Chauvin Arnoux C.A. 6505 User manual

Megohmmeter
GB - User’s manual
C.A 6505

2
WARNING, risk of DANGER! The operator must refer to this user’s manual whenever this danger symbol appears.
Equipment protected by double insulation.
WARNING! Risk of electric shock. The voltage of the parts identified by this symbol may be ≥120 V
dc
.
For safety reasons, this symbol is displayed when such a voltage is generated.
Earth.
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.
Definition 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 fixed industrial devices.
Measurement category II corresponds to measurements taken on circuits directly connected to low-voltage installations.
Example: power supply to electro-domestic devices and portable tools.
PRECAUTIONS FOR USE
This device is compliant with safety standard IEC 61010-2-030 and the leads are compliant with IEC 61010-031, for voltages up
to 1000 V in category III or 600 V in category IV with respect to earth.
Failure to observe the safety instructions may result in electric shock, fire, 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.
If you use this instrument other than as specified, the protection it provides may be compromised, thereby endangering you.
Do not use the instrument on networks of which the voltage or category exceeds those mentioned.
Do not use the instrument if it seems to be damaged, incomplete, or poorly closed.
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 personal protection equipment systematically.
Use only the accessories delivered with the instrument.
Respect the value and type of the fuse to avoid damaging the instrument and cancelling the warranty.
Set the switch to OFF when the instrument is not in use.
The battery must be charged before metrological tests.
All troubleshooting and metrological checks must be performed by competent and accredited personnel.
Thank you for purchasing a C.A. 6505 megohmmeter.
To obtain the best service from your instrument:
read this user manual carefully,
comply with the precautions for use.

3
CONTENTS
1. FIRST-TIME USE ...................................................................................................................................................................... 4
1.1. Unpacking ...................................................................................................................................................................... 4
1.2. Battery charge................................................................................................................................................................ 4
2. DESCRIPTION.......................................................................................................................................................................... 5
2.1. Functions of the instrument............................................................................................................................................ 6
2.2. Switch............................................................................................................................................................................. 6
2.3. Keys and button ............................................................................................................................................................. 6
2.4. Display............................................................................................................................................................................ 7
3. MEASUREMENT FUNCTIONS................................................................................................................................................ 8
3.1. Voltage measurement..................................................................................................................................................... 8
3.2. Insulation measurement ................................................................................................................................................ 8
3.3. Measurement of the PI ................................................................................................................................................. 10
3.4. Adjustment of the variable test voltage........................................................................................................................ 11
3.5. Adjustment of the maximum test voltage..................................................................................................................... 11
3.6. Error messages ............................................................................................................................................................ 12
4. COMPLEMENTARY FUNCTIONS ......................................................................................................................................... 13
4.1. Adjustments of the PI ................................................................................................................................................... 13
4.2. Serial number ............................................................................................................................................................... 13
4.3. Internal software version .............................................................................................................................................. 14
5. SPECIFICATIONS................................................................................................................................................................... 15
5.1. Reference conditions.................................................................................................................................................... 15
5.2. Characteristics per function ........................................................................................................................................ 15
5.3. Power supply................................................................................................................................................................ 18
5.4. Construction specifications.......................................................................................................................................... 18
5.5. Environmental parameters ........................................................................................................................................... 18
5.6. Compliance with international standards..................................................................................................................... 19
5.7. Variations in operating range........................................................................................................................................ 19
6. MAINTENANCE...................................................................................................................................................................... 20
6.1. Battery recharge ........................................................................................................................................................... 20
6.2. Replacement of the fuse .............................................................................................................................................. 20
6.3. Cleaning ....................................................................................................................................................................... 20
6.4. Storage......................................................................................................................................................................... 20
7. WARRANTY........................................................................................................................................................................... 21
8. GLOSSARY............................................................................................................................................................................. 22
9. DELIVERY CONDITION ......................................................................................................................................................... 23
9.1. Accessories .................................................................................................................................................................. 23
9.2. Replacement parts ....................................................................................................................................................... 23

4
1. FIRST-TIME USE
1.1. UNPACKING
➀
➅
➄
➃
➁
➂
➆
➀One carrying bag.
➁Two 2 m safety leads with a high-voltage plug at each end (one red and one blue).
➂One 2 m guarded safety lead with a high-voltage plug at one end and a high-voltage plug with rear pick-up jack at the
other end (black).
➃One 0.35 m guarded safety lead with a high-voltage plug at one end and a high-voltage plug with rear pick-up jack at
the other end (blue).
➄Three alligator clips (red, blue, and black).
➅One 1.80 m line power cord.
➆One user manuals on CD-ROM (1 file per language).
1.2. BATTERY CHARGE
Before first using, start by fully charging the battery. Charging must be done at between 20 and 30°C.
> 110 Vac
< 240 Vac
50 / 60 Hz
Connect the instrument to line power using the power cord.
Charging takes between 6 and 10 hours, depending on the
battery’s initial charge.

5
2. DESCRIPTION
110-230V
50/60 Hz
20 VA max
C.A 6505
MEGOHMMETER
DISPLAY
FF 0.1A
380V-10kA
5x20mm
START/STOP
(>2s:DAR-PI )
> 2500V
SET Var
SET V.LOCK
Var
50-5000V
5000V
10T
Ω
2500V
10T
Ω
1000V
4T
Ω
500V
2T
Ω
OFF
( )
For calibration only
( 2500V )
1000V CAT III
600V CAT IV
START/STOP

M
Choice of
measurement voltage
or SET positions.
To start the
measurements and
commence the
measurement of the
DAR and of the PI.
DISPLAY
Display of all measurement parameters.
and 
to modify the flashing values in the SET positions (blue).
Battery charge
Protecting fuse
Connection terminals

6
2.1. FUNCTIONS OF THE INSTRUMENT
The C.A 6505 megohmmeter is a portable instrument housed in a rugged field case with lid and operates on either battery or line
power. It makes voltage, insulation, and capacitance measurements.
This instrument contributes to the safety of electrical installations and equipment.
It has many advantages, for example:
automatic voltage measurement,
automatic detection of the presence of an external AC or DC voltage on the terminals, before or during the measurements,
that disables or stops the measurements,
the simplicity of the user interface,
calculation of the PI and of the DAR,
fuse protection of the instrument, with detection of a defective fuse,
operator safety thanks to the automatic discharging of the device tested,
automatic power-down of the instrument to extend battery life,
an indication of the battery charge condition,
a large backlit LCD display unit with many announciators for very easy reading.
2.2. SWITCH
The rotary switch has 8 positions:
OFF instrument powered down.
500 V - 2 TΩinsulation measurement at 500 V, up to 2 TΩ.
1000 V - 4 TΩinsulation measurement at 1000 V, up to 4 TΩ.
2500 V - 10 TΩinsulation measurement at 2500 V, up to 10 TΩ.
5000 V - 10 TΩinsulation measurement at 5000 V, up to 10 TΩ.
Var. 50 - 5000 V insulation measurement with variable test voltage.
SET Var sets the user definable test voltage for the Var. 50 - 5000 V position.
SET V.LOCK sets the user definable maximum test voltage output irrespective of the insulation measurement positions.
2.3. KEYS AND BUTTON
START/STOP This button is pressed to start then stop the measurement.
A long press starts the measurement of the DAR and of the PI.
DISPLAY Before, during or after the measurement, pressing this key displays the various measurement parameters.
This function is available only in the SET positions of the switch. It increments the parameter displayed in
flashing mode.
This function is available only in the SET positions of the switch. It decrements the parameter displayed in
flashing mode.
Keeping the and keys pressed accelerates the rate at which the parameters change.

7
2.4. DISPLAY
µFµA
0.1M
1M
10M
100M
1G
10G
100G
1T
min sec
DAR
PI
V
DC
AC
nA
2.4.1. DIGITAL DISPLAY
The main digital display indicates the values for insulation measurement: resistance, DAR PI, DD or capacity.
The small digital display unit indicates the test voltage applied by the instrument or the voltage measured on the object tested.
During the insulation measurement, it indicates the elapsed time or the test voltage.
2.4.2. BARGRAPH
The bargraph is active during the insulation measurement (0.1 MΩto 1 TΩ). It also serves to indicate the condition of the battery.
2.4.3. SYMBOLS
DAR PI Indicates the result of these measurements.
Indicates that the voltage generated is dangerous, U > 120 VDC.
Indicates the presence of an external voltage.
Indicates the duration of the measurement, or the time remaining in the case of a PI measurement.
Indicates that the battery is low and must be recharged (see § 1.2).
Indicates a flashing.

8
3. MEASUREMENT FUNCTIONS
3.1. VOLTAGE MEASUREMENT
As soon as the switch is set to an insulation measurement position, the instrument automatically measures the presence of any
AC/DC voltage. This voltage is measured at all times and indicated on the small display unit.
The instrument automatically determines AC or DC: the AC measurement is an RMS value1.
If an excessively high external voltage is present on the terminals (> 0.4 Un), pressing the START button has no effect and no
measurements are made. Similarly, if an excessively high spurious voltage (> 0.4 Un) is detected during the measurement, the
measurement is automatically stopped.
3.2. INSULATION MEASUREMENT
Depending on the measurements to be made, there are three ways to connect the instrument.
In all cases, disconnect the device to be tested from the source.
1 : RMS (Root Mean Square): root-mean-square value of the signal, determined by taking the square root of the mean value of
the signal squared.
M
+
-
M
+
-
G
G
-
+
Weak insulation
Connect the red high-voltage lead between earth and the +
terminal of the instrument.
Connect the black high-voltage lead between one phase of
the motor and the - terminal of the instrument.
Strong insulation
For a very high insulation value, connect the small blue high-
voltage lead between the rear earth pick-up jack of the black
lead and the G terminal of the instrument.
This serves to reduce any external influence and obtain a
more stable measurement.
Cable
Connect the red high-voltage lead between the braid
and the + terminal of the instrument.
Connect the black high-voltage lead between the
core and the - terminal of the instrument.
Connect the blue high-voltage lead between the
insulation and the G terminal of the instrument.
The guard serves to eliminate the effect of surface
leakage currents.
Exterior
insulation Braid
Insulation Core

9
Once the connections have been made, choose the
test voltage on the rotary switch.
1000V
4T Ω
OFF
1000V
4T Ω
V
VV
START/STOP

0.1M
1M
10M
100M
1G
10G
100G
1T
V
When powered up, the instrument displays the
condition of the battery,
the test voltage, then the voltage present on the object to be tested.
Press the START/STOP key to start the measurement.
During measurements the instrument will beep every 10 seconds to alert the user that a high voltage is present.
Press the START/STOP key again to stop the measurement. The instrument continues to measure external voltages but the test
result remains displayed on the main display unit.
To ensure your safety, the instrument will automatically discharge the circuit under test, allow for the voltage displayed to fall back
below 25 V before disconnecting the leads.

DISPLAY
Press the DISPLAY key to display:
Before the measurement
(2 presses)
the voltage present on the device to be tested,
the test voltage,
the surface leakage current.
During the measurement
(2 presses)
the test voltage,
the instantaneous insulation resistance value,
the duration of the measurement,
the current flowing in the resistance being measured.
After the measurement
(5 presses)
the voltage present on the device tested,
the insulation resistance value just before the measurement was stopped,
the duration of the measurement,
the test voltage generated during the measurement,
the current that flowed in the resistance measured,
the surface leakage current,
the capacitance.

10
3.3. MEASUREMENT OF THE PI
1000V
4T Ω
OFF
1000V
4T Ω
START/STOP

> 2s
0.1M
1M
10M
100M
1G
10G
100G
1T
min secmin
PI
V
Set the switch to one of the insulation measurement
positions.
Start the measurement by a long press on the START/
STOP key. The long press is acknowledged by an
audible beep.
The measurement starts for a duration of 10 min. A
countdown displays the time remaining. And the measurement stops automatically.
Press the DISPLAY key to display:
Before the measurement
(2 presses)
the voltage present on the device to be tested,
the test voltage,
the leakage current present.
During the measurement
(4 presses)
the measurement time remaining,
the instantaneous insulation resistance value,
the test voltage,
the current flowing in the resistance being measured,
the value of the PI (available at the end of 10 mn),
the value of the DAR (available at the end of one minute).
After the measurement
(6 presses)
the test voltage generated during the measurement,
the PI,
the DAR,
the duration of the measurement,
the insulation resistance value just before the measurement was stopped,
the current that flowed in the resistance measured,
the voltage present on the device being tested,
the capacitance,
the surface leakage current.

DISPLAY
The values of PI and DAR are calculated as follows:
PI = R 10 min / R 1 min (2 values to be recorded during a measurement lasting 10 mn) 1
DAR = R 1 min / R 30 s (2 values to be recorded during a measurement lasting 1 mn)
They are especially useful for monitoring the ageing of the insulation of revolving machines or of very long cables.
On items of this type, the measurement is initially perturbed by spurious currents (capacitive charging current, dielectric absorption
current) that gradually cancel out. To measure the leakage current representative of the insulation accurately, it is therefore
necessary to make measurements of long duration.
2 : For the calculation of the PI, the times of 1 and 10 minutes can be modified by the user, if required, for a particular application.
See § 4.1.

11
The quality of the insulation is a function of the results found.
DAR PI Condition of the insulation
< 1.25 < 1 Inadequate or even
dangerous
< 2
< 1.6 < 4 Good
> 1.6 > 4 Excellent
3.4. ADJUSTMENT OF THE VARIABLE TEST VOLTAGE
This function makes it possible to use test voltages other than the 4 available.
Var
50-5000V
OFF
Var
50-5000V
SET Var
SET Var
OFF
V
V
SET V.LOCK
OFF
SET V.LOCK
V
Set the switch to SET Var. The test voltage flashes.
Change it using the and keys. Then set the switch to Var 50 - 5000 V to make the
measurement.
This value is retained in a non-volatile memory.
3.5. ADJUSTMENT OF THE MAXIMUM TEST VOLTAGE
The user can set a maximum generated voltage to prevent any accidental over-voltage tests being conducted in error.
Set the switch to SET V.LOCK. The maximum test voltage flashes.
Change it using the and keys.
You can then turn the switch to an insulation measurement setting and make measurements.

12
The maximum test voltage value is retained in a non-volatile memory. It will be displayed for a few seconds on selection of an
affected range.
For example, if the maximum voltage is 750 V, it will be applied and displayed on all settings of the switch from 1000 V up.
3.6. ERROR MESSAGES
0.1M
1M
10M
100M
1G
10G
100G
1T
V
V AC
V AC
0.1M
1M
10M
100M
1G
10G
100G
1T
V
The insulation resistance is too low.
Check your connections, the + and - terminals of the instrument may be
short-circuited.
The insulation resistance is outside the measurement range.
Check your connections; one of the terminals of the instrument may be
disconnected, or else the value measured is in fact > 4 TΩ.
The spurious voltage present on the terminals is greater than 25 VAC or 35
Vpeak.
The instrument alerts you but does not prevent making the measurements.
The spurious voltage present on the terminals is too high for a measurement
to be made:
peak spurious V > 0.4 Un
The test voltage, Un, is indicated by the setting of the switch.
Eliminate the spurious voltage and restart the measurement.
Indicates that the protective fuse of the G terminal is defective.
Replace the fuse as indicated in § 6.1.2.

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4. COMPLEMENTARY FUNCTIONS
4.1. ADJUSTMENTS OF THE PI
It is possible to modify the PI times to meet specific needs. This function is not readily accessible because it is not often used.
Reminder: PI = R 10 min / R 1 min
The first PI time is 1 mn. It can be set to values from 30 s to 30 mn in 30 s steps.

DISPLAY
SET Var
SET Var
OFF
+
min sec

DISPLAY
SET V.LOCK
OFF
SET V.LOCK
+
min sec

DISPLAY
500V
2T Ω
OFF
500V
2T Ω
+
Keep the DISPLAY key pressed and turn the switch to
the SET Var position.
You can change the first PI time (PI_1) using the 
and keys.
To save changes simply, turn the switch.
The second PI time (PI_2) is 10 min. It can be set to values from PI_1 up to 59 mn in 1 mn steps.
Keep the DISPLAY key pressed and turn the switch to
the SET V.LOCK position.
You can modify the second PI time using the and
keys.
To save changes simply, turn the switch.
4.2. SERIAL NUMBER
To view the serial number of the instrument, keep the DISPLAY key pressed and turn the switch to the 500 V position.

14
4.3. INTERNAL SOFTWARE VERSION
To view the internal software version of the instrument, keep the DISPLAY key pressed and turn the switch to the 1000 V position.

DISPLAY
1000V
4T Ω
OFF
1000V
4T Ω
+

15
5. SPECIFICATIONS
5.1. REFERENCE CONDITIONS
Influence quantities Reference values
Temperature 23 ± 3°C
Relative humidity 45 to 55% RH
Supply voltage 9 to 12 V
Frequency range DC and 15.3...65 Hz
Capacity in parallel on resistor 0 µF
Electrical eld nil
Magnetic field < 40 A/m
5.2. CHARACTERISTICS PER FUNCTION
5.2.1. VOLTAGE
Characteristics
Measurement range 1.0 - 99.9 V 100 - 999 V 1000 - 2500 V 1000 - 5100 V
Frequency range 3DC and 15 Hz - 500 Hz 15 Hz - 500 Hz DC
Resolution 0.1 V 1 V 2 V 2 V
Accuracy 1% ± 5 pt 1% ± 1 pt
Input impedance 750 kΩ at 3 MΩdepending on measured voltage
3: Over 500 Hz, the small display indicates “- - - -” and the main display gives only an assessment of the peak value of the
measured voltage.
5.2.2. CURRENT
Current measurement before the insulation measurement:
Measurement
range
0.000 -
0.250 nA
0.250 -
9.999 nA
10.00 -
99.99 nA
100.0 -
999.9 nA
1000 -
9.999 µA
10.00 -
99.99 µA
100.0 -
999.9 µA
1000 -
3000 µA
Resolution 1 pA 1 pA 10 pA 100 pA 1 nA 10 nA 100 nA 1 µA
Accuracy 15% ± 10 pt 10% 5% 10%
Current measurement during the insulation measurement:
Measurement
range
0.000 -
0.250 nA
0.250 -
9.999 nA
10.00 -
99.99 nA
100.0 -
999.9 nA
1.000 -
9.999 µA
10.00 -
99.99 µA
100.0 -
999.9 µA
1000 -
3000 µA
Resolution 1 pA 1 pA 10 pA 100 pA 1 nA 10 nA 100 nA 1 µA
Accuracy 15% ± 10 pt 10% 5% 3% 5%
The 0.250 nA and 3000 µA ranges are not used for the insulation resistance calculations.
5.2.3. INSULATION RESISTANCE
Method: Voltage-current measurement as per IEC 61557-2 (Ed. 02/97)
Nominal output voltage: 500, 1000, 2500, 5000 V
dc
or adjustable from 40 V to 5100 V
No-load voltage: 510, 1020, 2550 and 5100 V ± 2% and Un ± 2% in variable mode
Variable voltage adjustment step: 10 V from 40 V to 1000 V
100 V from 1000 V to 5100 V
Nominal current: ≥1 mA
dc
at the nominal voltage
Short-circuit current: 1.6 mA ± 5% (3.1 mA max. when the measurement is started)
Maximum acceptable spurious voltage during the measurement: Upeak = 0.4 Un

16
Accuracy
Test voltage 500 V - 1000 V - 2500 V - 5000 V
Specified measurement
range
10 - 999 kΩ
1.000 - 3.999 MΩ4.00 - 39.99 MΩ40.0 - 399.9 MΩ0.400 - 3.999 GΩ
Resolution 1 kΩ 10 kΩ100 kΩ1 MΩ
Accuracy ±5% + 3 pt
Test voltage 500 V - 1000 V - 2500 V - 5000 V 1000 V - 2500 V
5000 V
2500 V
5000 V
Specified
measurement range 4.00 - 39.99 GΩ40.0 - 399.9 GΩ0.400 - 1.999 TΩ2.000 - 3.999 TΩ4.00 - 9.99 TΩ
Resolution 10 MΩ100 MΩ1 GΩ10 GΩ
Accuracy ± 5% + 3 pt ±1 5% + 10 pt
Accuracy in variable mode
Rmeasured = Un / 250 pA
Test voltage 40 - 160 V 170 - 510 V 520 - 1500 V 1600 - 5100 V
Rmeasured min 10 kΩ10 kΩ10 kΩ10 kΩ
Rmeasured max 160.0 GΩ- 640.0 GΩ640.0 GΩ- 2.040 TΩ2.080 TΩ- 6.000 TΩ6.400 TΩ- 10.00 TΩ
To obtain the accuracy in variable voltage mode, calculate from the accuracies of the fixed voltages above.
Measurement of DC voltage during insulation test
Specified measurement range 40.0 - 99.9 V 100 - 1500 V 1501 - 5100 V
Resolution 0.1 V 1 V 2 V
Accuracy 1% ± 1 pt
Measurement of the test voltage after a capacitive insulation measurement
Specified measurement range 25 - 5000 V
Resolution 0.2% Un or 1 pt
Accuracy 5% ± 3 pt
Calculation of terms DAR and PI
Specified range 0.02 - 50.00
Resolution 0.01
Accuracy 5% ± 1 pt

17
Typical change curve for test voltages according to load
Range 500 V
0
100
200
300
400
500
600
0,01 0,1 1
MΩ
V
0
500
1000
1500
2000
2500
3000
0,01 0,1 1 10
MΩ
V
0
1000
2000
3000
4000
5000
6000
0,01 0,1 1 10
MΩ
V
0
200
400
600
800
1000
1200
0,01 0,1 1 10
MΩ
V
Range 1000 V
Range 2500 V
Range 5000 V

18
5.2.4. CAPACITANCE
This measurement is made at the end of each insulation measurement, while the circuit is being discharged.
Specified measurement range 0.001 - 9.999 µF 10.00 - 49.99 µF
Resolution 1 nF 10 nF
Accuracy 10% ± 1 pt 10%
5.3. POWER SUPPLY
The equipment power supply is obtained from:
Rechargeable NiMh batteries - 8 x 1.2 V / 3.5 Ah
Line voltage: 85 to 256 V / 50-60 Hz
Consumption
For insulation measurements at 5000 V and 1 mA: 11 W
For voltage measurements: 0.9 W
On standby: 0.01 W
Minimum operating time (per IEC 61557)
Test voltage 500 V 1000 V 2500 V 5000 V
Nominal load 500 kΩ1 MΩ2.5 MΩ5 MΩ
Number of measurements (with 25 s pause between
each measurement) 6500 5500 4000 1500
In voltage measurement mode, the battery life is 35 hours.
Recharge time
Charging must be done between 20 and 30°C.
6 hours to recover 100% capacity (10 hours if the battery is completely run down).
0.5 hours to recover 10% capacity (charge life: 2 days approximately)
It is essential to charge the battery before calibration tests.
Note: It is possible to recharge the batteries while performing insulation measurements provided that the values measured are
higher than 20 MΩ. In this case, the recharging time is higher than 6 hours. Otherwise, the battery is discharged faster than
it is charged.
5.4. CONSTRUCTION SPECIFICATIONS
Overall dimensions of the unit (L x l x h): 270 x 250 x 180 mm
Weight: approximately 4.3 kg
5.5. ENVIRONMENTAL PARAMETERS
Range of use
-10°C to 40°C, during battery recharging
-10°C to 55°C, during measurement
20% to 80% RH
Storage
-40 at 70°C, from 10% to 90% RH
Altitude: < 2000 m
Use indoors or outdoors.

19
Diagram of climatic conditions:
100
90
80
70
60
50
40
30
20
10
0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
°C
32
1
% RH
1: Reference range
2: Operating range
3: Storage range (without battery)
5.6. COMPLIANCE WITH INTERNATIONAL STANDARDS
Electrical safety as per:IEC 61010-1 and IEC 61557
Double insulation
Pollution level: 2
Max. voltage relative to earth: 1000 V in measurement category III or 600 V in measurement category I V.
5.6.1. ELECTROMAGNETIC COMPATIBILITY
Emissions and immunity in an industrial setting compliant with IEC 61326-1.
5.6.2. MECHANICAL PROTECTION
IP 53 per IEC 60529
IK 04 per IEC 50102
5.7. VARIATIONS IN OPERATING RANGE
Influential quantity Range of influence Quantity
influenced 4
Influence
Typical Maximum
Battery voltage 9 V - 12 V V
MΩ
< 1 pt
< 1 pt
2 pt
3 pt
Temperature -10°C +55°C V
MΩ
0.15% /10°C
0.20% /10°C
0.3% /10°C +1 pt
1% /10°C + 2 pt
Humidity 20% - 80% HR
V
MΩ(10 kΩto 40 GΩ)
MΩ(40 GΩto 10 TΩ)
0.2%
0.2%
0.3%
1% +2 pt
1% +5 pt
15% +5 pt
Frequency 15 - 500 Hz V 3% 0.5% +1 pt
AC voltage
superimposed on the
Test voltage
0% Un - 20% Un MΩ0.1% / % Un 0.5% / % Un +5 pt
4: The terms DAR and PI and the capacitance and current leak measurements are included in the quantity “MΩ”.

20
6. MAINTENANCE
Except for the fuse, the instrument contains no parts that can be replaced by personnel who have not been specially
trained and accredited. Any unauthorized repair or replacement of a part by an “equivalent” may gravely impair safety.
6.1. BATTERY RECHARGE
If the symbol is displayed, the battery must be recharged. Connect the instrument to line power using the mains lead; it
starts charging automatically and the symbol flashes:
bAt on the small display unit and chrG on the main display unit means fast charging in progress.
bAt on the small display unit and chrG flashing on the main display unit means that slow charging is in progress
bAt on the small display unit and FULL on the main display unit means that charging is over.
The battery must be replaced by Manumesure or by a repairer approved by CHAUVIN ARNOUX.
6.2. REPLACEMENT OF THE FUSE
If FUSE -G- appears on the display. Ensure the instrument is disconnected from any source (both test leads and mains lead) the
instrument is switched off and replace the fuse located on the front panel.
For your safety, replace a defective fuse with only a fuse having strictly identical characteristics:
Exact type of fuse (entered on the label on the front panel): FF - 0.1 A - 380 V - 5 x 20 mm - 10 kA.
Note: This fuse is in series with a 0.5 A / 3 kV internal fuse active only in case of major fault in the unit. If after changing the fuse
on the front panel, the display still indicates FUSE - G -, the unit must be returned for servicing (see § 6.3)
6.3. CLEANING
Disconnect the unit completely and turn the rotary switch to OFF.
Use a soft cloth, dampened with soapy water. Rinse with a damp cloth and dry rapidly with a dry cloth or forced air. Do not use
alcohol, solvents, or hydrocarbons.
6.4. STORAGE
If the instrument has been left unused for an extended period (more than two months), fully charge the battery before using.