A precision voltage reference unit for calibrating airborne data acquisition systems
Abstract
A precision voltage reference unit is described which enables the accuracy and precision of flight data acquisition systems to be measured under operational conditions. Two versions were designed having outputs of 8 mV and 4 V which simulate 80% of the full scale output respectively, of low level (10 mV) and high level (5 V) transducer outputs, and a range of source impedances is also simulated. The voltage stability of the units is better than 0.01% for the high level version and 0.1% for the low level version, over the temperature range -40 to +80 C. The design is such that the magnitude of a number of error sources (e.g. common mode voltages, system input impedances, and offset voltages and currents) can be determined.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1976
- Bibcode:
- 1976STIN...7732474T
- Keywords:
-
- Calibrating;
- Flight Test Instruments;
- Standards;
- Voltage Regulators;
- Aircraft Instruments;
- Data Acquisition;
- Digital Data;
- Instrumentation and Photography