Operation; Meter; Tdr - Megger BTDR1500 Guia Del Usuario

4.0 OPERATION

When the instrument is first turned on, the screen displays the following:
Figure 3 - The Main Menu Display
M a i n M enu
Use the MENU key (see #4 table 1) to highlight the instrument
function you want and then use the Gain key (see #7 table 1) to
M ETER

TDR

BR IDG E
select that mode.
Pr es s M ENU t o sel ec t
Pr es s t o p r oce ed

5.0 METER

When this mode is selected, the instrument displays a DC Voltmeter on the display as shown
below:
Figure 4 – The Voltmeter Display
Use the MENU key (see #4 above) to automatically select the
E t o B EXIT
E t o A
displayed DC voltage, either E to A Volts or E to B Volts and to
highlight the exit option. Then use the Gain key (see #7 above) to
+ 004 V
confirm exit from the Voltmeter Mode.
Use the black, red and green leads of the four loose test leads and
Pr ess M ENU t o s el ec t
connect each to their associated socket. The DC voltage
measurement is make between the black and red terminals (E to A) or the black and green
terminals (E to B). If there is any possibility of connecting to a low-impedance source, e.g.
Mains Supply, then this must be verified to be de-energised by using a correctly rated
volt-meter, before testing with the BTDR.
This is a DC Voltmeter ONLY intended for use on a positive earth telecom system and can
measure up to ± 250 V. This voltmeter must not be connected to an energised mains supply,
the Mains Blocking Filter (see the Specification) can not be used with the meter as it will
prevent its correct operation. The minimum source impedance for a DC voltage source is
1.5 Ω.
CURSOR
6.0 TDR
Figure 5 - The TDR Display
1000 m
6.1 OPERATING INSTRUCTIONS
When the TDR mode is selected from the Main Menu, the TDR display (figure 5) is shown.
Use the TDR leads provided (the pair of leads welded together) and connect into terminals A
& B. The display shows the current trace reading from the TDR leads and the information
along the screen's perimeter is the option settings for the instrument (see later). The title of
the currently highlighted option is displayed in the top left of the screen. The User selects the
current option using the MENU button (see #4, table 1) to select from CURSOR position,
EXIT 0. 67R
100 Ω
725 m
7