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FILE STRUCTURES
The files created by the HP-71 Data Acquisition Pac are all of type [IHTH, and correspond to the HPAF
file format. The data files are used to store either setup information or data that has been collected. The
programs that create data filesare = TE IF MOMITORE, and LOG. The EEFUORET program can read data
files from any of the three programs, but does not use the setup files.
Each program that can create a setup file (TE IF, MOMI TOR, and ZETLIF) has unique requirements,
and thus the setup files are different for each program. The first three headings in this appendix discuss
the setup files. The last heading describes the format for data files, which are organized the same way by
each application.
1.1 STRIP CHART SETUP FILES
A strip chart setup may contain the specifications for up to nine traces.
Each trace needs information
about the nature of the measurement being taken, and scaling information for the printout.
The file
contains a header block, and one data record for each trace.
No descriptor block is used, so record two of
the file contains a zero.
The type string is HF AF MFHMH'='='=. The strip chart program reads the setup records with the following
statement:
FEARD #1, I+2sF Cla Clo Inelon loaHOTIHIFIRAE CTINDFECT
The subscript I refers to the trace number. The variables are used as follows:
Foe
This variable stores the number of the function being measured.
The function
numbers are:
DC Volts
: AC Volts
4-20ma Current
: Two Wire Ohms
Four Wire Ohms
Frequency
: T Thermocouple
E Thermocouple
: J Thermocouple
10: K Thermocouple
11: R Thermocouple
12: S Thermocouple
13: 2K Thermistor (2WQ)
14: SK Thermistor (2WQ)
15: RTD (2wQ)
16: 2K Thermistor (4WQ)
17: SK Thermistor (4WQ)
18: RTD (4wQ)
19: Digital Bit
I-1
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