App-6
IM 2553A-01EN
Creating Data
User-defined data is created in text format as shown in the figure below. User-defined data contains
characters that indicate the type for distinguishing user definitions (type characters), upper and lower
limits of temperature ranges, coefficients of polynomials, and the like. For details on the syntax, see
“Definition Specifications” later in this section.
The following webpage provides user-defined data samples.
http://tmi.yokogawa.com/products/generators-sources/standard/precision-dc-calibrator-2553a/
TYPE:L
0, 10, 0.00E+00, 1.00E+00, 2.00E+00
10, 20, 0.1E+00, 1.10E+00, 2.10E+00
Line 1
Line 2
Line 3
Type character (1 character)
Lower limit
of range
0th order
coefficient
1st order
coefficient
2nd order
coefficient
Upper limit of range
(First
temperature
range)
(Second
temperature
range)
Lower limit
of range
0th order
coefficient
1st order
coefficient
2nd order
coefficient
Upper limit of range
Data in text format
Files That Are Saved
The text data that you create is saved as a definition file. The definition file name is fixed. The name is
not case sensitive.
• TC USER definition file name: TCUSER.TXT
• RTD USER definition file name: RTDUSER.TXT
Writing to the 2553A
Write the user-defined data from a definition file to the 2553A using the USB mass storage feature.
Before the data is written , the 2553A checks for errors in the data. If there are no errors, the data will
be written to the 2553A’s internal memory. If data is already written, it is updated. If there is an error,
the contents in the internal memory will not be updated.
Writing with Communication Commands
You can use communication commands to write user-defined data to the 2553A. A character string
is sent for each temperature range using communication commands. A character string must be
enclosed in single quotation marks or double quotation marks. To use communication commands to
source the thermoelectromotive force or resistance according to the user-defined data, a sequence
of commands needs to be executed. For details, see the description of the
:SOURce:RTD:DEFine
or
:SOURce:TCouple:DEFine
command in the SOURce group.
Example: A character string sent using a communication command
"0, 10, 0.00E+00, 1.00E+00, 2.00E+00"
'0, 10, 0.00E+00, 1.00E+00, 2.00E+00'
Appendix 4 User Definitions of Thermocouples and RTDs
