AOIP-Megohmmeter – Ohmmeter (Model: 200)

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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

Resource & Download

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