Cable fault pre-location Syscompact 2000 M pro
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12.5.2 Setting ICM parameters
On the IRG 2000
1. In the general pre-location parameters, set the Range parameter to between double and
quadruple the cable length.
In the first reflection period, the measurement results are distorted due to the ignition lag.
Generally, the second or third reflection period is suitable for the evaluation. The
measurement range must therefore be doubled or even quadrupled.
2. If required, set additional general pre-location parameters.
Further information: Chapter Setting the general pre-location parameters on the IRG 2000
(on page 52)
3. Press the MENU key.
4. Use the rotary knob to select the Mode menu item and press the rotary knob.
5. Use the rotary knob to select the ICM menu item and press the rotary knob.
The method is selected.
6. Press the MENU key.
7. Use the rotary knob to select the Settings menu item and press the rotary knob.
8. Use the rotary knob to select the ICM parameters and press the rotary knob.
9. Set the ICM parameters using the rotary knob.
The following table provides an overview of the pre-location parameters that you can
define.
Pre-location
parameters
Settings Function
Pulse width
20 ns – 10 µs Is used to set the pulse width
The pulse width is set automatically depending on the measuring
range. Nar
row pulses have high resolution, however, they have a
lower range due to the higher damping. They are especially
suitable for shorter cables. When using wide pulses, the range
increases and the resolution decreases.
Voltage
10 – 60 V Is used to set the pulse voltage
Impedance
10 – 250 Ohm Is used to set the output impedance
On the system control panel
1. Press the MENU key on the display.
2. Select the SURGE MODE menu item and press the DEF. key.
The MAX.OUTPUT VOLTAGE view is displayed.
3. Use the arrow keys to set the maximum permissible output voltage and press the ENTER
key.
The DEF. PULSE view is displayed.
4. Use the arrow keys to set the desired surge sequence (1 – 20 pulses/min) and press the
ENTER key.
The OUTPUT POWER view is displayed.
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