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Please refer to the TintMan Operating Instructions for more detailed  

information about using and configuring this instrument.

www.turnkey.tel

© 2009, Turnkey Instruments Ltd. Issue 6, December 2009.

Turnkey

 

Instruments Ltd

g-meter+

Quick Reference Guide

BRAKE TESTING

When carrying out a statutory MOT test, the brake test procedure detailed in the latest 
version of the relevant MOT Inspection Manual must be followed. For your convenience, 
this is reproduced in the g-meter+ instruction booklet.

Position the g-meter+ in a convenient location in the vehicle with the direction 

of travel arrow pointing roughly in the forward direction. The instrument must be 

placed as parallel as possible to the road surface, and located so that it cannot 

move under hard braking.  

The instrument is self-aligning, providing its direction of travel arrow roughly 

coincides with the actual direction of travel (within say ±60 degrees) no significant 

error will be introduced.
Press and release the button to select Test 1, 2, or 3, then press and hold the button 

to arm for a new test. The previous results for this number will be over-written only if 

the new test is completed. When oo appears on the display release the button; after 

a sort pause, the instrument will determine its tilt within the vehicle and complete 

its arming. The display indicates go when it is ready to proceed. Do not move-off 

or disturb the instrument until go is displayed. To cancel the test, press the button 

again and the previous results will be retained.
The vehicle can now be accelerated to speed and the brake test carried out. The 

g-meter+ will automatically sense the beginning and end of the deceleration and 

afterwards retain the results in its memory. During acceleration the display will 

indicate Ac, and when stopping it indicates St.

SWITCHING OFF
The g-meter+ will automatically switch itself off if the button is not pressed for more 

than 4 minutes. It will not switch off while it is armed ready for a brake test. Double-

Double-Click the button to switch-off manually, but disconnect the printer first.

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