Testboy TV 455VDE-tester Testboy TV 455 Manuel D’Utilisation

Codes de produits

Testboy TV 455

TESTBOY TV 450

Resistance of earth connection

5.3.2 Continuous resistance measurement with low current (model TESTBOY TV

450 (TYPE B))

In general, this function serves as standard

Ω-meter with a low testing current. The

measurement is performed continuously without polarity reversal. The function can also
be applied for testing continuity of inductive components.

Test circuit for continuous resistance measurement

Figure 5.11: 3-wire test lead application

Continuous resistance measurement procedure

Select continuity function using the function selector switch.

Set sub-function CONTINUITY.

Enable and set the limit (optional).

Connect test cable to the instrument.

Compensate test leads resistance (if necessary, see section 5.3.3).

Disconnect from mains supply and discharge the object to be tested.

Connect test leads to the tested object (see figure 5.11).

Press the TEST key to begin performing a continuous measurement.

Press the TEST key to stop measurement.

After the measurement is finished, store the result (optional).

Figure 5.12: Example of continuous resistance measurement

Displayed result:

R............Resistance

Note:

Continuous buzzer sound indicates that measured resistance is less than 2

Ω.