ITS-90 Software

• An MS-DOS Computer Program for interpolation of
  ITS-90
• MS DOS compatible with most computers 3.5" disk size
• Comprehensive manual supplied

These resistances need to be substituted into a set of polynominals specified in ITS-90 which eventually prints out a resistance/temperature table enabling the sprt to be specified at any temperature within the range of intent.

Developed for our own use and now available commercially, the Daedalus program is described below.

Daedalus Program
Daedalus 1.1(P) is an MS-DOS compatible software programme for interpolating and printing or displaying a platinum resistance thermometer table on ITS-90. Any of the 11 ranges of the Scale may be chosen, within the limits of -259.3467°C and 961.78°C. Arbitrary ranges may also be chosen. The required input is resistance measured at the fixed points of the Scale or user selected temperature values prescribed for the chosen range. Output may be to screen or to most printers compatible with IBM MS-DOS machines or clones, with either temperature, resistance or resistance-ratio as the independent variable. Temperature values may be chosen in °C, °F or K.

The program is supplied on a single 3.5" disk.

A comprehensive manual is included.

CERTIFICATE OF CALIBRATION
PLATINUM RESISTANCE THERMOMETER
SERIAL NO: 141127/1
	TEMPERATURE °C	R(T90)	INCREMENT 
	-50.0000	80.2912	0.3975
	-49.0000	80.6887	0.3974
	-48.0000	81.0861	0.3973
	-47.0000	81.4834	0.3971	
	-46.0000	81.8805	0.3970
	-45.0000	82.2775	0.3969
	-44.0000	82.6744	0.3967
	-43.0000	83.0711	0.3966
	-42.0000	83.4677	0.3965
	-41.0000	83.8641	0.3963
      

Data Entry Screen 1
Data Entry screen 2

Examples of the MS-DOS 'Daedalus' Program Entry Screens. This broad range of calibration temperatures would be inappropriate for any single thermometer