Telco KE2500, Руководство по эксплуатации, Страница: 11 / 24

Operating Manual
Telco Multimeter
KE2500
KURTH ELECTRONIC www.kurthelectronic.de info@kurthelectronic.de
11
1.4 Insulation
In this setting KE2500 measures the insulation resistance
between the two wires running a pair of wires and the individual
wires and ground.
Measurement method
Connect the wires to be measured and the shield of the cable.
Select
Insulation and press SEL . The measurement starts
automatically thereafter. The results are displayed in Ohm.
With
F1 , the min / max values can be switched on or off for easy
assessment.
F2 can be selected from the individual operating resistors such
as two cores of a wire pair (A-B) and between a wire pair and
the ground (A-GND, B-GND).
Under
F3 Test V the test voltage at A-B can be changed from
100 V to 8 V. Reason: In order to be able to measure the
insulation also on lines with terminated ISDN / NTBA. For A-
GND, B-GND, a test voltage of 100 V is always present.
The polarity can be reversed with
F4 .
Safety note:
The tests of insulation resistance occur at high DC
voltages. There is the risk of electric shock when touching
conductive parts. When performing a test of the insulation
resistance always follow the safety precautions and make
sure that you follow the precautions for safety at work.
1.5 Capacitance
The purpose of the measurement is to determine the operating
capacity of a wire pair. The measurement shows whether the
line is open and shows the typical input capacitance of
connected devices as well as asymmetries of the conductor
pair.
Measuring method
Connect the wires to be measured and the shield of the cable.
The far end of the pair of wires to be measured must be open!
Select the
Capacitance mode and press SEL . The
measurement is then started automatically. The display shows
on the top the cable parameters used for this measurement.
The capacity and the resulting cable length are displayed.
With
F1 , the min / max values can be switched on or off for the
assessment of fluctuations.
Under
F2 measuring points the measuring points can be
selected.
Capacitance
1,67 nF
38,6 m
Date / Time
Probe
A - B
A - B
A - GND
B - GND
Insulation
5,116 M Ω
Date / Time
Probe
A - B
A - GND
B - GND
A - B
Test V
100 V
Polarity
Normal
100 V
8 V
Basic V/2=100us 0.6mm C 0.042nF
Normal
Invers
min/max
min/max
On
On
On
Off
On
Off
min: 5,101 M Ω
min: 0,54 nF
max: 5,120 M Ω
max: 1,78 nF