SubSite 750/752 TKR location is considered to be mostly used for DitchWitch drilling rigs which very often work with 86B, 86BH, 86BG transmitters and their modifications. Among disadvantages they have is the relatively low power capacity of 86B transmitter, the irregular «appetite» of 86BH transmitter and completely impossible current consumption of the highly-accurate 86BG transmitter. Moreover, due to the electronic unit construction peculiarities, all these transmitters have a feature of «spontaneous behavior» in different drilling heads — temporal loss of signal.
We have had an attempt, and I think it was a success, to combine all the best properties of series 86 transmitters in one transmitter for SubSite 750/752 and eliminate their faults.
86BGH — combines best properties of series 86 transmitters
Below you will find the table to compare the parameters of series 86 transmitters.
|Operating depth without interference||15.24 m||21.3 m||15.24 m||22 m|
|Pitch accuracy measurement||±1%||±1%||±0.1% — at pitch up to 45%, and 1% — at pitch from 45% tо 100%||±0.1% — at pitch up to 45%, and 1% — at pitch from 45% tо 100%|
|Current consumption in open space||<75 mA||<170 mA||22-25 mA|
|Off-line operation time, alkaline cells: Energizer, Duracell of standard size C|
|Off-line operation time, lithium battery of TWIN type|
Optional but a very important feature of the new product is a combination of 86BG highly-accurate properties in one transmitter required to build drain and sewage lines. All in one!
The unique product has been created. At pitch positioning accuracy equal to ±0,1% — absorbed current is only 25 мА in the open space. Operation time with lithium batteries of TWIN type is 175 hours or 70 hours with alkaline cells (in the drilling head).
Compare operation time of original transmitters with alkaline cells:
At ultralow absorbed consumption operation distance increased to 22 meters — our transmitter is equivalent to the borehole transmitter 86BH.
Specification of transmitters gives the maximum depth of data receipt (pitch, roll) in perfect conditions without active interference. The factual operating depth is undersized. For HDD location, for SubSite 750/752, you may follow these rules:
While creating the new transmitter the cause of temporal loss of signal, which mostly series 86 transmitters have, was eliminated. The signal was lost due to antenna’s failure — mechanical damage of the ferrite core. The ferrite core is fragile and breakable on impact or severe vibration. Due to the failure of antenna there appeared the temporal loss of the signal as it was impossible to maintain the set level of power. We have transformed antenna’s control system and now, at antenna’s failure, the power level remains the same. The absorbed current slightly increases — with the common battery the transmitter will operate 50-60 hours, not 80 hours. But you may not notice this at all ;-)
We managed to develop the new 86BGH transmitter due to many years of repair experience of SubSite transmitters. For example, in 2011 we manufactured on order the transmitter for SubSite 750 with the operating distance of 27-28 meters to drill under the river. It is very often that we receive transmitters which lose signal due to the broken antenna for repair. We have elaborated the new method to power-supply the antenna, even if it is broken, the transmitter keeps on operating at the same level of power.
As a result, series 86 transmitters were modernized into series 86BGH transmitters. The operating depth is 22 meters, pitch accuracy — 0,1 % and operation time —175 hours.
86BGH transmitter is available for our customers.