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DELTA

LTL2000S(Q) Retroreflectometer

2

Serial communication on RS232 port gives extended command, 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 battery charger is supplied as standard.

LTL2000S(Q) features

•

Portable self-contained instrument

•

Measurement in full daylight

•

Automatic stray light compensation and error diagnostics

•

Dry and wet surfaces

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Plane, textured & profiled markings

•

Measurement geometry and illumination corresponding to realistic viewing
condition in traffic

•

Direct digital read out

•

Automatic mean calculation

•

Built-in printer

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Real time clock

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Automatic data storage in internal non-volatile memory

•

RS232 serial communication for operation, data dump, extended control and di-
agnostics

•

Automatic programmable power off function

•

Easy calibration procedure

•

Calibration unit

•

Carrying case

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Содержание LTL2000S

Страница 1: ...DELTA Venlighedsvej 4 DK 2970 H rsholm Denmark Tel 45 72 19 40 00 Fax 45 72 19 40 01 www delta dk LTL2000S SQ RETROREFLECTOMETER Manual...

Страница 2: ...ANTY 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 OPTICS SHALL NOT BE LIABLE FO...

Страница 3: ...BOARD DISPLAY AND FUNCTIONS 19 Keyboard Layout 19 Keyboard functions 19 Clear log data 20 Measurement id 20 Mean Calculation 21 Menu system 21 SECTION 4 25 MAINTENANCE 25 General care 25 Protection wi...

Страница 4: ...0S Q Retroreflectometer iii APPENDIX C 40 SPECIFICATION 40 General Characteristics Rl 40 General Characteristics Qd 40 Electrical Characteristics 41 Environmental Characteristics 41 Mechanical Charact...

Страница 5: ...lighting To measure the Qd properties the luminance coefficient under diffuse illumination the road is illuminated with a diffuse source and the reflected light is again measured at an angle of 2 29...

Страница 6: ...nt Measurement in full daylight Automatic stray light compensation and error diagnostics Dry and wet surfaces Plane textured profiled markings Measurement geometry and illumination corresponding to re...

Страница 7: ...ormation s are automatically transferred to the internal data log for later readout to the serial communication port or printout The instrument can automatically calculate and display the mean average...

Страница 8: ...readings It is recommended to make the wet measurements at the lowest possible road temperature Print Result Press to print the result from last calibration or measurement to the printer Menu Press th...

Страница 9: ...t Scroll Keys In normal mode the key activates the Clear Top Log function in menu mode it is used to scroll through the menu functions and to increment shown values In normal mode the key activates th...

Страница 10: ...ly automatic and if the cali bration routine is followed precisely the retroreflectometer will now measure true Rl Rl Calibration Rl calibration step 1 to 8 actually consists of two calibrations a zer...

Страница 11: ...ample above the Rl function is now calibrated to a Rl value of 150 If an error is detected during the calibration procedure then the display will indicate this Note Mount Light Trap when Ready Zeroing...

Страница 12: ...ails see figure 2 page 9 The instrument automatically compensates for zero signal leakage and other possible error sources and calculates the calibration factor This process is fully automatic and if...

Страница 13: ...display will indicate this Rl Calibration See Rl calibration page 6 Figure 2 How to place the calibration normals The normal must be placed with this side up for the different calibrations Guidance pi...

Страница 14: ...Recharge battery when possible Never leave battery discharged for longer periods of time Keep protection window light trap and calibration unit clean LTL2000S Q is an optical precision instrument hand...

Страница 15: ...x 200 mm The optical specification complies with EN1436 The spectral sensitivity is eye matched us ing SMART optical filter designed and produced by DELTA The functional layout of the LTL2000S Q Rl op...

Страница 16: ...mm at the measuring angle of 2 29 relative to the surface 1 mm sin 2 29 25 mm The measuring area is larger than the illuminated patch and contains it but at some lift the illuminated patch moves partl...

Страница 17: ...tometer 13 Figure 4 Simulation of profiled markings and or un even markings Lift of a retrore flectometer to a height H and the resulting RL values H 0 1 2 3 4 5 H mm 500 400 300 200 100 0 R of a road...

Страница 18: ...6 below compared to a system with two identical fields Pro profiled textures markings on even markings and in situations where a small debris e g small stone the instrument is lifted tilted The advan...

Страница 19: ...height exceeding 2 mm please contact DELTA The illumination system recommended in EN1436 for obtaining the diffuse illumination for measuring of Qd is an integrating sphere but it is also stated that...

Страница 20: ...Q Retroreflectometer 16 Figure 7 Qd illumination system 512 515 516 517 518 512 Road marking surface Light source Diffusing box with white interior finish 517 Thin perforated plate 518 Aperture into...

Страница 21: ...keep the Retroreflectometer operating a normal working day The battery is recharged by use of an external charger Factory calibration The LTL2000S Q Retroreflectometer is factory calibrated This calib...

Страница 22: ...ttery voltage becomes low a warning is shown in the display W It is still possi ble to take measurements but when the voltage drops further readings can be erroneous If in doubt whether the readings a...

Страница 23: ...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 and show the result in the display All...

Страница 24: ...auto repeating with increasing repetition rate when held active Scroll down In normal mode the key activates the Edit Meas urement Id Seq Id function See Measurement id below In menu mode it functions...

Страница 25: ...ystem If the Rl Qd value shown in the display contains a decimal point then the shown value is a mean value The number of samples is displayed for one second after each measurement Press to redisplay...

Страница 26: ...getting into the instrument from outside Stray light levels under acceptable predefined limits is dis played as 0 Warning A high stray light signal can indicate prob lems with direct sunlight from a l...

Страница 27: ...in 12 V Battery A warning is given in the display if the voltage drops below its predefined minimum limit The warning will be displayed for one second before the VBat idle voltage is shown The actual...

Страница 28: ...ated Log Warn When the data log becomes full a warning can be shown in the display W Use to toggle Log Warn ON OFF function If off no warning is shown when the log becomes full Note If the log becomes...

Страница 29: ...ged battery is more capable of withstanding low tempera ture and ageing Battery charger is provided as a standard accessory for charging the battery from mains The output cable of the charger is equip...

Страница 30: ...no maintenance At life end they must be replaced It is recommended that replacing is done by trained personal Calibration unit The road marking is simulated by a piece of white ceramics mounted on a...

Страница 31: ...ero signals are simulated by a light trap made of two glossy and black plastic sheets moun ted in an acute angle If clean this will provide very efficient light absorbing device Figure 10 Light trap I...

Страница 32: ...ny 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 container with the little handle in the co...

Страница 33: ...computer for control of LTL2000S Q functions and for log data acquisition The computer or terminal connects to the Instrument using a communication cable fitted with a 9 pin male D Sub connector at on...

Страница 34: ...ceive 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...

Страница 35: ...SUB As it can be seen the interconnections have been held to an absolute minimum and in some rare situations there will have to be established additional connections on the PC side Please refer to you...

Страница 36: ...utomatic Off Timer 300 sec Ot 120 Automatic Off Timer 120 sec If for some reason the communication fails or the command is undefined the LTL2000S Q responds with a question mark If the parameter lies...

Страница 37: ...ent settings Y N Initialising Instrument Zero and Calibrate II Command Terminated Set Default values from ROM Execute initialisation Instrument not calibrated Cancel initialisation command without any...

Страница 38: ...Y N Cal Rl Rl Factor 2 032 Rl Normal 123 Query Rl Calc factor Calibrate Rl to 123 Y N response to start Calibrating Rl Calculated calc factor New active Rl normal REn None F T Rl On Rl Off Rl On Querr...

Страница 39: ...stat LWn Log warn T F OT Off timer PV PMTV QEn Qd T F QCn Cal to n REn Rl T F RCn Calc to n RZ zero M Measure SNn Seq TI hh mm ss TO Turn Off VA Bat alarm VB VBat VS V idle V lamp Help menu Query Set...

Страница 40: ...us Code 01000000 64 High Signal with Lamp on Error Status Code 10000000 128 High Signal with Lamp off Error Qd Status code interpretation bit pattern value Description Status Code 00000001 1 Error in...

Страница 41: ...r Note that one or more of the shown data can be left out depending on the selected operation mode If the status is other than 0 then there was a special condition detected during the measurement and...

Страница 42: ...tout 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 newest first if one o...

Страница 43: ...le of status printout The printout is done from the Menu system Date and time for printout Zero adjust data Rl calibration data Rl measurement data Qd Calibration data Qd measurement data Voltage meas...

Страница 44: ...ead horizontal 0 33 Illumination angular spread vertical 0 17 Field of measurement Width 45 mm Length typ 200 mm Min reading mcd m 2 lx 1 0 Max reading mcd m 2 lx 1 Typ 2000 Profile height up to 4 mm...

Страница 45: ...asurements Data retention from purchase Typ 5 years Serial communication mode 9600 N 8 1 Data flow control Xon Xoff Interface RS 232 Environmental Characteristics Temperature Operating 0 C to 45 C Sto...

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