Data Input And Overriding Controls - DANIEL 2234 Manual

MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
3.5

DATA INPUT AND OVERRIDING CONTROLS

The values of the parameters used by the Model 2234 are derived from two
sources.
A. Line parameter measurements being monitored by the computer, or
calculations performed by the computer, are called variable or VAR values
since they change as line or calculation conditions change.
B. Operator-entered parameter values are called fixed or FXD values since they
do not change.
Some parameters can be only a measured or a calculated value, some can be
only an operator-entered value, and some parameters can be either a
measured or an operator-entered value. Only one value can be actively used
in the computer computations. The operator can select and switch to which-
ever type of value (measured/calculated or operator-entered) that is to be
active. Generally, an operator-entered parameter value is used in lieu of a
measured value when a problem occurs, such as when a line transmitter is
malfunctioning and is being removed for repair or replacement.
When the operator enters an access data code (Read Code) into the
computer, the display shows the type parameter value that is currently active.
Press the FXD or VAR key for the alternate value type to display the value
of the inactive parameter. Note that the inactive value is indicated by an
asterisk (*) located between the parameter mnemonic and the term, FXD or
VAR, e.g., "TF * FXD".
SECTION 3
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