Megohmmeters 5kV
C.A 6545 / C.A 6547
SALES PRODUCT INFORMATION
Electrical testing and safety
Cécile Le Goué
PC_F_ CA 6545/47 - 1
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TEST & MEASUREMENT DIVISION
The Experts in insulation at 5kV
PC_F_ CA 6545/47 - 2
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TEST & MEASUREMENT DIVISION
Measurements
C.A 6545
C.A 6547
INSULATION
Predetermined test voltages :
500-1000-2500-5000V
Programmable test voltage :
40 à 5100V (pas 10V/100V)
VOLTAGE
30 kW…10 TW
10 kW…10 TW
25…5100 V DC (15..500 Hz)
CAPACITANCE
0,005…49,99 µF
LEAKAGE CURRENT
0,000…3000 µA
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TEST & MEASUREMENT DIVISION
Functional specifications
C.A 6545
Automatic calculation of DAR &
PI ratios
Automatic calculation of DD
(Dielectric Discharge test)
Yes, DAR & PI
Yes, DD = I1mn / (Test voltage x C)
Yes
Programming of test duration
R(t) function
C.A 6547
Limited to 20 samples
With 128 kbyte
SMOOTH function
Yes
Programmable alarms
Yes
Exact test voltage measured
Yes
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TEST & MEASUREMENT DIVISION
Other specifications
C.A 6545
C.A 6547
Memory
-
Yes, with 128 kbyte
RS232
-
Yes, bi-directionnal
Supply
NiMH rechargeable battery
Yes
Battery charge status indicator
Backlit screen + bargraph
Electrical safety
Dimensions
Yes
IEC 1010-1 Cat.III 1000V (or Ca.I 2500V)
+ EN 61557
270 x 250 x 180 mm
4 300 g
Weight
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TEST & MEASUREMENT DIVISION
A special built-for-the-field design
Clamps and plugs are perfectly
insulated and measurement leads
are 3m long.
A 3m guard lead is also supplied for
high-insulation measurements.
A tool-bag containing all
accessories
A site-adapted
hard casing, IP
67 when closed
and IP 53 when
opened
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TEST & MEASUREMENT DIVISION
A studied ergonomic design
Test voltage selection by rotary
switch:
• 4 pre-determined test voltages:
500 V
1000V
2500V
5000V
• 1 programmable test voltage
position: 40 to 5100V in 10V or 100V
steps
Measurement and function selection
by pressing on a push-button
A giant backlit LCD screen with
digital display + bargraph
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TEST & MEASUREMENT DIVISION
For an excellent quantitative analysis...
 INSULATION measurement to 10 TW
 VOLTAGE measurement to 5100 V
 CAPACITANCE measurement of the tested circuit
 LEAKAGE CURRENT measurement
and qualitative analysis...
 automatic calculation of DAR, PI and DD ratios
 R(t) graph plotting
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TEST & MEASUREMENT DIVISION
Reminder
Insulation resistance measurement qualifies the degree of
insulation in installations or equipment. It also serves as a basis
for preventive maintenance.
Insulation measurement is very sensitive to variations in temperature and
humidity. While testing, measurement is also initially influenced by
unwanted currents.
So, it is best to carry out :

quantitative measurement of long duration: provided by
mode "Time-controlled testing"
and R(t) graph plotting

a qualitative analysis with calculation of DAR, PI and DD
ratios.
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TEST & MEASUREMENT DIVISION
Reminder
*
DAR, PI ?
A qualitative analysis can turn out to be more clever and reliable than a simple
quantitative analysis: the calculation of DAR and PI ratios enable the user to ignore
climatic conditions and unwanted currents liable to invalidate measurement results.
reminder :
DAR = R 1mn / R 30s
&
PI = R 10mn / R 1mn
*
DD ?
This test is especially suited for measurement on heterogeneous and multi-layer
insulation, for it can reveal a defective layer among layers with high resistance. We
recommend charging the insulator with 500V for 30 minutes.
DD =
I1mn (current measured after 1mn (mA))
Test voltage (Volt) x Capacitance measured (Farad)
* R(t) graph plotting :
when a time-controlled test begins, measured insulation samples are automatically
memorized. It is possible to follow insulation evolution in function to the test voltage's
application duration. Then R(t) graph can then be plotted out either by hand or directly
on a PC screen using the MégohmView software.
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TEST & MEASUREMENT DIVISION
To order
C.A 6545…………………………………………P01.1397.01
C.A 6547…………………………………………P01.1397.02
delivered complete with tool-bag containing accessories :
- 2 x 3 m safety leads with HV plug and HV crocodile clip
(red/blue)
- 1 x 3 m safety guard lead with HV rear pick up plug and HV
crocodile clip (black)
- 1 x 0.35 m rear pick up lead (blue)
- 1 x 2 m mains supply lead
- 1 user's manual in 5 languages code 689 439 A00
- 5 plastic-coated, two-sided condensed user's manual
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TEST & MEASUREMENT DIVISION
Accessories & replacement parts
8 m HV blue crocodile clip lead
8 m HV red crocodile clip lead
8 m HV black crocodile clip rear pick up lead
15 m HV blue crocodile clip lead
15m HV red crocodile clip lead
15 m HV black crocodile clip rear pick up lead
PC Software for C.A 6547
Serial printer
Serial-to-parallel adapter
3 x 3m HV crocodile clip leads (blue / red / guarded black)
0.35 m rear pick up lead (blue)
Tool-bag
2 m mains supply lead
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TEST & MEASUREMENT DIVISION
P01.2952.14
P01.2952.15
P01.2952.16
P01.2952.17
P01.2952.18
P01.2952.19
P01.1019.38A
P01.1029.03
P01.1019.41
P01.2952.20
P01.2952.21
P01.2980.61
P01.2951.74