Abstract: A method of manufacturing a sealed circuit card assembly includes disposing a circuit card assembly within a volume defined by a housing and at least partially filling the volume with a curable liquid such that the curable liquid encapsulates at least a circuit card. The method may also include curing the curable liquid to form a potted circuit card assembly and, after at least partially filling the volume with the curable liquid and after curing the curable liquid, vacuum impregnating the potted circuit card assembly with a sealant to seal any exposed interfaces or cracks to form the sealed circuit card assembly. Accordingly, the sealed circuit card assembly may include a first cured material encapsulating the circuit card of the circuit card assembly and a second cured material disposed within, for example, a porosity of the first cured material.

Abstract: A method of manufacturing a sealed circuit card assembly includes disposing a circuit card assembly within a volume defined by a housing and at least partially filling the volume with a curable liquid such that the curable liquid encapsulates at least a circuit card. The method may also include curing the curable liquid to form a potted circuit card assembly and, after at least partially filling the volume with the curable liquid and after curing the curable liquid, vacuum impregnating the potted circuit card assembly with a sealant to seal any exposed interfaces or cracks to form the sealed circuit card assembly. Accordingly, the sealed circuit card assembly may include a first cured material encapsulating the circuit card of the circuit card assembly and a second cured material disposed within, for example, a porosity of the first cured material.

Abstract: A method of manufacturing a sealed circuit card assembly includes disposing a circuit card assembly within a volume defined by a housing and at least partially filling the volume with a curable liquid such that the curable liquid encapsulates at least a circuit card. The method may also include curing the curable liquid to form a potted circuit card assembly and, after at least partially filling the volume with the curable liquid and after curing the curable liquid, vacuum impregnating the potted circuit card assembly with a sealant to seal any exposed interfaces or cracks to form the sealed circuit card assembly. Accordingly, the sealed circuit card assembly may include a first cured material encapsulating the circuit card of the circuit card assembly and a second cured material disposed within, for example, a porosity of the first cured material.

Abstract: An apparatus for rapidly conditioning wax samples and a method for determining the oil content of said samples with a nuclear magnetic resonance analyzer are described. A molten wax sample is collected in a sample holder. The holder is then placed in a temperature equilibration chamber where the molten wax is rapidly cooled at a temperature of about 25-33.degree.F with a cold gas stream from a vortex tube. The sample is then heated to a pre-selected equilibration temperature for a preset time at which point the sample is removed from the equilibration chamber. The sample is placed in the analyzer where the nuclear magnetic resonance value of the sample is determined. The sample is removed from the analyzer and weighed. Finally the oil content of the wax sample is obtained from a previously developed correlation between the oil content and the nuclear magnetic resonance value of various wax samples.

Abstract: An apparatus for rapidly conditioning wax samples and a method for determining the oil content of said samples with a nuclear magnetic resonance analyzer are described. A molten wax sample is collected in a sample holder. The holder is then placed in a temperature equilibration chamber where the molten wax is rapidly cooled at a temperature of about 25.degree.-33.degree.F with a cold gas stream from a vortex tube. The sample is then heated to a pre-selected equilibration temperature for a preset time at which point the sample is removed from the equilibration chamber. The sample is placed in the analyzer where the nuclear magnetic resonance value of the sample is determined. The sample is removed from the analyzer and weighed. Finally the oil content of the wax sample is obtained from a previously developed correlation between the oil content and the nuclear magnetic resonance value of various wax samples.