Cooper Instruments & Systems DFI 1650 Multi-Channel Digital Force Indicator - Manual (Page 39)

CF 66 33 Rev. C 2/05
If the DAC is set-up to be driven by its own channel’s tracking value, the Analog Output will have the frequency
response specified by the channel’s FREQ.ESPONSE menu item. Otherwise, the Analog Output will operate more
slowly.
DAC.ZERO-SCALE Menu Item
This specifies what value, in engineering units, corresponds to zero output on the Analog Output.
“Zero output” might be 0 Volts, 2.5. Volts, 5 Volts, 4 mA or 12 mA depending on if the channel has a voltage or
current output and how it is configured. See the “Digital-to-Analog Output” section of this chapter for details.
If the UPDATE DAC SETUP menu item is set to “ON” and the DAC.CHANNEL menu item is set to this channel,
this menu item may be automatically updated by a transducer’s Signature Module. If the UPDATE DAC SETUP
menu item is “OFF”, a transducer’s Signature Module will not change this menu item.
DAC.FULL-SCALE Menu Item
Specifies what value, in engineering units, corresponds to a full output on the Analog Output.
“Full output” might be 5 Volts, 10 Volts or 20 mA depending on if the channel has a voltage or current output and
how it is configured. See the “Digital-to-Analog Output” section of this chapter for details.
If the UPDATE DAC SETUP menu item is set to “ON” and the DAC.CHANNEL menu item is set to this channel,
this menu item maybe be automatically updated by a transducer’s Signature Module. If the UPDATE DAC SETUP
menu item is “OFF”, a transducer’s Signature Module will not change this menu item.
10.5.8 SIGNATURE MODULE Sub-Menu
UPDATE SIG.MOD? Menu Item
Updates the information stored in the transducer’s Signature Module with any new settings that is entered into the
instrument with the SETUP menus. The settings that will be updated are:
• EXCITATION
• FULL SCALE MV/V
• FULL SCALE VALUE
• SHUNT CAL VALUE
• DISPLAY.UNITS
Note that changes made to the instruments display setup (such as decimal point and count-by settings) are not
updated into the Signature Module.
Updating enters these new settings from the instrument into the Signature Module. If you do not update the
Signature Module
, connect a different transducer to the instrument and then re-connect the original transducer
again, the instrument will revert to the settings that are stored inside the Signature Module.
The options for this menu item are:
• “NO” will not update the Signature Module.
• “YES” will display WORKING; update the Signature Module, then display DONE.
DEFAULT SIG.MOD? Menu Item
This menu item will overwrite any user settings in the Signature Module with the original default settings. The
Signature Module always maintains a copy of the original default settings that were created at the factory.
The options for this menu item are:
• “NO” will not restore original default settings.
• “YES” will display WORKING, update the Signature Module, with the original factory settings, then display
DONE.
UPDATE DAC SETUP Menu Item
This menu item determines whether or not the DAC.FULL SCALE and DAC.ZERO SCALE Analog Output settings
are overwritten with information from a Signature Module when a new transducer is detected by the instrument.
The options for this menu item are: