Chauvin Arnoux C.A 6121 User manual

C.A 6121
C2
P2C1 P1
TEST
MAINS
TEST
REMOTE WARNING LAMP 12V~
1 - 1.25 - 1.5 kV~
START / STOP
TEST ON
230V / 50Hz
600VA
RS232C
+
ON
OFF
INSULATION (M )ΩDISCHARGE TIME ( t)∆
CONTINUITY 12V/>10A ( U,R )∆10A ~
DIELECTRIC (HV)
600V CAT III
C.A 6121
MACHINE TESTER
H
V
M
Ω
R
1
0
A
∆
t
∆
U
ARNOUX
CHAUVIN
500 - 1000 V
MΩ500V 150MΩ
U=513V
9min 59s
MΩ
113.5
TimerRminUn
nn
nn
nCONTROLEUR "MACHINE"
nn
nn
nMACHINE TESTER
nn
nn
nMASCHINEN-TESTER
nn
nn
nMACHINE TESTER
nn
nn
nCOMPROBADOR DE MAQUINARIA
ELECTRICA
User's Manual
FRANCAIS
ENGLISH
DEUTSCH
ITALIANO
ESPAÑOL
Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: [phone] (Hunting) Fax: [phone]
Mobile: [phone]

The means Warning
For your safety,you must read carefully and respect the instructions of the present user’s manual.
You have just acquired a C.A 6121 Machine Tester and we thank you for your confidence.
To get the best results with this instrument :
■read this user’s manual carefully, otherwise this instrument may be dangerous for the user,for the instrument itself or
for the circuit under test !
■respect the safety precautions detailed in the present manual
SAFETY PRECAUTIONS
■This instrument must be powered from a mains supply which has a protective earth terminal
■The INSULATION, CONTINUITY or DIELECTRIC measurement terminals must only be connected to circuits that are not live.
■If a fuse has blown in the instrument, please follow the instructions in this manual to replace it!
■Any repair or metrological check procedure must be carried out by competent and approved personnel!
■The C.A 6121 MACHINE TESTER must only be handled by a competent operator, familiar with equipment using dangerous
voltages !
■Use connection accessories whose overvoltage category and service voltaage are greater than or equal to those of the circuits
on which the measurements are made. Only use accessories that conform to safety standards (EN61010-031).
■Insulation
The terminal is grounded, connect it to the ground pole of the instrument to test !
■Continuity
Please read the instructions on how to replace the fuses
■Dielectric
Switch off the instrument immediately if the red safety light (pos.11, fig 1.)
does not light after switching on the HT generator and have the instrument
repaired.
■Definitions
Warning : risk of electric shock
Earth terminal
The power supply input has an overvoltage category II. It must be connected to permanent domestic and analogous electrical
installations (cf. IEC 664-1).
The measurement terminals for the DISCHARGE TIME have an overvoltage category II. They satisfy the severe requirements
of reliability and availability which correspond to permanent use on fixed industrial installations (cf.IEC 664-1).
Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: [phone] (Hunting) Fax: [phone]
Mobile: [phone]

27
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).
CONTENTS
1. GENERAL PRESENTATION ................................................................................................................................................. 28
2. DESCRIPTION OF THE INSTRUMENT ............................................................................................................................... 28
3. TECHNICAL SPECIFICATIONS ........................................................................................................................................... 29
3.1. Dielectric test (position HV) ....................................................................................................................................... 29
3.2. Voltage drop at 10 A AC (position ∆U) ...................................................................................................................... 30
3.3. Low resistance (position R 10 A)................................................................................................................................. 30
3.4. Insulation resistance .................................................................................................................................................. 31
3.4.1 Rated voltage 500 V DC ................................................................................................................................. 31
3.4.2 Rated voltage 1000 V DC ............................................................................................................................... 31
3.5. Discharge time (position ∆t)....................................................................................................................................... 31
3.5.1 Discharge time on mains supply socket (MAINS TEST inputs) ..................................................................... 31
3.5.2 Discharge time on internal electronic components (TEST inputs) ................................................................. 31
3.6. General specifications ............................................................................................................................................... 32
4. MEASUREMENTS ................................................................................................................................................................ 32
4.1. Dielectric test ............................................................................................................................................................. 32
4.2. Voltage drop scaled to 10 A (position ∆U) ................................................................................................................ 34
4.3. Low resistance (position R10A).................................................................................................................................. 35
4.4. Insulation resistance .................................................................................................................................................. 36
4.5. Discharge time - 2 pole system ................................................................................................................................. 37
4.6. Discharge time - 4 pole system ................................................................................................................................. 38
5. OPERATION ......................................................................................................................................................................... 39
5.1. Warnings.................................................................................................................................................................... 39
5.2. Memorising the results .............................................................................................................................................. 40
5.3. Recalling stored results ............................................................................................................................................. 40
5.4. RS232 communication (for printout and connection to a PC) ................................................................................... 41
5.5 Erasing the results ..................................................................................................................................................... 43
5.6. Reinitialising the instrument ...................................................................................................................................... 44
5.7. Configuration ............................................................................................................................................................. 44
5.7.1. Display contrast .............................................................................................................................................. 44
5.7.2. Time and date ................................................................................................................................................ 45
5.7.3. Warning buzzer .............................................................................................................................................. 45
5.7.4. Baud rate ........................................................................................................................................................ 46
5.8. Sound signals ............................................................................................................................................................ 46
5.9 Use of remote control pedal ...................................................................................................................................... 46
5.10 Use of warning lamps (standard VDE 104) ............................................................................................................... 47
6. MAINTENANCE .................................................................................................................................................................... 48
6.1. Usual cleaning ........................................................................................................................................................... 48
6.2. Replacing the fuses (for properly qualified maintenance personnel only !) .............................................................. 48
6.3 Metrological check..................................................................................................................................................... 48
6.4. After sales service ..................................................................................................................................................... 48
7. TO ORDER ........................................................................................................................................................................... 49
27

28
1. GENERAL PRESENTATION
This machine has been designed for testing the electrical safety of machines, in conformity with standard EN60204-1, parts 19 -1 to
19-5.
Its worksite case is hardwearing, but also easy to carry to your measurement site.Its interface, simple to use, gives you very rapid
access to all the main functions of the instrument. Its optional accessories allow it to be adapted to all specific environments.
List of measurements that the instrument can perform :
■Dielectric test with a test voltage of 1000 V AC
■Dielectric test with a test voltage of 1250 V AC
■Dielectric test with a test voltage of 1500 V AC
■Voltage drop scaled to 10 A AC with a test voltage of 12 V / > 10 A AC
■Low resistance with a test voltage of 12 V / >10 A AC
■Insulation resistance with a test voltage of 500 V DC
■Insulation resistance with a test voltage of 1000 V DC
■Two pole discharge time (residual voltage)
■Four pole discharge time (residual voltage)
2. DESCRIPTION OF THE INSTRUMENT
C2
P2C1 P1
TEST
MAINS
TEST
REMOTE WARNING LAMP 12V~
1 - 1.25 - 1.5 kV~
START/STOP
TEST ON
230V / 50Hz
600VA
RS232C
+
ON
OFF
INSULATION (M )Ω
500 - 1000 V
DISCHARGE TIME ( t)∆
CONTINUITY 12V/>10A ( U,R )∆10A ~
DIELECTRIC (HV)
600V CAT III
C.A 6121
MACHINE TESTER
MΩ500V 150MΩ
U=513V
9min 59s
MΩ
113.5
TimerRminUn
H
V
M
Ω
R
1
0
A
∆
t
∆
U
ARNOUX
CHAUVIN
MEM/MR PRINT/RS / SET-UP
MEM/MR PRINT/RS SET-UP
123 4 5 678
9
10
11
12
1314151617
18
19
20
Fig.1. Presentation of the front panel

29
1REMOTE connector to connect a REMOTE CONTROL PEDAL
2WARNING LAMP connector to connect external WARNING LAMPS (standard VDE 104)
3RS 232 connector to connect external printer or PC
4DISCHARGE TIME - TEST terminals to be used in four pole measurement
5DISCHARGE TIME - MAINS TEST terminals to be used in 2 or 4 pole measurement
6LCD dot matrix display with continuous back light
7GENERAL KEYS (see the function of each key on the LCD)
8MAINS CONNECTOR (mains power supply of the instrument)
9POWER ON indicator light
10 POWER ON / OFF key
11 TEST ON warning light
12 START/STOP push button
13 SET UP key to set:
- contrast of the display
- real time clock and date
- buzzer (on/off)
- baud rate
14 ROTARY SWITCH to select the functions
15 PRINT/RS key to:
- transmit memorised data to a PC
- print memorized data to external printer
16 MEM/MR key to:
- memorize results
- recall memorized results
- erade memorized results
17 DIELECTRIC test terminals
18 CONTINUITY test terminals (current terminals C1, C2 and potential test terminals P1, P2)
19 Grounded INSULATION test terminal
20 Positive INSULATION test terminal
3.TECHNICAL SPECIFICATIONS
3.1. DIELECTRIC TEST (POSITION HV)
■Nominal test voltage : adjustable 1000, 1250 or 1500 V / 50 Hz
■Test voltage : >1000 V, >1250 V or >1500 V / 50 Hz at Umains = 230 V, and a power Pload = 500 VA
■Max open circuit test voltage : < 1200 V, < 1450 V, < 1650 V / 50 Hz for Umains = 230 V
■Test voltage readout
Range (kV) Resolution (V) Accuracy
0 - 2.00 10 ±(2% of the reading + 20 V)
■Tripping test current (nominal test voltage 1000V) :
adjustable to 1, 3, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 150, 200, 250, 300, 350, 400, 450, 500 mA
■Tripping test current (nominal test voltage 1250V) :
adjustable to 1, 3, 5, 10, 20, 30, 40, 50,60, 70, 80, 90, 100, 150, 200, 250, 300, 350, 400 mA
■Tripping test current (nominal test voltage 1500V) :
adjustable to 1, 3, 5, 10, 20, 30, 40, 50, 60,.70, 80, 90, 100, 150, 200, 250, 300, 333 mA
■Test current readout (sine) :
Range (mA) Resolution (mA) Accuracy
0 - 199.9 0.1 ± (2% of the reading + 0.3 mA)
Tripping current set to 1, 3, 5, 10 or 20 mA
± (2% of the reading + 0.5 mA)
200 - 500 1Tripping current set to 30, 40, 50, 60, 70, 80, 90 or 100 mA
±(2% of the reading + 2 mA)
Tripping current set to 150, 200, 250, 300, 330, 350, 400, 450 or 500 mA
■Character of the displayed test current: adjustable ( ), capacitive ( ) or absolute value ( I I I
A R C
= +
2 2 )
■Trip out time : < 30 ms after crossing threshold
■Timer : adjustable from 1 s to 5 min (resolution 1s, then 10 s if duration > 1 min) or without timer

30
3.2. VOLTAGE DROP SCALED TO 10 A AC (POSITION ∆∆
∆∆
∆U)
■Voltage drop readout :
Range ∆U (V) Resolution (V) Accuracy
0 - 10 0.01 ±(2% of the reading + 0.02 V)
■Test voltage readout :
Range (V) Resolution (V) Accuracy
0 - 12 0.01 ±(2% of the reading + 0.02 V)
■Test current readout :
Range (A) Resolution (A) Accuracy
0 - 9.99 0.01 ±(5% of the reading + 2 pt.)
10.0 - 25.0 0.1 ±3% of the reading
■Max permitted voltage drop depending on the cross section of the cable :
Cross section of the cable (mm2)Max voltage drop (V)
0.5 5
0.75 5
13.3
1.5 2.6
2.5 1.9
41.4
≥6 1.0
■Max output voltage : 12 V AC
■Measurement current (0 - 0.5 Ω) : > 10 A AC
■Timer :adjustable from 1 to 15 s (resolution 1s) or without timer
■Connection system : 4 wire
3.3. LOW RESISTANCE (POSITION R10A)
■Resistance readout :
Range R * Resolution (mΩ)Accuracy
0-999 mΩ1±(2% of the reading + 2 mΩ)
1.00 - 1.99 Ω10 ± 5% of the reading
* automatic ranges
■Max output voltage :12 V AC
■Measurement current (0 - 0.5 Ω):> 10 A AC
■Threshold value :adjustable from 10 mΩto 1000 mΩ(resolution 10 mΩ) then from 1000 mΩto 2000 mΩ
(resolution of 100 mΩ) or without threshhold (* mΩ)
■Timer :adjustable from 1 to 15 s (resolution 1 s) or without timer
■Connection system :4 wire
■Test voltage readout :
Range (V) Resolution (V) Accuracy
0 - 12 0.01 ±(2% of the reading + 0.02 V)
■Test current readout :
Range (A) Resolution (A) Accuracy
0 - 9.99 0.01 ±(5% of the reading + 2 pt.)
10.0 - 25.0 0.1 ±(2% of the reading)

31
3.4. INSULATION RESISTANCE
3.4.1 Nominal voltage 500 V DC
■Insulation resistance readout :
Range* (MΩ)Resolution (kΩ)Accuracy
0 - 1.999 1
2.00 - 19.99 10 ±(2% rdg + 2 counts)
20.0 - 199.9 100
200 - 500 1000 ±10% rdg
* gammes automatiques
■Range :0 - 200 MΩ(stable result even on a capacitive load)
■Nominal voltage :500 V DC (+10% / - 0%)
■Short circuit current :1.4 mA max.
■Measurement current :1 mA min. at 500 kΩload
■Threshold value :adjustable from 0.2 MΩto 1 MΩ(resolution 0.1 MΩ)
1 MΩto 10 MΩ(resolution 1 MΩ)
10 MΩto 500 MΩ(resolution 10 MΩ)
or without threshold (* MΩ)
■Timer :adjustable from 2 s to 10 min (resolution 1 s, then 10 s if duration > 1 min) or without timer
3.4.2 Nominal voltage 1000 V DC
■Insulation resistance readout :
Range* (MΩ)Resolution (kΩ)Accuracy
0 - 1.999 1
2.00 - 19.99 10 ±(2% rdg + 2 counts)
20.0 - 199.9 100
200 - 500 1000 ±10% rdg
* automatic ranges
■Range :0 - 200 MΩ(stable result even on a capacitive load)
■Nominal voltage :1000 V DC (+10% / -0%)
■Short circuit current :1.4 mA max.
■Measurement current :1 mA min. at 1000 kΩload
■Threshold value :adjustable from 0.2 MΩto 1 MΩ(resolution 0.1 MΩ)
1 MΩto 10 MΩ(resolution 1 MΩ)
10 MΩto 500 MΩ(resolution 10 MΩ)
or without threshold (* MΩ)
■Timer :adjustable from 2 s to 10 min (resolution 1 s, then 10 s if duration > 1 min) or without timer
■Test voltage readout :
Range (V) Resolution (V) Accuracy
0 - 1200 1±(2% rdg + 2 counts)
3.5. DISCHARGE TIME (POSITION ∆∆
∆∆
∆T)
3.5.1 Discharge time on mains supply socket (MAINS TEST inputs)
■Max service voltage : 600 V AC/DC
■Range : 0 - 10 s
■Threshold of discharge time : 1 s
■Resolution : 0.1 s
■Accuracy : ± (2% rdg + 0.2 s)
■Level of safety voltage :60 V
■Internal resistance of the MAINS TEST input : 96 MΩ
3.5.2 Discharge time on internal electronic components (TEST inputs)
■Max service voltage : 600 V AC/DC
■Range : 0 - 10 s

32
■Threshold of discharge time : 5 s
■Resolution : 0.1 s
■Accuracy : ± (2% of the reading +0.2 s)
■Level of safety voltage : 60 V
■Internal resistance of the TEST input : 96 MΩ
3.6. GENERAL SPECIFICATIONS
■Mains voltage :230 V / 50 Hz
■Max power absorbed :600 VA
■Screen :LCD dot matrix,128 x 64 counts with continuous backlight
■Interface RS232 :1 start bit, 8 data bits, 1 stop bit, XON/XOFF protocol,
Baud rate adjustable to 300, 600, 1200, 2400, or 4800 Bauds
■Memories :999 memory locations
■Remote control signals :START/STOP, SAVE
■Protection of the measurement circuits :F1 F 20 A/600 V 10.3 x 38 mm (Continuity/ ammeter)
F2 T 1 A/250 V 5 x 20 mm (warning lamp output)
F3 T 4 A/250 V 5 x 20 mm (general protection of the instrument)
F4 F 0.2 A/250 V 6.3 x 32 mm (Continuity/ voltmeter)
■Shockproof plastic case
■Dimensions : (W x H x L) 400 x 260 x 250 mm
■Weight : 11 kg
■Protection index : IP 40 (open) IP54 (closed)
■Working temperature range :0...+50°C
■Reference temperature range :+5...+35°C
■Storage temperature range :-10...+60°C
■Max working humidity :85% RH (0...+40°C)
■Max storage humidity :90% RH (-10...+40°C)
80% RH (+40...+60°C)
■Use indoors
■Altitude < 2000 m
■Dielectric strength test
- between mains and dielectric terminals: 4300 Vrms / 1 min
- between mains and other terminals or accessible metallic parts: 3700 Vrms / 1 min
■List of standards respected by the tester :
Protection class 1 (with protection earth terminal)
IEC 61010-1 : Pollution degree 2
EN 60204-1 : Test of electric machines
VDE 104 : Installation and operation of electric test equipment
EN 61180-1.2 : High tension test techniques for low voltage equipment
EN 61326-1 : EMC - Emissions and immunity
4. MEASUREMENTS
4.1. DIELECTRIC TEST
Fig. 2. Test current
RLOAD CLOAD
iCiR
iA
230 V/50 Hz
1 kV
1.25 kV
1.5 kV
V
A
C.A 6121 MACHINE TESTER TESTED INSTRUMENT
1-1.25-1.5 kV

33
iR
0
iC
-jIm
Re
i
A
i .....absolute value of current
A
i = i + i
A C R
i .....capacitive current
C
i .....resistive current
R
Fig. 3. Test current diagram
How to perform the measurement ?
1. Set the rotary switch to the HV (high voltage) position; the following screen is displayed :
1mn 00s
_ _ _ _ mA
TimerIUn
U:_ _ _ _ kV
HV 1000V 1mA
Function name
Nominal test voltage Tripping out current
Test voltage
Set timer value
Timer key to set timer
value or to switch it on/off
I key to select tripping out
current or to select character
of displayed leakage current
Leakage current
(main result)
Un key to select
nominal test voltage
Fig.4. Basic screen in HV position
2. Select the test parameters as follows :
■Character of the displayed test current (fig. 5)
-Press Ikey and keep it pressed (approx. 2 s) until the menu for selection of
current character is displayed.
-Press ññ
ññ
ñto select resistive part (the symbol is displayed above the
mA unit), capacitive part (the symbol is displayed above the mA unit),
or absolute value (nothing is displayed above the mA unit).
-Press EXIT key to exit this menu
■Tripping out current (fig. 6)
-Press Ikey to open the tripping out current selection menu.
-Press the ññ
ññ
ñor òò
òò
òkeys to choose the tripping current.
-Press EXIT key to exit this menu
■Test voltage
-Press the UNkey to choose the test voltage between 1 kV, 1.25 kV or 1.5 kV.
■Timer ON/ OFF
-Press the TIMER key to validate the timer (the chosen test time is displayed)
or not validate the timer (the test time is not displayed).
■Duration of the test (fig. 7)
-Press the TIMER key and keep it pressed (approx. 2 s) until the menu for
selection of the timer value is displayed.
-Press the ññ
ññ
ñor òò
òò
òkeys to select the duration of the test.
-Press EXIT key to exit this menu
NOTES : The value of the test current threshold that has been defined is always
compared to the absolute value of the test current, whatever the chosen
character displayed: resistive (real) or capacitive (imaginary).
1mn 00s
_ _ _ _ mA
Exit
Set Character
U:_ _ _ _ kV
HV 1000V 1mA
Fig.5. Menu for selection of test
current character
1mn 00s
_ _ _ _ mA
Exit
Set Imax
U:_ _ _ _ kV
HV 1000V 1mA
Fig.6. Menu for selection of tripping
out current
1mn 00s
_ _ _ _ mA
Exit
Set Timer
U:_ _ _ _ kV
HV 1000V 1mA
Fig.7. Timer value selection menu

34
RLOAD
R=100
iΩ∆U
C2
iTEST
P2
P1
C1
230V/50Hz V
A
C.A 6121 MACHINE TESTER OBJECT UNDER TEST
F1
F4
3. Connect the test probes (guns) to the instrument as shown in the figure 8.
4. Press the START/STOP key to start the high voltage
generator and perform the test using test probes.
5. Press the START/STOP key to stop the high voltage
generator or wait for set time to elapse,if the timer
has been used.
NOTES :
■■
■■
■Takecare whenhandlingHTprobes -dangerousvoltages!
■■
■■
■Use the Timer ON mode or optional REMOTE CONTROL
pedal to stop the measurement when the test probes are
still connected to the tested instrument. The results
displayed that are obtained in this way can be saved in
the memory for documentation purposes.
■■
■■
■It is advisable to connect the test probes before starting
the test using the REMOTE CONTROL pedal, to avoid
sparks and thus unwished tripping out of HV generator.
■■
■■
■For greater safety standard VDE 104 recommends the use of optional WARNING LAMPS, connected to the instrument, in
particular when the measurements have to made at a distance from the instrument using the optional test probes, equipped with
longer cables (6 m).
■■
■■
■When the test current is greater than the pre-set limit, the HT generator trips automatically when this value is exceeded, and the
pre-set limit value is displayed as the result.
6. Save the displayed result for documentation purposes (refer to the instructions in chapter 5.2. to find out the procedure
for saving the displayed result).
4.2. VOLTAGE DROP SCALED TO 10 A AC (POSITION ∆∆
∆∆
∆U)
U :
n
P :
transf.
I :
lim
1000, 1250 or
1500 V/50 Hz
500 VA
1...500 mA
C2
P2
C1 P1
600V 250V CAT III
600V
TEST
MAINS
TEST
REMOTE WARNINGLAMP 12V~
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
230V / 50Hz
500VA
RS232C
MEM/MR PRINT/RS SET-UP
C.A 6121
MACHINE TESTER
ON
OFF
H
V
M
Ω
R
1
0
A
∆
t
∆
U
ARNOUX
CHAUVIN
INSULATION (M )Ω
500 - 1000 V
DISCHARGE TIME ( t)∆
CONTINUITY 12V/>10A ( U,R )∆10A
DIELECTRIC (HV)
Fig.8. Connection of test probes
Fig.9. Test circuits
How to perform the measurement ?
1. Set the rotary switch to the ∆∆
∆∆
∆U position (voltage drop); the following screen is displayed :
10s
_ _ _ _ V
Timer∆Umax
I:_ _ _ _ A
U:_ _ _ _ V
∆U5.0V 0.50mm 2
Function name
Threshold voltage drop/wire section
Test voltage
Test current
Set timer value
Timer key to set timer
value or to switch it on/off
Voltage drop scaled
to 10A (main result)
Umax key to set threshold
value of voltage drop
Fig.10. Basic screen in ∆∆
∆∆
∆U (voltage drop) position

35
2. Select the test parameters as follows :
■■
■■
■Voltage drop threshold
-Press the ∆Umax key to select the threshold, refer to the table in
chapter 3.2.
■■
■■
■Timer ON/ OFF
-Refer to the instructions in chapter 4.1.
■■
■■
■Duration of the test
-Refer to the instructions allowing definition of the duration in
chapter 4.1.
3. Connect the test leads to the instrument and to the tested
instrument in accordance with the figure 11.
4. Press the START/STOP key to start the measurement.
5. Wait for the set time to elapse (if the timer has been switched on)
or press the START/STOP key again to stop the measurement.
6. Save the displayed result for documentation purposes (refert to
the instructions in chapter 5.2 to save the displayed result).
4.3. LOW RESISTANCE (POSITION R10A)
Refer to the test circuits, fig.9.
How to perform the measurement ?
1. Set the rotary switch to the R 10A position (low resistance); the following screen is displayed.
10s
_ _ _ _ mΩ
TimerRmax
U:_ _ _ _ V
I:_ _ _ _ A
R-10A 100mΩ
Function name
Threshold resistance
Test voltage
Test current
Set timer value
Timer key to set timer
value or to switch it on/off
Resistance
(main result)
Rmax key to set
threshold resistance
Fig.12. Basic screen in position R10A
2. Select the test parameters as follows :
■■
■■
■Resistance threshold
-Press the Rmax key to access the selection menu for the resistance threshold.
10sSet Rmax
_ _ _ _ mΩ
Exit
U:_ _ _ _ V
I:_ _ _ _ A
R-10A 100mΩ
Fig.13. Low resistance threshold selection menu
-Press the ññ
ññ
ñor òò
òò
òkeys to select the threshold*.
*A buzzer will ring if this threshold is exceeded. If the value
∗
mW is chosen as limit, the result will not be compared to any
threshold and no buzzer will ring.
-Press EXIT key to exit this menu
■■
■■
■Timer ON/ OFF
-Refer to the instructions in chapter 4.1.
■■
■■
■Duration of the test
-Refer to the instructions allowing definition of the duration in chapter 4.1.
L1
L2
L3
OFF
N
PE
U :
I :
test
test
U : 0...10 V (scaled to 10 A)D
<12 V/50 Hz
>10 A AC (for R : 0...500 m )W
C2 P2
C1 P1
600V 250V CAT III
600V
TEST
MAINS
TEST
REMOTE WARNINGLAMP12V~
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
230V / 50Hz
500VA
RS232C
MEM/MR PRINT/RS SET-UP
C.A 6121
MACHINETESTER
ON
OFF
H
V
M
W
R
1
0
A
D
t
D
U
ARNOUX
CHAUVIN
INSULATION (M )W
500 - 1000 V
DISCHARGE TIME ( t)D
CONTINUITY 12V/>10A ( U,R )D10A
DIELECTRIC (HV)
Fig.11. Connection of the test leads

36
3. Connect the test leads to the instrument and to the tested instrument in
accordance with figure 14.
4. Press the START/STOP key to start the measurement.
5. Wait for the set time to elapse (if the timer has been switched on) or press
the START/STOP key again to stop the measurement.
6. Save the displayed result for documentation purposes (refert to the
instructions in chapter 5.2 to save the displayed result).
4.4. INSULATION RESISTANCE
Rins
Iins
GV
A
C.A 6121 MACHINE TESTER OBJECT UNDER TEST
+
-
+
500/1000 V DC
Fig.15. Test circuits
How to perform the measurement ?
1. Set the rotary switch to MΩΩ
ΩΩ
Ωposition(insulation resistance); the following screen is displayed.
10mn
_ _ _ _ MΩ
TimerRminUn
1000V 1MΩ
MΩ
Function name
Nominal test voltage Threshold insulation resistance
Set timer value
Timer key to set timer
value or to switch it on/off
Rmin key to set
threshold insulation resistance
Insulation
resistance
Un key to set
nominal test voltage
Fig.16. Basic screen in MΩΩ
ΩΩ
Ωposition
2. Select the test parameters as follows :
■■
■■
■Insulation resistance threshold
-Press the Rmin key to access the menu for insulation resistance threshold selection.
-Press the ññ
ññ
ñou òò
òò
òkeys to select the threshold*.
*A buzzer will ring if this threshold is exceeded. If the value
∗
m
Ω
is chosen as
limit, the result will not be compared to any threshold and no buzzer will ring.
-Press EXIT key to exit this menu
■■
■■
■Test voltage
-Press the Unkey to select the test voltage: 500 V DC or 1000 V DC
■■
■■
■Timer ON/ OFF
-Refer to the instructions in chapter 4.1.
■■
■■
■Duration of the test
-Refer to the instructions allowing definition of the duration in chapter 4.1.
10mn
_ _ _ _ MΩ
Exit
1000V 1MΩ
MΩ
Fig.17. Insulation resistance
threshold selection menu
L1
L2
L3
OFF
N
PE
U :
I :
test
test
<12 V/50 Hz
>10 A AC (for R : 0...500 m )W
C2 P2
C1 P1
600V 250V CAT III
600V
TEST
MAINS
TEST
REMOTE WARNING LAMP 12V~
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
230V / 50Hz
500VA
RS232C
MEM/MR PRINT/RS SET-UP
C.A 6121
MACHINETESTER
ON
OFF
H
V
M
W
R
1
0
A
D
t
D
U
ARNOUX
CHAUVIN
INSULATION (M )W
500 - 1000 V
DISCHARGE TIME ( t)D
CONTINUITY 12V/>10A ( U,R )D10A
DIELECTRIC (HV)
Fig.14. Connection of the test leads

37
3. Connectthetestleadstothe instrument andto thetestedinstrument
in accordance with the figure 18.
4. Press the START/STOP key to start the measurement.
5. Wait for the set time to elapse (if the timer has been switched on)
or press the START/STOP key again to stop the measurement.
6. Savethe displayedresultfor documentationpurposes(refer tothe
instructions in chapter 5.2 to save the displayed result).
NOTES :
■■
■■
■The actual test voltage is displayed during the measurement and also
after finishing the measurement until the voltage drops to 60 V.
■■
■■
■Do not disconnect the leads until the voltage present drops down to
60 V and do not touch the test terminals during that time.
4.5. DISCHARGE TIME - 2 POLE SYSTEM
R 230 V/50 Hz
C L
V
C.A 6121 MACHINE TESTER
OBJECT UNDER TEST
MAINS TEST
Fig.19. Test circuits
discharge time
60 V t
expected
MAINS TEST
input voltage
disconnection
voltage
ideal power disconnection
moment
power disconnection moment
Fig.20. Voltage on MAINS TEST input
How to perform the measurement ?
1. Set the rotary switch to ∆t (discharge time) position; the following screen is displayed.
U:_ _ _ _ V _ _ _ _ S
Syst.
2-point 1s
∆t
Function name
Selected connection system Present voltage
during the test or
disconnection
voltage after
finishing the test
Discharge time
(main result)
Syst. key to select
connection system
Fig.21. Basic screen in ∆t position
L1
L2
L3
OFF
N
PE
U :
R:
I:
n500 or 1000 V DC
0... ...500 M
1 mA nominal
0,008...200 W
600V 250V CAT III
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
H
V
M
W
R
1
0
A
D
t
D
U
ARNOUX
CHAUVIN
INSULATION (M )W
500 - 1000 V
DISCHARGE TIME ( t)D
CONTINUITY 12V/>10A ( U,R )D10A
DIELECTRIC (HV)
Fig.18. Connection of the test leads

38
2. Select 2-pole system by pressing the SYST. key (2-point 1s is displayed)
3. Connect the test cable to the instrument and to the tested unit in accordance with figure 22 ; le symbol is displayed
above unit S, informing the user that the mains voltage is connected to the MAINS TEST input.
4. Press the START/STOP key to prepare the instrument for the mains
voltage cut-out; Ready is displayed after 1s approx.
5. Pull out the double connection element and wait for the result to be
displayed.
6. Save the displayed result for documentation purposes (refer to the
instructions in chapter 5.2 to save the displayed result).
NOTES :
■■
■■
■The red TEST ON lamp is on during the measurement (until pulling out
the double connection element and until the TEST voltage has dropped
to 60 V).
■■
■■
■The actual voltage is displayed during the measurement, and the
disconnection voltage (see fig.20) is displayed when the measurement
is finished.
■■
■■
■∆t < 0.1 s is displayed under the main result and no voltage is displayed
on the right of the display, if the discharge time is less than 0.1 s.
4.6. DISCHARGE TIME - 4 POLE SYSTEM
L
N
V
V
C.A 6121
MACHINE TESTER
detection
of mains
disconnection
rest
voltage
test
OBJECT UNDER TEST
MAINS TEST
TEST
Fig.23. Test circuits
t
expected
MAINS TEST
input voltage
power disconnection moment
discharge time 60 V t
possible
TEST input
voltage
disconnection
voltage
power disconnection moment
Fig.24. Expected voltage on MAIN TEST input Fig.25. Expected voltage on TEST input
Fig.22. Connection of the test leads
L
N
PE
U :
U :
t :
R :
in
lim
lim
in
t:D
0...600 V AC/DC
60 V DC
1 s
96 MW
0...10 s
C
C2 P2
C1 P1
600V 250V CAT III
600V
TEST
MAINS
TEST
REMOTE WARNINGLAMP 12V~
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
230V / 50Hz
500VA
RS232C
MEM/MR PRINT/RS SET-UP
C.A 6121
MACHINETESTER
ON
OFF
H
V
M
W
R
1
0
A
D
t
D
U
ARNOUX
CHAUVIN
INSULATION (M )W
500 - 1000 V
DISCHARGE TIME ( t)D
CONTINUITY 12V/>10A ( U,R )D10A
DIELECTRIC (HV)

39
How to perform the measurement ?
1. Set the rotary switch to ∆∆
∆∆
∆t (discharge time) position; the screen in
fig.21 is displayed.
2. Select 4-pole system by pressing the SYST. key (4-point 5s is
displayed)
3. Connect the test cables to the instrument and to the tested unit in
accordance with figure 26; le symbol is displayed above unit
S, informing the user that the mains voltage is connected to the
MAINS TEST input.
4. Press the START/STOP key to prepare the instrument for the mains
voltage cut-out; Ready is displayed after 1s approx.
5. Pull out the double connection element and wait for the result to be
displayed.
6. Save the displayed result for documentation purposes (refer to the
instructions in chapter 5.2 to save the displayed result).
NOTES :
■■
■■
■The red TEST ON lamp is on during the measurement (until pulling out the double connection element and until the TEST voltage
has dropped to 60 V).
■■
■■
■The actual voltage is displayed during the measurement, and the disconnection voltage (see fig.20) is displayed when the
measurement is finished.
■■
■■
■∆t < 0.1 s is displayed under the main result and no voltage is displayed on the right of the display, if the discharge time is less
than 0.1 s.
5. OPERATION
5.1. WARNINGS
Different warnings in addition to information can be displayed during operation of the C.A 6121 MACHINE TESTER. See below a
list of warnings and information for each function.
■■
■■
■HV function :
Trip out : The HV generator tripped because the test current was higher than the set threshold value.
■■
■■
■∆∆
∆∆
∆U function :
∆U > ∆Umax : The displayed result (∆U) is higher than the set threshold value.
U > 12 V: The AC voltage connected to the input P1-P2 is higher than 12 V.
■■
■■
■R10A function :
R > Rmax : The displayed result (R) is higher than the set threshold value.
U > 12 V: The AC voltage connected to the input P1-P2 is higher than 12 V.
■■
■■
■MΩΩ
ΩΩ
Ωfunction :
R < Rmin : The displayed result (Rins) is lower than the set threshold value.
U > 30 V: The AC or DC voltage connected to the MW terminals is higher than 30 V.
■■
■■
■∆∆
∆∆
∆t function :
Voltage? :There is no voltage conected to MAINS TEST terminals.
∆t < 0.1 s :The voltage at the terminals of the MAINS TEST inputs dropped below 60 V in less than 0.1s.
∆t > tmax :The displayed result (∆t) is higher than the set threshold value (chosen at the same time as the connection
system; 2 pole or 4 pole).
■■
■■
■All functions :
HOT: The instrument is overheated (in functions ∆U, R10A or HV) ⇒wait.
Measurements in functions MΩor ∆t can still be carried out.
NO RESULT : There is no result on the display or the displayed result has already been saved.
NOTHING TO PRINT :There was no result saved/displayed before entering the PRINT menu.
Fig.26. Connection of the test leads
C
U :
U :
t :
R :
in
lim
lim
in
t:D
0...600 V AC/DC
60 V DC
5 s
96 MW
0...10 s
C2 P2
C1 P1
600V 250V CAT III
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
MEM/MR PRINT/RS SET-UP
C.A 6121
H
V
M
W
R
1
0
A
D
t
D
U
ARNOUX
CHAUVIN
INSULATION (M )W
500 - 1000 V
DISCHARGE TIME ( t)D
CONTINUITY 12V/>10A ( U,R )D10A
DIELECTRIC (HV)
L
N
PE

40
5.2. MEMORISINGTHE RESULTS
Any displayed result can be saved in one of 999 memory locations. The associated results as well as the test parameters are
saved at the same time as the main results and can be recalled or printed out later.
Each result is allocated a memory number (No.) and a machine number (MACH) e.g.: No:025 MACH:003
The machine number can be set between 001 and 255 and the memory numbers corresponding to each machine, between 001
and 999, until the total memory capacity is full.
Fig.27. Presentation of memory organisation
How to save the displayed results ?
Key used :
Opens the menu of Memory options :
Opens the menu for selection of the memory number and
the machine number : .
, , Enter the memory and machine numbers and validate/save by pressing the MEM ⇒⇒
⇒⇒
⇒. The result
is saved and the main menu is displayed again.
Press before validating/ saving (MEM) allows the user to exit without memorising the result.
NOTES :
■■
■■
■A displayed result can only be saved once (in order to avoid the risk of storing twice).
■■
■■
■Memory save locations already occupied can be erased by saving a new result at this location. The occupied locations are
marked with the letters OC and the free locations with the letters FR, next to the memory number.
No:003 OC MACH:162
■■
■■
■Rapid scrolling of the memory and mchine numbers is done by continuous press on the and keys.
5.3. RECALLING STORED RESULTS
To check a result stored in the memory, the stored result recall function can be used as follows:
Key used :
Opens the menu of Memory options : .
The highest save location corresponding to the last machine number used is displayed, as well as the
following menu : .
, Press the No òò
òò
òkey to consult the results saved under the displayed machine number.
Then press the MACH òò
òò
òkey if you want to consult the results corresponding to other machines.
A long press allows you to scroll through the memory and machine numbers.
or EXIT The main menu is displayed again.
MACH : 001 MACH : 002 MACH : 255
MEM : 001 MEM : 002 MEM : 003
MEM : x
→
MEM : 001 MEM : 002 MEM : 003
MEM : y
→
MEM : 001 MEM : 002 MEM : 003
MEM : z
→

41
5.4. RS232 COMMUNICATION (FOR PRINTOUT AND CONNECTION TO A PC)
To print saved data or transfer them to a PC, you must use the RS232 communication function.
C2
P2C1 P1
TEST
MAINS
TEST
REMOTE
CAT III
600V
WARNING LAMP 12V~
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
230V / 50Hz
600VA
RS232C
+
ON
OFF
INSULATION (M )ΩDISCHARGE TIME ( t)∆
CONTINUITY 12V/>10A ( U,R )∆10A
DIELECTRIC (HV)
600V CAT III
C.A 6121
MACHINE TESTER
HV 500V Rmin=150M
U=513V
9min
MΩ
113.5
H
V
M
Ω
R
1
0
A
∆
t
∆
U
ARNOU X
CHAUVIN
RS232 communication cable (printer)
Serial printer
Fig.28. Connection of C.A 6121 MACHINE TESTER to a serial printer
9 pin male connector-
to C.A 6121 MACHINE TESTER
9 pin male connector-
to serial printer
22
33
55
front view front view
Fig.29. RS232 communication cable (printer)
C2
P2C1
P1
TEST
MAINS
TEST
REMOTE
CAT III
600V
WARNING LAMP 12V~
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
230V / 50Hz
600VA
RS232C
+
ON
OFF
INSULATION (M )ΩDISCHARGE TIME ( t)∆
CONTINUITY 12V/>10A ( U,R )∆10A
DIELECTRIC (HV)
600V CAT III
MEM/MR PRINT/RS / SET-UP
C.A 6121
MACHINE TESTER
MΩ500V Rmin=150MΩ
U=513V
9min60s
MΩ
113.5
TIMERRminUn
H
V
M
Ω
R
1
0
A
∆
t
∆
U
ARNOU X
CHAUVIN
RS232 communication cable (PC)
25-9 pin adapter
Fig.30. Connection of C.A 6121 MACHINE TESTER to PC (to 25 pin or 9 pin connector)
2
3
3
2
7
5
male, 25 pin female, 9 pin
9 pin male connector-
to C.A 6121 MACHINE TESTER
25 pin male connector-
to serial printer
7
3
2
2
3
5
front view
front view
Fig.31. RS232 communication cable (PC) and 25-9 pin adapter

42
■■
■■
■How to transfer stored data to serial printer or PC ?
1. Connectthe C.A6121 MACHINE TESTERto theserial printer orto thePC(see figures28 to30)using theappropriate RS232
communication cable and adapters.
2. Prepare the printer or the PC for communication.
3. Prepare the C.A 6121 MACHINE TESTER to communicate in the following way:
-Check the baud rate :
Press the SET UP key and keep it presses for 2 s approx., until the baud rte selection menu is displayed. Press the BAUD key,
then the ññ
ññ
ñor òò
òò
òkeys to set the rate = 300, 600, 1200, 2400 or 4800 bauds (equal to that of the printer or the PC).
-Press the PRINT/RS key to open the print menu and select one of the modes below (fig. 32).
Print measure :
Only the last result displayed will be printed when you press the STARTkey.
Print selection :
Only the results saved under the machine numbers 001→007 (in our example) will be
printed when you press the STARTkey. Press the CHG key then the ññ
ññ
ñ,òò
òò
òkeys to modify
the machine numbers.
Print all :
All the results will be printed when you press the STARTkey.
Print automatic :
When you select this mode, each result displayed is printed automatically at the end of
a measurement.
RS 232 :
The instrument is in communication mode and is waiting for instructions from the PC.
4. Select the print mode by pressing the òò
òò
òkey and follow the instructions below :
Print measure :
Press the STARTkey, the last result displayed before opening the print menu is printed out, then the main menu is displayed.
Print measure
Print selection
Print automatic
Print all
RS232
START
Print measure
Print selection
Print automatic
Print all
RS232
Print measure
Print selection
Print automatic
Print all
RS232
START
Print measure
Print selection
Print automatic
Print all
RS232
MACH:001 MACH:007
START
CHG
Fig. 32. Printout modes
Print measure
Print selection
Print automatic
Print all
RS232

43
Print selection :
Key used :
Machine number on the left starts flashing.
, Select start machine number.
Machine number on the right starts flashing.
, Select end machine number.
Exit selection mode.
Impression de tous les résultats enregistrés sous les numéros de machine compris entre celui de départ
et celui de fin que vous avez sélectionnés. Un symbole ∗clignote à côté du curseur du côté gauche de
l’écran pendant l’impression. Le menu principal s’affiche lorsque l’impression est terminée.
Print all :
Press the STARTkey to print all the saved results.A symbol ∗flashes next to the cursor on the left of the screen during the printout.
The main menu is displayed when the printout has finished.
Print automatic :
This function is used when you want to print each result as soon as the measurement has finished. Press the PRINT/RS key to
open the main menu and continue to carry out measurements.From then on the results will be printed automatically.
RS 232 :
Use the communication software of the PC to communicate with the PC.
Pressing the PRINT/RS exits the RS 232 mode and opens the main menu.
Communication with the PC is then not possible.
NOTES : Check the RS 232 format in chapter 3.6.
5.5ERASING THE RESULTS
To erase all or part of the saved results, the CLR function must be used. There are two erase modes:
■■
■■
■Erase all the save locations
■■
■■
■Erase the results saved under a particular machine number
■■
■■
■How to erase a part of the results saved ?
Enter memory operation mode.
Two modes are offered : CLEAR ALL and CLEAR MACH.
Select CLEAR ALL mode.
Confirm erase by pressing the CLR key; the ∗symbol is displayed during erasure, then the main menu opens.
A press on before confirming the erase operation (CLR) allows you to exit without erasing.
■■
■■
■How to erase a part of the results saved ?
Enter memory operation mode.
Two modes are offered : CLEAR ALL and CLEAR MACH.
Select the CLEAR MACH mode, the machine number to erase is displayed.
Press the MACH ññ
ññ
ñkey to select the number of your choice.
Confirm erase by pressing the CLR key; the ∗ symbol is displayed during erasure, then the main menu opens.
A press on before confirming the erase operation (CLR) allows you to exit without erasing.

44
5.6. REINITIALISING THE INSTRUMENT
■■
■■
■To reinitialise all the test parameters, please follow the procedure below:
1. Switch off the instrument by setting the ON/OFF key to the OFF position.
2. Press the SET UP key and keep it pressed while switching on the instrument.
Machine Tester followed by Hard Reset are displayed for a few moments, then the main menu opens.
NOTES : The reinitialised values of the adjustable parameters correspond to the requirements of standard EN 60204.
■■
■■
■List of the test parameters per function, with their initial value.
Function Parameter Range of adjustment Initial value
or possible values
UNTest voltage 1, 1.25, 1.5 kV AC 1 kV
1, 3, 5, 10, 20, 30, 40, 50, 60, 70,
HV Imax Tripping current 80, 90, 100, 150, 200, 250, 300, 500 mA
333, 350, 400, 450, 500 mA
tTimer 1s...1min...5 min (in steps of 1 s and 10 s) 1 s
∆U∆Umax Max permitted 5.0 V (0.50 mm2), 5.0 V (0.75 mm2),
voltage drop 3.3 V (1.0 mm2), 2.6 V (1.5 mm2), 3.3 V (1.0 mm2)
1.9 V (2.5 mm2), 1.4 V (4.0 mm2),
1.0 V ≥6.0 mm2
tTimer 1 s...15 s 10 s
R 10A AC Rmax Max permitted 10 mΩ...1000 mΩ(in steps of 10 mΩ)*mΩ
resistance or *mΩ(no limit)
tTimer 1s...15 s 10 s
UNTest voltage 500, 1000 V DC 500 V DC
Rmin min. allowed 0.2 MΩ...1 MΩ(in steps of 0.1 MΩ)
MΩinsulation 1 MΩ...10 MΩ(in steps of 1 MΩ)1 MΩ
resistance 10 MΩ...500 MΩ(in steps of 10 MΩ)
or *Ω(no limit)
tTimer 2 s...1min...10 min (in steps of 1 s and 10 s) 15 s
∆tSyst Measuring 2-point (1 s), 4-point (5 s) 2-point (1 s)
system
tTimer ON ou OFF ON
ON/OFF (M/A)
Toutes Baud Baud rate 300, 600, 1200, 2400, 4800 4800
fonctions Buzzer ON/OFF ON
Contrast 0%...100% (in steps of 2%) 50%
■■
■■
■To reinitialise all the test parameters and erase all stored data, please follow the procedure below :
1. Switch off the instrument by setting the ON/OFF key to the OFF position.
2. Press the SET UP and MEM/MR keys and keep them pressed while switching on the instrument.
Machine Tester then Hard Reset followed by Clear Memory are displayed for a few moments, then the main menu opens.
NOTES : The reinitialised values of the adjustable parameters correspond to the previous table,in accordance with
standard EN 60204.