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.

How To Get The Water Out Of My Basement

Relocation – moving your house out of the flood hazard area – offers the greatest protection from flooding. It also can free you from anxiety about future floods and lower or even eliminate your insurance premiums. However, Basement Drying How To Get The Water Out Of My Basement relocation usually is the most expensive of the retrofittin  read more..

Mold Removal

Mold usually grows in extremely damp and humid areas such as basements and bathrooms. Mold Remediation Mold Removal from the caulking around your bathtub or shower is very common problem. First, there are different kinds of caulking, the caulking needs to be a mold and mildew resistant type and there's no way to know  read more..

Information About Lead In The Workplace Californ

Information About Lead in the Workplace Occupational Lead Poisoning Prevention Program (OLPPP) Occupational Health Branch, California Department of Public Health (CDPH) OLPPP provides information on lead in the workplace as well as educational and training materials for workers, employers and [  read more..

How To Repair And Restore Fire And Water Damage

California Governor Arnold Schwarzenegger's recent approval of a bill mandating the use of cigarettes that are much less likely to cause fires will save lives in that state and Fire Damage How To Repair And Restore Fire And Water Damage could lead to nationwide use of such "fire-safe" cigarettes. 

Last Friday,   read more..

Work Related Lead Testing

For industrial workers, What can I do to protect myself? Make sure you don't accidentally swallow lead. Wash your hands and face with soap and water before eating or drinking and before leaving work. Do not eat, drink, or smoke in the work area. Take a shower Lead Paint Removal Work Related Lead Testing and wash your hair as soo  read more..

Dealing With Frozen Pipes

Keep open cabinet doors leading to exposed pipes (such as access doors for sinks), so that household air can warm them.The natural flow of warmer air will help combat many problems.If you have an attached garage, keep its doors shut.Occasionally, plumbing is routed through this unheated space, Water Damage Dealing With Frozen Pipes&  read more..

How To Remove Smoke Damage From Mirrors And Glass

During this process they will ingest the soot and Smoke Damage How To Remove Smoke Damage From Mirrors And Glass other byproducts of the fire which maybe quite harmful. A cat that has been in a fire should be carefully and thoroughly shampooed in lukewarm water with a mild baby shampoo. You may do this yourself but many pet owners find it less st  read more..

Asbestos Abatement Services

The project dates must be consistent with the contract documents, but must also reflect the actual dates that the contractor anticipates being on site. For example, if the contract requires that the work be conducted in June but the work will require only one week for completion, the notification mu  read more..

Flood Does Bleach Kill Mold

Basement Flood - Does Bleach Kill Mold Should I test for mold? Mold testing can be expensive and time consuming, and it usually requires special equipment and trained technicians to obtain reliable results. But most importantly, you probably will not get the results from your mold test for a couple   read more..

Basement Drying

Water extraction, Basement Drying


Places that are often or always damp can be hard to maintain completely free of mold. If there's some mold in the shower or elsewhere in the bathroom that seems to reappear, increasing ventilation (running a fan or opening a win  read more..