METHODS FOR LOW POWER TEMPERATURE CONTROL.

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Abstract:

The methods and devices by which the temperature of a single quartz crystal blank can be maintained at a constant operating temperature in extreme environmental conditions have been investigated. Four types of ovens, in which temperatures are controlled by a snap-action thermostat, were studied 1 a 500-milliwatt oven Type E6 requiring accessibility to the crystal and operating at 75C 2.5C over a -40C to 60C ambient 2 a 50-milliwatt sealed oven Type F6G with similar operating requirements 3 a less costly, 100-milliwatt sealed oven Type G6G with similar operating requirements and 4 a 250-milliwatt oven Type H6 requiring accessibility to a temperature-compensated crystal and operating at 0C3C over an ambient range from -55C to 0C. Five ovens of each type were constructed and successfully tested. The amplitude of the crystal operating temperature oscillation, power consumption and warm-up time are within the required limits for the type E6, G6G and H6 ovens. Power consumption of the type F6G ovens is 50 higher than specified. Author

Author(s):
Black, Igor A. ; Peterson, John F.
Author Organization(s):
LITTLE (ARTHUR D) INC CAMBRIDGE MASS
Descriptive Note:
Final rept. for 2 Jul 62-29 Feb 64,
Annotation:
Methods for low power temperature control.
Pagination:
0126

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
DA36 039sc90883
Task Number(s):
1G640306D48802
 Subject Terms
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*TEMPERATURE CONTROL, CRYSTAL OVENS, CRYSTAL OVENS, QUARTZ, THERMOSTATS, STABILITY, TEMPERATURE, DEGASIFICATION, THERMAL INSULATION, SWITCHING CIRCUITS, HEATING ELEMENTS, SPECIFICATIONS, MINIATURE ELECTRONIC EQUIPMENT, SEALS(STOPPERS)
Report Date:
1964 Feb 29