Operator`s manual

APPENDIX A. GLOSSARY
A-2
INTERMEDIATE STORAGE: That portion of
memory allocated for storing the results of
intermediate calculations necessary for
operations, such as averages or standard
deviations. Intermediate storage is not
accessible to the user.
LOW RESOLUTION: This is the default output
resolution. A low resolution data value has
4 significant decimal digits and may range
in magnitude from ±0.001 to ±6999. A low
resolution data value requires 1 Final
Storage location (Section 2.2).
OUTPUT ARRAY: A string of data points
output to Final Storage. Output occurs only
when the Output Flag is set. The first point
of an Output Array is the Output Array ID,
which gives the table and the Instruction
Location Number of the instruction which
sets the Output Flag. The data points
which complete the Array are the result of
the Output Processing Instructions which
are executed while the Output Flag is set.
The Array ends when the Output Flag is
reset at the end of the table or when
another instruction acts upon the Output
Flag. Output occurs only when the Output
Flag is set.
OUTPUT INTERVAL: The time interval
between initiation of a particular Output
Array. Output occurs only when the Output
Flag is set. The flag may be set at fixed
intervals or in response to certain conditions
(Section 3.7).
OUTPUT PROCESSING INSTRUCTIONS:
These instructions process data values and
generate Output Arrays. Examples of
Output Processing Instructions include
Totalize, Maximize, Minimize, Average, etc.
The data sources for these instructions are
values in Input Storage. The results of
intermediate calculations are stored in
Intermediate Storage. The destination of
data generated by Output Processing
Instructions is Final Storage. The transfer
of processed summaries to Final Storage
takes place when the Output Flag is set by
a Program Control Instruction.
PARAMETER: When used in conjunction with
21X instructions, parameters are numbers
or codes which are entered when
programming the 21X to specify exactly
what the instruction is to do. Once the
instruction number has been entered in a
program table, the 21X will prompt for the
parameters by displaying the parameter
number in the ID Field of the display.
PROCESSING INSTRUCTIONS: These
instructions allow the user to further
process input data values and return the
result to Input Storage where it can be
accessed for output processing. Arithmetic
and transcendental functions are included
in these instructions.
PROGRAM CONTROL INSTRUCTIONS:
These instructions are used to modify the
sequence of execution of instructions
contained in program tables, and to set or
clear flags.
PROGRAM TABLE: That portion of memory
allocated for storing programs consisting of
a sequence of user instructions which
control data acquisition and processing.
Programming can be separated into 2
tables, each having its own execution
interval. A third table is available for
subroutines which may be called by
instructions in Tables 1 or 2. The *1 and *2
Modes are used to access Tables 1 and 2.
The *3 Mode is used to access Subroutine
Table 3. The length of the tables is
constrained by the total memory available
for programming (Section 1.1). Table 1
execution has the higher priority; it may
interrupt Table 2.
SAMPLE RATE: The rate at which
measurements are made. The
measurement sample rate is primarily of
interest when considering the effect of time
skew (i.e., how close in time are a series of
measurements). The maximum sample
rates are the rates at which measurements
are made when initiated by a single
instruction with multiple repetitions.