Electronic Restoration >> How To Clean Water Damaged Electronic Circuits

Crystals shall be swept synthetic quartz, meeting the infrared quality requirements of grade A or B of Synthetic Quartz Crystal  Specifications and Guide to the Use, IEC 60758 (1993-04), International Electrotechnical Commission, Geneva, Switzerland. Crystals shall be mounted with at least a three point mount; no parts shall be used that latch up in a Single Event Upset (SEU) environment; all active and passive parts shall be derated in accordance with the How To Clean Water Damaged Electronic Circuits guidelines of MIL-STD-975.6.1/ 

The IEC specification lists six levels of infrared quality, which are designated from Aa (the best) to E (the worst). A and B are the levels that several prominent oscillator manufacturers recommend for space How To Clean Water Damaged Electronic Circuits and military applications. Infrared quality is an indirect measure of the level of impurities in a crystal. 

Impurities can affect frequency aging characteristics.It is the responsibility of the user to specify detailed test conditions and define pass/fail criteria for each test. These values shall be based on the nearestequivalent military specifications, How To Clean Water Damaged Electronic Circuits the manufacturer’s specification, or the application, whichever is more severe. 

MIL-PRF-55310 is the referencespecification. See also Soldered Electrical Connections, NASA-STD-8739.3, December 1997.2/ Certification of soldering personnel is required.3/ In lieu of internal visual, How To Clean Water Damaged Electronic Circuits DPA shall be performed on five samples to the requirements of S-311-M-70. No failures are permitted.4/ 

Percent Defective Allowable (PDA) calculations shall include both burn-in and frequency aging failures for grade 1 parts.5/ Pure tin plating is prohibited as a final finish on EEE parts. Oscillator Supply Voltage Measure voltage magnitude, tolerance, polarity, regulation, peak to peak ripple, ripple frequency, and How To Clean Water Damaged Electronic Circuits noise across oscillator input terminals with specified load.

All Modulation—Control InputVoltageSame as 1 above, but also measure modulation magnitude and DC level limits or DC controlmagnitude.2, 5, 63. Oven Supply Voltage Same as 1 above, How To Clean Water Damaged Electronic Circuits but measure oven voltage etc. across input terminals of oven. 4, 64. Overvoltage Survivability Apply overvoltage 20% above maximum specified supply voltage for 1 minute, with no performancedegradation. 

Do not exceed 16.5 volts for oscillators employing CMOS parts.All5. Frequency Adjustment Stabilize at reference temperature and determine by frequency measurements that output signal can beset to either nominal frequency or How To Clean Water Damaged Electronic Circuits marked frequency offset with specified resolution and adjustedoven specified range.

Adjustable Initial Frequency—Temperature AccuracyStabilize at lowest specified temperature and measure frequency. Increase temperature in specifiedsteps (allowing stabilization) and How To Clean Water Damaged Electronic Circuits record frequency until highest specified temperature is reached.Calculate frequency-temperature accuracy in accordance with paragraph 4.8.10.

All Frequency—VoltageToleranceSet oscillator supply voltage (oven supply voltage, if applicable) to nominal, minimum, How To Clean Water Damaged Electronic Circuits and maximumvalues and measure output frequency. Determine frequency-voltage tolerance in accordance withparagraph 4.8.14.All8. Rise and Fall Times Measure between specified voltage levels. 

For TTL and CMOS compatible oscillators, the lowermeasurement level shall be 0.8 volts and 10% of signal level, How To Clean Water Damaged Electronic Circuits respectively. The upper measurementlevel shall be 2.0 volts and 90% of signal level respectively. Square Wave9. Duty Cycle Measure at 50% voltage level, referenced to ground, and express as percent of wave form period. 

The measurement level for TTL and CMOS compatible oscillators shall be 1.4 volts and 50% VDD,respectively.Square Wave10. Modulation—Control InputImpedanceApply modulation-control input voltage to input terminals through series resistance. Measure voltage across series resistor and input terminals How To Clean Water Damaged Electronic Circuits and calculate input impedance in accordance with paragraph4.8.30.2, 5, 611. 

Frequency Deviation Assemble test equipment in accordance with Figure 13 of MIL-PRF-55310, and measure (calculate)total deviation, deviation slope polarity, How To Clean Water Damaged Electronic Circuits and deviation linearity in accordance with paragraph 4.8.31.2, 5, 6Notes:1/ It is the responsibility of the user to specify detailed test conditions and define pass/fail criteria for each test. 

These values shall be based on the nearestequivalent military specifications, the manufacturer’s specification, or the application, whichever is most severe. MIL-PRF-55310 is the referencespecification. This section provides guidelines and recommendations for the selection, How To Clean Water Damaged Electronic Circuits test,qualification, and application of optical fiber, cable, connectors, and assemblies based oncharacterization and qualification results from the GSFC Code 562 

TechnologyValidation Assurance (TVA) Laboratory for Photonics. This laboratory provides design,development, How To Clean Water Damaged Electronic Circuits and validation test services to NASA projects that require optical fiberspace flight hardware. Recommendations concerning assembly and integration are basedon knowledge gained by the Advanced Photonic Interconnection Manufacturing (APIM)Laboratory of Code 562. 

APIM manufactures and installs space flight project opticalfiber assemblies for GSFC.Background information, selection criteria, and application notes for fibers, cables,connectors, How To Clean Water Damaged Electronic Circuits and fiber optic assemblies are provided on pages 1 to 8. Table 3 (page 10)provides a listing of all tests recommended for each of these part categories, as well aswhere these tests should be performed (by manufacturers, users, or both). 

Table 4 (page12) provides the recommended test procedures for each of the tests listed in Table 3.Refer to paragraph 6.0, Instructions, How To Clean Water Damaged Electronic Circuits pages 4 through 10, of Section 1 for general partrequirements applicable to all part types. Acrylates and polyamides have been used for flight grade optical fiber coatings since the1980s. 

Optical cable with acrylate coated fiber was qualified by GSFC during that periodand is the heritage design for space flight projects. Each fiber coating material has itsadvantages and How To Clean Water Damaged Electronic Circuits disadvantages. Acrylates can be selected for strippability (example: methylene chloride). They are alsofairly soft, yielding a more flexible fiber. 

Unfortunately, acrylates tend to have lowtemperature ratings (usually around 85 °C although some are available that are rated ashigh as 200 °C) and are known to outgas (i.e., TML ≥ 5%, CVCM greater than or How To Clean Water Damaged Electronic Circuits equalto 0.5%). Unjacketed acrylate coated fiber can cause contamination when it is used nearother optical surfaces. 

Acrylate coated fiber is not a problem when used in a cableassembly because terminated cable does not allow sufficient venting to occur. Polyamides have the advantage of a 125 °C temperature rating. This is critical toprograms such as the Space Station and How To Clean Water Damaged Electronic Circuits some deep space applications. 

Polyamides tendto make fiber stiffer than acrylates do. Silicone and Gore-Tex®applied as a secondcoating have been used to improve How To Clean Water Damaged Electronic Circuits the flexibility of polyamide coated fiber. Silicone hasthe disadvantage of introducing a contamination concern.

Mold Mitigation Remediation

Testing is usually done to compare the levels and types of mold spores found inside the building with those found outside of the building or for comparison with another location in the building. In addition, Mold Remediation Mold Mitigation Remediation air sampling may provide tangible evidence supporting a hypothesis that inves  read more..

Remove Radon From A House

Currently, the Proficiency Program does not provide proficiency determinations for participants that measure for radon in soil or water. Therefore, only devices that are determined to be appropriate for the measurement of radon or radon decay products in indoor air and individuals measuring or   read more..

Lead Paint Testing For Paint Contractors

Educate small painting and remodeling contractors about lead-safe work practices to protect the health of occupants (especially small children) and employees. From 1996 to 2000, 34 half-day lead awareness trainings were held throughout California to increase contractors' use Lead Paint Removal Lead Paint Testing For Paint Contractors of lead-s  read more..

How To Restore Water Damaged Photos

At this point, a conservator may make general suggestions about different treatment approaches and techniques that might be suitable for your items. However, do not expect the conservator to offer concrete treatment proposals or Document restoration How To Restore Water Damaged Photos cost estimates unti  read more..

Remove Lead Paint From Your Business

Employers shall institute a medical surveillance program for all employees who are or may be exposed at or above the action level for more than 30 days per year. (B) The employer shall assure that all medical examinations and procedures are performed by or under the Lead Paint Removal Remove Lead Paint From Your Business supervision of a l  read more..

How To Dehumidify A Bathroom Without Losing Heat

Fans shall be Class II (minimum) construction with single inlet, aluminum wheel and stamped air-foil aluminum blades. The fan wheel shall be mounted on the directly-driven motor shaft in AMCA Arrangement 4. G. Filter Section: Pleated, Dehumidification How To Dehumidify A Bathroom Without Losing Heat disposable pre-filters in outdoor-air inlets suppl  read more..

Sewage Backup

There is nothing worse than to come home and find out that there's a Basement Drying Sewage Backup, when he left the house you started a load of laundry, now when you returned, you found out that your main sewer line is backed up and all the water that came from your washing machine flooded your basement. Not only is   read more..

Lead Paint Removal Poisoning

Where the employer does establish that the employee is exposed to levels of lead below 2,500 µg/m3, the employer may provide the exposed employee with the appropriate respirator prescribed for use at such lower exposures, in accordance with Table I of this section. Interim protection as described i  read more..

Health Effects Caused By Lead Poisoning

Health effects caused by lead exposure can be subdivided into five developmental stages: Normal, physiological changes of uncertain significance, pathophysiological changes, overt symptoms (morbidity), and mortality. Within this process there are no sharp distinctions, butrather a continuum [ME  read more..

Mold Inside The Wall From A Plumbing Leak

By The Post-Standard Syracuse, NY -- The daily doses of rain that have fallen on Central New York this spring may have some Syracuse area residents ready to call Noah for a reservation. The region has received at least a trace of rain every day since April 16. Since then, Mold Remediation Mold Inside The Wall From A Plumbing Leak about 8 inch  read more..