The MEGOHM 200 is a multi-purpose electronic
resistance measurement instrument particularly suited for maintenance,
verification and reception of telephone lines, and more generally of
all low voltage cables.
It measures insulation resistance, loop resistance, AC and DC voltage and detects threshold crossings.
- Analogue and digital megohmmeter
- Analogue and digital continuity ohmmeter
- Adjustable test voltage from 50 to 500 V
- Rugged, lightweight and IP54 for onsite use
Specifications and performances @23°C ±1°C
Insulation resistance measurement at test voltage of 50 to 300 V adjustable by steps of 25 V
| Analogue range |
Digital range |
Analogue accuracy |
Digital accuracy / 1 year |
| Range |
Measured resistance |
Resolution |
| 0.01 MΩ to 1 GΩ |
0.00 MΩ to 99.50 MΩ |
0 to 10 MΩ |
0.01 MΩ |
±1 segment |
5% RDG + 0.01 MΩ |
| 10 to 30 MΩ |
0.05 MΩ |
| 30 to 50 MΩ |
0.10 MΩ |
10% RDG |
| 50 to 100 MΩ |
0.5 MΩ |
| 100.0 MΩ to 1000.0 MΩ |
100 to 200 MΩ |
1.0 MΩ |
| 200 to 400 MΩ |
5.0 MΩ |
| 400 to 700 MΩ |
10.0 MΩ |
| 700 to 1000 MΩ |
20.0 MΩ |
Insulation resistance measurement at test voltage of 300 to 500 V adjustable by steps of 50 V
| Analogue range |
Digital range |
Analogue accuracy |
Digital accuracy / 1 year |
| Range |
Measured resistance |
Resolution |
| 0.03 MΩ to 10 GΩ |
0.00 MΩ to 995.0 MΩ |
0 to 100 MΩ |
0.01 MΩ |
±1 segment |
5% RDG + 0.01 MΩ |
| 100 to 300 MΩ |
0.05 MΩ |
| 300 to 500 MΩ |
0.10 MΩ |
10% RDG |
| 500 to 995 MΩ |
0.5 MΩ |
| 1000 MΩ to 10000 MΩ |
1000 to 2000 MΩ |
1.0 MΩ |
| 2000 to 4000 MΩ |
5.0 MΩ |
| 4000 to 7000 MΩ |
10.0 MΩ |
| 7000 to 10000 MΩ |
20.0 MΩ |
500 V constant voltage for insulation > 5 MΩ
Continuity resistance, loop resistance measurement
| Analogue range |
Digital range |
Analogue accuracy |
Digital accuracy / 1 year |
| Range |
Measured resistance |
Resolution |
| 0.03 Ω to 10 kΩ |
0.0 Ω to 995.5 Ω |
0 to 100 Ω |
0.1 Ω |
±1 segment |
0.5% RDG + 0.02 Ω |
| 100 to 500 Ω |
0.2 Ω |
| 500 to 995,5 Ω |
0.5 Ω |
| 1000 Ω to 10000 Ω |
1000 to 2000 Ω |
1 Ω |
| 2000 to 3000 Ω |
2 Ω |
| 3000 to 5000 Ω |
5 Ω |
| 5000 to 10000 Ω |
10 Ω |
Measuring current: < 1 mA
Visual and sound signal on continuity threshold crossing
DC voltage measurement
| Measurement range |
Resolution |
Accuracy / 1 year |
| 0 to 100 V |
0.1 V |
±1% RDG + 0.5 V |
| 100 to 300 V |
1 V |
±1% RDG + 1 V |
Input impedance: 200 kΩ
Digital display: 3 digits
AC voltage measurement
| Measurement range |
Resolution |
Accuracy / 1 year |
| 0 to 100 V |
0.1 V |
±1% RDG + 0.5 V |
| 100 to 300 V |
1 V |
±1% RDG + 1 V |
Input impedance: 200 kΩ
Digital display: 3 digits
Bandwidth: 40 à 400 Hz
Additional specifications
| Measurement stabilization time |
< 2 seconds for line capacitance of 1 µF |
| Auto-discharge feature |
Auto-discharge feature for line capacitance at the end of a measurement |
| Threshold detection |
Threshold detection for resistance and insulation measurements with sound and visual signal when crossed |
General specifications
| Size |
210 x 110 x 50 mm |
| Weight |
900 g |
| Display |
240 x 320 pixel liquid crystal graphical display with backlite and contrast control
Analogue display: bargraph 67 segments with 5-decade logarithmic scale
Digital display: 4 digits |
| Connexion |
2 safety 4 mm plugs |
| Power supply |
230 V ±10 %, 50/60 Hz |
| Automatic switch off |
Automatic switch off of the instrument after 30 minutes without action |
| Battery |
Type: Li/Ion
Charging time: 4 h
Lifetime: 4,500 tests of 5 s at 500 V with a resistance ≥ 0.5 mΩ |
Environmental specifications
| Reference range |
23°C ±1°C (RH: 45 to 75 % w/o condensing) |
| Operating reference range |
-10 to 50°C (RH: 20 to 80 % w/o condensing) |
| Limit operating range |
-15°C to +55°C (RH: 10 to 80 % w/o condensing) (70% at 55°C) |
| Storage temperature limits |
-30°C to +60°C |
| Maximum height |
0 to 2000 m |
| IP protection |
IP54 according to EN60529 |
Safety specifications
| Protection |
When using insulation measurement function at 50 V and
500 V, measuring voltage is applied on line only while measuring key
is pressed. When the key is released, the cable is automatically
unloaded within 1sec.
Overload protection up to 380 V |
| Class |
In accordance with EN 61010-1
Category II, pollution 2 |
| Chocks and vibrations |
EN 61010-1 |
| EMC conformity |
Immunity:
- EN 61000-4-2
- EN 61000-4-3
- EN 61000-4-5
- EN 61000-4-6
- EN 61000-4-11
EN 61000-4-4
Conducted and radiated emissions:
- EN 55022, class B
- EN 61000-3-2
- EN 61000-3-3
|
Model and Accessories
Instrument:
MEGOHM 200 Cable fault locator
Delivered in standard with:
- Set of testing leads and crocodile clips
- User manual
- Transport case, shoulder strap and stand
Packing information:
Size 210 x 110 x 50 mm
Weight 900 g
