Honeywell SC Series - 10.5.9 Diagnostics and Linearization

36 Honeywell Sensing and Control
Signal Conditioning, Self Calibrating Digital Indicators
Rev. G, 008-0608-00
10.5.9 DIAGNOSTICS Sub-Menu
DAC FULL SCALE Menu Item
When this menu item is selected, the Analog Output of the chan-
nel is forced to its full-scale output, then DAC UPDATED is displayed.
This is useful when calibrating or trimming the readout connected
to the Analog Output.
DAC ZERO SCALE Menu Item
When this menu item is selected, the Analog Output of the
channel is forced to its zero-scale output, then DAC UPDATED is
displayed. This is useful when calibrating or trimming the readout
connected to the Analog Output.
VERSION INFO Menu Item
This menu item displays the part number and revision level of the
firmware used by this channels microprocessor.
DISPLAY ADC Menu Item
The options for this menu item are:
• “OFF” will allow the [VALUE] button to cycle through “TK”
(tracking value), “HI” (peak value) and “LO” (valley value).
This is the recommended option.
• “ON” will allow the “AD” (percentage of the Analog-to-Digital
converter’s full-scale digitizing capability) display source
to be available along with “TK” (tracking value), “HI” (peak
value) and “LO” (valley value) when the [VALUE] button is
pressed on the front panel.
The Analog-to-Digital converter counts are displayed as a per-
centage from -100.00% to 100.00%.
This can be used to verify that the transducer’s output does not
exceed the input range of the instrument. If the Analog-to-Digital
converterreadingsdisplaymorethan±10%whenthereisno
load on the transducer, the transducer has a high zero offset.
LINEARIZATION Menu Item
The options for this menu item are:
• “ON” will allow linearization data obtained from either the Sig-
nature Module or a 3-Point or 5-Point Known Load Calibra-
tion to affect a channel’s scaled values. This is the recom-
mended option.
• “OFF” will not allow linearization data to effect the channel’s
scaled values. This is useful when diagnosing problems in a
calibration procedure.
DISABLE CHANNEL Menu Item
The options for this menu item are:
• “ON” will bypass the INITIALIZE and RUN modes of the chan-
nel. The track, peak and valley values of the channel are
forced to 0. This option is helpful when a channel is installed
but not being used. ERROR 46, which will normally occur
when the (+)Sense and (-)Sense wires are not connected
properly, will be surpressed.
• “OFF” will allow normal operation of the channel.
10.6 Analog Output Conguration
10.6.1 Identifying the Output Type
A Strain-Gage Input channel is available with one of two types of
digital-to-analog (DAC) outputs: voltage or current. You can de-
termine which type of output a channel has by one of three ways:
• Consultingtheinstrument’sCustomerInformationSheet
• ExaminingtheSYSTEM MENU -> CONFIGURATION -> CHANNEL nn
TYPE menu item where nn is the number of the channel. If the
channel’s type is STRAIN GAGE V, it has a voltage output. If
the channel’s type is STRAIN GAGE I, it has a current output.
• Examiningthechannel’scircuitboardasshowninthegure
below.
10.6.2 Channel Menu Items
The Analog Output can be driven by any channel’s track, peak or
valley value.
See the “Channel Menu” section earlier in this chapter for a com-
plete listing of SETUP menu items available on the DAC. SETUP
sub-menu.
10.6.3. Output Selection
Jumpers located on the channel’s circuit board determine what
outputs are generated when the value selected to drive the Ana-
log Output (from the DAC. CHANNEL and DAC. SOURCE menu items)
equals the DAC. FULL SCALE and DAC. ZERO SCALE settings.