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5
Automatic Optical Level
633665
1
Lens
2
Peep Sight
3
Eyepiece Cover
4
Eyepiece
5
Horizontal Calibrator
6
Horizontal Calibrator Reference Point
7
Vial
8
Vial Adjustment Screws
9
Vial Viewing Prism
10
Focus Dial
11
Horizontal Movement Dial
12
Foot Screw
Product Familiarisation
Accessories
1 x Plumb Bob, 1 x Hex Key, 2 x Adjustment Tools
Intended Use
This level is intended for measuring outdoor heights, distances and angles
optically in conjunction with level staffs.
Before Use
This is a precision instrument. Please read these instructions carefully and
follow guidance on correct handling and storage so that you get the best
out of your level and prolong its working life.
• Protect the instrument from excessive movement or knocks. Always
transport the instrument in the case provided
• For optimum performance of your level, thoroughly check the instrument
before use
• Due to the precision nature of this instrument, even if it has been packed
correctly in its case it may need re-adjustment (See ‘Horizontality of the
line-of-sight’, below)
• Allow a short time before use for the instrument to adapt to the prevailing
temperature
Setting up
• Always handle the instrument with care when setting up
• Set the tripod (not included) at a comfortable height and so that the top of
the tripod is as level as possible. When working on soft ground, tread the
legs of the tripod firmly into the ground
• Attach the Level securely using the tripod fixing screw
• Centre the circular bubble in the vial by rotating the foot screws (Fig 6)
Checking and adjusting the vial
Checking the vial
• Use the Foot Screws (12) to centre the bubble in the vial (see Fig. 3)
• Turn the instrument 180°. The bubble should remain centred
• If the bubble moves out of centre, the vial needs adjustment
Adjusting the vial
• Use the foot screws to bring the bubble halfway to the centre
(Fig. 9, below)
Fig.9
• Then, using the hex key supplied, turn the Vial Adjustment Screws (8) to
centre the bubble (see Fig. 4)
• Repeat the above procedure until the bubble remains centred when the
instrument is turned 180° °
Operation
Fig.6
Pointing and focusing
• Point the Level towards a bright background or hold a white sheet of
paper in front of the lens
• Rotate the Eyepiece (4) until the cross hairs are sharp and black
• Turn the level towards the measuring staff (not included); you can use
the peep sight
• Looking through the eyepiece, rotate the Focus Dial (10) until the image
of the staff is sharp and clear
• Rotate the Horizontal Movement Dial (11) to set the vertical hair down the
centre of the staff
Height measurement
• Read the staff where it is intersected by the middle hair. With metric
staffs it is usual to estimate to 1mm. The height reading in fig.7 is
3.456m
Fig.7
Distance measurement
• Read the staff where it is intersected by the upper and lower stadia hairs.
The difference multiplied by 100 is the distance from the instrument to
the staff
• For example, in fig.7 these readings are at 3.601m and 3.309m,
therefore, the distance from the instrument to the staff is:
(3.601m - 3.309m) x 100 = 29.2mAngle measurement
Angle measurement
• Align the vertical hair with Point A - see Fig 8
Fig.8
• Note the reading on the Horizontal Calibrator (5) at the Horizontal
Calibrator Reference Point (6). Let this reading be 'x'
• Use the Horizontal Movement Dial (11) to turn the instrument and align
the vertical hair with Point B and note the reading on the horizontal
calibrator. Let this reading be 'z'
• The angle y = x − z
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