TESTBOY TV 450
Resistance of earth connection
34
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
.
