English
21
Performance of Measurements / Performance of Cable Lengths Measurements
+
Store REF
The ''Store REF'' key is used to save the previously
set reference cable length.
The ''Store REF'' is only activated when the "Shift”
key is pressed at the same time.
[Arrow up]
The [arrow up] key together with the [arrow down]
key are used to set the reference cable lengths with-
in the reference range.
Store
The ''Store'' key is used to save a measurement re-
sult. If several measurement values have been cu-
mulated within the cumulative data memory, the
sum can be imported into the data memory by
pressing the ''Store'' key.
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Clear one
''Clear one'' is pressed to clear the last measure-
ment value saved. The cumulative data memory is
not affected. The ''Clear one '' key is only activated
when the "Shift” key is pressed at the same time.
6.0 Performance of Measurements
6.1 Performance of Cable Lengths
Measurements
•
The leads to be measured must be positioned next
to each other. It is not possible to measure indi-
vidual wires.
•
For coaxial cable measurements, connect the in-
ternal conductors to the read sockets and the
sheath to the black socket.
•
Only connect one lead per measurement connec-
tion.
•
Additional measurement errors up to 10 % read-
ing may occur due to the differing cable structure
and material, depending on the manufacturer.
"
Switch on the UNITEST Echometer pressing the
key.
"
Connect the red test lead to the red socket and
the black test lead to the black socket of the m
range.
"
Connect two parallel leads of the cable to be
measured using the alligator clamps.
"
To set the desired measurement unit (m/ft),
press the
und
key. ''m'' or
''ft'' is displayed.
"
Set the measurement range selection dial in ac-
cordance with the conductor types in Table I or
II. The
key is used to switch to the mea-
surement ranges of table II. "TAB II” appears on
the display.
If the message ''- - -'' is displayed, the UNITEST
Echometer is ready to perform measurements.
"
Start measurement using the
key.
A single signal sound is audible and the mea-
surement value of the conductor length in the
pre-selected unit (m/ft) is displayed.
It is preferable to carry out the measurement
with open cable ends. If the cable end has a
short-circuit the message COMP is displayed.
Short-circuited cable ends cause an increasing
measurement error of the UNITEST Echometer
3000.
Start/Off
m/ft
m/ft
Shift
Start/Off
Shift
Shift
m
Ω
m
Echometer
6
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