FORD FLTM BI 010-3-2001 MEASUREMENT OF DISTINCTNESS OF IMAGE OF PAINTED SURFACES.pdf

1、 FORD LABORATORY TEST METHOD BI 010-03 Date Action Revisions 2001 03 13 Revised Editorial no technical change A. Cockman 1992 06 17 Printed copies are uncontrolled Page 1 of 6 Copyright 2001, Ford Global Technologies, Inc. MEASUREMENT OF DISTINCTNESS OF IMAGE OF PAINTED SURFACES Application This pro

2、cedure is used for measuring the distinctness of image (D.I) of painted surfaces with a beam of incident light at an angle of 30 +/- 3. Apparatus Required Dorigon Glossmeter D47R-6F Dorigon meter (optical sensor and signal processor. Source: Hunter Associates Laboratory Inc. Fairfax, Virginia (703)

3、471-6870 Primary Standards A highly polished, plane, black glass surface with an assigned D.I. value. Source: Hunter Associates Laboratory Inc. Secondary Standard A semi-gloss ceramic tile with an assigned D.I. value. Source: Hunter Associates Laboratory Inc. Note: Refer to General Information Secti

4、on for details regarding maintenance of the equipment and standards. Materials Required Soap Neutral, liquid soap. Deionized or Distilled Water 10 ppm max dissolved solids (ASTM D 1888). FORD LABORATORY TEST METHOD BI 010-03 Page 2 of 6 Copyright 2001, Ford Global Technologies, Inc. Panels As specif

5、ied in FLTM BI 103-02 (for spray systems) or BI 120-01 (for electrocoat systems) or as indicated in the applicable engineering specification. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % re

6、lative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Procedure Sample Preparation 1. Prepare paint panels per FLTM BI 103-02 or BI 120-01 or as indicated in the applicable engineering specification. 2. Wash the panels (if soiled) wi

7、th neutral liquid soap and water, rinse with deionized or distilled water and blow off with air. Standardization 1. Release the standby button and allow meter to warm up for 15 minutes. 2. Screw the three alignment posts into the port collar. 3. Place the optical sensor in cradle, with specimen port

8、 facing upward. 4. Place the primary standard on the specimen port with the beam directional arrows in the same direction. 5. Press the RS button on the signal processor (all other buttons must be in the released position). 6. Using the adjustment knob on the optical sensor, adjust until the digital

9、 readout shows the maximum RS reading. 7. Use the standardize control knob on the processor to adjust the digital display in order to read the calibrated RS value of the primary standard. 8. Press the D.I. button. If the value displayed is not within +/- 1.0 of the assigned D.I. value, refer to Atta

10、chment A. 9. Place the secondary standard on the specimen port and press the RS button. FORD LABORATORY TEST METHOD BI 010-03 Page 3 of 6 Copyright 2001, Ford Global Technologies, Inc. 10. Adjust for maximum reading on the digital display by means of the adjustment knob on the end of the optical sen

11、sor. If this value is not within +/- 2.0 of the calibrated RS value of the secondary standard, refer to Attachment A. Note: Position and cleanliness of this standard is critical. 11. Press the D.I. button. If the value displayed is not within +/- 3.0 of the calibrated D.I. of the secondary standard,

12、 refer to Attachment A. Measuring D.I. - Test Panels 1. Place the top of the test panel on the specimen port against the alignment posts. 2. Press the D.I. button. 3. Adjust for the maximum positive display reading by means of the knob at the end of the optical sensor. 4. Read the D.I. value on the

13、display and record. 5. Place the bottom of the test panel on the specimen port and repeat steps 1 through 4. 6. The D.I. for the panel shall be the average of the readings from the top and bottom of the test panel. Measuring D.I. - Vehicles 1. Remove the alignment posts from the optical sensor viewi

14、ng port. 2. Place the optical sensor on the vehicle. The arrow on the optical sensor must be pointed to the front of the vehicle. Note: . When measuring the hood, locate the optical sensor approximately 300 mm from the cowl and 300 mm outboard of the center line. Measure the right and left side, ave

15、rage the readings and record individual and averaged values. . When measuring the deck lid, locate the optical sensor approximately 300 mm from the backlight and 300 mm outboard of the center line. Measure the right and left side, average the readings and record individual and averaged values. . Whe

16、n measuring the roof, locate the optical sensor approximately 300 mm forward of the front edge of the roof and 300 mm outboard of the center line. Measure the right and left side, average the readings and record individual and averaged values. FORD LABORATORY TEST METHOD BI 010-03 Page 4 of 6 Copyri

17、ght 2001, Ford Global Technologies, Inc. 3. Press the D.I. button. 4. Adjust for the maximum positive display reading by means of the knob at the end of the optical sensor and record. 5. Repeat step number 2 - 4 for the opposite side (of hood, deck lid or roof as applicable). General Information Ins

18、trumentation 1. The instrument should be cleaned regularly internally and externally. 2. It is best to keep the standby button engaged when the instrument is not in use in order to improve stability of the instrument, decrease the warm-up period necessary before beginning measurements and extend lam

19、p life. Standards 1. Store primary standard in a clean envelope. Wash with soap and water and dry with a soft cloth. Do not scratch. 2. Store secondary standard in a clean envelope. Wash with soap and warm water, rinse thoroughly and allow to air dry. Obtain a new standard if questionable readings a

20、re obtained. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BI 010-03 Page 5 of 6 Copyright 2001, Ford Global Technologies, Inc.

21、 MEASUREMENT OF DISTINCTNESS OF IMAGE OF PAINTED SURFACES ATTACHMENT A Optical Sensor Calibration NOTE: The instrument is factory calibrated and no significant change in calibration should occur after it leaves the factory. Consequently, if a problem arises when standardizing, exhaust all other poss

22、ibilities for standardizing the instrument (e.g. cleaning, focusing) before attempting any of the following calibration adjustments. These adjustments should be done only by a qualified technician. Service is available from: Central Laboratory Services Electronics Section 15000 Century Drive Dearbor

23、n, MI 48121 1. Set the standardize control knob to its full counterclockwise position. 2. Turn the knob five complete turns in the clockwise direction. (The instrument will then be at the center of its range. 3. Place the optical sensor in the cradle. 4. Put the zero black box supplied with the stan

24、dards over the specimen port. 5. Depress the CAL and RS buttons. 6. Using a small screwdriver, adjust the RS zero trimpot through the access hole in the optical sensor until the display reads “+ 0.00“. 7. Depress the CAL and D.I buttons and adjust the D.I zero trimpot on the optical sensor until the

25、 display reads “0.00“. 8. Depress the CAL and R2 buttons and adjust the 2 zero trimpot on the optical sensor until the display reads “+0.00“. 9. Place the primary standard on the specimen port. 10. Observe the arrow pointer positions on the standard level. 11. Depress the RS button (all other button

26、s in released position) and adjust for maximum reading on the display by using the adjustment knob at the end of the optical sensor. FORD LABORATORY TEST METHOD BI 010-03 Page 6 of 6 Copyright 2001, Ford Global Technologies, Inc. 12. Adjust the RS top scale trimpot through the access hole in the opt

27、ical sensor until the readout displays the RS value of the primary standard. 13. Place the secondary standard on the specimen port. 14. Depress the CAL and RS buttons and record the value displayed on the readout. 15. Depress the CAL and D.I buttons and adjust the D.I top scale trimpot in the optica

28、l sensor until the readout displays the exact value which was recorded in the previous step. 16. Depress the CAL and R2 buttons and adjust the 2 top scale trimpot in the optical sensor until the readout displays the same value as in the previous step. (Note: The readout has now shifted one position

29、to the left and the last digit on the right should be zero. 17. Repeat this complete procedure (except for setting the standardize control knob to center of its range) if substantial adjustment has been made. Note: For additional information, refer to Hunterlab Instruction Manual for the Model D47R-6F Dorigon Glossmeter.