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-810 以 83.1kHz 的頻率運行,非常適用於水和煤氣公用事業,這些公用事業通常是帶有鐘形外殼和墊圈的較大管道。 VM-810 的較高頻率也適用於定位未接地的小直徑引入線,並在無法直接連接時通過土壤感應信號到服務上。
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 | 2.95 lbs (1.34kg) |
Dimension | 14.6in(L) x 4.5in(W) x 3.3in(H) (370mm x 115mm x 85 mm) |
Power Options | Standard battery pack - using 6 x alkaline “D” cells |
Battery Life | At 70ºF (21ºC) - continuous use Output Power Alkaline 1 watt > 60 hours |
Environmental | IP54 and NEMA 4 |
External Connectors | 3-pin XLR connection socket |
Temperature Range | Operating : -4ºF to 122ºF (-20ºC to 50ºC) Storage : -40ºF to 140ºF (-40ºC to 60ºC) |
Compliance and Approvals |
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Standard Accessories (Supplied With Transmitter) |
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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-810 operates at 83.1kHz which is ideal for water and gas utilities which generally are larger pipes with bell housings and gaskets. The VM-810’s higher frequency is also good for locating ungrounded small diameter drop wires and inducing signals through the soil, onto services when direct connecting is not an option.
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 | 2.95 lbs (1.34kg) |
Dimension | 14.6in(L) x 4.5in(W) x 3.3in(H) (370mm x 115mm x 85 mm) |
Power Options | Standard battery pack - using 6 x alkaline “D” cells |
Battery Life | At 70ºF (21ºC) - continuous use Output Power Alkaline 1 watt > 60 hours |
Environmental | IP54 and NEMA 4 |
External Connectors | 3-pin XLR connection socket |
Temperature Range | Operating : -4ºF to 122ºF (-20ºC to 50ºC) Storage : -40ºF to 140ºF (-40ºC to 60ºC) |
Compliance and Approvals |
|
Standard Accessories (Supplied With Transmitter) |
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