Beyond user manuals, Hilger & Watts also published dedicated technical documentation for repairs and adjustments. These are especially useful if you need to get a non-working instrument back into shape. Examples you might search for include an "Instruction Manual, Aberdeen Works of Hilger & Watts Ltd." from around 1970, which contained a set of electrical and mechanical manuals used in the company's own drawing offices.
Online archives often host PDF scans of the ST110 and ST150 series.
Always store the instrument in its original carrying case, with the clamps tightened gently. Handling: Never force a screw or clamp. 6. Sourcing a Hilger & Watts Manual
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