Digatron DT-40K Instruction Manual Download Page 15

Fig. 3

Proper
installation of
EGT sensor

13

Route the sensor cable from the motor to the pigtail with the 

grey

 boot on the 

back of the instrument. Secure the cable with cable ties to prevent excessive 
movement. 

The thermocouple cable is brittle and will break at the flex points 

if not properly tied down. It is also good practice to protect the cable with 
fuel line. 

Beacon Receiver Placement (Optional)

The Digatron beacon receiver is used in conjunction with the Digatron transmitter. 
The beacon receiver needs to be mounted on your vehicle with an unobstructed 
view of the transmitter. Mount it with the red lens facing where the transmitter 
is located, with the longest part of the case protecting the red lens from the sun. 
Other racers will rarely interfere with the beacon signal, but mounting the receiver 
as high as practical will help to avoid that situation. 

Attach the receiver to your vehicle with cable ties or hook and loop material (such 
as Velcro). Route the sensor cable to the pigtail with the 

white

 boot on the back 

of the instrument.

Using A Beacon Transmitter (Optional)

When using Digatron SMART beacons, multiple beacons can be on the track at 
once. Each SMART beacon can transmit one of 16 different signals. Your 
instrument treats all of these signals as lap signals. When the instrument encounters 
a beacon signal, it starts recording the race or it stops recording the current lap 
and begins a new one. The instrument does allow you to ignore beacon signals 
for a set amount of time after receiving a signal.

For more information about ignoring multiple beacons see Appendix B.

Summary of Contents for DT-40K

Page 1: ...ENGINE MONITORING SYSTEMS DT 40K INSTRUCTION MANUAL...

Page 2: ...t Lap and Event Number and Clear Memory 7 Analyze Data 8 Lap Times and Maximums 8 Detailed Review of a Lap 9 Power Off 9 Appendix A Sensor Installation 10 Tach Sensor 10 CHT Sensor 12 EGT Sensor 12 Be...

Page 3: ...sed it can monitor any combination of the following functions cylinder head temperature CHT or water temperature WT exhaust gas temperature EGT and tachometer Tach It datalogs all of these inputs alon...

Page 4: ...utor or magneto Sensor cables too close to these components may pick up radiated electrical interference and cause erratic instrument readings and operation A distance of at least 6 from these compone...

Page 5: ...ts and calibration to reprogram themselves If your instrument is doing strange things put it in Set Limits and check to see that the limits and calibration are still where you set them see Appendix B...

Page 6: ...tion To change the display resolution press the and the buttons at the same time High Resolution Highest number displayed is 1 59 9 After that time the instrument continues to record and the 1 on the...

Page 7: ...iously recorded data Change Function Displayed Press the Function button to change what is being displayed It cycles through the functions in this order CHT WT EGT RPM Lap and Lap Time Not all instrum...

Page 8: ...ill register the next beacon signal it receives and then begin ignoring again When you finish a lap while the instrument is recording it will display the total time for the last lap for three seconds...

Page 9: ...en again exceeds the limit the instrument will again display and flash the over limit function Reset Lap and Event Number and Clear Memory To reset the lap and event number to zero and clear all recor...

Page 10: ...ess the or button to change the lap number being displayed If you are viewing the last lap of an Event the button moves you to the first lap of the next Event If you are at the first lap of an Event t...

Page 11: ...als Change Function Press the Function button to view the different functions readings for this lap Max Readings Press the Max Event button to review the maximum readings for each function the current...

Page 12: ...cable from the motor to your instrument securing with cable ties Plug into the pigtail with the small push on type connector Four cycle engines The Tach sensor is a small antennae that picks up the en...

Page 13: ...Fig 1a Example of standard installation Fig 1b Example of Briggs installation 11 Standard Inductive Tach Sensor Installation Low Energy Ignition Inductive Tach Sensor Installation Briggs...

Page 14: ...16 hole through the header Remove the clamp assembly from the header and redrill the hole to 13 64 Reinstall the clamp assembly and align it with the hole just drilled Insert the sensor into the fitt...

Page 15: ...ng the red lens from the sun Other racers will rarely interfere with the beacon signal but mounting the receiver as high as practical will help to avoid that situation Attach the receiver to your vehi...

Page 16: ...mbs reach of the driver This switch requires a 15 32 mounting hole for installation Mount the switch in a position that will provide easy access while driving Tie the coil cord to the steering column...

Page 17: ...set in the following order CHT WT EGT Tach and Tach calibration number and minimum lap time If you do not have all of these functions it will also set limits in this order minus the function s you ar...

Page 18: ...ally run between 1100 F and 1350 F The EGT on a properly tuned engine will increase rapidly as the throttle is opened and as the load on the engine is increased At full throttle and full load the EGT...

Page 19: ...rse direction Pg 9 2 Set Limits Button not used Monitor Record Instrument enters Lap Max and displays Lap Pg 8 Laps Instrument enters Playback and begins reviewing data for the selected lap Pg 9 Playb...

Page 20: ...Pg 8 Playback Changes the function playing back in this order CHT WT EGT Tach Lap and Lap Time Pg 9 6 Set Limits Button not used Monitor Record Displays the maximum value for each engine function sinc...

Page 21: ...getting no lap times or intermittent lap times 1 Tach Signal Make sure your Tach sensor is properly installed and picking up a strong signal If it is not spiral the colored wire down the spark plug wi...

Page 22: ...lon flashing This signifies that the clock is running either during record or playback Why is the Display Flashing This signifies that you are either in Set Limits or that your engine exceeded a set l...

Page 23: ...the warranty Be sure to fill out and return your warranty card for our records If we do not have a card on file for your instrument you will be charged for repairs unless you can provide us with proof...

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