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Digatron’s DT-40K Instruction Manual

Introduction

Congratulations on the purchase of your 
new DT-40K. The DT-40K is Digatron’s 
small, easy to use, multi-function, digital 
engine monitoring system. This instrument 
was designed for the customer who wants 
to know how their engine is functioning 
without spending a lot of time and money. 
Depending on which version of this 
instrument you purchased, 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, along with lap times. 

Lap times can be stored manually or with a beacon (both optional). All of this 
information can then be played back on the DT-40K. 

Included with your instrument is a simple instruction sheet that allows you to 
quickly install and use your Digatron DT-40K. The instructions in this booklet 
are more detailed to help you learn all of the capabilities of your new instrument.

1

Содержание DT-40K

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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