Megger TDR1000/2 Guide De L'utilisateur page 8

User controls and display
Find key: Automatically moves the cursor to
the first potential fault (change of impedance).
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: Adjusts the Velocity Factor
(VF) of the instrument to match that of the
cable under test.
IMPORTANT: The VF value must match the
VF of the cable under test to give an accurate
distance measurement.
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
o p e n .
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