F8 – Discriminator Plot
Gem-5 User’s Manual 81
ULD: Sets the Upper Level Discriminator (ULD). The range is 0 to 5.0 V (default is
5.000V).
Board ID: Shows the type of Detector Board being examined for that zone.
Function Keys
F1 = Start Collection: starts data collection. The current settings and data are
displayed in real time below the plot during collection.
The F1 key description is replaced with “Detector Missing” if the selected detector
board is not responding and will therefore not start collection for that detector.
Recovery is automatic if the detector shows up again (must ESC out of the screen and
re-enter by pressing F8). The plot aborts if the detector goes missing while
collecting.
F2 = Collect all Detectors with same Board ID (Ctrl=All): Pressing F2 collects
data for all detectors whose Board ID matches current detector's Board ID. Pressing
Ctrl+F2 collects data for all detectors.
Note: All detectors being collected are scanned for the smallest Minimum Volts for
the initial collection voltage and collection continues until the largest
Maximum Volts is reached.
F3 = Stop Collection: Stops the voltage sweep.
F4 = Clear Collection: Clears the data and moves DISC*.CSV file to the Windows
Recycle Bin (so that it can be restored).
F6 = Set Factory Defaults: Sets the selected item to the factory default, while
Ctrl+F6 sets all items on this screen to the factory defaults (i.e. for one channel of one
detector).
Ctrl+F7 = Recall Previous Settings: Restores all values to those in effect for the
selected detector and channel when the screen was opened.
Ctrl+F8 = Set All Detectors = to this one: Sets values for all items on this screen for
all detectors with same Board ID to the values currently displayed.
While a plot is underway only the F3 key is active. As a result, the Esc key will not
return to the previous menu while a plateau plot is in progress.
Detectors put in Conditional Service on the F4 – Faults screen on page 221 show
the words “Conditional Service” in place of the F1 = Start Collection description. In
addition, these detectors grey out the F3 = Stop Collection choice. The
Discriminator, Minimum Volts, Maximum Volts, Step Volts, Dwell Time and
Maximum Rate and Scale Type settings for any detectors in Conditional Service are
still changeable so that one may use these to possibly correct a fault that might have
taken the detector Out of Service in the first place.
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