A TRANSISTORIZED SIX-CHANNEL AIRBORNE STRAIN GAGE CALIBRATOR AND EXCITATION UNIT
The device consists of two subassemblies: the Excitation Unit and the Calibrator Unit. The Excitation Unit provides six independent sources of regulated d-c power from a single source of 28 volts d-c. The capacity oi each source is nominally 1 watt providing either 10.5 or 20.5 volts excitation for bonded or unbonded straln gages. The Excitatton Unit comprises a transistor series voltage regulator which controls the input to a transistor magnetic flip- flop power supply. The Calibrator Unit consists of a Ledex switch which connects strain-simulating resistors across the appropriate arms of the strain gage bridge. The values of these resistors are calculated to simulate precise values of strain or acceleration and provide an accurate scale factor on the final telemetered record. The Ledex rotary switch has three double decks for calibrating six channels of strain and one deck for voltage increments from zero to plus three volts for calibration of voltage controlled subcarrier oscillators. (auth)
- Research Organization:
- Sandia Corp., Albuquerque, N. Mex.
- NSA Number:
- NSA-14-004439
- OSTI ID:
- 4222441
- Report Number(s):
- SCR-128
- Country of Publication:
- United States
- Language:
- English
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