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Topcon Positioning Support Hub  is a dedicated place for Land Surveyors United  members who use Topcon Instruments in the field to share experiences and support one another with troubleshooting issues. This group is specifically for discussions and tutorials related to Topcon Land Surveying Equipment.

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If you want to advance your knowledge or are interested getting deeper in to new topics you have been aware of from a distance, Topcon’s e-learning platform has been made free of charge while we all face challenging times.  Make use of the extra flexibility in your work schedule to check out educational opportunities from myTopcon eLearning without the need for travel. For a limited time all of Topcon’s eLearning courses are being offered free of charge. Just use the coupon code: CABINFEVER at…

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1 Reply · Reply by J Keith Maxwell Apr 2

Lcd for topcon

Good day again to all,Are lcd can be repaired? I have a second thought of buying used instrument. I plan to buy a used topcon instrument model cs-20r but lcd is not clear. Can it be repaired? Thank you all. 

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Topcon Hiper Sr GPS receiver RTK network

Hi Topcon users, I'm looking for a solution for my (Radio Link) problem with the Topcon Hiper SR receiver.I'm trying to get a fixed solution after connecting the Hiper with bluetooth to the FC-5000 (Magnet Field 5.1)  and getting the mouth point and Server connection.after connecting to the server  the system don't get a Radio link.We are using an internet connection (Sim card in the FC-5000) to connect to a reference antenna connected in a RTK network. We have two old receiver (Topcon Hiper…

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1 Reply · Reply by Jon Thordarson Jul 18, 2019

Topcon GTS-235W to TSC3 Serial Connection

I am having a heck of a time getting this gun to zero from my TSC3.  The gun seems to connect as soon as I run "Station Setup" from the collector, but when I tell it to backsight it beeps but does not zero and the collector says instrument error.The baud rate is set to 1200, parity is even, stop bits 2.  I tried going up to 4800 on the baud, but I'm really grabbing at straws.  If anyone has any know how it is greatly appreciated.Thanks,Dan

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  • GPT3005 sorry

  • I am using a GRT3005 regarding below desperate plea.

  • Hi all,

    I have a serious problem. Shooting forsights and baksights for my fellow theodlight user on gridlines, I set a nail on that same gridline. When I attempted to interline on that nail, I discovered my foresight and backsite were way off. I was resecting all over the site shooting gridlines using verified verified 5 different backsite. All residuals were within 3 mm. How is this possible? Previously my points, prism and prismless were within two mm of two different top end Leica's, two different professional surveyors. It's a new top me total station running an old version of SurveyPro. Please please help me solve this.

  • *thumbs up*

  • i use only  topcon instruments  such as total station, auto level.

    Easy station,GTS 105,102,235 and e.t.c.AGT G3,G4.


  • I use Topcon Green Lable GTS 105N with Topcon link,

    Ineed a software which enables direct contouring from raw data

  • @Charles:
    Slant Height: yellow arrow
  • hi...i'm using the GPT3005w and GTS-226 total station. just want to ask, what normally caused the H-angle error? both of my total station display the same error on the screen. thanks...
  • GeoEducator
  • Hi Charles,

    Please see diagram below.  you measure to the bottom of the unit but you need to make sure that you have it as SLANT on the logger if you are using Topsurv.  Hope this helps.



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