Megger CHM Series Cable Height Meters
Product Description
The CHM Series of Cable Height Meters utilize ultrasonic sound to determine the height of up to six overhead cables and wires. The instruments are designed to address specific measuring requirements on cables up to 75 feet (23 m). The CHM600 (50 Feet) and CHM600E (75 Feet) are designed primarily for power cable applications, while the CHM2000 (35 Feet) is designed for telecommunication applications.
The Cable Height Meters emit 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 instruments. The result can be displayed in either feet and inches or meters. However, before the final measurement can be displayed, the air temperature must be measured because the speed of sound varies at approximately 0.2 percent per degree Celsius.
Overview
Features
- Dramatically reduces measuring time
- Inherently safe
- Designed for ease-of-use
- Hand-held portability
- Calibration and maintenance free operation
- No physical connection to cables or wires
- Measures the height of up to six overhead cables
- Available in alternate configurations
- Measurements up to 75 ft.
Applications
- Telephone lines
- Distribution lines
- Transmission lines
- Cable television (installers and contractors)
- Street lights
- Sag (lowest point to ground)
- Separation between up to six cables
Specifications
Resolution | in. (5 mm) if < 10 m, 1/2 in. (10 mm) if > 10 m |
Accuracy | Typically less than 0.5% error ±2 digits |
Power source | 9 volt alkaline leak-proof battery (included) |
Operating Temperature | 14º F to 104º F (-10º C to 40º C) with compensation over the full range |
Battery Life | > 50,000 Measurements |
What's in the Box
- Cable height meter
- 9 V Battery
- Instructions