Model 5894 Wide Range Precision Ohmmeter


  • Measurement range 1.0000 mOhm to 100.00 kOhm
  • Resolution 0.1µOhm
  • 0.03% Accuracy
  • RS232 interface
  • Printer interface
  • PLC interface
  • Programable limits

For more information about this product contact Tinsley

With a wide measurement range the new Tinsley 5894 is suitable for applications that require either a milli-ohmmeter or micro-ohmmeter. The robust design is suitable for workshop or laboratory use. It has an impressive range of features included as standard. Two measurement modes are available: “Fast” for normal resistance and automated processes and “Slow” for the accurate measurement of inductive devices such as motor and transformer windings. The instrument is also provided with an input protection circuit to guard against voltage spikes that can occur when measuring inductive components. By simply connecting a resistance thermometer, measurements of copper and aluminium can be made relative to 20°C. A special feature to limit the open circuit voltage to less than 20mV is included to enable “Dry contact resistance” measurements to be made.

See the table below for a run-down of this product's specifications.

(Manual or Automatic)

1.0000mOhm to 100.00kOhm



Over range

80% to 18,000

Max. Uncertainty

0.03% read. + 2dgt

Measuring Speed/Time

10 measurements/second

4-½ digits
Current @ 1 mOhm 1 A
10 mOhm 1 A
100 mOhm 100 mA
1 Ohm 10 mA
10 Ohm 1 mA
100 Ohm 1 mA
1 kOhm 100 μA
10 kOhm 100 μA
100 kOhm 10 μA
Measuring Voltage

4V (20mV limit for contacts)

Max. Inductive Power

< 100 VA

Temperature Comp.

With PT100 Probe Range 20°C/23°C

Temp. coefficient

Off, Cu or Al

Zero Correction

Compensated at each measurement

Input Protection

Against inductive spikes

Error detection display and message (RS232)

Open potential leads: ‘SEN’ (‘ESEN’)

Open current leads: ‘CUR’ (‘ECUR’)

Over range >80%: ‘OVR’ (‘EOVR’)


0... 18,000 upper/lower

Limits overrun display and message (RS232)

> or < in front of measured value
'>’ or ‘<’ as first sign of message

Limit settings

Manual (keys) or RS232


RS232, Parallel Printer, PLC

Measuring Start Via

Key, RS232, PLC, Potential free contact


280 x 80 x 240 mm (W x H x D)


Approx. 3kg


-10°C to 40°C
-20°C to 60°C
<95% Humidity, not condensing

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