MI 3321 MultiservicerXA
Machine testing operating mode
120
9.2.2.3
Compensation of test leads resistance
Test leads compensation is required to eliminate the influence of test leads resistance
and instrument's internal resistance. If a compensation value is stored this is indicated
in the message
C
.
Circuit for compensating the resistance of test leads
Shorted test leads
Compensation of test leads resistance procedure
Select the
CONTINUITY
function
Select the
Single mode
test
Connect
test cable to the instrument and short test leads (see figure above).
Press the
CAL
(F3) key for measurement.
If the calibration was performed successfully, 0.00
Ω is displayed.
Notes:
5 Ω is the limit value for resistance compensation. If the resistance is higher then
the calibration value is reset to the default value and the message disappears.
Both 10 A and 200 mA continuity functions are compensated at the same time.
The lead compensation is very important to obtain correct result especially if long
test leads are used.
9.2.3
Insulation resistance
Insulation resistance between live conductors and accessible (earthed or isolated) metal
parts is checked. This test discloses faults caused by pollution, moisture, deterioration
of insulation metal etc.
Insulation resistance menu
