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Manual Delta LTL2000S

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  • Delta LTL2000S - page 1

    DELTA ⋅ Venlighedsvej 4 ⋅ DK-2970 Hørsholm ⋅ Denmark ⋅ Tel. (+45) 72 19 40 00 ⋅ Fax (+45) 72 19 40 01 ⋅ www.delta.dk LTL2000S / SQ RETROREFLECTOMETER Manual ...

  • Delta LTL2000S - page 2

    DELTA LTL2000S(Q) Retroreflectometer i DISCLAIMER The information contained in this document is subject to change without notice. DELTA LIGHT & OPTICS MAKES NO WARRANTY OF ANY KIND WITH RE- GARD TO THIS MATERIAL, INCLUD- ING, BUT NOT LIMITED TO, THE IM- PLIED WARRANTIES OF MERCHAN- TABILITY AND FITNESS FOR A PAR- TICULAR PURPOSE. DELTA LIGHT &a ...

  • Delta LTL2000S - page 3

    DELTA LTL2000S(Q) Retroreflectometer ii INDEX SECTION 1...................................................................................................................... .......... 1 INTRODUCTION ............................................................................................................................. 1 Introduc tion ........ ...

  • Delta LTL2000S - page 4

    DELTA LTL2000S(Q) Retroreflectometer iii APPENDIX C .......................................................................................................................... 40 SPECIFICATION .................................................................................................................. ......... 40 General Characteristics R l .. ...

  • Delta LTL2000S - page 5

    DELTA LTL2000S(Q) Retroreflectometer 1 SECTION 1 INTRODUCTION Introduction This manual covers both LTL2000S and LTL2000SQ. Some functions will only be available on LTL2000SQ and will be printed in blue colour. The LTL2000S is a portable field instrument, in tended for measuring th e reflection properties of road markings “Rl” as seen in the veh ...

  • Delta LTL2000S - page 6

    DELTA LTL2000S(Q) Retroreflectometer 2 Serial communication on RS232 port gives exte nded comm and, calibration, diagnostics and data dump facilities. The LTL2000S(Q) is powered by a rechargeable lead acid battery, giving several hours of measurement capacity. A mains powered batt ery charger is supplied as standard. LTL2000S(Q) features • Portab ...

  • Delta LTL2000S - page 7

    DELTA LTL2000S(Q) Retroreflectometer 3 Getting started Buttons M e a s u r e Me n u En t er Hom e O F F C ali b r at e Pr i n t Sc ro l l d o w n S c r ol l u p O N Measuring Turn the instrument on by pressing and holding the button until the LCD shows: Calibrate the instrument if necessary, see Calibr ation page 6 . Place the instrument on the roa ...

  • Delta LTL2000S - page 8

    DELTA LTL2000S(Q) Retroreflectometer 4 scroll through the status list to see the possible cause of the problem. For further description on the error messages see Status Display page 19. Alternatively or select the menu Print Status to print a complete instrument status. Note: Wet night measurement considerations: Making wet night measurements on wa ...

  • Delta LTL2000S - page 9

    DELTA LTL2000S(Q) Retroreflectometer 5 the Mean calculation function is enabled and there is m ore than 1 measurement in the calcula- tion then the number of meas urements is shown first. Scroll Keys: In normal mode the key activates the Clear Top Log f unction, in m enu mode it is used to scroll through the menu functions and to increment shown va ...

  • Delta LTL2000S - page 10

    DELTA LTL2000S(Q) Retroreflectometer 6 Calibration - LTL2000S A calibration should always be carried out befo re starting a new seri es of measurements. Calibration is done by placing the calibration unit underneath th e instrument between the rails. The easiest way to place the unit is to tilt the instrument backwards. Figure 1. How to tilt the in ...

  • Delta LTL2000S - page 11

    DELTA LTL2000S(Q) Retroreflectometer 7 The display shows: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 To verify the calibration do a Rl measurem ent on the normal before rem oving the normal in step 8. To document the calibration press the key to print. In the example above the Rl function is now calibrated to a Rl value of 150. If an e ...

  • Delta LTL2000S - page 12

    DELTA LTL2000S(Q) Retroreflectometer 8 Calibration - LTL2000SQ A calibration should always be carried out befo re starting a new seri es of measurements. The LTL2000SQ is supplied with two calibration units. One for Rl and one for Qd. The order of R1 / Qd calibration is not cr itical . Qd calibration can be done before the Rl cali- bration and reve ...

  • Delta LTL2000S - page 13

    DELTA LTL2000S(Q) Retroreflectometer 9 If the key is pressed the calibration result is printed. In the example above the Qd f unction is now calibrated to a Qd value of 215. If an error is detected during the calibration procedur e then the display will indicate this. Rl Calibration: See Rl calibration page 6. Figure 2. How to place the calibration ...

  • Delta LTL2000S - page 14

    DELTA LTL2000S(Q) Retroreflectometer 10 Remember :  Recharge battery when possible. Never le ave battery discharged for longer periods of time.  Keep protection window, light tr ap and calibration unit clean.  LTL2000S(Q) is an optical precision instrument, handle with care.  Store in clean and dry environment ...

  • Delta LTL2000S - page 15

    DELTA LTL2000S(Q) Retroreflectometer 11 SECTION 2 GENERAL INFORMATION Rl Measurement The Rl part of the LTL2000S(Q) Retroreflectometer measures the Rl (coefficient of retro re- flected luminance) parameter. The Rl param ete r repres ents the brightne ss of the road mark- ings seen by drivers of motor vehicles by headlight illumination. The illumina ...

  • Delta LTL2000S - page 16

    DELTA LTL2000S(Q) Retroreflectometer 12 The illuminations field with a length of 200 mm length and 43 mm wide gives a large measur- ing measurement field of 85 cm 2 . Combined with an observa tion field of 350 mm length this gives a considerable capability to m easure prof iled and textures m akings but also a high reli- ability for obtaining corre ...

  • Delta LTL2000S - page 17

    DELTA LTL2000S(Q) Retroreflectometer 13 Figure 4: Simulation of profiled markings and/or un-even markings: Lift of a retrore- flectometer to a height H and the resulting R L values. H 0 1 2 3 4 5 H (mm) 500 400 300 200 100 0 R of a road mark ing L b e a m s s e p a r a t i n g ...

  • Delta LTL2000S - page 18

    DELTA LTL2000S(Q) Retroreflectometer 14 Figure 5: The reach of the LTL 2000S(Q) makes it capable of measuring profiled road markings of profile height up to 5 mm, or profile gap up to 20 cm. The advantage of the DELTA optical arrangement with a smaller illumination field in a large measurement f ield is illustrated in the f igure 6 below compared t ...

  • Delta LTL2000S - page 19

    DELTA LTL2000S(Q) Retroreflectometer 15 Figure 6: The LTL2000S(Q) illumination s/measurement fie lds ( 5mm profile capabil- ity) compared to a system with identical fields (< 0.5 mm profile capa bility) clearly shows the advantage of the LTL2000S(Q) for obtaining reliable and reproducible meas- urements on real markings. Qd Measurement The Qd pa ...

  • Delta LTL2000S - page 20

    DELTA LTL2000S(Q) Retroreflectometer 16 Figure 7. Qd illumination system 512 515 516 517 51 8 512 Road marking surface – Light source – Diffusing box with whit e interior finish 517 Thin perforated plate 518 Aperture into diffusing box ...

  • Delta LTL2000S - page 21

    DELTA LTL2000S(Q) Retroreflectometer 17 Instrument function Physically the instrument is dominated by the “control tower”. The tower contains the Rl il- luminating and observation system and the control electronics. The unit on top of the base structure contains the Qd illum ination system, the observation sys- tem is the same for both Rl and Q ...

  • Delta LTL2000S - page 22

    DELTA LTL2000S(Q) Retroreflectometer 18 The LTL2000S(Q) is factory calibrated. Neverthe less start important m easurements with a calibration. Study the Retroreflectometer status and error messages if any. See also Section 4 – Maintenance (page 25). When the battery voltage becomes low a warning is shown in the display (W). It is still possi- ble ...

  • Delta LTL2000S - page 23

    DELTA LTL2000S(Q) Retroreflectometer 19 SECTION 3 KEYBOARD, DISPLAY AND FUNCTIONS Keyboard Layout . . . . . . Figure 8. Keyboard. Keyboard functions Key Label Key Function Turns the instrument On . Hold activated until the sign on message appears in the Display. Turns the instrument Off . Terminates all activity and powers off. Take a measurement a ...

  • Delta LTL2000S - page 24

    DELTA LTL2000S(Q) Retroreflectometer 20 Enter - Activates selected function, a ccepts changed settings and con- firms choices. Home (Home position) - Cancels select ed function or m enu and return to top control level disp laying the latest measurement resu lt. Outputs the latest measurem ent or calibration result to the p rinter. Printout has to f ...

  • Delta LTL2000S - page 25

    DELTA LTL2000S(Q) Retroreflectometer 21 Entering Measurement id: To enter / edit the sequence id press the button when in home position . Use the button to scroll through the alphabet in di rection A..Z (starting with the space character), 0..9. The button will scroll through the alphabet in opposite direction. When the wanted character is shown pr ...

  • Delta LTL2000S - page 26

    DELTA LTL2000S(Q) Retroreflectometer 22 the display one at a tim e using the keys. An * after a text means that the message onl y is shown at special occasions e.g. an er- ror or warning! LTL2000S(Q) Display Explanation ( The following messages are possible) R: 146 Q: 64 The latest measurement results. Rl Signal : 143 Rl Out of Limit* Rl Sig Overfl ...

  • Delta LTL2000S - page 27

    DELTA LTL2000S(Q) Retroreflectometer 23 LTL2000S(Q) Display Explanation ( The following messages are possible) Qd Out of Limit* Qd Sig Overflow* Qd Stray L : 0 Qd High Stray L* VBat Qd : 11.3V Low VBat Warning* The Qd value exceeds the theoretical value of 318. See Rl Sig Overflow. The measured Qd stray light level. See Rl High Stray L. See VBat Rl ...

  • Delta LTL2000S - page 28

    DELTA LTL2000S(Q) Retroreflectometer 24 • Disable Id Clear the measurement id. • Free Log Shows the numbers of free log positions in the log. Pressing will clear the log. In order to avoid accidental erasing the log, a second is required. • Print Log Output all the data in the log to the printer. Press to select. The display now shows the num ...

  • Delta LTL2000S - page 29

    DELTA LTL2000S(Q) Retroreflectometer 25 SECTION 4 MAINTENANCE General care The Retroreflectometer is cons tructed for outdoor use in ordinary good weather conditions. It will stand moist weather with wet roads, but cau tion m ust be taken against rain or splashes and dirt from traffic. The LTL2000 S(Q) Retroreflectometer is an optical instrument an ...

  • Delta LTL2000S - page 30

    DELTA LTL2000S(Q) Retroreflectometer 26 Fuses Fuses, two pieces, are placed at the rear of the instrument. The charg ing fuse protects the bat- tery against short circuit and ot her errors in the charging co nnector, charger or charging sys- tem. The battery fuse protects battery and electronics against shor t circuit and othe r errors in the elect ...

  • Delta LTL2000S - page 31

    DELTA LTL2000S(Q) Retroreflectometer 27 mild household detergent. To ensure reliable measurem ents, it is recommended that the calib ration unit is periodically recalibrated to a traceable sta ndard. DELTA Light & Optics o ffers calibration traceable to PTB (Physikalsich-Technishe Bundesanstalt). Fo r information contact your distributor or DEL ...

  • Delta LTL2000S - page 32

    DELTA LTL2000S(Q) Retroreflectometer 28 Printer The printer is a high speed high quality mini th ermal printer. It has only a few m oving parts and does not require any special or periodic maintenance. Paper specification: • thermal paper • width: 57.5 mm • diameter: 31 mm (max.) Replacing the paper is easily done by opening the paper contain ...

  • Delta LTL2000S - page 33

    DELTA LTL2000S(Q) Retroreflectometer 29 APPENDIX A COMMUNICATION FACILITIES RS-232C specification The LTL2000S(Q) is equipped with a communication facility that enables the use of a simple data terminal or an ordinary PC type com puter for control of LTL 2000S(Q) functions and for log data acquisition. The computer or terminal connects to the Instr ...

  • Delta LTL2000S - page 34

    DELTA LTL2000S(Q) Retroreflectometer 30 Connections in the 9 pin D-Sub connector. pin # Function Signal Direction 3 Receive Data Data to LTL2000S(Q) 2 Transmit Data Data from LTL2000S(Q) 5 Signal Ground Signal Ground Connection example #1. PC with 25-pin D-Sub communication port. Cable connections: PC Port DTE pin name LTL DTE 1 FG X 2 TxD -- - 3 3 ...

  • Delta LTL2000S - page 35

    DELTA LTL2000S(Q) Retroreflectometer 31 Connection example #2. PC with 9 pin D-Sub communication port. Cable connections: PC Port DTE pin name LTL DTE 1 CD X 2 RxD -- - 2 3 TxD -- - 3 4 DTR X 5 SG -- - 5 6 DSR X 7 RTS X 8 CTS X 9 RI X 9-pin female D-SUB 9-pin male D-SUB As it can be seen, the in terconn ections have been held to an absolute minimum ...

  • Delta LTL2000S - page 36

    DELTA LTL2000S(Q) Retroreflectometer 32 Command format All LTL2000S(Q) commands are built using the following tem plate. Command (one ore more letters) Delimiter (one ore more spaces, optional) Parameter (Integer or Real number, option al) Command End (Carriage Return, mandatory) Example #1: The user wants to see how the Autom atic Off tim er is se ...

  • Delta LTL2000S - page 37

    DELTA LTL2000S(Q) Retroreflectometer 33 Command set The instrument is equipped with a serial communication port pr imarily for log data acquisition, calibration and test, however a ll norm al instrument functions can be controlled from this inte rface. The following commands have been defined Command set Command Parameter Response Meaning DAn None ...

  • Delta LTL2000S - page 38

    DELTA LTL2000S(Q) Retroreflectometer 34 Command set Command Parameter Response Meaning Rl Status Code 0 00000000 2002 Aug 12 13:53:19 LTL2000SQ v1.0 s/n:n Rl status code Time for Rl measurem ent Instrument Id OTn None 59 180 Off Timer = 300 sec. Off Func: Off Off Timer: = 180 sec. Automatic turn off time when not in use. Range 60 to 600 sec. Disabl ...

  • Delta LTL2000S - page 39

    DELTA LTL2000S(Q) Retroreflectometer 35 Command set Command Parameter Response Meaning TO None Sensor Off Turn sensor off (power off) VAn None 11.50 VBat Alarm: 11.00 Volt VBat Alarm: 11.50 Volt Set point for low bat warning New set point for low bat warning VB None VBat = 12.77 Volt Measure actual voltage on lead-acid battery VS None VBat Lamp Off ...

  • Delta LTL2000S - page 40

    DELTA LTL2000S(Q) Retroreflectometer 36 APPENDIX B Status code interpretation Rl Status code interpretation: bit pattern value Description Status Code: 00000001 1 Error in Rl Result Status Code: 00000010 2 Stray Light Warning Status Code: 00000100 4 Log full Warning Status Code: 00001000 8 Not defined Status Code: 00010000 16 Low Battery Warning St ...

  • Delta LTL2000S - page 41

    DELTA LTL2000S(Q) Retroreflectometer 37 APPENDIX C Print outs Result Printout Examples of result printouts showing the meas ured values, the Measurement Id and the number of measurem ents with this id, th e number of measurem ents used to calculate the m ean value, the date and time the measurement was taken, the num b er of data in the data log, t ...

  • Delta LTL2000S - page 42

    DELTA LTL2000S(Q) Retroreflectometer 38 Note: The Calibration printout can only fo llow directly after a calibration with the key. Log Printout Example of log printout from LTL2000SQ The printout shows the instrument s/n, number of entries, number of free log entries, a data header and then all the data listed with the ne west first, if one of the ...

  • Delta LTL2000S - page 43

    DELTA LTL2000S(Q) Retroreflectometer 39 Status Printout Example of status printout. Th e printout is done f rom the Menu system. Date and time for printout Zero adjust data Rl calibration data Rl measurement data Qd Calibration data Qd measurement data Voltage measurements Log status Error info Instrument info Firmware info ...

  • Delta LTL2000S - page 44

    DELTA LTL2000S(Q) Retroreflectometer 40 APPENDIX C SPECIFICATION General Characteristics R l Illumination angle to the road ......................................................................................... 1.24º Observation angle to the road.......................................................................................... 2.29º Eq ...

  • Delta LTL2000S - page 45

    DELTA LTL2000S(Q) Retroreflectometer 41 Electrical Characteristics EMC ..................................................................................................................... EN 5008 1-1 EN 50082-1 Power supply: Battery .................................................................... Build in 12 volt 3.5Ah sealed lead acid Externa ...

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