Title:
CALORIMETRIC UNIT AND METHOD
Document Type and Number:
Japanese Patent JP2949314
Kind Code:
B2
Abstract:
PURPOSE: To provide a calorimetric unit and method whereby the heat capacity of trace amounts of samples can be measured with high accuracy.
CONSTITUTION: In the sample container 1 and the heat insulated container 7 of an insulated calorimeter which can measure the heat capacity of material with high accuracy, a temperature sensor 8 is provided to the heat insulated container 7 which is so controlled to be at the same temperature as the sample container 1. A thermocouple 6 detects the temperature difference between the insulated container 7 and the sample container 1 and a calorimetric circuit is used which employes as sample temperature the temperature of the insulated container 7 at which the temperature difference becomes zero. The temperature sensor can thus be excluded from the sample container 1 and the heat capacity of the sample container 1 can be lowered so that trace amounts of samples can be measured. Furthermore, errors in measurements are reduced since heat conduction from the sample container 1 is reduced.
More Like This:
| JP4808905 | Gas meter |
Inventors:
TANJI KAZUTOSHI
Application Number:
JP22896891A
Publication Date:
September 13, 1999
Filing Date:
September 09, 1991
Export Citation:
Assignee:
HITACHI SEISAKUSHO KK
International Classes:
G01K17/00; G01N25/00; G01N25/20; (IPC1-7): G01K17/00; G01N25/00; G01N25/20
Domestic Patent References:
| JP5222977A | ||||
| JP54160189U |
Attorney, Agent or Firm:
Unuma Tatsuyuki
Previous Patent: MAGNETIC HEAD SLIDER AND MAGNETIC DISK DEVICE
Next Patent: MILDEW-PROOFING OF BUILDING BY METAL SPRAYED FILM
Next Patent: MILDEW-PROOFING OF BUILDING BY METAL SPRAYED FILM