DLS VERIFICATION TESTING

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DLS VERIFICATION TESTING

• FIELD TESTS
• TO
• CHECK DLS OPERATIONS

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DATA LOGGER SYSTEMS

• Data LOGGER SYSTEMS (DLS) ARE ELECTRONIC SYSTEMS
  USED TO
• 1. MONITOR MATERIAL APPLICATION CONDITIONS
• i.e. ambient temperatures
• 2. PROVIDE REAL-TIME DATA OF ACTUAL
  APPLICATION PARAMETERS
• i.e. pounds of glass beads put down
• 3. ALLOWS STRIPERS TO MAINTAIN APPLICATION
• RATES

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STRIPING TRUCK WITH DLS SYSTEM
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ELECTRONIC CONTROL BOX
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OHIO DOT DLS INFORMATION

• THE OHIO DOT DLS TECHNICAL GUIDE CAN BE FOUND
  AT
• O\TRAFFIC\Markings Summits\Markings Summit
  2007\Markings Summit Districts
• THE OHIO DOT DLS TECHNICAL GUIDE CONTAINS
  INFORMATION
• THAT INCLUDES
• 1. EXAMPLES OF DLS DATA REPORT FORMS
• 2. HOW DATA IS ENTERED INTO A DLS REPORT
• 3. HOW TO READ A DLS REPORT
• 4. DLS REPORT SECURITY

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SENSORS

• SENSORS SUCH AS TEMPERATURE SENSORS, LOCATED AT
  APPROPRIATE LOCATIONS ON THE STRIPING TRUCK,
  PROVIDE TEMPERATURE DATA.

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GAUGES

• GAUGES PROVIDE DATA AND HELP MONITOR THE
  TEMPERATURE OF STRIPING MATERIAL IN THE TANKS.

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GLASS BEAD TANK LOAD CELLS

• GLASS BEAD TANKS ARE MOUNTED ON LOAD CELLS. LOAD
  CELLS ARE THE BASIS OF BEAD WEIGHT CALCULATIONS.

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DLS ELECTRONIC DATA SHEET

• 1. DLS DATA IS AUTOMATICALLY RECORDED AND
  STORED ELECTRONICALLY
• 2. DLS DATA INCLUDES
• SENSOR DATA
• DISTANCE DATA
• AMBIENT CONDITIONS
• MATERIAL QUANTITIES
• 3. VERIFICATION TEST RESULTS WILL BE COMPARED TO
  CONTRACTORS ELECTRONIC SHEET DATA

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FIELD CHECKING A DLS SYSTEMCalibration Sticker
Check

• 1. CHECK FOR THE PRESENCE OF
• THE ANNUAL CALIBRATION STICKER

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CALIBRATION STICKER

• EVIDENCE OF ANNUAL CALIBRATION SHALL BE A SIGNED
  AND
• AFFIXED TO THE INSIDE OF THE DRIVERS DOOR OF
  EACH
• STRIPING TRUCK.

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YEARLY CALIBRATION

• 1. ACCORDING TO THE OHIO DOT CONSTRUCTION AND
• MATERIAL SPECIFICATION MANUAL, ITEM 641, SECTION
• 641.03, EACH DLS SHALL HAVE AN ANNUAL
  CALABRATION.
• 2. ITEMS TO BE CALIBRATED INCLUDE
• -ALL MECHANICAL AND ELECTRICAL COMPONENTS
• -SOFTWARE
• -FUNCTION AND OUTPUT
• 3. CALIBRATION WILL BE CONFIRMED BY MANUFACTURER.
  

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Field Checking a DLS SystemThe Plate Test

• Place an aluminum plate around 24 in. x 8 in.
  under the paint gun of the striping truck.
  Aluminum plates are supplied through the Office
  of Materials Management (OMM), Chemical Section.
• Allow the striping truck to stripe over the plate
  in order to get a stripe of the desired
  thickness on the plate.
• Send the striped plate to the OMM , Chemical
  Section for film thickness testing.
• Send the contractors DLS average mils applied
  data as comparison for the film thickness testing
  results.
• Note Be careful not to damage the
• paint stripe on the plate.

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Field Checking a DLS SystemThe Plate Test
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Field Checking a DLS SystemThe Bead Weight Test

• Check and record the bead weight on the DLS
  electronic data sheet W1.
• 2. Obtain an object of known weight, minimum
  of twenty (20) pounds, i.e. a fifty pound bag
  of glass beads.
• 3. Place the weight on top of the
• bead tank. Keep the weight in position
  on top of the tank and check and record the new
  weight W2, on the DLS electronic data sheet.
• Subtract W1 from W2 to get the known weight of
  the object used.
• W2 W1 weight of the object of known
  weight used.
• Correct test results confirms the
• proper operation of the bead tank
• load cells as well as the accuracy of
• the data on the spreadsheet.

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Field Checking a DLS SystemThe Bead Weight Test
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Field Checking a DLS SystemThe Infrared
Thermometer Test

1. Use a hand-held Infrared Thermometer to measure
   road surface temperature, ambient temperature,
   and/or striping material temperature.
2. To operate the infrared thermometer, follow the
   manufacturers operating procedures.
3. Compare temperature readings to the data on the
   appropriate DLS electronic screen.
4. Temperature readings on the DLS screen should be
   within /- 5 of the thermometer readings.

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Field Checking a DLS SystemThe Infrared
Thermometer Test
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Field Checking a DLS SystemThe Humidity Test

• Measure the ambient humidity with the use of a
  Sling Hydrometer.
• To operate the sling hydrometer, follow the
  manufacturers operating procedures.
• Compare humidity readings to the data on the
  appropriate DLS electronic screen.
• Humidity readings on the DLS screen should be
  within /- 5 of the hydrometer readings.

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Field Checking a DLS SystemThe Humidity Test
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Field Checking a DLS SystemThe Distance Traveled
Test

• Testing the Distance Traveled data on the DLS
  Electronic Data Screen can be done using a
  distance wheel like the one shown in the picture.
• To operate the distance wheel, follow the
  manufacturers operating procedures.
• Compare distance readings to the data on the
  appropriate DLS electronic screen.
• Distance readings on the DLS screen should be
  within /- 5 of the distance wheel readings.
• DLS distance data can also be checked using mile
  markers and an odometer.

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Field Checking a DLS SystemThe Distance Traveled
Test
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SUMMARY

• THE SPECIFIED ANNUAL CALIBRATION OF DATA LOGGER
  SYSTEMS (DLS) IS THE PRIMARY CHECK OF THE
  OPERATION OF THE SYSTEMS.
• THE TESTS DESCRIBED IN THIS PRESENTATION ARE
  MEANT TO BE DONE IN A RANDOM FASHION TO
• 1. VERIFY PROPER OPERATION AFTER
  CALIBRATION
• 2. DETERMINE IF THE SYSTEM IS THE CAUSE OF
  SUSPICIOUS
• DEVELOPMENTS IN THE FIELD APPLICATION
  OF STRIPING MATERIAL
• ONE OR ALL OF THE TESTS MAY BE USED TO CHECK DLS
  OPERATION
• THE DEVELOPMENT AND IMPLEMENTION OF THESE TESTS
  WILL BE DONE IN COOPERATION BETWEEN THE
  DISTRICTS AND THE OFFICE OF MATERIALS MANAGEMENT,
  CHEMICAL SECTION.
• CONTACT MARIA KERESTLY/RANDY DAVIS 614-275-1349