OM 10

picto fleche Portable micro-ohmmeter up to 50 KΩ and 100 mA

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.

  • 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 or pulse measurement current for non-selfic resistances
  • Automatic compensation of thermal E.M.F.
  • Temperature compensation
  • Metal temperature compensation
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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

Measuring rangeResolutionAccuracy (1 year)
(23°C ±5°C)
Measuring currentVoltage drop
500 mΩ10 μΩ0.05% + 50 μΩ100 mA50 mV
5 Ω0.1 mΩ0.05% + 0.5 mΩ10 mA50 mV
50 Ω1 mΩ0.05% + 5 mΩ10 mA500 mV
500 Ω10 mΩ0.05% + 50 mΩ1 mA500 mV
5 KΩ100 mΩ0.05% + 0.5 Ω0.1 mA500 mV
50 KΩ1 Ω0.05% + 5 Ω0.01 mA500 mV

Accuracy given in % of reading + fixed value at 23°C ±5°C
Temperature coefficient beyond operating range: < 10% accuracy/°C (from 0 to18°C and from 28 to 50°C)
Open circuit voltage: < 8 V
Resistance of the connection cables: < 20 Ω

Voltage measurement

RangeResolutionAccuracy (1 year)
(23°C ±5°C)
400 V1 V1% + 1 V

Accuracy given in % of reading + fixed value at 23°C ±5°C

Temperature measurement

RangeResolutionAccuracy (1 year)
(23°C ±5°C)
-10 to 60°C0.1°C1.5°C

Accuracy given in % of reading + fixed value at 23°C ±5°C

Further features

Resistance types
  • Inductive resistances: Coils, transformers, motor windings...
  • Non-inductive resistances: Earth bonding, coating, contact resistances...
Measuring currentDC current from 0.01 mA to 100 mA
Continuous ou pulsed
Measuring time0.5 s in continuous current mode or 1 s in pulsed mode
EMFsAutomatic compensation of EMF parasites before each measurement for a greater accuracy
Temperature compensationChoice of metal temperature coefficient
Choice 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

Size120 x 65 x 245 mm
Weight1.1 Kg
DisplayLCD, 50,000 counts,13 mm high
Power supply10 to 20 V 0.5 A
Internal batteriesType: Ni/Cd 1.7 Ah
Charging time: 14 h
Battery life: 10 h over 500 mΩ range

Environmental specifications

Reference range23°C ±5°C (45 to 75% w/o condensing)
Operating reference range0 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 protectionIP52 according to EN60529

Safety specifications

Protections
  • 400 V peak when measuring resistances
  • 600 V peak when measuring voltages
  • Protection against ‘current’ circuit breaking during inductive resistance measurements
ClassIn accordance with EN 61010-1
Category III, pollution 2
Rated voltage 400 V
Chocks and vibrationsEN61010-1
EMC conformityImmunity:

  • EN 50082-1/1992
  • Radiated: CEI 801-3/1984
  • Conducted: CEI 801-4/1988.
  • Electrostatic discharges : CEI 801-2/1991

Conducted and radiated emissions:

  • EN 55022, class B

 

Instrument:

OM10                    On-site micro-ohmmeter

Clips and probes:

Please note that 2 clips are needed per OM 10.

AN5806-2               Gold plated Kelvin clips, set of 2

Opening diameter: 12 mm, cable length: 2 m

AN5806C               Kelvin clips, set of 2

Opening diameter: 12 mm, cable length: 3 m

AMT003                 Test probe, per unit

Cable length: 5 m

AMT004                 Kelvin clip, per unit

Opening diameter: 25 mm, cable length: 3 m

Certification:

QMA11EN              COFRAC certificate of calibration

ProductDescriptionReleaseType
Accessories

Brochure for clips, probes and further accessories

07 / 2014pdf
OM 10

Instruction manual

pdf