VON MODEL SST15-832 ARC REFLECTION SECTIONALIZING SYSTEM Page 7
test lead position. This setting is changed via the options menu.
VELOCITY
pushbutton - Allows the operator to use the arrow pushbuttons to adjust the
velocity factor. Adjust velocity factor as needed to match the faulted cable. When the unit
is initially turned on, the radar is automatically set to the default VF of 53% (Correct for most
primary cable)
TRACE
pushbutton- Allows the operator to use the arrow pushbuttons to move the bottom
waveform up and down.
CONTRAST
knob- This control adjusts the LCD background intensity and allows the
operator to optimize the contrast of the display for the particular viewing conditions such as
direct sun or shade.
The backlight is always on.
LCD DISPLAY
- All information is displayed on this screen. The number in the bottom left
corner is the distance between the two markers. The number in the bottom center is the
velocity factor. The number in the bottom right corner is the current range. When a single
trace is shown (active radar mode), it is “active” and shows what the unit is currently
connected to. When two traces are shown (arc reflection mode), the bottom trace is an
active trace and the top trace is the “captured” trace from the arc.
The
FUSE
is next to the on off switch. This 12V control fuse is rated 10 amps slow blow
and disconnects the internal battery from the control circuit and motors. The fuses are
intended to limit and damage due to a component failure or short to the case. Remove the
fuses and unplug the unit when taking the unit out of it’s case for maintenance.
VI-A BASIC OPERATION
Practice in a test situation with the radar before field use is very important. Be sure that you
know how to locate the end of the units test lead with the radar before connecting to a
faulted cable. Sample traces in various situations are provided in later sections.
1.
Remove all the green ground cable and uncoil it. Route the cable without loops to the
system neutral and tightly fasten its clamp to the ground grid where the faulted cable
neutral is connected. Connect the output lead of the system to the faulted cable or
loop. The output lead can be terminated with a hot line clamp, vise grip, or feed
through adapter since MC connectors are provided. Be sure the ground return clamp
(normally painted green) fastened to the shield of the coaxial HV output cable is
connected to the neutral of the faulted cable as close to the cable end as possible.
This connection should be closer to the faulted cable than the green safety ground.
Connect the center conductor of the HV output lead (normally marked with red) to the
center conductor of the faulted cable.
2.
The unit can be operated from its internal battery, an external battery, or 120-240 volts
AC. To operate from an external battery plug in the battery leads to the DC power
input connector and then connect to an external battery. To operate from 120-240
volts AC connect to a 120-240 volt source.
Содержание SST15-832
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