REVELTRONICS UTCOMP-3 User manual

www.REVELTRONICS.com
UTCOMP-3 & UTCOMP-PRO
User & assembly manual.
Last update (v3.8.0): 2020-04-17

- 2 -
Please read this manual carefully before device using.
Contents
1. Technical data and requirements .......................................................... - 5 -
2. Assembly manual ................................................................................ - 11 -
2.1. General remarks ............................................................................................................................................................................ - 11 -
2.2. Pinout........................................................................................................................................................................................... - 12 -
2. . Pinout description .......................................................................................................................................................................... - 1 -
2.4. Wiring diagram .............................................................................................................................................................................. - 14 -
2.4.1. POWER SUPPLY ........................................................................................................................................................................ - 15 -
2.4.2. KEYBOARD .............................................................................................................................................................................. - 15 -
2.4. . BUZZER .................................................................................................................................................................................. - 16 -
2.4.4. TEMPERATURE SENSORS DS18B20 ............................................................................................................................................. - 16 -
2.4.5. FUEL CONSUMPTION SIGNAL ..................................................................................................................................................... - 17 -
2.4.6. VSS – Vehicle Speed Signal ....................................................................................................................................................... - 19 -
2.4.7. HEADLIGHTS or FAN COOLER .................................................................................................................................................... - 20 -
2.4.8. ANALOG SENSORS - Adc and AdcVcc inputs ................................................................................................................................ - 20 -
2.4.9. LPG System ............................................................................................................................................................................. - 21 -
2.5. Graphic display: LCD or OLED.......................................................................................................................................................... - 21 -
2.6. Additional instructions for assembly ................................................................................................................................................. - 22 -
3. User manual ............................................................................................. - 23 -

- -
.1. Quick start .................................................................................................................................................................................... - 2 -
.2. First start in the vehicle .................................................................................................................................................................. - 25 -
. . Calibration of speed and fuel consumption ........................................................................................................................................ - 26 -
. .1. Initial calibration ...................................................................................................................................................................... - 26 -
. .2. Accurate calibration - achieving accuracy better than 1% .............................................................................................................. - 28 -
.4. Menu navigation ............................................................................................................................................................................ - 0 -
.5. Overview of screens and related functions......................................................................................................................................... - 0 -
.5.1. Screen 1 - Temperatures ........................................................................................................................................................... - 1 -
.5.2. Screen 2 - Tacho ...................................................................................................................................................................... - 1 -
.5. . Screen – TRIP (daily counter) ................................................................................................................................................. - -
.5.4. Screen 4 – Trip-meter for off-road .............................................................................................................................................. - 4 -
.5.5. Screen 5 – Fuel tanks ............................................................................................................................................................... - 5 -
.5.6. Screen 6 – Measurement of acceleration/deceleration ................................................................................................................... - 5 -
.5.7. Screen 7 – Oscilloscope ............................................................................................................................................................. - 6 -
.5.8. Screen 8 – Clock ...................................................................................................................................................................... - 7 -
.5.9. Settings screens ....................................................................................................................................................................... - 7 -
.6. Review of other functions ................................................................................................................................................................ - 8 -
.6.1. Headlights reminder ................................................................................................................................................................. - 8 -
.6.2. Inspection / Service .................................................................................................................................................................. - 8 -
.6. . Travel costs ............................................................................................................................................................................. - 9 -
.6.4. Black ice alert .......................................................................................................................................................................... - 9 -

- 4 -
.6.5. Alerts ...................................................................................................................................................................................... - 9 -
.6.6. Trip summary .......................................................................................................................................................................... - 40 -
.6.7. Units change ............................................................................................................................................................................ - 40 -
.6.8. Battery voltage (Voltmeter) ....................................................................................................................................................... - 40 -
.6.9. User defined screens................................................................................................................................................................. - 41 -
.6.10. Adjusting brightness ............................................................................................................................................................... - 42 -
.6.11. Adjusting contrast .................................................................................................................................................................. - 42 -
.6.12. Data-Logger ........................................................................................................................................................................... - 42 -
.6.1 . Digital output control (digOutUser) ........................................................................................................................................... - 44 -
.6.14. Support for additional sensors: pressure, temperature, AFR, EGT etc. ........................................................................................... - 44 -
.7. Settings device parameters ............................................................................................................................................................. - 45 -
.7.1. Configuration parameters .......................................................................................................................................................... - 45 -
.7.2. User preferences ...................................................................................................................................................................... - 46 -
.7. . Screen settings ........................................................................................................................................................................ - 46 -
.7.4. Advanced settings .................................................................................................................................................................... - 46 -
4. UTCOMP Andr id ................................................................................. - 47 -
5. Attachments ........................................................................................ - 48 -
5.1. APPENDIX A – Analog temperature sensors (NTC) calibration .............................................................................................................. - 48 -
5.2. APPENDIX B - Troubleshooting ........................................................................................................................................................ - 49 -
5. . APPENDIX C - Frequently Asked Questions (FAQ) ............................................................................................................................... - 52 -

- 5 -
1. Technical data and requirements
Universal Trip C mputer (UTCOMP) developed and manufactured by REVELTRONICS is an on-board computer designed for wide range of
vehicles. It takes information from main sensors then process data and sends to LCD or OLED screen with user friendly interface.
Technical parameters
•power supply from 12V or 24V installation (safe range: +8… + 2V DC),
•power consumption in standby mode: 4-12mA@12V (typ. 8mA@12V),
•power consumption in idle mode: 40-500mA@12V (depends on used display, brightness, connected sensors etc.),
•operating temperature: -40C…+85C,
•LCD operating temperature: -20C...+70C (recommended +10C...+40C),
•OLED operating temperature: -40C...+85C,
•digital temperature sensors measurement range: -55C...+125C, accuracy 0,5C, resolution 0,1C,
•vehicle speed accuracy: +/- 1km/h or mph (calibration possible),
•acceleration measurement accuracy: +/- 0,1s (for VSS constant < 0.2 [m/imp]),
•fuel consumption accuracy: 1% for petrol engines, 2% for petrol + gas engines, 1- % for diesel engines (calibration possible),
•sampling time of real-time fuel consumption: average from 1s, 2s or s,
•sampling frequency from analog sensors (measurements and alerts): 50Hz,
•analog sensors measurement accuracy: +/- 0,05V for UTCOMP- and +/- 0,02V for UTCOMP-PRO [V],
•voltmeter accuracy: +/- 2% range +/- 0,05V (calibration possible),
•supported units: km, km/h, l/100km, l/h, km/l, mil, mph, mpg, Celsius, Farentheit, bar, psi, volt,
•communication with PC and Android devices via USB 2.0 (HID).

- 6 -
UTCOMP- vs. UTCOMP-PRO
Compatible displays: LCD 122x 2pix (2,5")
OLED 122x 2pix (2, ")
OLED 256x64pix ( ,2")
(+ HUD mode available)
Digital inputs:
(e.g. speed signal, fuel consumption, rpm etc.) 4 5
Digital outputs:
(e.g. relay s itch control 5V@100mA) - 1
Analog sensor inputs 0- V:
(high impedance) 2 4
Analog sensor inputs 0-30V:
(high impedance) - 1
Analog inputs with V pull-up:
(for resistance or NTC sensors) 1 2
Digital temperature sensors:
(additional inputs for DS18B20 sensors) 2 4
Total no of temperatures: 4
(2 digital + 2 analog)
6
(4 digital + 2 analog)
Data-Logger:
(data recording in internal memory) - logging up to 10 parameters

- 7 -
Display dimensions [mm]: LCD 2,5" (left) and OLED 2, " (right) for UTCOMP- *:
*NOTE: on the bottom side is soldered socket for IDC40 tape.
Display dimensions [mm]: OLED ,2" for UTCOMP-PRO**:
**NOTE: on the bottom side is soldered socket for IDC16 tape.
Check comparison video on youtube:
https://www.youtube.com/watch?v=dOOXRnN7p0c

- 8 -
Module dimensions: UTCOMP- :
Width: 90 mm
Depth: 65 mm
Height: 20 mm
Module dimensions: UTCOMP-PRO:
Width: 120 mm
Depth: 83 mm
Height: 29 mm

- 9 -
Features & Requirements:
To activate following features of the UTCOMP some signals have to be connected. What kind of signal for each function is required shows the table
below. You should connect only what are you interested with. You do not have to connect all signals.
Gr up
Example features
Requirements
N f wires
I
•
date and time
•battery voltage (voltmeter) + alerts
•travel time
•service & inspection with reminder (x2 for motohours + x2 for
date)
•customizable user screen(s)
•splash screen (text or bitmap)
power supply
II
•
temperatures (inside, outside, oil, engine, user
-
1, user
-
2)
•alerts for temperatures (customizable, e.g. black ice alert,
engine/oil temperature warnings etc.)
temperature sensor
(analog NTC or digital DS18B20)
- for each digital sensor
1 - for each analog sensor
III
•
vehicle speed (
real
-
time
velocity, average, maximum)
•distance travelled
•mileage
•acceleration (and deceleration) measurement with user defined
ranges
•trip meter for off-road (normal/reverse/freeze modes)
•service & inspections with reminder (x4 for milage)
•speed limit alert
vehicle speed signal (VSS)
(ref. to section 2.4.6) 1
IV
•
current fuel
consumption for PB/ON
•average fuel consumption for PB/ON
•travel cost
•trip summary
fuel consumption signal
(ref. to section 2.4.5)
+ req. from group III
1 (2)
V
•
full
support for
vehicles
with LPG system
signal from LPG electrovalve or injector
1

- 10 -
•
independent measurements of distance & fuel
consumption for PB
and LPG (with auto-recognition of current fuel supply)
(
ref. to section
2.4.9
)
+ req. of groups III & IV
VI
•
fuel level in fuel tank(s)
•estimated distance to refuel
•low fuel level alert (configurable)
req. of groups III, IV, (V) (differential
measurement) or fuel level signal
(measurement from sensor)
0 (1)
VII •
headlights reminder (for the vehicle in traffic)
•dimmer (2 modes of brightness e.g. day/night)
signal from headlights relay
(ref. to section 2.4.7) 1
VIII •fan cooler status (on/off)
signal from fan cooler relay
(ref. to section 2.4.7) 1
IX •RPM
f
rom
fuel consumption signal (some petrol
engines) or signal from RPM hall sensor 0 (1)
X
•
boost/turbo pressure + alerts +
real
-
time
chart
•oil pressure + alerts + real-time chart
•fuel pressure + real-time chart
pressure sensor
(voltage or resistance type) 1 - for each sensor
XI
•
lean/reach real
-
time chart from O2 sensor
signal from o2 lambda sensor
1
XII •
air fuel ratio (AFR
or LAMBDA
–
2 channels
) + alerts + real
-
time
chart signal from wideband o2 controller 1
XIII
•
exhaust temperature (EGT
–
4 channels
) + alerts + real
-
time chart
signal from EGT controller
1
XIV •gear indicator
req.
of
groups III & IX (measurement from
gear ratio) or signal from gear position
sensor
0 (1)
XV
•
data logger
function available only in UTCOMP
-
PRO
-
XVI •
digital output control (e.g. relay switch)
depends on temperature
or speed function available only in UTCOMP-PRO 1

- 11 -
2. Assembly manual
IMPORTANT: Read the following instruction before installing UTCOMP. The warranty does not include damage caused by improper installation.
2.1. General remarks
UTCOMP- has a 24-pin MOLEX connector. UTCOMP-PRO has a 24-pin and 12-pin MOLEX connectors. The kit comes with a plug with cables to solder.
Pay special attenti n t the numbered pins. All cables used to be install must be the dedicated automotive (FLRY), recommended 0. 5 – 0.5 mm
2
cross-section with insulation resistant to mechanical damage (abrasions, cracks etc.). All connections must be effectively soldered and hotair shrink
insulation (unconnected wires too). First you need to solder all the needed wires to the pins, and only then connect the plug to the socket device.
Bef re the first c nnecting plug t the device, make sure that the appr priate signals have been s ldered t the c rresp nding pins f
the plug. Connect the LCD/OLED display before connecting the 24-pin connector.

- 12 -
2.2. Pinout
Connectors pinout (module side): Plugs pinout (wire side):
Connector "A" (UTCOMP and UTCOMP-PRO) Connector "B" (UTCOMP-PRO)
PIN LABEL PIN LABEL PIN LABEL PIN LABEL
A1 SW_GND A13 - B1 DigInUser (RPM) B7 DigOutUser (5V ax 100 A)
A2 - A14 SW_3 B2 Adc3 (0-5V) B8 AdcVcc2 (0-5V, +5V PULL-UP)
A3 SW_2 A15 SW_1 B3 Adc4 (0-5V) B9 Adc5 (0-30V)
A4 DS18B20-A_GND A16 DS18B20-B_GND B4 DS18B20-D_GND B10 DS18B20-C_GND
A DS18B20-A_DQ (signal) A17 DS18B20-B_DQ (signal) B5 DS18B20-D_DQ (signal) B11 DS18B20-C_DQ (signal)
A6 DS18B20-A_VCC (+5V OUT) A18 DS18B20-B_VCC (+5V OUT) B6 DS18B20-D_VCC (+5V OUT) B12 DS18B20-C_VCC (+5V OUT)
A7 BUZZER_GND A19 BUZZER_VCC (+5V OUT)
A8 Adc1 (0-5V) A20 AdcVcc1 (0-5V, +5V PULL-UP)
A9 Adc2 (0-5V) A21 DigInHC - HEADLIGHTS/COOLER
A10 DigInFc1 - FUEL CONS. SIGNAL A22 VEHICLE SPEED SIGNAL (VSS)
A11 DigInFc2 - LPG/RPM A23 +12/+24V IGNITION
A12 GND (vehicle ground) A24 +12/+24V BATTERY

- 1 -
2. . Pinout description
GROUP DESCRIPTION
Battery A12 (-), A24 (+) power supply for the device, safe range is +8V...+32V DC (0,6A fuse is built-in in UTCOMP odule)
Ignition (A23) positive voltage fro ignition switch (0V - low state, 5V and ore - high state) - wake up UTCOMP fro sleep ode
SW... output for the three-button keypad ( onostable switches, powered +5V fro UTCOMP, press button shorts to GND)
DS18B20... output for digital te perature sensors (3 wires for each sensor) – keep out for power supply! – reverse connection VCC/GND can da age sensor
Buzzer... pinout for buzzer (VCC = +5V OUT)
Adc... input voltage signal fro analog sensors, e.g. la bda o2 sensor, wideband o2 controller, pressure sensors, te perature sensor (NTC), TPS etc.
AdcVcc... input for resistance sensors (pull-up to +5V fro UTCOMP), e.g. te perature sensor (NTC), resistance pressure sensors etc.
DigInFc1 (A10) input injector control signal (PWM 0V… +12V, or 0V….+5V) or fuel consu ption signal (PWM/FREQ)
DigInFc2 (A11) input signal fro the LPG syste (e.g. status LED indicator or electrovalve: 0V (OFF) – petrol +3…12V (ON) – lpg) or RPM signal fro hall sensor
DigInHC (A21) input signal fro headlights or fan cooler relay: +12V (ON), 0V (OFF)
DigInUser (B1) user input signal, e.g. RPM signal fro hall sensor
DigOutUser (B7) user output signal, e.g. relay 5V@100 A control
VSS (A22) input signal fro vehicle speed sensor - VSS (0V – low state, 5V and ore – high state)

- 14 -
2.4. Wiring diagram

- 15 -
2.4.1. POWER SUPPLY
Pin A24 connect to +12V/+24V (BAT), and pin A23 to +12V/+24V ignition switch (voltage occurs when the ignition key is turned on). Pin A12
connect to the vehicle ground (GND). The power line is already protected with 0,6 A fuse built-in UTCOMP, so additional fuse is not necessary.
2.4.2. KEYBOARD
Kit includes three-button keyboard. You should solder 4 wires to keyboard from UTCOMP: A1, A15, A3, A14.

- 16 -
2.4. . BUZZER
2.4.4. TEMPERATURE SENSORS DS18B20
Kit includes two digital temperature sensors DS18B20. Each sensor has terminals: GND (GROUND), DQ (SIGNAL) AND VCC (POWER SUPPLY).
Pay special attention to the outputs – it is easy for mistake changing side wires and burning the sensor (if mistake is done then nothing may be
displayed on the screen). Isolation wire leads are recommended using hotair shrink insulation
1
. In UTCOMP- application you can associate sensors with
temperatures, so connection order does not matter. For inside temperature sensor we recommend to place it in the place of free heating air, sun rays
1
please take a look at short video tutorial: https://www.youtube.com/watch?v=R8Z66qtYowA

- 17 -
etc. For outside temperature sensor we recommend to place it ahead cooler in a low place or at the bottom of side mirror. The correct placement of
sensors is a key influence on subsequent accuracy of the actual temperature.
Additional tutorial is available on forum: http://www.reveltronics.com/forum/viewtopic.php?f=28&t=120
2.4.5. FUEL CONSUMPTION SIGNAL
Injector control signal (PWM) or dedicated fuel consumption signal (PWM/FREQ) connect to pin A10. There are few places when you should looking
for these signals - it depends on engine type:
Petrol engines:
•option 1 : directly on the injector connector – two pins should be in there (or more in case of mono injection). When the engine is ON, one pin is
+12V constant signal, the other one is pulse signal 12V…0V (PWM injectors GND controlled). Pulse signal should be connected to pin A10 of
UTCOMP (sample waveform is shown below),
•option 2: to the appropriate pin in the ECU connector (injector control) - pinout for ecu connector can be found in electrical documentation
(wiring diagrams) of the vehicle

- 18 -
Petrol engines with LPG:
•option 1: to the appropriate pin in the ECU connector (petrol injector control) - pinout for ecu connector can be found in electrical documentation
(wiring diagrams) of the vehicle. You should not connect directly to injector connector because there is no signal when engine is running on lpg.
Diesel engines:
In diesel engines you should looking for dedicated fuel consumption signal (PWM or FREQ). Usually it is called as “Trip Computer – TC”, “fuel
consumption signal” or less specific: “instrument panel signal”, “multifunction display” , “mfa” etc. Remember – some diesel engines do not have such
signal. Feel free to contact us if you have problems with locating such signal – we will try to help.
•option 1: to the appropriate pin in the ECU connector,
•option 2: the signal may be often located on the injection pump connector,
•option : in most cases appropriate signal can be found in instrument panel connector (e.g. in TDI, HDI, DTI, TDDI etc. ) - note: CAN signal is
not supported!
•option 4: in cars with PD injectors (e.g. 1.9TDI PD) signal can be taken directly from appropriate pin in the ECU connector (PD injector control)
but most these engines have dedicated fuel consumption signal (fuel consumption measurement will be more accurate with dedicated signal)
Please n te: In every case search for PWM (pulse width modulated) or FREQ (frequency pulses) signal (controlled by the GND or +12V). Sample
waveform is shown above. Pulse width (for PWM signal) or pulse quantity (for FREQ signal) should be proportional to the current consumption. In most
cases injector control signal will be PWM(-) controlled. Dedicated fuel consumption signal will be PWM(+) controlled (rarely FREQ) but this is no rule.
Later, you will need to set type of signal in UTCOMP settings.
In latest diesel vehicles with CAN system (generally since ‘05) there is not available dedicated fuel consumption signal. Most diesel engines from 1994
to 2004 (with electronic injection pump or common rail) have such signal.
There is also alternative method for common-rail engines without fuel consumption signal - there are two important requirements:

- 19 -
•possibility to measure fuel injection timing (from injector
2
) – max 150V amplitude,
•possibility to measure fuel pressure: signal from fuel pressure sensor (it's located on common-rail tube) connect to Adc1 or Adc2 inputs and set
input configuration as "fuel pressure sensor (diesel common-rail)"
2.4.6. VSS – Vehicle Speed Signal
The pulse speed signal (VSS) connect to pin A22. There are few places when you should looking for speed signal:
•option 1: some vehicles have a VSS signal in the ISO socket of the radio (function volume up with increasing velocity) – generally pin 1 in socket
A (called as SPD, GAL, VSS etc.)
•option 2: in most cases speed signal can be located in instrument panel connector (marked usually as speed1, speed2, vehicle speed etc.) –
take a look in the vehicle's electrical system documentation for the signal connector from tachometer (pinout).
•option : if vehicle is with electronic injection system , VSS signal can be found at the ECU connector (even for vehicles with tachometer "on
cable") – check ECU pinout (electrical system documentation) which pins to select,
•option 4: connect straight to VSS sensor, which you can find in a gearbox body. The sensor can be two-pins (power and VSS signal) or three-
pins (additionally the GND wire is connected). Connect to the pin on which there is a pulsed signal (0..+12V) when the car is moving (usually
few pulses for one turn of the wheel),
•option 5: if your car is equipped with ABS than required signal can be found in one of the ouputs of ABS control unit,
•option 6: if your car definitely does not have VSS signal than you can install universal speed sensor (hall sensor + magnets) – described in other
manual (can be downloaded from our webpage)
Below is an example of a pulse signal from the VSS sensor (vehicle pushed)
2
piezoelectric injectors with 2-pin connector are compatible ; for electromagnetic 2-pin injectors you will need additional signal converter, e.g. CR-PWM

- 20 -
In most latest cars, instead of speed sensor, there is signal sending from ABS control module or from instrument panel – signal will be the same as
this one at the picture above.
There is a small percentage of vehicles that have electronic fuel injection, and do not have the speed sensor. In this case, the sensor can be installed
yourself (in the gearbox - if the manufacturer predicted such possibility), or assembly the usual hall sensor (option 6).
2.4.7. HEADLIGHTS or FAN COOLER
In order to activate the signaling function of the radiator fan OR headlight reminder, appropriate signal (+12V when the fan/headlights is turned on,
0V when turned off) should be connected to pin A21. After assembling, appropriate option should be chosen in UTCOMP PC application (cooler state
info or headlight reminder).
2.4.8. ANALOG SENSORS - Adc and AdcVcc inputs
UTCOMP- supports analog inputs (Adc1, Adc2, AdcVcc1), UTCOMP-PRO supports 7 analog inputs (Adc1, Adc2, Adc , Adc4, Adc5, AdcVcc1,
AdcVcc2). Example of use: analog temperature sensors (NTC), boost pressure from MAP/MAF, oil pressure sensor, lambda o2 sensor, AFR readings
from wideband o2 controller, exhaust temperature from EGT controller, fuel level, gear indicator etc.
Adc1, Adc2, Adc , Adc4 and Adc5 are high impedance, buffered inputs - you can connect voltage signals from any analog sensors assembled in the
vehicle. Adc1-Adc4 are 0-5V range. Adc5 input is 0- 0V.
AdcVcc1 and AdcVcc2 inputs have built-in divider with pull-up to +5V, so you can connect to them any additional resistance sensors, e.g. NTC
temperature sensors, resistance pressure sensor, fuel level sensor etc. UTCOMP measures voltage drop directly at resistance sensor. Please n te: y u
sh uld NOT c nnect any fact ry vehicle sens rs t AdcVcc inputs! (factory sensors are already powered from vehicle installation - in this case
connect voltage signal to any of Adc1 - Adc5 inputs).
In UTCOMP application you can associate each sensor with appropriate analog input, so connection order does not matter. For all analog inputs you
can activate oscilloscope (real-time voltage drawing on chart) and set dedicated alerts (e.g. to low oil pressure, to high boost pressure, to high
engine/oil temperatures, AFR outside safe range, to high EGT etc.).