How to calibrate bdsm 100 distance measurer type 1

1) Please use electronic spray for electronic and LUBE the small POT in the electronic Board.

2) Adjust the Speed sensor, and test it, and see is ok or faulty, clean it and ajust 1mms near of magnet. otherwise replace it.
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Put in new batteries, clean lens, and calibrate. If this does not work, type " Leica Disto A6 Laser Distance Meter user manual " into computer search engine. It will bring up sites for manual.

a scale is calibrated at half it's capacity. when you use a 50 gram weight to calibrate it, it can still measure 0-100 grams properly.

Put in new batteries and clean lens and calibrate if it has that function. If that doesn't work, Type the " Leica Disto A6 Laser Distance Meter user manual" and it will bring up sites to manual.

I just got one complete with manual and original box. It was not working, so I disassembled it and repaired the internal mechanism and recalibrated it for distance and vertical image coincidence.

Disassembly is easy (two screws at front and rear) and the "repair" for mine was to lubricate two pads that the mechanism rests on that were "sticky." I removed the mechanism, but that is not required -- just manual manipulation of the distancing arm should be sufficient to expose the lubrication points. Do not use 3-in-One or similar oil -- that thickens with time. Lacking the "proper" oil type (watch maker's), I would use a small drop of motor oil.

Calibration is simple -- use an object with a known distance that is about half the range of your unit. Adjust the "focus" knob to make the two images coincide (don't worry about vertical coincidence yet). Hold the thinner of the two distance adjuster knobs and turn the thicker one until the tape displaying the distance reads the actual distance to the known object. I would then adjust the image coincidence vertically by turning the screw on the bottom of the unit on the right (near the loop for a lanyard). It will be stiff! Turn it about a quarter of a turn and recheck vertical image coincidence -- if worse, turn it back the other direction a half-turn. Repeat with small turn increments until the images coincide vertically. Once that is done, recheck the distance calibration.

to calibrate you need to have an area 75 to 100 feet in distance. place laser on tripod 20 feet from one end, take measurements on short and long end, then move laser to center of range and take measurements on both ends . the distance between both sets of marks should be within + or - 1/4 inch if not move level screw to move beam to center then center bubble

If you take a tape measure and step from the wall at exactly 10 feet, you will be able to turn the calibration knob to the same exact distance. All other distances from that point on will be precise. Thank you, Dana

Go to; www.konus.com, they are the maker of this rangefinder, or call them in Miami,Fl. at; 1'305-592-5500, they should be able to assist you with a Owners Manual.
Good luck. :)