Instructions For Bridge - Megger BTDR1500 Guia Del Usuario

6.7 TDR SPECIFICATION
Except where otherwise stated, this specification applies at an ambient temperature of 20°C.
General Ranges: 10m, 30m, 100m, 300m, 1000m, 3000m and Auto (30ft, 100ft,
300ft, 1000ft, 3000ft, 10000ft)
Accuracy: ±1% of range ± pixel at 0.67VF
[Note- The measurement accuracy is for the indicated cursor position only and is conditional
on the velocity factor being correct.]
Resolution: 1% of range
Output pulse: 5 volts peak to peak into open circuit. Pulse widths determined
by range
Range 10m 30m
Pulse width 8ns 30ns
Gain: Set for each range with four user selectable steps.
Velocity Factor: Variable from 0.30 to 0.99 in steps of 0.01
Output impedance:100 Ω
An internal circuit can simulate a line with impedance in the range 0 Ω
TX Null:
to120 Ω to enable the displayed transmitted pulse to be nullified.
Update Rate: Once a second for 5 minutes after last key-press.
100m 300m 1000m 3000m
100ns 300ns 1000ns 3000ns
7.0 INSTRUCTIONS FOR BRIDGE USE
When the bridge is selected from the Main Menu, the Bridge Menu is displayed as follows:
Figure 6 - The Bridge Menu
BRIDG E M ENU
AUTO I NSULATI ON LOOP
Pr ess M ENU t o sel ec t
Pr ess t o p r oce ed
The Bridge Menu has four options: AUTO / INSULATION / LOOP / EXIT. Use the Menu key
(#4, table 1) to highlight the required selection and then the Up / Down Gain key (#7, table 1)
to proceed with the selection. The right facing triangle next to "select" indicates that another
menu option (the EXIT option) is off-screen to the right and requires pressing right when
LOOP is highlighted. At this point, INSULATION / LOOP / EXIT will be the visible menus with
a left facing triangle next to "Press MENU" indicating that another menu is now available to
the left.
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