CAR-TECH CT3010 User manual

Brake tester – decelerometer CT3010
CAR-TECH
USER’S GUIDE
Version 8.++

Index
Chapter 1
- Application and measurements 1.1
- Specifications 1.2
- Decelerometer accessories and options 1.3
- Principle of measurement 1.4
- Report printing 1.5
Chapter 2
- ontrol Panel and onfiguration 2.1
- onfiguration 2.2
- alibration, Measurements and Printing 2.3
- Menu Selection 2.4
- Data learing 2.4.0
- Recording Interval 2.4.1
- The six possibilities to start the measurement 2.4.2
- Threshold 2.4.3
- Display ontrast 2.4.4
- Backlight 2.4.5
- Time and Date 2.4.6
- Header of the report 2.4.7
- Filter 2.4.8
- Basic Menu Settings 2.4.9
- onnection to a P 2.5
- Stability of the Measurement 2.6
Chapter 3
- Service and Maintenance 3.1
- Battery harging 3.2
- Replacement of paper and ink ribbon 3.3
2

Glossary
Application
Fast check up of brake systems of the traffic vehicles intended for:
•stations for the technical inspections of cars
•car repair shops
•car owners
•the benefit of judicial experts and police
Type:
Portable Decelerometer set with built-in printer, L D display and keyboard, including
the software for P Windows. Optional connection of force sensor or pressure
sensor.
easured quantities:
The measurement of the overall brake deceleration and its dependence on the
controlling force applied to the brake pedal or its dependence on the air pressure in
the air pressure brakes. The results of measurements are graphs of the time
dependencies and the numerical calculated average value of the overall
deceleration
Specifications:
Maximal braking deceleration ... 20 m/s2
ontrolling force applied to the brake pedal ... up to 1000 N
Air pressure in the air pressure brake.... up to 1 MPa
Hydro pressure in the oil pressure brake.... up to 20 MPa (option)
Weight... up to 8T (option)
Sampling rate 1..50s for T3010
Sampling rate 5..300s for T3010XL
Printing
•graph with numerical values
•date and time of measurements
•company headings
•two lines of measurement confirmation
Power supply
•build in NiMH rechargeable battery. harging from A adapter.
easured data memory
•storage of 128 measurements. Possibility of printing any of the stored
measurements.
3

Decelerometer CT 3010 accessories
•force sensor for the measurement of the force applied to the brake pedal
•pressure sensor for the air pressure measurement in the air pressure brake
•A adapter for charging of the NiMH battery
•external start button
•interface cable for connection to P computer
•Software Program for Windows
•User’s manual
•arrying ase
4

Chapter 1
1.1 Application and measurements
Decelerometer is used for the measurement of the overall brake deceleration of the
traffic vehicles. The value of deceleration is measured, as well as its dependence on the
controlling force applied to the brake pedal or its dependence on the air pressure in the
air pressure brakes. The results of measurements are: graphical records time related,
the numerical calculated average value of overall deceleration and the average value of
control force or the average value of air pressure.
The following three options can be ordered:
- Decelerometer only
- Decelerometer with external sensor for controlling force applied to the brake pedal
- Decelerometer with external sensor for air pressure in the air pressure brake system
The measurement of the controlling force applied to the brake pedal and the
measurement of the air pressure in the air pressure brake is possible only with the
external force sensor or with the external pressure sensor. After the required sensor is
connected, the decelerometer will configure automatically. The external sensors are
supplied as accessories.
External sensors from different decelerometers are not exchangeable without the
manufacturer’s calibration.
The measurement is very easy. The instrument must be placed into the vehicle in such
a way, that the arrow on the instrument coincides with the direction of travel. With the
help of levelling screws and built-in levelling libel the instrument is adjusted into exact
horizontal position. After switching-on, the display leads through the instructions. When
the calibration is finished, the vehicle can be set into the motion. The measurement is
started by pressing the starting button. Than the vehicle is slowed-down until stop by its
braking system. The wheels are not allowed to blocked. The maximal values appear at
the display and the detailed report is printed. The results of measurements will remain in
the internal memory as long as the power is switched-on.
1.2 Specifications
Design and specifications of the decelerometer are based on the regulation of Ministry
of transport,“ About regular technical inspections and emission measurements of the
road-bound vehicles “ No 103/1995 Sb/ Z.
Measurement Ranges:
- Braking deceleration 0 - 20 ms-2
- ontrolling force applied to the brake pedal 0 - 1000 N
- Air pressure in the air pressure brake 0 - 1 MPa
Accuracy of the measurements:
- braking deceleration +/- 3 %
- controlling force applied to the brake pedal +/- 35 N
- air pressure in the air pressure brake +/- 25 kPa
5

Printing :
- ompany headings
- Date and time
- Graphical expression with numerical values
- Two lines containing the confirmation of measurement
- Additional information about decelerometer configuration
Power supply:
- build in NiMH rechargeable battery, charging from A adapter
Measured flash data memory:
- Memory for up to 128 measurements. Printing of any stored measurement
Features:
- Two line L D display with back light
- Keypad with 9 keys
- Built-in matrix printer
- Possible connection to P with control and evaluation program
1.3 Decelerometer accessories and options
The decelerometer consists of measuring instrument itself, set of options and
accessories which facilitate the measurements:
- Decelerometer T3010
- Pressure sensor 1MPa with a cable
- Force sensor 1000N with a cable
- External start button
- A adapter for NiMH battery
- interface cable for connection to P computer
- Diskette with program for P (Windows)
- Extra paper for the printer
- Users manual
- arrying ase
Option (extra order)
- Pressure hydro 20MPa sensor with cable
- Weight sensor 8T with cable
Use the pressure sensor or the force sensor, depending on the application. The
interface cable to P computer may be connected. The decelerometer may be
configured and used as stand alone or the measured data may be transferred to the
P . With the help of external start button the measurement can be initiated by the driver
of the vehicle.
6

1.4 The principle of measurement
The measurement is based on simultaneous recording of vehicle brake deceleration
and the controlling force applied to the brake pedal, or recording of the vehicle
deceleration and the air pressure in the air pressure braking system. All data are stored
in the internal memory after the button Start has been applied. The measurement of the
deceleration, the controlling force applied to the brake pedal and the air pressure in the
air pressure brake is realised with the build-in deceleration sensor, the force sensor or
the pressure sensor. At the end of the measurement the maximal values are shown at
the display. A detailed report is printed. During the printing the average value of the
overall deceleration, the average value of control force or the average value of the air
pressure is calculated.
At the beginning of the measurement, the recording interval has to be set. The range of
setting is from 1 to 50 seconds (5 to 300 seconds for T3010XL). An averaging filter is
available with a filtering constant from 0 (no filter) to 10 (long time constant).
There are more possibilities to start the measurement and the recording:
Starting button EAS
External starting button
Setting the threshold value
or combination of the these above.
The recording clearly shows whether the measured smallest average value of the
overall deceleration is as prescribed, and whether the controlling force applied to the
brake pedal or the air pressure have achieved the required values.
The results of measurements (up to 128 data sets) will be stored in its flash memory
and may be printed. With the help of the supplied program, the records may be
transferred to the P .
After each measurement the hydro sensor or the weight sensor can be connected and
used. Press the button EAS again. After the display shows steady reading, press
EAS again. The pressure or weight measurement are stored.
7

1.5 Report printing
When all measurements are stored in the memory, the report can be printed. The
record contains the company’s head (can be disabled), time and date, and the
measured values versus time. The maximum deceleration value and the duration of
measurements will be printed as well. After entering the time interval, in which the
average values have to be calculated, the average value of overall deceleration and the
average value of the force or the air pressure will be calculated and printed.
If hydro sensor or weight sensor is used, their results will be printed as well. Two lines
of text are added to the printed report, containing the identification of vehicles and
confirmation of the measurement.
The printing on the 57.5mm wide paper is done with ink. This guarantee long lasting
quality. The printing of one report takes about 15 seconds. The report may be printed
several times, but the selected interval in which the average values have to be
calculated must be entered all the time. The reports of previous measurements may be
printed more times as well.
8

hapter 2
2.1 Control Panel and Configuration
The Decelerometer T3010 is controlled by using the front panel keyboard, with power-
on/off keys. Three keys are used in the measurement mode, and four keys in the menu
mode.
With the keys ON and OFF the power is applied to the instrument. After the power is
switched on, the display shows
The internal memory and the calibration data are tested. The time and date is displayed
for 3 seconds, provided that the internal clock is set. After this test the following text will
be displayed
The instrument has to be set into exact horizontal position with the help of levelling
screws and built-in levelling libel. This step is mandatory in order to garantee the correct
function of the decelerometer. Pressing of any key initiates the calibration, the setting of
zero offset and starting of the configuration test. At the end the selected configuration of
decelerometer is displayed for the short time.
9
Brake tester
***
eter
Horizont set
with screw

Decelerometer only:
Decelerometer and external force sensor:
Decelerometer and external pressure sensor:
The instrument requests for switching into the measuring or the menu mode.
Selection by EAS or ENU. When a measurement has already been done, this
information appears, e.g. with decelerometer only:
Decelerometer and external force sensor:
Decelerometer and external pressure sensor:
10
Select
funct
ion
Deceleromete
r
Deceleromete
r
Force sensor
Deceleromete
r
Pressure
Measure N. 1
Max 9. m/s2
Measure N. 1
9. m/s2 500N
Measure N. 1
9. m/s2
300kPa