Megger TDR1000/2 Guide De L'utilisateur page 9

User controls and display
Power: Pressing this button will turn the
instrument on or off depending on its
current state.
Range: A bi-directional button allowing
range adjustment from 10m (30ft) to 3km
(10 000ft) in 6 steps. The bi-directional
feature allows ranges to be selected
forward and backward, without having
to scroll through all the ranges in one
direction
Gain: This control is used to increase or
decrease the gain of the instrument. This
helps the user identify faults over the entire
cable length.
Velocity Factor:
Factor (VF) of the instrument to match that
of the cable under test.
IMPORTANT:
the VF of the cable under test to give an
accurate distance measurement.
Adjusts the Velocity
The VF value must match
Menu: Allows the user to change the
units of measurement for Distance, Velocity
Factor, Impedance and Test Rate. Refer to
menu section later in this text.
Backlight: Pressing this button will toggle
the backlight on and off. The backlight will
automatically switch off after 1 minute
Contrast: Allows the user to manually
correct the display contrast to suit local
ambient lighting conditions.
Output Sockets: 4mm shrouded sockets designed
to accept the leads supplied with the instrument.
Battery cover:
Located on the back of the
instrument and provides the user with access to
the battery compartment. The cover must not be
removed while the instrument is switched on or
connected to a cable. The instrument must not be
operated with the cover open.
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