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Investigation of factors affecting the heater wire method of calibrating fine wire thermocouples
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Keshock, E. G. |
| Copyright Year | 1972 |
| Description | An analytical investigation was made of a transient method of calibrating fine wire thermocouples. The system consisted of a 10 mil diameter standard thermocouple (Pt, Pt-13% Rh) and an 0.8 mil diameter chromel-alumel thermocouple attached to a 20 mil diameter electrically heated platinum wire. The calibration procedure consisted of electrically heating the wire to approximately 2500 F within about a seven-second period in an environment approximating atmospheric conditions at 120,000 feet. Rapid periodic readout of the standard and fine wire thermocouple signals permitted a comparison of the two temperature indications. An analysis was performed which indicated that the temperature distortion at the heater wire produced by the thermocouple junctions appears to be of negligible magnitude. Consequently, the calibration technique appears to be basically sound, although several practical changes which appear desirable are presented and discussed. Additional investigation is warranted to evaluate radiation effects and transient response characteristics. |
| File Size | 1667943 |
| Page Count | 59 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19720012736 |
| Archival Resource Key | ark:/13960/t3kx05g0j |
| Language | English |
| Publisher Date | 1972-01-01 |
| Access Restriction | Open |
| Subject Keyword | Transient Response Radiation Effects Heating Platinum Calibrating Thermocouples Wire Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
