MIL-STD-1330D(SH) APPENDIX D
w/ Change 1
D.10.2.10 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 in data sheet 3. Place the dish back on the hot plate.
NOTE 12: If an error occurs while taking a reading, such as pressing the wrong key or dropping the dish, the reading can not be repeated. If this occurs, start over from D.10.2.2.
D.10.2.11 Repeat D.10.2.2 through D.10.2.10 until three data points (they do not have to be consecutive) are within the following acceptable range.
TABLE D-III. Acceptable range for 5 ppm acceptance criteria without baseline.
Solvent |
Acceptable Range: Maximum allowable difference between highest and lowest reading |
CFC-113 |
60 counts |
HCFC-225 |
50 counts |
HFE-7100 |
30 counts |
D.10.2.13 The average of the three acceptable data points shall be recorded in data sheet 3 as the Dish 5 ppm
Acceptance Criteria.
D.10.2.14 At the end of the day or when D.10.2.13 is completed, mark the solvent level on the laboratory standard.
D.10.3 5 ppm acceptance criteria with baseline.
D.10.3.1 Perform D.10.2 to determine the 5 ppm acceptance criteria for the dish for comparison to baseline. D.10.3.2 Turn the SQM control unit ON. After 15 seconds when the system boots up, set the mode to PEAK.
Allow 15 minutes to warm up. Check that the control unit gain setting is as specified in data sheet 2 for the dish
being used.
D.10.3.3 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 13: Do not touch the inside surface after cleaning and do not dry the inside surface with a towel or cloth. D.10.3.4 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.10.3.5 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 14: 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.10.3.6 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.10.3.7 After 3 minutes has elapsed, repeat D.10.3.5.
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