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The Johnson 40-6250 digital machine level is the simplest, most 

accurate way to level equipment such as mills, presses, lathes, 

compressors, granite plates and other items in your factory or jobsite. 

Proper leveling ensures the longevity of your equipment, reduces 

vibrations, helps ensure proper alignment and helps control the 

accuracy of your equipment’s outputs.

This digital machine level features:

 

•  Extreme accuracy to 0.01°
•  Wireless remote communication  

for ease of use

•  +/- 10° operating range
•  Backlit remote control screen
•  32’ operating range

40-6250 Digital Machine Level Quick Start Guide

www.johnsonlevel.com/manuals

POWERING THE DEVICE

1.  The remote control requires 3xAAA batteries to operate. Remove 

the battery door on the remote to install/replace these batteries. 

2.  The sensor can operate from either 3xAAA batteries or from 

For best results, calibrate prior to each use.
1.  Put the sensor on a flat surface within ±3° of level.
2.  Power on the sensor and remote. Press and hold 

 for 5 seconds 

(until you hear 5 quick beeps) to enter calibration mode.

3.  The screen will flash and “1” will illuminate on the LCD. Press 

 to 

store the first calibration point. The sensor will beep 3 times, and 

“2” will illuminate to indicate the calibration point is stored. 

4.  Rotate the sensor 180° as shown below, then press 

 to store the 

second calibration point. Three beeps indicate point #2 is stored.  

The sensor will power off to indicate calibration is successful.

LCD & REMOTE OVERVIEW

LOCATING THE SENSOR

The sensor can be placed on any flat surface that you need to 

level. Installation can be temporary or permanent. For temporary 

placement, you can simply lay the sensor on top of the surface you 

wish to level, or you can secure it along the flanged bottom edge 

using clamps. For permanent installation, you can also mount it using 

screws through the four included mounting holes. 

CALIBRATION

LEVEL INDICATORS (X & Y)

BLUETOOTH / CALIBRATION CHANNEL

STATUS (Battery, Volume, Backlight, Lock)

MEASURE REFERENCE

DISPLAY UNIT

CURRENT MEASUREMENT

CAL POSITION #1

POWER -

 Press/hold to power on/off

MEASURE - 

Press to start measuring angle

RESOLUTION -

 Press to set resolution, hold to select degree mode

FUNCTION - 

Press to set unit, hold to select channel

ABS/REL -

 Set absolute or relative angle, set alarm points

LOCK & SOUND -

 Press to lock the keypad, hold to toggle sound

AXES & LIGHT -

 Press to set axes, hold to toggle backlight

CAL POSITION #2

the included 5V adapter. To install 

batteries, remove the battery access 

screw on the underside of the sensor 

and install the batteries according to 

the polarity indicated. 

3.  To use the 5V adapter, press it firmly 

into the sensor’s DC power port. Only 

use the included power adapter.

We want to get you up and running as quickly as possible - but this quick start guide is not a replacement for reading and understanding your  

operator’s manual! For complete safety & operating instructions, refer to the operator’s manual included with your tool, or scan the QR code.

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