Meridian 810 User Manual

L6-20N Level and LT6-900N Level-Transit106070809080706020201010101020203030404050506060708090807060504030201050503034044505505010203040506070809080706

Reading the circle and vernierThe 360° horizontal circle is divided in quadrants (0-90°). The circle is marked by degrees and numbered every 10 degree

When sighting through the telescope, keep both eyes open. You will find that this eliminates squinting and will not tire your eyes.Remember to avoid t

Using your instrumentLevels and level-transits, as do all sighting instruments, operate onthe principle that any point along a level line of sight is

Running straight lines with a levelSet up the instrument over Point A. A plumb bob should be heldover Point B. Sight approximately on the plumb bob co

Measuring and laying out anglesFor measuring angles, attach a plumb bob cord to the hook on thescrewdriver-style handle of the tripod. The point of th

To lay out an angle, proceed in the same way as in measuring anangle. Set the instrument at station 1, level it, and set the circle atzero. Swing the

Using your instrumentLevel-transitsThe following example illustrates how to use a level-transit for layingout roads, building lines, ditches, orchards

All components not described on pages 3 and 4 includingadjustment screws and nuts, have been factory set andshould not require handling or readjustmen

Checking for calibrationYour David White instrument must be serviced and repaired by an authorized David White service center. You may, however,choose

For your records Model No. • L6-20N • LT6-900NDate purchased Serial No.For owner identification, please complete and mail the attached registrat

With David Whiteyour sights are seton precision and accuracy.Congratulations! You’ve purchased a David White builder/contractorinstrument, American-ma

David WhiteP.O. Box 359, Watseka, IL 60970 USAURL:http://www.davidwhite.comW44-8830-810 TJOP (0305)REV.1Limited Lifetime WarrantyDavid White ("Se

Specifications Meridian L6-20N LevelMeridian LT6-900N Level-TransitOptimum sighting range: Recommended job range up to 200 feet.Accuracy range:Recomme

General DescriptionMeridian L6-20N LevelMeridian LT6-900N Level-Transit1020304050607080908070605050404030302020101020203030404050506060708090807060504

The telescope provides a sharp image magnified 22 times. This means theobject sighted appears 22 times closer than it would with the naked eye.The tel

Setting up your instrumentEach of the following steps isimportant in preparing to use yourinstrument.1. These instruments must be used with a 5/8 x 11

2. Before setting up your instrument, loosen the clamps. If usingthe level-transit, be sure the telescope lock lever is in the closedposition. Attach

4. LEVELING THE THREE SCREW INSTRUMENTInstruments utilizing three leveling screws are mounted on the tri-pod and leveled in the following manner:Mount

BUBBLE ADJUSTMENTSIf the telescope bubble does not remain centered after having lev-eled the instrument, and reversed the telescope end for end (180°)