MIL-STD-1330D(SH) APPENDIX D
w/ Change 1
D.10.2.2 Using Sparkleen cleaning solution (D.6.2(a)) in a container (D.5.1(i)), THOROUGHLY clean the evaporating dish by scrubbing by hand using a paper towel (D.5.1(h)) for about one minute. Rinse THOROUGHLY, for about 20 to 30 seconds, under running tap water. Shake off excess water.
NOTE 6: Do not touch the inside surface after cleaning and do not dry the inside surface with a towel or cloth. D.10.2.3 Using the washing bottle (D.5.1(d)) filled with CFC-113, HCFC-225, or HFE-7100, tilt the dish and
spray it with solvent to displace the water droplets off of the dish, particularly from the flat area at the bottom of the
evaporating area. Droplets remaining near the top edge are acceptable. The solvent shall be directed into a "solvent waste" container.
D.10.2.4 Place the dish on a hot plate set per D.8.1.1. Keep the dish on the hot plate until no solvent or water droplets remain on the surfaces where evaporation occurs. On the flat top edge and bottom, any residual water can be wiped with clean cloth.
NOTE 7: Accomplish the following actions as quickly as possible to minimize the time the dish is exposed to the UV light. Since the monitor is not sensitive to the temperatures specified in this procedure, there is no need to allow the dish to cool before taking a reading.
D.10.2.5 Slide the dish under the SQM sensor. Place the sensor directly on the top edge of the dish. Align the dish so that the outside of the dish aligns with the outside of the sensor. Press the ENTER key on the SQM and observe the reading. Remove the dish. Log the reading on data sheet 3. Place the dish back on the hot plate.
D.10.2.6 After 3 minutes has elapsed, repeat D.10.2.5.
D.10.2.7 Check that the dish baseline cleanliness (reading #2) is within 100 counts of the baseline cleanliness acceptance criteria recorded in data sheet 3 for the specific dish being used for the analysis. Readings outside this range indicate a problem with dish cleanliness. Repeat steps D.10.2.2 through D.10.2.6 to check dish cleanliness.
NOTE 8: The solvent used for preparing the laboratory standard needs to be the same as the cleaning solvent
(i.e., if HFE-7100 will be used as the cleaning solvent, then HFE-7100 must be used to prepare the standard).
NOTE 9: Never transfer calibration standard from the laboratory standard to the dish using the pipet to prevent contamination of the standard.
NOTE 10: If the standard inadvertently reaches the dispenser, the dispenser will contaminate the contents of the pipet. If this occurs, dump the contents of the pipet into the waste solvent storage flask and fill the pipet several times above the 0.5 mL mark with unused solvent to clean the pipet.
WARNING 2: Thermal decomposition of solvent can cause harmful vapors. As a check, feel the hot plate with bare hand to confirm it is only "warm to the touch" prior to evaporating solvent in the dish. If it is hot, determine
the cause and correct the problem before proceeding.
D.10.2.8 For the standard prepared in D.9, if it is used for the first time that day, confirm that the solvent level is at the last mark on the standard. If it is not, obtain another standard. Shake the standard vigorously for no less than 15 seconds. Remove the cap from the laboratory standard. Pour approximately 2 to 3 mL of the laboratory standard into the 10 mL beaker. Immediately replace the cap on the standard to minimize evaporative losses. Fill the pipet with 0.5 mL of solution by rotating the filler/dispenser knob. With the dish on the hot plate, transfer this
0.5 mL of solution to the evaporating dish by rotating the knob in the opposite direction. Allow the solvent to completely evaporate.
D.10.2.9 Repeat D.10.2.8 for a total of 3 doses (1.5 mL total) for other than instruments, or 3 doses (1.5 mL
total) for instruments. Clean the beaker and pipet by rinsing with unused solvent.
NOTE 11: Accomplish the following actions as quickly as possible to minimize the time the dish is exposed to the UV light. Since the monitor is not sensitive to temperatures specified in this procedure, there is no need to allow the dish to cool before taking a reading.
69
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business