Operating Instructions
5) Adjust Vp until the CT100 distance measurement to the active cursor equals the physical
measurement. The final Vp value is the true Vp value of the cable.
Temperature correction
The CT100 may take control of the trace from time to time in order to adjust to changes in
internal temperatures. A notice will appear on the screen during the adjustment, which may
take several seconds.
The device also adjusts for temperature at startup and when changing the cable length
settings. At these times, the correction takes somewhat longer than during normal operation.
The readout for temperature on the device screen also shows the last temperature at which
the device performed a correction. This readout will turn red when the difference between the
current temperature and the temperature of last adjustment is too great.
Cable test procedures
Cable test procedures
Distance to fault
1) Attach the cable to the BNC connector.
2) Set Vp to match the Vp of the attached cable.
34
Mohr CT100 / CT100HF Operator's Manual
Figure 5: Screenshot after the HORIZONTAL SCALE knob has
been used to zoom in on the cable end for greater accuracy in
determining Vp.
