Dillon FI-127 - Manual (Page 58)

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Freeze Force Function
Whenever a ‘freeze’ action (assigned to hardware input and/or a serial input
character) is executed, the current a-d value (at the output of the low-pass filter)
is captured, or “frozen”. An ‘unfreeze’ action (assigned to hardware and/or a serial
input character) may be used to “unfreeze” the force value. These actions can only
be executed while the instrument is in the display mode — they are ignored at any
other time.
Whenever Force is selected in the display mode, the frozen value is displayed
(linearized and scaled as a normal force measurement) with the letter “F” as a
prefix, in the form “F 1234.5”. (If data capture is in progress, “b” is displayed
instead of “F” or “C”). The ‘Force’ annunciator, ‘Tension’ or ‘Compress’ and a
unit of measure annunciator are active to properly identify the frozen force value.
The front panel keys perform their usual functions with the following modifica-
tions:
ESCAPE and ENTER immediately “unfreeze” the force value.
ZERO and PEAK RESET also unfreeze the force value in addition to their usual
functions.
Analog output, BCD output, cutoffs, bounds checking, printed force all use the live
force, even if the force display has been frozen. The Disp. layout item provides a
way to print frozen force if required. In this case, the force output is prefixed
with an “F”.
Control
Display
Keypad
Outputs