Operation Manual

MI 3121H Smartec 2,5 kV Insulation / Continuity Continuity

5.2.3 Compensation of test leads resistance

This chapter describes how to compensate for test leads resistance in both continuity

functions (RLOW and CONT). Compensation is required to eliminate the influence of test

leads resistance and the internal resistances of the instrument on the measured

resistance. The lead compensation is therefore a very important feature to obtain correct

result. Once compensation has been performed, the compensation symbol ( ) appears

on the screen.

Each of RLOW and CONT has each own compensation.

Circuits for compensating the resistance of test leads

Figure 5.16: Shorted test leads

Compensation of test leads resistance procedure

 Select the any continuity function using the function switch.

 Connect test lead to the top of the instrument and short the test leads together

(see Figure 5.16).

 Press TEST to perform resistance measurement.

 Press the CAL key to compensate leads resistance.

Note:

 The limit value for lead compensation is 5 Ω.