GPI NP-732 Series Instructions For Use Manual

Automatic Level

NP-732

INSTRUCTIONS FOR USE

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Contents

Before use…………………………………………………2

1.Nomenclature.………………………………………………3

2.Operation…………………………………...……………….4

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

3-3 Checking of i angle…………………………………….….....10

4.Parameter and technical index……………………………12

5.Standard configuration………………...………………….12

NP-732 SERIES

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Before use

1 Operation

1) 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.

3) Before using, please check thecompensator.

2 Maintenance

1) Use a neutral cleaning or water to clean the horizontal circlescale

window and the instrument, never use an organic solvent.

2) Use optical lens tissue to clean the objective and the eyepiece

carefully.

3) Do not take down or assemble it yourself that is not mentioned in this

manual.

4) After use, store it in a container to prevent dust, and put it in a dry

and clean place.

5) In order to keep the high precision of the instrument, appraise the

instrument regularly one or two times a year.

NP-732 SERIES

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1. Nomenclature

NP-732 SERIES

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2.Operation

2-1 Preparing before surveying

(1) 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.

(2) Make sure that the tripod head is approximately level. Stamp the

tripod-feet firmly into the ground.

(3) Set the automatic level onto the tripod head and tighten the

center-screw.

(4) If using a spherical-head tripod, loosen the center screw and hold the

base plate, then let the level to slide on the spherical-head tripod and
get the bubble in the center (See fig.1).

(5) Fasten the center-screw.
(6) Adjust the three leveling screws to get the bubble in the center (See

fig.2).

Fig.1

NP-732 SERIES