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Performance of Measurements
6.3 Trouble-Shooting
The UNITEST Echometer 3000 enables to locate
faults in cables or conductors.
The user must check that the circuits are not
live !
" Switch on the UNITEST Echometer 3000 press-
ing the key.
" Change to the reference range pressing the
key, e.g. Reference level I. REF I is in-
dicated on the display.
" Connect the red test lead to the red socket and
the black test lead to the black socket of the m
range.
" Connect the faulty leads of the conductor to be
measured using the alligator clamps.
" Set the measurement unit (m/ft) pressing the
key. ''m'' or ''ft'' is displayed.
" Set the measurement range selection dial in ac-
cordance with the conductor types in Tables I or
II. The key is used to change to the
measurement ranges of Table II. ''TAB II'' is in-
dicated on the display.
If the message ''- - -'' is displayed, the UNITEST
Echometer is ready to perform measurements.
" Start the measurement pressing the key.
A single signal sound is audible and the mea-
surement value of the conductor length in the
pre-selected unit (m/ft) up to the error location
is displayed. If the message "COMP is dis-
played, the leads have a short-circuit.
Short-circuited cable ends cause an increasing
measurement error of the UNITEST Echometer
3000.
6.4 Performance of Resistance Measurements
The UNITEST Echometer 3000 can easily and pre-
cisely determine electrical resistances.
The user must check that the circuits are not
live !
" Switch on the UNITEST Echometer 3000 press-
ing the key.
" Set the measurement range selection to the po-
sition "Ohm”.
" The message ''>1999,9 Ohm'' is displayed.
" Connect the red test lead to the red socket and
the black test lead to the black socket of the Ohm
range.
" Connect both ends of the resistance to be mea-
sured using the alligator clamps.
The resistance measured is indicated on the display.
If the resistance is below approx. 10 Ohm an
acoustic signal is audible.
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