Cooper Instruments & Systems DFI 1650 Multi-Channel Digital Force Indicator - Manual (Page 48)

CF 66 42 Rev. C 2/05
• The display will read WORKING, then APPLY 01000 UNIT (where 01000 and UNIT are previously entered as
KNOWN POINT 3/3 and DISPLAY.UNITS). When you have applied this displacement to the transducer, press
[ENTER].
• Upon completion, the display will indicate DONE and the instrument will return to the RUN mode.
If the CALIBRATION TYPE is a 5-Point Known Displacement Calibration…
• The display will read DOING 5POINT CAL, and prompt you to APPLY 00000 UNIT (where 00000 and UNIT are
previously entered as KNOWN POINT 1/5 and DISPLAY.UNITS). When you have applied this displacement to
the transducer, press [ENTER].
• The display will read WORKING, then APPLY 00250 UNIT (where 00250 and UNIT are previously entered as
KNOWN POINT 2/5 and DISPLAY.UNITS). When you have applied this displacement to the transducer, press
[ENTER].
• The display will read WORKING, then APPLY 00500 UNIT (where 00500 and UNIT are previously entered as
KNOWN POINT 3/5 and DISPLAY.UNITS). When you have applied this displacement to the transducer, press
[ENTER].
• The display will read WORKING, then APPLY 00750 UNIT (where 07500 and UNIT are previously entered as
KNOWN POINT 4/5 and DISPLAY.UNITS). When you have applied this displacement to the transducer, press
[ENTER].
• The display will read WORKING, then APPLY 01000 UNIT (where 01000 and UNIT are previously entered as
KNOWN POINT 5/5 and DISPLAY.UNITS). When you have applied this displacement to the transducer, press
[ENTER].
• Upon completion, the display will indicate DONE and the instrument will return to the RUN mode.
11.5.7 DAC SETUP Sub-Menu
This sub-menu contains four items that control the Digital-to-Analog (DAC) output of the channel.
DAC.CHANNEL Menu Item
This chooses which channel will drive the DAC output. Normally, the DAC located on a particular channel will be
driven by that channel, but that need not be the case. For example, if several channels were assigned to various
transducers in a system, the sum of all channels could (mathematically) drive one channel’s DAC output.
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.RESPONSE menu item. Otherwise, the Analog Output will operate
more slowly.
DAC.SOURCE Menu Item
This designates the data source of the channel monitored by the analog output. Each channel has three data
sources: the live tracking value (TRACK), its highest value (PEAK), and its lowest value (VALLEY).
The options for this menu item are:
• “TRACK” means the live tracking value of the channel.
• “PEAK” mans the highest value of the channel since the peak/valley detector was last cleared.
• “VALLEY” means the lowest value of the channel since the peak/valley detector was last cleared.
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.RESPONSE 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.
DAC.FULL-SCALE Menu Item
This specifies what value, in engineering units, corresponds to 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.