5891 Digital Micro ohmmeter.
Contact resistance measurement with or without voltage limits (20 mV or 50 mV);
Ground continuity and cable resistance measurements;
Inductive resistance measurements in transformers, alternators, etc.;
Quotient measurements using a current source and external resistance standard.
Versions available:
- 5891-1: Basic model (power supply and RS 232).
- 5891-2: Basic model with battery and charger.
- 5891-3: Basic model with IEEE-488 interface.
- 5891-4: Basic model with battery, charger and IEEE-488 interface.

• Languages available: English, French,
  German, Spanish, Italian.

• 22-key pad covering all operating and
  programming functions.

• Audible warning (beep) of any incorrect
  operation when programming.

• Display of error messages in case of overload,
  overrange or incorrect connections.

• Measurement terminals duplicated on rear for
  rack mount operation.

• Direct reading of measurement and units: µΩ, mΩ, Ω, kΩ, %, °C.

• 18 measurement ranges

• Selection of the measurement current

Three operating modes:
. direct current (except with 10 A range),
. pulsed current,
. alternate current (current flow inversion).
- Relative mode value read-out (DR or DR/R).
- Programming directly by metal type or by temperature coefficient
offers the following advantages:
. automatic heat measurement of the component under test;
. automatic compensation of its temperature, either by program or by measurement using a platinum probe.
- The RS 232-D or IEEE-488 interfaces allow programming, measurement processing and unit calibration from a computer as well as measurement output to a printer.
- Measurement storage on request (1 000 values max.) with min, max. and average values displayed or sent to the interfaces.