Thermometer calibration by immersion in non-electrically conductive liquid

A non-conductive, electronic temperature technology used in the field of calibration systems to solve problems such as increased calibration time, package leakage, etc.

Inactive Publication Date: 2007-11-28
TYCO HEALTHCARE GRP LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various problems arise with the use of such packs, including additional pack loading and pack unloading steps, potential pack leaks, condensation within the pack, air gaps

Method used

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  • Thermometer calibration by immersion in non-electrically conductive liquid
  • Thermometer calibration by immersion in non-electrically conductive liquid
  • Thermometer calibration by immersion in non-electrically conductive liquid

Examples

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example

[0053] The following example demonstrates the application of the first and second calibration equations to a Dexter ST60 polysilicon resistor. This example uses the following equation, where the temperature is converted to absolute temperature:

[0054] T s = a + b R + c R 2

[0055] Specifically, the temperature of the reference temperature sensor may be controlled to a first temperature value of 10°C (50°F), a second temperature value of 25°C (77°F), and a third temperature value of 40°C (104°F). With these three temperatures, these three equations and three unknowns can be solved for a, b and c as follows:

[0056] a = T 10 · R 10 2 ...

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Abstract

A method for calibrating a thermometer is disclosed. The thermometer comprises a primary temperature sensor for determining the temperature of a target. The thermometer also comprises a reference temperature sensor positioned proximate to the primary temperature sensor and being responsive to an extraneous temperature affecting the primary temperature sensor. One calibration method calibrates the reference temperature sensor. This calibration can utilize a non-electrically conductive liquid bath for temperature control. Another calibration method calibrates the reference temperature sensor and the primary temperature sensor.

Description

technical field [0001] The present invention generally relates to a calibration system for calibrating electronic thermometers. More particularly, the present invention relates to calibrating a reference temperature sensor (eg, a temperature-dependent resistor) and a primary temperature sensor (ie, a thermoelectric element) in an ear thermometer. Background technique [0002] The diagnosis and treatment of many human diseases rely on accurate readings of the internal or core temperature of a patient's body temperature readings and, in some cases, on comparisons to previous body temperatures. For many years, the most common way of taking a patient's temperature involved the use of a mercury thermometer. However, such thermometers are easily broken and must be inserted and held in the rectum or mouth for several minutes, often causing patient discomfort. [0003] Because of the deficiencies of conventional mercury thermometers, electronic thermometers were studied and are no...

Claims

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Application Information

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IPC IPC(8): G01K15/00
CPCG01J5/16G01J2005/0048G01K15/00G01J5/522G01J5/80G01J5/53
Inventor L·H·斯科特
Owner TYCO HEALTHCARE GRP LP
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