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Megohmmeters
General characteristics
Testing and maintenance of industrial equipment
• Large measurement range from 10 kΩ to 10 TΩ
• Large backlit LCD screen, with digital display and bargraph
• Fixed test voltages and programmable test voltages from 40 V to 5,100 V
• Quantitative and qualitative insulation analysis
• Automatic calculation of the DAR / PI /DD quality ratios
• Step voltage mode
• Calculation of the result R at a reference Temperature
Main applications
• Insulation measurement on cables, motors, generators, transformers…2 levels ofdiagnostics:
– "Go/No go" measurement
Qualitative measurement for preventive maintenance:
- Testing with programmed duration
- Quality ratios: polarization index (PI) & dielectric absorption ratio (DAR)
- Insulation testing on heterogeneous or multi-layer cables (dielectric discharge index)
- Step voltage
• Locking of test voltages: ideal when entrusting the instrument to less experienced users
• Measurement voltage selectable from 40 to 5,100 V to deal with all types of measurement situations.
• Possibility of storing the results in the memory and exporting the data by means of software to keep a log of the measurements
SPECIFICATIONS
|
INSULATION
|
Fixed test voltages: 500 / 1,000 / 2,500 / 5,000 V Adjustable test voltage: 40 V to 5,100 V in 10 or 100 V increments Ranges: 500 V: 10 kΩ to 2 TΩ 1,000 V: 10 kΩ to 4 TΩ 2,500 V: 10 kΩ to 10 TΩ 5,000 V: 10 kΩ to 10 TΩ |
|
VOLTAGE
|
1 to 5,100 V (15 Hz to 500 Hz or DC) |
|
CAPACITANCE |
0.001 to 49.99 F |
|
LEAKAGE CURRENT |
0.000 nA to 3,000 A |
|
Functions |
|
|
Display |
Graphic |
|
Backlighting |
YES |
|
Programmable alarms |
YES |
|
Smoothing of display |
YES |
|
Prog. test duration |
YES |
|
Calculation of ratios |
DAR - PI and DD |
|
Step voltage mode |
5 steps |
|
Calc. of R at reference T° |
YES |
|
Locking of test voltage |
YES |
|
R(t) |
Directly on the display |
|
Storage |
128 kB |
|
RS 232 |
Two-way |
|
PC software |
DataView® |
|
Power supply |
Rechargeable NiMH battery |
|
Battery life
|
30 days with 10 DARs and 5 PIs / day
|
|
Electrical safety |
IEC 61010-1 (Cat. III 1,000 V or Cat. I 2,500 V) and 61557 |
|
Dimensions |
270 x 250 x 180 mm |
|
Weight |
4.3 kg |