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Table of Contents
Related Manuals for GPI NP-732 Series
Summary of Contents for GPI NP-732 Series
- Page 1 INSTRUCTIONS FOR USE Automatic Level NP-732...
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Page 2: Table Of Contents
NP-732 SERIES Contents Before use ………………………………………………… 1.Nomenclature.……………………………………………… 2.Operation…………………………………...………………. 2-1 Preparing before surveying……………………….……….….4 2-2 Surveying method………….…………...………...……..…….5 2-2-1 Measuring altitude difference……………………………..….5 2-2-2 Measuring horizontal angle…………………………………..7 2-2-3 Measuring distance using the stadia lines…………..……….7 3.Regular checking/ adjusting ………………………..……..……9 3-1 Checking and adjusting of the circular level……………..…9 3-2 Checking of the compensator………………………………...10... -
Page 3: Before Use
NP-732 SERIES Before use 1 Operation The NP-732 series automatic level is a precision instrument. Handle it carefully according to the engineering measurement regulations, and keep it away from heavy shocks and vibration. 2) Never place the instrument directly on the ground to avoid damage to the base surface or thread. -
Page 4: Nomenclature
NP-732 SERIES 1. Nomenclature - 3 -... -
Page 5: Operation
2.Operation NP-732 SERIES 2-1 Preparing before surveying Spread the tripod-legs so that the leg-tips form a regular triangle. Extend the legs until the tripod head is roughly at 10cm lower than your eye level and then fasten the extension clamp screws. -
Page 6: Surveying Method
2.Operation NP-732 SERIES Fig.2 (7) Adjust the eyepiece until the image of the reticle is clear. (8) Aim the objective at the staff through the sight gage of the instrument. (9) Turn the focusing knob to get the staff image very clear. Shift your... - Page 7 2.Operation NP-732 SERIES Fig.3 (2) Set up the staff vertically at point A, and take the reading a (backsight). (3) Set up the staff vertically at point B, and take the reading b (foresight). (4) The altitude difference h from B to A is h=a-b.
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Page 8: Measuring Horizontal Angle
NP-732 SERIES 2.Operation Calculation of altitude difference as follow: Altitude difference=Sum of backsight-Sum of foresight Altitude of the surveying point=Altitude of known point+Altitude difference 2-2-2Measuring horizontal angle The horizontal-circle-scale is graduated in minimum value of 1°and numbered every 10°. (1)Use the plumb-bob to set the center of the instrument right above the surveying point. - Page 9 2.Operation NP-732 SERIES centimeters on the staff between two stadia lines, then transform it into number of meter by multiplying 100, and the number of meter is the distance between the center of instrument and the staff. (See fig6) Fig.6...
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Page 10: Regular Checking/ Adjusting
3.Regular checking /adjusting NP-732 SERIES 3-1 Checking and adjusting of the circular level (1)Adjust the leveling screws to center the bubble in the circular level. (2)Turn the instrument 360°. If the bubble is still in the center, it means that the circular level is workable. -
Page 11: Checking Of The Compensator
3.Regular checking/adjusting NP-732 SERIES and the precision of the compensator are stable. This checking must be done before surveying. 3-3 Checking of i Angle (1)Set up the instrument at a point halfway between points A and B, the distance between staff A and staff B is about 50mm. Take reading a1 and b1. - Page 12 3.Regular checking/adjusting NP-732 SERIES Fig.8 Fig.9 Fig.10 Fig.11 - 11 -...
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Page 13: Parameter And Technical Index
4.Parameter and technical index NP-732 SERIES NP-732 Series(A model, B model)automatic level technical parameter Parts Model NP-732 Magnification Image Erect image Objective aperture ≥42mm Min focusing distance 0.3m Stadia multiplication Telescope constant Stadia additive constant Resolution ≤4″ Pattern of stadia reticle Working range ±15′... - Page 14 Giant Precision Instrument Co., Ltd.