Safety Test Functions; Lowω: Continuity Test With 200Ma Test Current - MARTINDALE VR2250 User Instruction Manual

6. SAFETY TEST FUNCTIONS

6.1. LOWΩ: CONTINUITY TEST WITH 200mA TEST CURRENT
The measurement is performed according to EN 61557-2 and VDE 0413 part 4.
Before carrying out the continuity test make sure that there is no voltage at the
ends of the conductor under test.
Turn the switch to the LOW Ω position.
This key permits you to select one of the following measuring modes:
Mode "AUTO" (the instrument carries out two measurements with
reversed polarity and displays their average value). This mode is
recommended for the continuity test.
Mode "RT+" (measurement with positive polarity and possibility of setting
the duration time of the test). In this case the operator can set a
measuring time long enough to permit him to move the protective
conductors while the instrument is carrying out the test so detecting any
bad connection.
Mode "RT-" (measurement with negative polarity and possibility of setting
the duration time of the test). In this case the operator can set a
measuring time long enough to permit him to move the protective
conductors while the instrument is carrying out the test so detecting any
bad connection.
This key permits to execute the "CAL" mode (compensation of the resistance
of the cables used for the measurement).
If the resistance is lower than 5Ω (including the resistance of the calibration)
the continuity test is executed by the instrument with a test current higher
than 200mA. If the resistance is higher than 5Ω the continuity test is
executed by the instrument with a current lower than 200mA.
We recommend that you check the Calibration of the test leads before executing a
measurement according to the next paragraph (6.1.1).
CAUTION
CAUTION
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