Look through the reading microscope and locate the desired scale (H or V).
In the pantheon of precision surveying instruments, few names carry the weight of . For much of the 20th century, if you were mapping a new motorway, surveying a North Sea oil platform, or triangulating a national border, you were likely looking through an eyepiece made by this legendary Anglo-Germanic firm. Today, the search query "Hilger Watts theodolite manual" is a common lament from two distinct groups: frustrated modern surveyors trying to restore a classic instrument and auction hunters who have just purchased a beautiful brass-and-steel artifact without instructions.
Depending on the model year, the instrument will feature either a optical plummet built into the alidade/tribrach or require a traditional mechanical plumb bob.
Estimate the remaining single minutes and seconds by looking at where the index line rests between the 20-second graduation marks. Reading the Microptic No. 2 Micrometer
Let’s assume you have obtained a for your Microptic T2. Here is a typical calibration workflow drawn directly from the manual’s text: hilger watts theodolite manual
Firmly press the tripod shoes into the ground to prevent settling. Step 2: Mounting the Instrument
Built into either the alidade or the tribrach base, used to center the instrument precisely over a ground station mark.
Instruction manual for use with Pilot Balloon Theodolite Mk V
Proper setup is crucial for accuracy. Following the procedures ensures a stable instrument. Look through the reading microscope and locate the
Check your instrument’s serial number plate (usually on the base of the alidade). Then, begin your search for the matching Hilger Watts theodolite manual using the resources in Part 4. And if you find one, treat it as the rare artifact it has become.
Before operating a Hilger & Watts theodolite, it is crucial to understand its primary mechanical and optical assemblies.
Direct reading to 1 minute of arc, estimation to 15 or 30 seconds.
Employs a coincidence reading system that averages opposite sides of the glass circle to eliminate eccentricity errors. Today, the search query "Hilger Watts theodolite manual"
Many engineering and geomatics departments at universities (such as University College London or Newcastle University) maintained archives of copies because they taught with these instruments in the 1960s and 70s. A polite email to the librarian might yield a PDF.
Hilger & Watts Ltd was formed in 1948 through the merger of two renowned instrument makers: Adam Hilger Ltd (founded in 1874, famous for optical components) and E.R. Watts & Son (founded in 1856, famous for precise surveying circles).
Set the tripod legs firmly into the ground over the station mark. Keep the tripod head as level as possible visually.
: For work in tunnels or after dusk, the manual described a battery-powered lamp that could replace the mirror, turning the theodolite into a glowing beacon of math in the dark. 4. Battles Against Nature