簡介
VM-850
- 簡單 – 單鍵操作
- 直觀 – 距離敏感左/右引導TM
- Efficient – “實時”全自動增益
- 準確 - 深度和電流讀數
- 緊湊 – 輕巧堅固的設計
- 可充電鋰離子電池 – VM-850 發射器中的鋰離子電池
在定位埋地公用設施時，使用正確的頻率會使世界大不相同。 為了正確選擇頻率，都需要考慮公用設施的深度、大小、材料和擁塞量（與其他公用設施的距離）。 使用絕緣子和橡膠墊圈的大直徑、帶有鐘形外殼端的直埋管道，例如水或氣體需要更高的頻率，而直徑較小、接地良好的直埋或長距離管道工作，頻率較低時效果更好。
VM-850 以 9.82kHz 的低得多的頻率運行，非常適合較小直徑的公用事業，例如 CATV、電力和電話，對相鄰服務的影響較小。
距離感應左/右引導TM
此功能使定位器能夠找到接收最強信號的天線，從而指示應該移動到埋線上方的哪個方向。
|
Item |
Parameter |
| Construction | High impact thermoplastic (ABS) injection molded housing |
| Weight | 4.1lbs (1.86kg) |
| Dimensions | 14.6in(L) x 4.5in(W) x 3.3in(H) (370mm x 115mm x 85 mm) |
| Power Options | Internal rechargeable Lithium-ion battery |
| Battery Life | Lithium-ion – typically 40 hours intermittent use at 70ºF (21ºC) (with full backlight turned on). Re-charging cycles approx. 500 times the life cycle. Battery life varies with temperature. |
| Environmental | IP54 and NEMA 4 |
| External Connectors |
|
| Temperature Range | Operating : -4ºF to 122ºF (-20ºC to 50ºC) Storage : -40ºF to 140ºF (-40ºC to 60ºC) |
| Compliance/Approvals |
|
| Standard Accessories (Supplied With Transmitter) |
|
Using the correct frequency makes a world of difference when locating buried utilities. The depth of the utility, size, material, and amount of congestion (proximity of other utilities) all need to be taken into consideration for the correct frequency selection. Large diameter, direct buried pipes with bell housing ends that use insulators and rubber gaskets, such as water or gas require a higher frequency while smaller diameter, well-grounded direct buried or long distance in conduits work, better with a lower frequency.
The VM-850 operates at a much lower frequency of 9.82kHz which is ideal for smaller diameter utilities such as CATV, power and telephone with less bleeding onto adjacent services.
Distance Sensitive Left/Right GuidanceTM
This feature enables the locator to find which antenna is receiving the strongest signal and therefore indicate which direction one should move to be over the buried line.
|
Item |
Parameter |
| Construction | High impact thermoplastic (ABS) injection molded housing |
| Weight | 4.1lbs (1.86kg) |
| Dimensions | 14.6in(L) x 4.5in(W) x 3.3in(H) (370mm x 115mm x 85 mm) |
| Power Options | Internal rechargeable Lithium-ion battery |
| Battery Life | Lithium-ion – typically 40 hours intermittent use at 70ºF (21ºC) (with full backlight turned on). Re-charging cycles approx. 500 times the life cycle. Battery life varies with temperature. |
| Environmental | IP54 and NEMA 4 |
| External Connectors |
|
| Temperature Range | Operating : -4ºF to 122ºF (-20ºC to 50ºC) Storage : -40ºF to 140ºF (-40ºC to 60ºC) |
| Compliance/Approvals |
|
| Standard Accessories (Supplied With Transmitter) |
|