Digatron DT- 31K LT User manual

Digatron DT- 31K LT Instructions
Congratulations on your purchase of a brand new Digatron data acquisition system! We would like to hear from you
regarding this instrument. Please call, mail, fax or email us with comments, questions, suggestions or improvements.
Digatron LLC
120 N. Wall St Ste 300
Spokane, WA 99201
1-866-DIGATRON
[phone] Fax
[email protected]
www.digatronusa.com
Welcome to Digatron
This manual covers the operation of your DT-31K LT instrument. Both racers and recreational riders can use this instrument. Racers
may be interested in recording lap times with the optional infrared beacon transmitter and receiver or with the manual store switch.
This book provides the information you need to quickly set up and use your instrument. It is a great reference guide.
If you are interested in learning more about how Digatron instruments can help you analyze your engine functions and driving
techniques, please visit our website, www.digatronusa.com, or phone [phone].
Table of Contents
Welcome to Digatron..........................................................................................1
Instrument Functions..........................................................................................2
Battery Installation .............................................................................................3
How Time is Displayed......................................................................................3
Setting Limits and Warning Lights.....................................................................3
Setting the Engine Limits and Delay Time ........................................................3
About Delay Time..............................................................................................3
Tach Calibration Number...................................................................................4
Setting the LED Warning Lights .......................................................................4
Recording ...........................................................................................................4
Moisture ............................................................................................................5
Erratic Readings .................................................................................................5
Button Functions ............................................................................................ 5-6
Designators Defined...........................................................................................6
Repairs and Warranty.........................................................................................7

Instrument Functions
Start Vehicle. Instrument turns on automatically. If you are using the
optional infrared beacon transmitter and receiver, the instrument starts
recording lap times automaticallywhen a transmitter signal is received.
A. Power/Record
B. Overall Maximums
Press &
hold to view
maximums
and best lap
time.
1. 2.
Press & release
to cycle through
up to three sets
ofdata.
3. Repeatsteps
1 & 2 as
desired.
MODE
MAX
MODE
MAX
4.
EXIT
REVIEW Return to monitor / record mode.
C. Lap Times & Maximumsper Lap (optional)
1. EXIT
REVIEW Shows lap time for the first lap of the last Event. (Button
press is ignored ifinstrument is receiving a tach signal.)
2. OR Changes lap backward or forward one.
Displays flashwhen best lap is shown.
Displays E#, when changing to a different
Event. Hold to jump between Events.
LIGHT SET UP
3. Changes the functions being displayed.
Maximums for the current lap are displayed.
MODE
MAX
D. Reset (clear memory)
1.
AND
Press and release at same time.
2.
Press when displayflashes. Canceled if notpressed
within10seconds.
SET UP
EXIT
REVIEW SET UP
E. Power Off
Theinstrumentwill turn offautomaticallyifit does notreceive
anybutton presses or a tach signal.
1.
Turns instrument off, if it’s not recording
or receiving a tach signal.
OR
MODE
MAX
LIGHT
AND

Battery Installation
Two AAA batteries power the DT-30K. These allow the instrument to run for 40 hours with the backlight on and 150 hours with the
backlight off. The instrument will display lob , signaling that the batteries are low, several hours before the functions becomes
inaccurate.
To replace the batteries, remove the screw from the battery door on the back of the instrument. Replace the two batteries, observing
battery polarity.
If your instrument is stored for a long period of time, remove the batteries.
How Time is Displayed
Time is displayed as a 20 second timer. After 19.99 seconds the displayed time wraps back to zero. To see total time, up to 19:59
minutes, press and hold the Time button.
Setting Limits and Warning Lights
Limits and warning lights warn you of conditions that could be harmful to your vehicle’s engine. They should be set at levels that
allow you to react to the visual warnings before engine damage occurs.
Setting the Engine Limits and Delay Time
Press to return to monitor/recordmode.
From monitor/record, instrument enters Set Up mode.
Delaytime will be the first limit,see next page for
explanation.
1.
2.
3.
O
R
Press either button to change the
number being displayed. Hold the
button to change the number faster.
Press to setnext limit.Repeat steps 2 &3 until all
limits and calibration numbers areset.
SET UP
SET UP LIGHT
MODE
MAX
4.
EXIT
REVIEW
Function limits are set in the following order: Delay Time, Temp1 (C1), Temp2 (C2), Tach (RPM) and Tach calibration number.
Also, if you are not using a function on your instrument, use a shorting plug and set that function’s limit to any number greater than
200.
About Delay Time (Optional, for Racing)
Some sanctioning bodies do not allow racers to use infrared beacon transmitters and receivers. If this is true for you, set your
delay time to .1 seconds seconds.
The delay time allows your instrument to ignore extra beacon signals at the track. Delay time is the time, in tenths of a second, that
your instrument ignores beacon signals after receiving a signal. The delay time must be less than your best possible time between
beacons, or the instrument will miss your beacon signal. Delay time is set in Set Up mode.
For example, if it takes you approximately 14 seconds to complete a run, set your delay number for 12 seconds. After your instrument
receives its first beacon signal, it will ignore all signals for 12 seconds.
*Note: If you are not a racer, set your delay time to .1 seconds.

Tach Calibration Number
The Tach limit requires two separate parameters. The first is the maximum revolutions per minute (RPM) for safe engine operation.
The second number, the Tach calibration, allows the instrument to display the correct RPM for your engine. The instrument divides
the Tach input signal by the Tach calibration number. This number can be .5 to 31.
The most frequently used numbers are:
1 - for single cylinder 2 cycle and most 4 cycle motors
2 - for 2 cylinder 2 cycle and 4 cylinder 4 cycle motors
If you are unsure of the Tach calibration number for your engine, experiment. For example, if your calibration number is currently set
at 2 and the RPM displayed is double what it should be, set the number to 4.
Recording Laps and Maximums
The instrument records in sessions called Events (shown by an E), which start each time the instrument begins recording. Within
Events, time segments (Laps, Lon the display) are created with infrared beacon receivers and transmitters or with a store switch. To
end an Event your engine must be turned off, the Exit button must be pressed, or the Tach must go below 200 RPM (this value can be
changed on your PC).
Setting the LED Warning Lights
Multiple warning lights can be set to the same function, but only one function can be set to a light.
From monitor/record, instrument enters Set Up
menu.SEL will flashon thedisplay.
1.
O
R
With SLL flashing, press either
button to enter Set LED Warning
Lights.
3.
MAX
E
N
G
I
N
E
POWER
EXIT
7. Press once to return to Set Up menu.
Press again to return to monitor/ record
mode.
5. O
R
Press either button to change the
number being displayed. Hold the
button to change the number
faster.
O
R
Press either button to set next
light.Repeat steps 4 - 6 until all
lights are set.
6.
MAX
E
N
G
I
N
E
2.
PAUSE
PLAY
Press and SLL will flash on the display.
4.
PAUSE
PLAY
Press to change the function the light will
correspond to.
EVENT
T
I
M
E
EVENT
T
I
M
E
LIGHT
SET UP
SET UP

Moisture
Your instrument is designed to be water resistant. We recommend keeping it as dry as possible. Please cover or remove your
instrument before washing your vehicle. Digatron offers tach bags to help keep the instrument dry. If moisture does get inside the
instrument, remove the endcap without switches and let the instrument air out in a dry environment. A hairdryer, on low power, can
accelerate drying.
Erratic Readings
If the instrument encounters excessive electrical interference it will display ERR on the left side of the top display. The stored data
might be invalid, and may need to be erased.
To erase your stored data, see Reset.
The ERR enunciator can also indicate an incorrect instrument or sensor installation. If your instrument is doing strange things, put it
in Set Limits and check to see that the limits and calibration number(s) are still where you set them (see page 5).
Installing a resistance plug boot can normally solve electrical interference problems.We recommend using an NGK boot, #
LB05EMH.
To avoid erratic readings:
♦Keep your temperature and Tach leads separated by at least 3".
♦Route the leads as far away from the coil as possible.
♦Install the Tach lead on the plug wire at least 2"back from the plug boot. If you still have a problem, try a
different location on the plug wire.
♦Replacing one or all of your sensors often solves this problem.
Please contact Digatron if your problem continues.
Button Functions
Lap (top, side button): (2) functions
A. Displays lap time and number.
B. Press and hold to show best lap time.
Engine (bottom, side button) (2) functions
A. Cycles between up to three sets of data.
B. Press and hold to show maximums and designators.
Power / Exit (2) functions
A. Turns the instrument on and off.
B. Exits Set Up and Playback modes.
←/ Light (2) functions
A. Press and hold to dim warning lights, and turn backlight on and off.
B. Decreases values in Set Up and Playback.
→/ Set Up (2) functions
A. Enter Set Up.
B. Increases values in Set Up and Playback.

Play / Pause (2) functions
A. Press for lap times, lap maximums and playback.
B. Pauses and resumes playback.
Reset Instrument Erases recorded data and for troubleshooting.
A. Press Play / Pause and →at the same time.
B. Then press Play / Pause within 10 seconds.
Designator Definitions
The following is a list of designators that can appear in the main part of your display:
select this to set your engine limits
select this to set your warning lights
displayed if the Review button is pressed and there are no laps.
displayed if a warning light is set to not come on
displayed when setting the Tach or MPH calibration number
displayed if your batteries are low
during a reset of memory, press the Set Up button to proceed with reset
displayed if a reset of memory was successful
displayed if a reset of memory is not successful
last lap time
current lap time
best lap time
lap distance
total hours
odometer
displayed when the instrument is communicating with your PC
, Channel 1, Channel 2, which are temp1 and temp2 respectively
when shown on the top of a display, the function is over ranging. when shown on the bottom of a display, the function is
under ranging
The following is a list of enunciators that can appear on the side of your displays. These show what function is in the display:
RPM1 tach
CHT cylinder head temperature
EGT exhaust gas temp.

Repairs and Warranty Information
If you have any questions about the operation of your instrument, please call. One of our technicians will be happy to help you. Please
have your instrument nearby to help while troubleshooting with the technician.
Your instrument is warranted to be free from factory defects and electronic failure for two years from the date of purchase. Physical
damage during normal usage is not covered under 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 of purchase
date.
When returning an instrument for repair, please use the repair form found on our website or enclose a note indicating your return
address, phone number and a detailed description of the problem. Send your instrument and sensors so that we can check the
complete system.
Send repairs to:
Digatron LLC
120 N. Wall St. Ste 300
Spokane, WA 99201
www.digatronusa.com
Phone: [phone] Fax: [phone]/2008