Testboy TV 455 - Instrument Operation; Function Selection

®
TV 450/455 Function selection
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4 Instrument operation
4.1 Function selection
For selecting test function the FUNCTION SELECTOR shall be used.
Keys:
FUNCTION
SELECTOR
Select test / measurement function:
 <VOLTAGE TRMS> Voltage and frequency and phase sequence.
 <R ISO> Insulation resistance.
 <R LOWΩ> Resistance of earth connections and bondings.
 <Zline> Line impedance
 <Zloop> Fault loop impedance.
 <RCD> RCD testing.
 <EARTH RE> Resistance to earth.
 <SETTINGS> General instrument settings.
UP/DOWN
Selects sub-function in selected measurement function.
TAB
Selects the test parameter to be set or modified.
TEST
Runs selected test / measurement function.
MEM
Stores measured results / recalls stored results.
Keys in test parameter field:
UP/DOWN
Changes the selected parameter.
TAB
Selects the next measuring parameter.
FUNCTION SELECTOR
Toggles between the main functions.
MEM
Stores measured results / recalls stored results.
General rule regarding enabling parameters for evaluation of measurement / test result:
OFF
No limit values, indication: _ _ _.
Parameter
ON
Value(s) – results will be marked as PASS or FAIL in
accordance with selected limit.
See Chapter 5 for more information about the operation of the instrument test functions.