Craftmans Laser Measuring Tool Model 48252 gives a "Err" message when trying to read a distance

They are advertised as 50 foot range, but the accuracy starts falling off past about 35 feet

PAYa try telling helpers what PC this is.
googing hints at A CARPENTERS tool , laser distance.
right?
well its not a computer.

http://manuals.ryobitools.com/system/files/6428/original/EMTP0006_347_eng.pdf?2017

Hello. The button labled "FT/M" is what you need to press (it should be the top left button). I included the link to the manual in case it could help.

Hope this answer helps out, if it does please rate this a four-thumbs up. Thank you.

http://www.hammerwall.com/Download_Manual/44246/

Unnfortunately the 48252 is only a distance/volume measuring tool. Unless you have a different model number?

1) There is a big difference between Bosch promo manual and Bosch operation manual:

2) Online promo manual says: Combined Indirect/Pythagoras for measuring total height from a distance
http://www.boschtools.com/AboutBoschTools/RequestProductLiterature/Documents/2010%20Catalog%20PDF/2010%20Measuring%20Tools.pdf

3) Online operation manual shows no instructions for Pythagoras measuring.
And shows no button for displaying E value or height.
http://www.engineersupply.com/images/bosch-tools/Bosch_Digital_Distance_Measurer_130k_User_Manual.pdf

4) Operation manual shows:
Length Measurement** and tells you to measure the height while promo says tool will calculate height E
Area Measurement*** shows rectangle only and not triangle
Volume Measurement
Area or Volume
Rounding of Large Calculations
Continuous Measurement (Tracking)

5) I would contact Bosch directly:
http://boschtools.com/Service/ContactUs/Pages/default.aspx

6) Until you get satisfaction from Bosch, the Bosch device gives precise menasurements that can be entered into a Pythagorean calculator online, which defeats the purpose of a jobsite tool: But you can access online calculator via cell phone while on jobsite.
http://www.analyzemath.com/Geometry_calculators/pythagorean.html

Hello, found the manual you were looking for.
Hope this answer helps out, if it does please rate this a four-thumbs up. Thank you.

http://www.hammerwall.com/Download_Manual/44246/

DIRECT THE LASER FROM POINT A <---------TO'------------>POINT B
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Here is a website of a company that repairs :
www.prontotech.com

Use a second measuring tool and compare the results, or you can measure a known size or length (floor tiles for example)and check the reading you get.