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Ứng dụng: dùng để đo độ cao dây cáp điện cao thế, viễn thông
Dải đo:
10 to 50 ft / 3 to 15 m with minimum Cable Size 1.00 in. (24.4 mm)
10 to 50 ft / 3 to 15 m with minimum Cable Size 0.50 in (12.7 mm)
10 to 39 ft / 3 to 12 m with minimum Cable Size 0.25 in (6.5 mm)
10 to 32 ft / 3 to 10 m with minimum Cable Size 0.125 in (3.2 mm)
Độ phân dải: 1/4 in. (5 mm) if < 10 m, 1/2 in. (10 mm) if > 10 m
Cấp chính xác: Typically less than 0.5% error ±2 digits
Nguồn cung cấp: pin 9 V
Nhiệt độ hoạt động: 14º F đến 104º F (-10º C đến 40º C
Tuổi thọ pin: > 50,000 phép đo
Kích thước: 3 H x 4 W x 8.5 D in. (70 H x 100 W x 205 D mm)
Trọng lượng: 1.1 lb (.5 kg)
The CHM Series of Cable Height Meters utilize ultrasonic techniques 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 (C/N 659600) and CHM600E (C/N 659600E) are designed primarily for power cable applications, while the CHM2000 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.
A temperature sensor, mounted at the front of the instruments, senses 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 which was selected.
Specifications
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(Minimum Cable Size)
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Model
(Cat. No.) |
1.00 in.
24.4 mm |
0.50 in.
12.7 mm |
0.25 in.
6.5 mm |
0.125 in.
3.2 mm |
|
CHM600
(659600) |
10 to 50 ft.
3 to 15 m |
10 to 50 ft.
3 to 15 m |
10 to 39 ft.
3 to 12 m |
10 to 32 ft.
3 to 10 m |
|
CHM600E
(659600E) |
10 to 75 ft
3 to 23 m |
10 to 50 ft
3 to 15 m |
———
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———
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CHM2000
|
7 to 35 ft
2 to 10.7 m |
7 to 35 ft
2 to 10.7 m |
7 to 35 ft
2 to 10.7 m |
7 to 32 ft
2 to 9.7 m |
| Measurement ranges are on the assumption that the air temperature is approximately 68º F (20º C). At lower temperatures, the range increases and conversely, at higher temperatures, the range decreases. | ||||
| Resolution | 1/4 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. |
| Storage | Store in dry area. Do not expose to extreme temperature. Use only leak proof batteries. |
| Battery Life | > 50,000 Measurements |
| Dimensions | 3 H x 4 W x 8.5 D in. (70 H x 100 W x 205 D mm) |
| Weight | 1.1 lb (.5 kg) |
Features:
