METREL EurotestCOMBO MI 3125 - Compensation of Test Leads Resistance

MI 3125 / BT EurotestCOMBO Measurements
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Displayed result:
R............Resistance
Notes:
 Continuous buzzer sound indicates that measured resistance PASS the limit.
 There is no sound if the limit is disabled (---).
5.3.3 Compensation of test leads resistance
This chapter describes how to compensate the test leads resistance in both continuity
functions, R LOWΩ and CONTINUITY. 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.
R LOWΩ and CONTINUITY has common compensation. symbol is displayed if the
compensation was carried out successfully.
Circuits for compensating the resistance of test leads
Figure 5.13: Shorted test leads
Compensation of test leads resistance procedure
 Select R LOWΩ or CONTINUITY function.
 Connect test cable to the instrument and short the test leads together (see figure
5.13).
 Press TEST to perform resistance measurement.
 Press the CAL key to compensate leads resistance.
Figure 5.14: Results with old calibration
values
Figure 5.15: Results with new calibration
values
Note:
 The highest value for lead compensation is 5 . If the resistance is higher the
compensation value is set back to default value.
is displayed if no calibration value is stored.