Megger SMART THUMP ST16, Руководство пользователя

Страница: 48 / 62

M
AVTMST16 Rev 1 May 2016
38
Customized TDR Features
The following table lists and describes all TDR features included in the system:
Menu item Description
Adjust Gain
Adjusts the gain setting. By doing so, the amplification of the received signal
and, thus, the amplitude of the Y-axis can be adjusted.
With an adjustment of the gain setting, the fault trace, if present, is erased and
a new “live” trace is immediately recorded.
NOTE: The unit adjusts the gain automatically; however the
operator can set his own gain. Too much or too little gain
makes the interpretation of the trace impossible!
Change visible
range
Changes the displayed range. By doing so, the trace can be zoomed in and
out.
Change value of
Cable Velocity
Allows manual adjustment of the velocity of propagation. While changing the
velocity, the distance values (X-axis scaling) are immediately refreshed and
adapted.
This menu option is only effective, if the Rate parameter is set to Meter or
Feet . See page 18.
You may either manually adjust the value or automatically adopt the value by
identifying /selecting a cable from the cable list.
See page 19.
Set / Move Cursor
Changes the cursor position. By doing so, the distance value for any point on
the trace (typically to the fault) can be obtained.
You can also use the cursor to scroll along the X-axis in zoomed view.
At first, a coarse adjustment is made and confirmed by pressing the rotary
knob once - subsequently, the position can be fine-tuned.
Adjust the End
Marker
Allows the manual adjustment of the blue end marker.
At first, a coarse adjustment is made and confirmed by pressing the rotary
knob once - subsequently, the position can be fine-tuned.