Diatron DT-51S User manual

Table of Contents
Welcome to Digatron..........................................................................................1
Instrument Functions.................................................................................... 2 - 3
Batteries Not Needed..........................................................................................4
Setting Limits and Warning Lights.....................................................................4
Setting the Engine Limits and Delay Time ........................................................4
About Delay Time..............................................................................................4
Tach Calibration Number (RPM1) .....................................................................5
Jackshaft Calibration Number (RPM2) ..............................................................5
Setting the LED Warning Lights .......................................................................5
PC Software: Set Up & Analysis........................................................................5
Recording ...........................................................................................................6
Moisture ............................................................................................................6
Erratic Readings .................................................................................................6
Button Functions ................................................................................................7
Designators Defined...........................................................................................8
Repairs and Warranty.........................................................................................8
Welcome to Digatron
This manual covers the operation of your DT-51S instrument.
Both racers and recreational riders can use this instrument. Racers may be interested in recording in time segments, either laps or
sections of the strip or course. Recreational drivers will usually be interested in recording without laps.
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 your Digatron instrument can help you analyze your engine functions and driving
techniques, please visit our website, www.digatronusa.com, or phone [phone].
Note: These instructions cover current versions. If you have an older version, and
find the instructions don’t exactly match, please contact Digatron at
[email protected] or toll free at 866.344.2876.

Start Vehicle. Instrumentturns on andstarts recording automatically
when a tachsignal is received. Records for 2 hours, then records over
oldestdata.
A. Power/Record
B. Overall Maximums
Press
and
hold.
C. Best Lap Time
D. Lap Times (Time Segments)
1.
Instrument Functions
1. Displays lap
time. DT-54:
shows best
lap time.
EVENT
T
I
M
E
Returns to
engine data.
MAX
E
N
G
I
N
E
MAX
E
N
G
I
N
E
1. PAUSE
PLAY Shows lap time for the last recorded lap.Laps are created
with a beacon transmitter and receiver or manualstore
switch.
4.
POWER
EXIT Return to monitor / record mode.
2.
MAX
Press and
release to cycle
through up to
three sets of
engine data.
E
N
G
I
N
E
3. Repeat
steps 1&2
as desired.
2.
1A. DT-52 &DT-53:
Press and hold
to view best lap
time.
2. OR Changes lap backward or forward one.
Displays flashwhen your best lap is
shown.
3. DT-52 &DT-53:
Press and hold to view best lap time.
EVENT
T
I
M
E
EVENT
T
I
M
E
LIGHT SET UP

F. Playback
E. Maximumsby Lap
4. POW ER
EXIT Return to monitor / record mode.
Selecta lap. See D.Lap Times.
1.
3.
OR
Changes lap backward or forward one.
Displays flash when your best lap is
shown.
LIGHT
SET UP
Displays engine data,
showingmaximum
values for this lap.
2.
MAX
E
N
G
I
N
E
2A.
Displays lap data.
Press and hold to
view Event
number.
EVENT
T
I
M
E
2.
Press to view engine data.
Select a lap. See D.above.
1.
3.
PAUSE
PLAY
Begins playbackof selected lap. Pause and
resume playback with each press.
Ifpaused, steps through data in 0.1second increments.
Ifnot paused, press and hold to fast forward.
4.
SE
MAX
E
N
G
I
N
E
T UP
POW ER
EXIT
7.
Press once to return to D. Maximums byLap. Press
again to return to monitor/record mode.
Ifpaused, reversesteps through data in 0.1 second
increments. If not paused,press and hold to reverse.
LIGHT
5.
Press and release to
cycles through up to
three sets of engine
data.
6.
MAX
E
N
G
I
N
E
6A.
Displays lap data.
EVENT
T
I
M
E
G. Reset (clear memory)
1.
PAUSE
PLAY And SET UP Press at same time.
2.
PAUSE
PLAY Press when displayflashes. Aborted if not pressed
within 10seconds.
H. Power Off
The instrumentwill turn offautomaticallyifit does notreceive
anybutton presses or a tach signal.
1.
POWER
EXIT
Turns instrumentoffifit is notrecordingorreceiving
a tach signal.
OR

Batteries Not Needed
When your vehicle is running, the DT-50S series instrument gets power from the lighting coil. To use your instrument for an
extended time without power from the lighting coil, you can buy a wall adaptor to power your instrument.
When your engine is off, the instrument is powered by super caps, which are similar to rechargeable batteries. They will recharge in
ten minutes when your engine is running. When charged, the super caps will run your instrument, without backlight and warning
lights, for about 20 minutes. LC will be displayed when the super caps need to be recharged.
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.
There are two ways to set your limits and warning lights:
♦With Your Instrument (see the next pages).
♦With Your PC, download cable and configuration software (page 9).
Setting the Engine Limits and Delay Time
POWER
EXIT
5. Press once to return to Set Up menu.
Press again to return to monitor/ record mode.
From monitor/record,instrument enters SetUp menu.
SELwill flash on display.
1.
SET UP
O
R
With SEL flashing,press eitherside
button to enter Set Engine Limits.
2.
MAX
E
N
G
I
N
E
EVENT
T
I
M
E
LIGHT
3. O
R
SET UP 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 limit.
Repeat steps 3 &4 until all limits and
calibration numbers are set.
4.
EVENT
T
I
M
E
MAX
E
N
G
I
N
E
Function limits are set in the following order: Delay Time, Temp (C1), Temp(C2), Temp(C3), Water Temperature, Tach (RPM1),
Tach calibration number, JS(RPM2), and JS calibration number (minus any functions that you do not have). Also, if you are not using
any functions on your instrument, set its 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.
The delay time allows your instrument to ignore extra beacon signals at the track. Delay time is the time, in seconds, that your
instrument ignores beacon signals after receiving a signal. The delay time must be less than your best possible time between beacons
(lap), or the instrument will miss your beacon signal. Delay time is set in of Set Up mode.
For example, if it takes you approximately 16 seconds to complete a lap, set your delay number for 14 or 15 seconds. After your
instrument receives its first beacon signal, it will ignore all signals for 14 seconds
*Note. If you are not a racer, set your delay time to .1.

Tach Calibration Number (RPM1)
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 between 1 and 16.
The most frequently used numbers are:
2 cylinders - set at 2 or 4 3 cylinders - set at 3 or 6 4 cylinders - set at 4 or 8
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.
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 Upmenu.
SEL will flashonthedisplay.
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.
Repeatsteps 4 - 6 until all lights are
set.
6.
MAX
E
N
G
I
N
E
2.
PAUSE
PLAY
SLL will flash on the display.
4.
PAUSE
PLAY
Changes the function the light will correspond to.
LIGHT
EVENT
T
I
M
E
EVENT
T
I
M
E
SET UP
SET UP
PC Software: Set Up & Analysis
All limits and warning lights can be set on your PC with our configuration software. This software also allows you to change which
function is displayed in each window. You can set different beacon signals as lap and splits. Recorded information can be
downloaded to a PC. The instrument must be in Monitor/Record mode, with no Tach signal when hooked up to a computer. The
instrument does NOT need sensors hooked up. Download the software from www.digatronusa.com. Attach the download cable to
the white connector on your instrument. Attach the other end to any serial port on your PC. Then follow the computer’s instructions.

Recording
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).
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 on page 4.
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
Time (top, side button): (2) functions
A. Displays lap/segment time and number.
B. Press and hold to show best lap/segment time.
Engine (bottom, side button) (2) functions
A. Cycles between 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.
/ Set Up (2) functions
A. Enter Set Up.
B. Increases values in Set Up.
Play / Pause (2) functions
A. Press for lap/segment 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. Press Play / Pause before 10 seconds passes.

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 Play button is pressed and there is no recorded data
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 Play 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 recording and the Play button is held
displayed if the engine is on when trying to enter Playback
displayed when the instrument is communicating with your PC
, when setting limits, displayed for 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:
RPM1tach
CHT cylinder head or water temperature EGT exhaust gas temp.
MEM memory
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