Chauvin Arnoux C.A 755 User manual

GB- User’s manual
SE - Bruksanvisning
FI - Käyttöohjeet
Digital tester
Spänningsprovare
Digitaalinen testeri
C.A 755
600 V
CAT III
1000 V max
+
COM
DIGITAL TESTER
Select
C.A 755
600 V CAT III

2
WARNING, risk of DANGER! The operator must
refer to these instructions whenever this danger
symbol appears.
Equipment protected by double insulation.
Battery. Earth.
Important information.
The product is declared recyclable following
an analysis of the life cycle in accordance with
standard ISO14040.
Chauvin Arnoux has adopted an Eco-Design
approach in order to design this appliance.
Analysis of the complete lifecycle has enabled us
to control and optimize the effects of the product
on the environment. In particular this appliance
exceeds regulation requirements with respect to
recycling and reuse.
The CE marking indicates conformity with
European directives, in particular LVD and EMC.
The rubbish bin with a line through it indicates
that, in the European Union, the product must
undergo selective disposal in compliance with
Directive WEEE 2002/96/EC. This equipment
must not be treated as household waste.
ENGLISH
Thank you for purchasing this C.A 755 digital tester.
For best results from your instrument:
read these operating instructions carefully,
comply with the precautions for use.
Denition of measurement categories:
Measurement category IV corresponds to measurements
taken at the source of low-voltage installations.
Example: power feeders, counters and protection devices.
Measurement category III corresponds to measurements
on building installations.
Example: distribution panel, circuit-breakers, machines or
xed industrial devices
Measurement category II corresponds to measurements tak-
en on circuits directly connected to low-voltage installations.
Example: power supply to electro-domestic devices and
portable tools.
Svenska ............................................. 16
Suomi ................................................ 30

3
PRECAUTIONS FOR USE
This instrument is compliant with safety standard IEC 61010-
2-030, and the leads are compliant with IEC 61010-031, for
voltages up to 600V in measurement category III.
Failure to observe the safety instructions may result in electric
shock, re, explosion, and destruction of the instrument and
of the installations.
The operator and/or the responsible authority must carefully
read and clearly understand the various precautions to be
taken in use. Sound knowledge and a keen awareness of
electrical hazards are essential when using this instrument.
Do not use your instrument on networks of which the voltage
or category exceeds those stated.
Do not use the instrument if it seems to be damaged,
incomplete, or poorly closed.
Do not use the instrument in an explosive atmosphere or in
the presence of ammable gases or vapours.
Before each use, check the condition of the insulation on
the leads, housing, and accessories. Any item of which the
insulation is deteriorated (even partially) must be set aside
for repair or scrapping.
Use only the leads and accessories supplied. The use of
leads (or accessories) of a lower voltage rating or category
limits the use of the combined instrument + leads (or acces-
sories) to the lowest category and service voltage.
Use personal protection equipment systematically.
When handling the instrument and test probes, keep your
ngers behind the physical guard.
All troubleshooting and metrological checks must be done
by competent, accredited personnel.

4
CONTENTS
1. PRESENTATION...........................................................5
1.1. Delivery condition.............................................5
1.2. Accessories and spare parts ............................5
1.3. Inserting the batteries.......................................5
1.4. View of the C.A 755..........................................6
1.5. Back .................................................................7
2. USE ...............................................................................8
2.1. Instrument test..................................................8
2.2. Voltage .............................................................8
2.3. Resistance, continuity, diode and capacitance ..9
2.4. Non-contact voltage detection (NCV).............10
2.5. Automatic standby.......................................... 11
3. CHARACTERISTICS ..................................................12
3.1. Reference conditions......................................12
3.2. Electrical characteristics.................................12
3.3. Environmental conditions ...............................13
3.4. Power supply..................................................13
3.5. Characteristics of construction .......................14
3.6. Electrical safety ..............................................14
3.7. Electromagnetic compatibility.........................14
4. MAINTENANCE..........................................................15
4.1. Cleaning .........................................................15
4.2. Replacement of batteries ...............................15
5. WARRANTY................................................................15

5
1. PRESENTATION
1.1. DELIVERY CONDITION
C.A 755 digital tester
Delivered in a cardboard box with:
one red test probe 2 mm in diameter,
a black lead terminated by a removable black probe tip
2mm in diameter,
two alkaline batteries (AAA or LR3),
one user’s manual in ve languages,
a test certicate.
1.2. ACCESSORIES AND SPARE PARTS
Test probes 2mm in diameter and
4mm long (one red and one black)
600V CAT III
Test probes 2mm in diameter and
15mm long (one red and one black)
300V CAT II
Test probes 4mm in diameter and
19mm long (one red and one black)
300V CAT II
Carrying bag
LR3 or AAA batteries
C.A 753 2P+T adapter.
For the accessories and spares, consult our web site:
www.chauvin-arnoux.com
1.3. INSERTING THE BATTERIES
Use a screwdriver to unscrew the battery compartment cap.
+
Insert the two batteries provided (AAA
or LR3 1.5V alkaline batteries).
Screw the battery compartment cap
all the way back in and make sure that
it is completely and correctly closed.

6
Removable black probe. Removable red probe.
Backlit LCD display
unit.
Battery compartment
cap.
Key Select.
1.4. VIEW OF THE C.A 755
+ terminal.
Guards.
Four-position rotary
switch.
COM terminal.
Lead terminated by a
probe tip holder.
600 V
CAT III
1000 V max
+
COM
DIGITAL TESTER
Select
C.A 755
600 V CAT III

7
1.5. BACK
When the instrument is not being used, the probe tips can be
stored on the back of the instrument.
You can also wrap the lead around the instrument.

8
2. USE
This instrument is a digital tester. It measures AC and DC
voltages, resistances, and capacitances. It also has a conti-
nuity function and a diode function and can be used for non
contact voltage detection.
2.1. INSTRUMENT TEST
Before making any measurements, test all of the functions
of the instrument.
To switch the instrument on, turn the switch to any position.
All segments of the display unit light and the instrument
emits a continuous beep.
SCAN
If the battery voltage is too low for correct operation of the
instrument, the symbol is displayed.
If the battery voltage is much too low, the display unit
will not light.
In both cases, it is time to replace the batteries (see § 4.2).
With the inputs disconnected, set the switch to Ω. The
display unit indicates - - - -.
Connect the red probe tip to the +terminal and the black
probe tip to the COM terminal. Bring the two probe tips
together, so that they touch. The instrument indicates a
resistance near zero and emits a continuous beep.
Set the switch to Vand measure a known voltage.
If the results of these four tests are correct, your instrument
is ready for use.
2.2. VOLTAGE
Connect the red probe tip to the +terminal and the black
probe tip to the COM terminal.
Set the switch to V.
Keep your hands behind the guards of the device and of
the test probe.
+
COM
Select
Position beyond which your hands must not go.
Place the test probes on the element to be tested and
maintain a rm contact.

9
If the voltage is > 30V, the instrument displays , indicating
that the voltage is dangerous.
As default, the instrument is in automatic mode (
SCAN
). If the
voltage is AC, the instrument displays AC. If the voltage is
DC, it indicates DC and displays its polarity.
The Select key is used to exit from the automatic mode (the
SCAN
symbol disappears) and display the AC voltage only, or
the DC voltage only, or to return to the automatic mode.
To determine the type of voltage (AC or DC) for a measure-
ment < 1V, exit from the automatic mode.
Do not use the C.A 755 to check for the absence of a
voltage. For that, use a VAT.
2.3. RESISTANCE, CONTINUITY, DIODE AND
CAPACITANCE
Connect the red probe tip to the +terminal and the black
probe tip to the COM terminal.
Set the switch to Ω.
Keep your hands behind the guards of the device and of
the test probe.
Place the test probes on the element to be tested. If a
voltage is present, the instrument so indicates.
The voltage is displayed.
SCAN
+
COM
Select
R
Do not make a resistance, diode, continuity, or capac-
itance measurement on a live circuit.
As default, the instrument is in automatic mode (
SCAN
) and
chooses automatically among the resistance , continui-
ty , diode , and capacitance functions. To force
one of these functions, press the Select key (the
SCAN
symbol disappears).

10
Resistance and continuity
If the resistance is less than 300 Ω, the instrument is in
continuity.
SCAN
Below 30 Ω, it emits a continuous beep.
Between 300 Ωand 3 MΩ, the instrument is in resistance
mode. Above 3 MΩ, the display unit indicates OL. The 30 MΩ
range is not available in automatic mode; resistance mode
must be used.
Diode
In diode test, place the red probe tip on the anode of the
diode to be tested and the black probe tip on the cathode.
The instrument indicates the voltage of the diode. If it
is above 2V or if the polarity is reversed, the instrument
displays - - - -.
Capacitance
The 3mF and 30mF ranges are not available in automatic
mode; capacitance mode must be used.
If the device displays dis.C after a measurement, wait for
the end of automatic discharging of the capacitance before
making another measurement.
2.4. NON-CONTACT VOLTAGE DETECTION
(NCV)
The instrument can detect an AC voltage of approximately
230V.
Withdraw the probe tips.
Set the switch to NCV.
Move the top of the instrument (+ terminal side) close
to the conductor without touching it. The position of the
instrument may affect the result. The sensitivity is better
on the battery compartment cap side.
+
COM
Select
If no alternating voltage is detected, the device displays EF.
If a voltage is detected, the device displays one of 4 detec-
tion levels:
- , the buzzer beeps once a second and the backlighting
ashes at the same rate.
- - , the buzzer beeps twice a second and the backlighting
ashes at the same rate.