Gamma Radiation Exposure
Two PotCon ™ Sealed Connectors were exposed to gamma radiation at a rate of 1.5 x 10 R/Hour and helium leak tested after doses of 100 m rad. Leak rates after this test were less than 4.3 x 10 cc/sec and all pin-pin resistance was greater than 10 ohms. Tests were performed on compound 1469/1481 (AECL 29-63174-300-000).
Feedthrough Flammability Tests
Potting flammability test on three harness feedthroughs with two #12 AWG wires. Ultimate current applied 175a in air and 145a in 100% oxygen. No flame was noted throughout and the feedthrough test was concluded after conductor fusion. Feedthrough tests were performed on compound 1469/1481 (WSTF #79-11713).
Upward flammability tests also in air and 100% oxygen exposure resulted in a self-extinguished report. Feedthroughs tests were performed on compound 1469/1481 (WSTF #79-1173).
A UL ® flammability test was performed on compounds 1469/1470, 1469/1481, 7113/1470 and 7113/1481. All achieved a 94HB classification. (E92366, 84ME10295)
Water Vapor Transmission
Three samples of 1469/1481 epoxy at 0.125" thickness was tested per ASTM-E-96-80. The average for the feedthroughs tests was 7e-5 gms/day/cm.
Feedthrough Outgassing Tests
Samples of the materials were heated in a 10 Torr vacuum to 125° C. The chamber was pumped through, and the flow during the test was passed over and optical glass condensing surface at 25° C the results are detailed:
Compound |
%Wt Loss |
% VCM |
Visible Deposits |
1469/1470 |
0.33% |
<0.002% |
None |
1469/1481 |
0.22% |
<0.002% |
None |
Feedthrough Explosion Proof Testing
The following tests were performed by ULŪ labs on lead wires sealed in a fitting
using compound 26987, with the results indicated:
Leakage of Sealing Fitting test: Passed < 0.007ft
Hydrostatic Pressure Test: Passed 6.000 psi
Accelerated Air Oven Aging: Passed 168h @ +70° C.
Solvent Vapor Resistance Test: Passed 13 chemical vapor exposure tests.
We will participate willingly in the testing of samples of other designs.
Leachable Cations and Anions
A sample of our 1469/1481 epoxy 150 C and 100% RH was analyzed for leachable cations and anions:
| Cations (ug/g) |
Anions (ug/g |
| AI |
0.40 |
F |
<0.1 |
| Ca |
0.27 |
CI |
2.4 |
| Li |
0.03 |
NO3 |
<0.2 |
| Mg |
0.024 |
SO4 |
<0.2 |
| Na |
6.3 |
Br |
<0.2 |
| K |
0.016 |
NO2 |
<0.1 |
| Cu |
0.026 |
HPO4 |
<0.2 |
| Zn |
0.045 |
|
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