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 INITIAL PROOF!!!!  
NOT CHECKED FOR ACCURACY!!!! 
 
> How to set the voltage span potentiometers with the "No Speed = No load" 
firmware upgrade. 
> 
> Upper span pot: P2 
> Controls "power off" voltage on the MDST-6 board, usually the left side board 
and the board "without heat sinks". 
> With everything connected as normal the physically upper span pot is adjusted 
so that no voltage is going to the brake when the roller not turning. 
> 
> To check it, there should be a volt meter connected to the connector that the 
brake unit is attached to. 
> The center connector of the blue box has a red, black and green lead. 
> Connect the meter to the red and black leads and have the meter set to DC 
volts. 
> 
> The computer's EC997 software DAQ dialog box should be open and the slider 
control should be set to zero. 
> 
> DC voltage is adjusted on the MDST-6 board so that when slider control is at 
zero, there is no voltage being applied to the EC brake. 
> Turn pot clockwise till you read voltage, then counterclockwise till you just 
reach 0 vdc. 
> 
........................................................................................................................................ 
> 
> Lower span pot: P1 (controls maximum brake voltage applied to EC brake, 
maximum = 60 vdc during testing) 
> 
> First remove power to the blue or grey PAU box for safety. 
> 
> Disconnect the red and blue leads on the right side KBMM circuit board. HIGH 
VOLTAGE!! 
> 
> You are testing the MDST-6 circuit board's MAX output to the right KBMM 
circuit board. 
> 
> EC997 software: DAQ dialog box open, load slider all the way to left, at zero. 
> Attach the volt meter to the, now disconnected, red (P2) and blue (P1) leads 
from the left MDST-6 circuit board. 
> DC Voltage. 
> Secure voltmeter leads safely to the two leads. 
> Reattach power to the blue box. 
> 
> The MDST-6 will output to the leads .8 vdc 
> 
> Usually, it reads about 0.8 volts. The KBMM board, when in-circuit will drop 
the voltage ~.8 volts and that's how you get 0 vdc to the EC brake at rest. 
> 
> Start a bike and put it in top gear and let it idle, spinning the drum. This 
accommodates the new "No Speed = No Load" feature. 
> 
> The EC brake cannot come on with the leads not connected to the right KBMM 
circuit board, and you can manually change the control voltage from the MDST-6 
board when you are manually controlling the brake through the software's brake 
slider in the DAQ dialog box. 
> 
> Move the slider in the DAQ dialog box to it highest setting. 
> Turn the lower MDST-6 P-1 pot so the reading on the meter is 6.7 vdc. 
> Move the slider back to zero. 
> The meter should read 0.8 volts. 
> 
> Turn the bike off. 
> 
> Remove power to the blue box for safety. 
> 
> Reattach the red and blue leads to the KBMM board. 
> Reattach power to the blue box. 
> Perform a dyno test with the meter connected to the brake connector. 
> We are going to watch no load and full load voltage. 
> 
> The voltage should never go higher than 50 vdc even with a large 140 True HP 
bike and should read zero when the roller is stopped. 
> 
> Call or write me for help. 
> Let me know if it went well. 
> ................................................................. 
> 
> The KBMM board changes the computer's low amperage 0-5 vdc "brake control 
signal into a high amperage 0-60 vdc signal to make the EC brake to work 
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