FABRICATION MANUAL. D-42 MICROPOTENTIOMETER RESISTOR TEST FIXTURE.
Abstract
The drawing number control sheet, parts and assembly list, and drawings are presented for the micropotentiometer resistor test fixture D-42. The test fixture is designed to test the resistance of the output resistors used in the D-39 Micropotentiometer. Some of these resis tors are as low in value as one milliohm. It is necessary to test these as 'four terminal' re sistors in order to know that the value of output voltage as indicated by the D-39 is accurate. In operation, a resistor is placed in the re ceptable of the D-42, and an accurately known current is passed through the two terminals mounted on the chassis. The terminals on the contact support are adjusted to bear firmly on the center contact solder ring of the resistor and upon the outer contact ring. The voltage appearing at the two elevated terminals may now be divided by the current previously introduced. The resulting quotient is the resistance of the output resistor as seen at the two contact solder rings. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 08, 1963
- Accession Number
- AD0418530