Fluke 9933 3.4 Import/export file format

Note: If CJC readings are entered in temperature, the standard thermo-

couple coefficients for the selected thermocouple type are used to calcu-

late the voltage at each reading. The calculated voltages are then added to

each corresponding UUT reading before calculating characterization co-

efficients for the UUT. IfCJC readings are entered in voltage, they are

converted to the correct scale (i.e. mV or µV) and added to each corre-

sponding UUT reading.

The yellow boxes designate the values that must be filled in for the type of co-

efficients being calculatedto produce an exact solution. Entering values into

the white boxes is optional and produces an overdeterminedsolution. Section

3.8, Methods Used for Calculating Coefficients, contains additional

information.

Note: The algorithm used to calculate thermocouple coefficients forces

the EMF at 0°C to 0.0µV. Therefore, using a set-point at or near 0°C when

calculating thermocouple coefficients may cause erroneous results. For

best results, use at least two set-points that are not near 0°C (more than

±5°C).

The Import button reads raw data in from an ASCII text file. The data must be

stored in the text filein the format required for calculating Thermocouple coef-

ficients. The import fileformat for thermocouple coefficients is discussed in

Section 3.4.3.

The Export button savesthe current raw data to an ASCII text file.

The Calculate button calculates the coefficients and displays the Coefficients

and Residuals dialog.

A warning message will appear when calculating thermocouplecoefficients if

one of the selected set-points is within 5° of 0°C. Selecting the OK button will

attempt to calculate the coefficients. For best results, use at least two set-points

that are not near 0°C (more than ±5°C).

The Cancel button returns to the Thermocouple Probe Coefficientsdialog.

3.4 Import/export file format

The format of the import/export ASCII textfile is dependent upon the type of

coefficients tobe calculated. The following sections explain the required format

for each type of import/export file.

The raw data for calculating ITS-90 coefficients can be imported from an

ASCII text fileor exported to an ASCII text file by selecting the Import or Ex-

port button respectivelyon the Raw Data dialog. The file containing the im-

port/export raw data should be savedwith a .TXT extension.

9933 TableWare

User’s Guide