Product Description Significantly reduces measurement time Inherently safe Designed for ease of use Portability Operation without calibration and maintenance No physical connection to cables or wires Measures height of up to six air cables The CHM series cable height meters use ultrasound to determine the height of up to six air cables and wires. These devices are designed to meet specific requirements for measuring cables up to 23 meters (75 feet) in length. The CHM600 (C/N 659600) and CHM600E (C/N 659600E) are primarily intended for power cables, while the CHM2000 is designed for telecommunications applications.
These cable height meters emit short acoustic pulses from a conical transmitter. The microprocessor in the devices calculates the time elapsed for the sound waves to reflect from the cable back to the device. The result can be displayed in feet and inches or meters. However, before the final measurement can be displayed, the air temperature must be measured, as the speed of sound varies by approximately 0.2% per degree Celsius.
A temperature sensor on the front panel measures the actual air temperature. This information is sent to the microprocessor and incorporated into the algorithm. The distance is then displayed in meters or feet and inches, depending on the selected parameter.
