Megger SG32-1500M, User Manual

Page: 73 / 76

OPERATION OF THE MTDR100
SG32-UG-EN-V01 Dec 2016
63
Arc Reflection Multi-shot
ONLY available following a just finished Arc Reflection measurement
or after loading a stored Arc Reflection trace from memory.
In Arc Reflection Multi-shot , the
operator is able to scroll through up to
1028 (dependent on range) Arc Reflection
traces, taken during the arc period.
The selected trace is shown on the top
status line on the far right side and
identified by a consecutive number as:
Different traces can be selected by rotating
the jog-dial.

Range: Select by depressing jog-dial.
Allows the operator to set the MTDR to
the desired range (TDR 100m to 55km)
(Transient 100-200km).
It is recommended that
a higher range than the anticipated length of the
cable is used.
 Pulse Width: Select by depressing jog-dial.
Allows the operator to set the pulse width
of the outgoing pulse from 50ns to 10µS or
select Auto whereby the pulse width is
automatically selected as determined by the
range.
 Gain: Select by depressing jog-dial.
Allows the operator to adjust the amount
of gain to be applied to the displayed trace.

Velocity: Select by depressing jog-dial.
Allows the velocity factor to be selected.
This is an
important factor as this
determines the electrical speed of the cable;
hence any measurements are made based
on this parameter. Units will be as
determined in preferences.
HV Trace # 62
HV Trace # 1
HV Trace #