DESCRIPTION
The SupaRule Cable Height Meter is a handheld meter for measurement of cable sag, cable height distance, and overhead clearance of conductors. It is a modern alternative to telescopic measuring poles. The SupaRule Cable Height Meter utilises ultrasonic signals to determine the height of overhead cables up to 23m (75feet). Used by line operators within the utilities industries, e.g., electricity and telecommunications, the CHM190 measures the height of a single wire, the CHM300 and CHM300E measure up to 3 wires, while the CHM600 and CHM600E models measure up to 6 wires.
HOW IT WORKS
The Cable Height Meter emits short bursts of sound which originate from the cone-shaped transmitter. The microprocessor in the instruments calculates the elapsed time for the bursts of sound to be reflected from the cable back to the instrument. The result can be displayed in either feet and inches (imperial), or meters (metric) format. To account for the fact that speed of sound varies with temperature, a temperature sensor, mounted at the front of the instruments, senses the actual air temperature, and automatically compensates.
OPERATION
The Cable Height Meter is capable of measuring up to six cables (provided they are within range). This is accomplished by standing directly beneath the cable and aligning longitudinally (looking down the line). Simply press the "ON" button to power up the instrument, and allow the temperature to stabilize. Press the ‘MEASURE’ button and, if necessary, gently "rock and tilt" the instrument until a stable reading is obtained.
