.
3.3/ MEASUREMENT
After having switched on the clamp, connected it to the measurement instrument on the
appropriate range, and followed the auto zero procedure (see the two paragraphs above),
clamp the conductor to be measured ➀between the jaws of the clamp.
On DC current measurement, ensure that the arrow located on the external edge of
the jaws ➁corresponds to the direction of the current flowing in the conductor
(source ⇒receiver).

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3.4/ OVERLOAD INDICATION
Detection of overload of the range of the clamp is indicated by the red light ➄. This
indicator flashes for a peak current greater than 60 A on the 40 A range (10 mV/A) or
600 A on the 400 A range (1 mV/A).
3.5/ AUTO OFF
The clamp has an Auto Off feature which switches off 10 minutes after the clamp has been
switched on, without the controls being used.
When the clamp is switched off by this automatic function, the switch ➆mustfirstbe set tothe
OFF position before being switched on again.
This function can be overridden by the user when switching on. Simply press the auto zero
button ➃at the same time as setting the switch ➆from the OFF position to the 1 mV/A or
10mV/Aposition.Ifthegreenindicator➅flasheswhilstthezeroresetbuttonisbeing pressed,
this indicates that the auto off function has been inhibited.
4/ SPECIFICATIONS
Ranges input/output ratio measurement extent
AC rms peak max DC
40 A 10 mV/A 0.2...40 A 0.2...60 A 0.4...60 A
400 A 1 mV/A 0.5...400 A 0.5...600 A 0.5...600 A
4.1/ RÉFERENCE CONDITIONS
- Temperature: 18...28°C
- Humidity rate: 20...75% RH
- Battery voltage: 9 V ± 0.1 V
- Position of conductor: centred on the markings of the clamp
- Magnetic field: Earth’s DC field
- Absence of external AC magnetic field
- Absence of electric field
- Measurement for a DC current or an AC sinusoidal current ≤65 Hz
- Impedance of the measurement instrument : ≥1 MΩand ≤100 pF
4.2/ OPERATING CONDITIONS
The instrument must be used in the following conditions to satisfy the safety of the user and
the metrological performance:
- Use indoors
- Working altitude: ≤2000 m
- Transportation altitude: ≤12 000 m
- Environmental conditions: see graph below

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0
10
20
30
40
50
60
70
80
90
-50-40-30-20-100 102030405060708090
Stockage Utilisation Réference
▼
°C
▼
% RH Storage Use Reference
Relative humidity
Temperature
4.3/ METROLOGICAL SPECIFICATIONS
All the errors are indicated as a % of Vs (value of the output voltage)
- Output impedance: 100 Ω
- Zero adjustment: ± 10 A by automatic step from 25 to 40 mA approx.
40 A range (10 mV/A)
■Intrinsic error in the field of reference
Graphs of typical relative error: see appendix, page 42.
■Phase error (45...65 Hz)
Primary current 0.5...40 A 40...60 A
(on DC only)
Accuracy ≤1.5% + 5 mV ≤1.5%
Primary current 10...20 A 20...40 A
Phase shift ≤3° ≤2,2°
- Rise time from 10 to 90% Vs: ≤100 µs
- Fall time from 90 to 10% Vs: ≤100 µs
- Output noise : from DC...1 kHz ≤8 mV or 0.8 A DC
from DC...5 kHz ≤12 mV or 1.2 A DC
from 0.1 Hz...5 kHz ≤2.0 mV rms or 0.2 A rms

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400 A range (1 mV/A)
■Intrinsic error in the reference range
Graph of typical phase shift as a function of a 50 Hz AC primary current: see appendix,
page 46.
- Rise time from 10 to 90% Vs: ≤70 µs
- Fall time from 90 to 10% Vs: ≤70 µs
- Output noise: from DC...1 kHz ≤1 mV or 1 A peak-peak
from DC...5 kHz ≤1.5 mV or 1.5 A peak-peak
from 1 kHz...5kHz ≤500 µV rms or 0.5 A rms
Distortion parameters
■Maximum distortion of the frequency on the measurement (to be added to the error in the
reference range): from 65 to 440 Hz -1%
from 440 to 2000 Hz -3.5%
from 2 to 10 kHz -3 dB
See graph of response as a function of the frequency, in appendix, page 47.
■Battery voltage: ≤0.1% /V
■Temperature: ≤300 ppm /°C or 0.3% /10°C
■Humidity 10...85% RH at ambient temperature: ≤0.5%
■Position of a conductor of ∅20 mm:from DC...440 Hz < 0.5%
from 440 Hz...1 kHz < 1%
from 1kHz...2 kHz < 3%
from 2kHz...5 kHz < 10%
■Adjacent conductor carrying an AC current 50 Hz, at 23 mm from the clamp: < 10 mA/A
■Distortion of an external field of 400 A/m (50 Hz) on centred cable: < 1.3 A
■Common mode rejection: > 65 dB A/V
■Residual magnetism: < 10 mA/A
4.4/ MECHANICAL SPECIFICATIONS
- Watertightness: IP 30 in accordance with IEC 529
- Clamping diameter: 1 cable ∅30 mm (or 2 cables ∅24 mm)
a busbar of cross section 50 x 10 mm
- Outside dimensions of clamp: 224 x 97 x 44 mm
- Fitted lead: 1.5 m
- Weight: 440 g approx
Primary current 0.5...100 A 100...400 A 400...600 A
(on DC only)
Accuracy ≤1.5% + 1 mV ≤2% ≤2.5%
Graphs of typical relative error: see appendix, page 45.
■Phase error (45...65 Hz)
Primary current 10...300 A 300...400 A
Phase shift ≤2,2° ≤1.5°

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- Drop height: to IEC 68-2-32
- Protection from shocks: 100 g in accordance with IEC 68-2-27
- Vibrations: to IEC 68 - 2 - 6
4.5/ ELECTRICAL SPECIFICATIONS
Power supply: 9 V battery (type 6LR61, 6LF22 or NEDA 1604)
Battery life: approx 50h with an alkaline battery
Operating limits
On DC current: 3000 A permanent
On AC: 1000 A permanent up to 1 kHz
The maximum permitted current (AC) on overload from 1 kHz is defined by the curve shown
in the appendix (page 67) and in accordance with the following formula:
Ip max =
Electric shocks
InstrumentwithdualinsulationorstrengthenedinsulationinaccordancewithIEC1010-2-032.
Betweentheprimary,thesecondaryandthehand-heldpartlocatedbelowtheguard,dielectric
test voltage: 7850 V DC
Maximumcommon mode voltage betweenthe conductor on whichthe measurement is made
and the earth, or the output and the earth:
- 600 V for installations of category III and degree of pollution 2
Installation category and degree of pollution in accordance with IEC 664 and 664A
4.6/ ÉLECTROMAGNÉTIC COMPATIBILITY
Susceptibility in accordance with EN 50082-2 (most severe case) and EN 50082-1:
Electrostatic discharge in accordance with IEC 1000-4-2 (1995):
. test voltages:4 kV level 2 on contact, aptitude criteria B
8 kV level 3 in the air, aptitude criteria B
- Radiated fields in accordance with IEC 1000-4-3 (1995):
. with max distorsion of 5% of the measurement extent: 3 V/m level 2, aptitude criteria A
- Rapid transients in accordance with IEC 1000-4-4 (1995):
. test voltage: 1 kV level 2, aptitude criteria B
- Magnetic fields at the frequency of the network to IEC 1000-4-8 (1995):
. with a max distortion of 0.5 A: 30 A/m 50 Hz level 4, aptitude criteria A
Emissions in accordance with EN 50081-1:
- Conducted and radiated emission to EN 55022 (1994): class B
1000
F (kHz)

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5/ MAINTENANCE
For maintenance, use only specified spare parts. The manufacturer will not be
held responsible for any accident occurring following a repair done other than
by its After Sales Service or approved repairers.
5.1/ REPLACING THE BATTERY
- Completely disconnect the clamp from the circuit to be measured from your oscilloscope.
- Unscrew the tool release screw holding the cover of the battery compartment.
- Replace the 9 V battery (type 6LF22, 6LR61 or NEDA 1604).
- Replace the cover of the battery compartment.
5.2/ CLEANING
Keep the jaw faces and mechanism perfectly clean.
The body of the clamp should be cleaned with a cloth moistened with soapy water.
Rinse with a cloth moistened with clean water.
Never expose the clamp to running water.
5.3/ CALIBRATION
It is essential that all measuring instruments are regularly calibrated.
Forcheckingandcalibrationofyourinstrument,pleasecontactouraccreditedlaboratories(list
on request) or the Chauvin Arnoux subsidiary or Agent in your country.
5.4/ MAINTENANCE
Repairs under or out of guarantee: please return the product to your distributor.