Testboy TV 455 - R LOWΩ, 200 Ma Resistance Measurement

®
TV 450/455 Resistance of earth connection
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5.3.1 R LOWΩ, 200 mA resistance measurement
The resistance measurement is performed with automatic polarity reversal of the test
voltage.
Test circuit for R LOWΩ measurement
Figure 5.9: Connection of 3-wire test lead plus optional extension lead
Resistance to earth connection and equipotential bonding measurement procedure
 Select continuity function using the function selector switch.
 Set sub-function to R LOWΩ.
 Enable and set limit (optional).
 Connect test cable to the instrument.
 Compensate the test leads resistance (if necessary, see section 5.3.3).
 Disconnect from mains supply and discharge installation to be tested.
 Connect the test leads to the appropriate PE wiring (see figure 5.9).
 Press the TEST key to perform the measurement.
 After the measurement is finished store the result by pressing the MEM button.
Figure 5.10: Example of RLOW result
Displayed result:
R................R LOWΩ resistance.
R+..............Result at positive polarity
R-...............Result at negative test polarity