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.

Certified Asbestos Abatement

Asbestos Abatement Certified Asbestos Abatement has been a very lucrative career for many people offering a steady form of income in a lot of different areas of employment. Asbestos is a natural mineral that is very fibrous, it's an excellent insulating material, but has been found to cause lung cancer and also mesothelioma if it has   read more..

Can A Private Homeowner Dispose Of Asbestos Floor

Material Properties Materials are either amorphous or crystalline. The difference between these two descriptions depends on the positions of the atoms in them. The atoms in amorphous materials are randomly arranged with no long range order Asbestos Abatement Can A Private Homeowner Dispose Of Asbestos Floor. An example of an amorphous material is glass.  read more..

How To Clean Up Raw Sewage In A Basement

Sanitary sewer overflows can be caused by too much precipitation infiltrating leaky sewer pipes, inadequate system capacity to handle newly-developed residential or commercial areas, blocked or broken pipes, or improperly designed and installed sewer systems. Sewage backups not only present unpleasa  read more..

Crime Trauma Scene Decontamination Training

CRIME SCENE WASTE A. If the crime has occurred on an Individual Parcel, the Police Department will advise the responsible party to contact a private cleanup company. Crime Scene Cleanup Crime Trauma Scene Decontamination Training The list of city approved cleanup firms may be provided upon request. 

If a police inc  read more..

I Got Water On The Carpet In My Basement

Recent instances of whole house deep energy retrofits for private clients could eventually yield case studies that will help researchers identify consumer preferences and cost-effective methods for exterior basement insulation. So far, however, Basement Drying I Got Water On The Carpet In My Basement the anecdotal  evidence gleaned from iso  read more..

Requirements For Workers Exposed To Lead

Requirements for Workers Exposed to Inorganic Lead Under the standard for inorganic lead in the construction industry, initial medical surveillance consisting of biological monitoring to include blood lead and ZPP level determination shall be provided to employees exposed to lead at or Lead Paint Removal Requirements For Workers Exposed To Lead abo  read more..

Mold Remediation

After there is a fire and the Fire Damage Mold Remediation building has become saturated with water, then the presence of mold has become a major area of concern related to health in our indoor environment. Molds can be an important part of the natural environment and they have been around since the beginning of tim  read more..

Wind Damage Insurance Roof Claim

DAMAGING WINDS What are damaging winds? Damaging winds are often called "straight-line” winds to differentiate the damage they cause from tornado damage. Strong thunderstorm winds can come from a number of different processes. Most thunderstorm winds that cause damage at the ground are a result o  read more..

How To Remove Black Mold From Shower Walls

Molds are microscopic organisms that live on plant or animal matter. They aid in the break down of dead material and recycle nutrients in the environment. Present virtually everywhere, they can be found growing on organic material such as soil, foods, and plant matter. In order to reproduce, mo  read more..

Water Damage House Foundation

Cold Weather Tips for Water PipesThursday, November 08, 2012Winter is just around the corner and with freezing temperatures comes the risk of frozen pipes. Here are some suggestions for protecting your home during extremely cold temperatures. Insulate exposed pipes or Water Damage Water Damage House Foundation faucets
  read more..