7 END TO END SYNCHRONOUS MEASUREMENT
The purpose of that measurement is fault location when due to high and
intermittent disturbing voltages neither the active nor the passive bridge
can provide satisfactory result.
In that case KMK 8 provides the improved version of Graaf method using
the disturbing voltages itself for the measurement. (No other measuring
voltage is added).
At that measuring mode two instruments are connected to the ends of the
tested pair in MASTER-SLAVE arrangement. The two instruments
perform current measurement at the same time
and communicate over
the tested pair. The Master calculates the location of fault out of the rate
of currents. That means:
• The higher is the disturbing voltage the easier to locate a fault!
• That method can be used only in the presence of disturbing
voltages between the A and B wires
KMK 8 can be programmed as MASTER and SLAVE as well.
Mode selection is in the PASSIVE BRIDGE MEASUREMENTS menu.
For SLAVE function a simplified version of the KMK 8 (KMK 80S) is
available as optional accessory.
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