OM 10
OM 10 portable micro-ohmmeter performs 4-wire measurements of inductive and non-inductive resistances up to 50 KΩ with continuous or pulse measuring current up to 100 mA. It works at a resolution of 10 µΩ and an accuracy of 0.05%. The accuracy of measurements is also ensured by the automatic compensation of thermal electromagnetic forces, the compensation of ambient temperature (internal sensor) at 20°C and by the selection of the metal type.
OM 10 can also measure DC and AC voltages up to 400 V.
Key-features :
- 4-wire resistance measurement up to 50 KΩ at 10 µΩ resolution and 0.05% accuracy
- Voltage measurement up to 400 V at 1 V resolution and 1% accuracy
- Continuous measurement current for inductive loads: Coils, transformers, motor windings, twisted cables…
- Pulse measurement current for non-selfic resistances: Earth bonding, ground continuity, contact resistances, non-twisted cables…
- Automatic compensation of thermal E.M.F.
- Temperature compensation
- Metal temperature compensation
Applications :
- Cable resistance and resistivity measurement
- Inductive resistance measurement (transformers, motors…)
- Contact resistance measurement (connectors, switches, relays…)
- Metallisation, earth bounding and ground continuity tests
- Tests of low power electrical components (fuses…)
- Tests of heat-sensitive devices
- Tests of surface states, mechanical bonds and materials
Resistance measurement
Voltage measurement
Temperature measurement
Further features
General specifications
Environmental specifications
Safety specifications
| Measuring range | Resolution | Accuracy (1 year)(23°C ±5°C) | Measuring current | Voltage drop |
|---|---|---|---|---|
| 500 mΩ | 10 μΩ | 0.05% + 50 μΩ | 100 mA | 50 mV |
| 5 Ω | 0.1 mΩ | 0.05% + 0.5 mΩ | 10 mA | 50 mV |
| 50 Ω | 1 mΩ | 0.05% + 5 mΩ | 10 mA | 500 mV |
| 500 Ω | 10 mΩ | 0.05% + 50 mΩ | 1 mA | 500 mV |
| 5 KΩ | 100 mΩ | 0.05% + 0.5 Ω | 0.1 mA | 500 mV |
| 50 KΩ | 1 Ω | 0.05% + 5 Ω | 0.01 mA | 500 mV |
Voltage measurement
| Range | Resolution | Accuracy (1 year)(23°C ±5°C) |
|---|---|---|
| 400 V | 1 V | 1% + 1 V |
Temperature measurement
| Range | Resolution | Accuracy (1 year)(23°C ±5°C) |
|---|---|---|
| -10 to 60°C | 0.1°C | 1.5°C |
Further features
| Resistance types | Inductive resistances: Coils, transformers, motor windings...Non-inductive resistances: Earth bonding, coating, contact resistances... |
|---|---|
| Measuring current | DC current from 0.01 mA to 100 mAContinuous ou pulsed |
| Measuring time | 0.5 s in continuous current mode or 1 s in pulsed mode |
| EMFs | Automatic compensation of EMF parasites before each measurement for a greater accuracy |
| Temperature compensation | Choice of metal temperature coefficientChoice of ambient temperature (programmed or measured with internal sensor)Temperature compensation at 20°C: Resolution: 0.1°C, accuracy: ±0.5°C(R20 = Resistance compensated at ambient temperature equal to 20°C) |
General specifications
| Size | 120 x 65 x 245 mm |
|---|---|
| Weight | 1.1 Kg |
| Display | LCD, 50,000 counts,13 mm high |
| Power supply | 10 to 20 V 0.5 A |
| Internal batteries | Type: Ni/Cd 1.7 AhCharging time: 14 hBattery life: 10 h over 500 mΩ range |
Environmental specifications
| Reference range | 23°C ±5°C (45 to 75% w/o condensing) |
|---|---|
| Operating reference range | 0 to 50°C (RH: 20 to 75% w/o condensing) |
| Limit operating range | -10°C to +55°C (RH: 10 to 80% w/o condensing) |
| Storage temperature limits | -30°C to +60°C(-15°C to +50°C with battery charged) |
| Indice de protection | IP52 according to EN60529 |
Safety specifications
| Protections | 400 V peak when measuring resistances600 V peak when measuring voltagesProtection against ‘current’ circuit breaking during inductive resistance measurements |
|---|---|
| Class | In accordance with EN 61010-1Category III, pollution 2 |
| Rated voltage | 400 V |
| Chocks and vibrations | EN61010-1 |
| EMC conformity | Immunity:EN 50082-1/1992Radiated: CEI 801-3/1984Conducted: CEI 801-4/1988.Electrostatic discharges : CEI 801-2/1991Conducted and radiated emissions:EN 55022, class B |
