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©2009 Johnson Level & Tool

7. Care and Handling

Care must be taken to maintain the accuracy of the instrument.

After each use, the instrument should be wiped clean and kept in
its carrying case.

• Remove dust from the lenses with a soft brush or a nonabrasive

wipe. Never tough the lenses with your fingers.

• Store the instrument in a dust-free area with low humidity.

8. Product Warranty

Johnson Level & Tool offers a one year limited warranty on each its
products. You can obtain a copy of the limited warranty for a
Johnson Level & Tool product by contacting Johnson Level & Tool's
Customer Service Department as provided below or by visiting us
online at www.johnsonlevel.com. The limited warranty for each 
product contains various limitations and exclusions.

Do not return this product to the store/retailer or place of purchase.
Required repair/calibration must be done by an authorized 
AccuLine Pro® service center or Johnson Level & Tool's limited 
warranty, if applicable, will be void and there will be NO WARRANTY.
Contact our Customer Service Department to obtain a Return Material
Authorization (RMA) number for return to an authorized service center.
Proof of purchase is required.

2595H  7/29/09  10:15 AM  Page 14

Summary of Contents for 40-6910

Page 1: ...Model No 40 6910 Instruction Manual Congratulations on your choice of this 22X Builder s Transit Level We suggest you read this instruction manual thoroughly before using the instrument Save this ins...

Page 2: ...d Shell Carrying Case 1 2 Features and Functions Horizontal Circle Graduated to single degrees and reads by vernier direct to 15 minutes Vertical Arc Reads to degrees 45 0 45 Horizontal Tangent Screw...

Page 3: ...sing knob Leveling Vial Vertical tangent knob Eyepiece Horizontal graduated circle Horizontal vernier Telescope objective lens Leveling screw Vertical arc Lock Lever Vertical lock knob Horizontal tang...

Page 4: ...of the tripod to a comfortable viewing height and secure the retractable legs Attach the instrument to the tripod head with the center screw and tighten securely as shown in figure below Leveling Moun...

Page 5: ...g Rotate the instrument by hand to aim the telescope to the far object Rotate the focusing knob until the object can be observed clearly Rotate the horizontal tangent knob to place the vertical cross...

Page 6: ...orizontal vernier Note however that the vernier is below the circle portion rather than inside as in the case of the horizontal One other minor difference is that you will read angles up or down rathe...

Page 7: ...e readings on the two level rods The difference should be the same A A should equal B B The difference between A A and B B is the instrument error at 200 feet Fig 1 Fig 2 With an adjusting screw A fac...

Page 8: ...re rubber cover to its original position 5 4 Setting Points in Line with use of transit level Points A and B are two points which are on a line Center and level your instrument over point A sight on p...

Page 9: ...ight of the line of sight horizontal crosshair above or below each of the points is found by reading the rod A line of sight 69 inches above A and 40 inches above B is shown above Therefore B is highe...

Page 10: ...ween points A and D To make the finding of this difference simple use the convenient terms plus sight and minus sight and carry the readings at each set up as shown The difference of elevation between...

Page 11: ...not and adjust the plumb bob until it is clear of the ground point By shifting the entire instrument set the tripod keeping tripod head as level as possible by estimation so that the plumb bob appears...

Page 12: ...the telescope toward point G until the vertical crosshair is exactly on point G Your instrument is furnished with a vernier and you will be able to read the angle closer than a single degree The use o...

Page 13: ...mum focus 4 1 2m Clear objective aperture 22mm Field of view 2 100 ft 0 6m 30m Number of lenses 5 Level vial 4 per 2mm Horizontal circle Graduation diameter 110mm Graduations 1 Number Each 10 0 90 0 V...

Page 14: ...y for a Johnson Level Tool product by contacting Johnson Level Tool s Customer Service Department as provided below or by visiting us online at www johnsonlevel com The limited warranty for each produ...

Page 15: ...tment at 800 346 6682 9 Product Registration Enclosed with this instruction manual you will find a warranty card to be completed for product warranty registration Product warranty registration can als...

Page 16: ...ill void any applicable limited warranty and there will be NO WARRANTY If you need any assistance in locating any accessories please contact our Customer Service Department In the U S contact Johnson...

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