Accession Number:

ADD012276

Title:

Multiple Thermocouple Testing Device.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Report Date:

1986-02-18

Pagination or Media Count:

11.0

Abstract:

An automated multiple thermocouple testing device determines short and open circuits in a thermocouple system. The thermocouple system that has a plurality of temperature probes, each probe has a first thermocouple. The device applies a direct current voltage to the first thermcouple to cause heating in the second thermocouple and a second thermocouple and then reads the temperature response of the second thermocouple. The first thermocouples have a common lead and the second thermocouples are connected in two parallel groups. The temperature output of the second thermocouple is digitized and read by a computer. These readings are compared to critieria which determines if there is an open circuit. Before the open circuit test is applied, the device also determines which thermocouple probe has a possible short circuit. This device can automatically test for short and open circuits in a thermocouple system within a few minutes without the necessity of removing the probes from their installed position. This device was adapted to preform the above testing on a F100 fan turbine inlet temperature FTIT system.

Subject Categories:

  • Electrical and Electronic Equipment
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE