Cooper Instruments & Systems DFI INFINITY Digital Force Indicator/Controller - Manual (Page 71)

16.1 Tare (PIN 1)
Tare is available when pin P2-1 and P2-4 are connected to a momentary contact switch. This feature allows you to
automatically zero your meter when the switch is activated.
16.2 Peak (PIN 2)
When this is connected to P2-4 by an external switch, the meter displays the stored PEAK (“HI RDG”) value rather
than the current reading. The display flashes to distinguish this value.
16.3 Valley (PIN 3)
When this is connected to P2-4 by an external switch, the meter displays the stored valley (“LO RDG”) value rather
than the current reading. The display flashes to distinguish this value.
16.4 SWLIN2 (PIN 4)
Completes the circuit for any of the above three signals.
16.5 Peak & Valley Or External Reset (PIN 5)
Connecting this to ground (P2-7) when “RDG.7=0” has been programmed causes a “HARD” RESET (when you see
“RESET2” on the display). If you set “RDG.7=1”, grounding causes only a PEAK/VALLEY RESET.
16.6 Push To CAL (PIN 6)
The Push To Cal feature is only available for the Strain Gauge meter and the Universal meter when configured for
the BRIDGE mode.
This feature allows you to connect an external calibration resistor to P2-6 and P2-14 at the rear of the meter. Note:
Use a one-way switch only.
If your selected calibration resistor is to be mounted externally (in series with your switch), install a SHORT in place
of R35.
Note: This short is already installed at the factory.
If your selected calibration resistor is to be mounted internally, solder it in the holes of R35 on the input board. See
Figure 5.6.
16.7 Digital Ground (PIN 7)
This is a non-isolated ground to be used for the digital controls provided on this P2 connector.
WARNING: THIS METER GROUND IS NOT ISOLATED FROM THE SIGNAL INPUT AND SHOULD NOT BE
CONNECTED TO EXTERNALLY-GROUNDED DEVICES UNLESS ISOLATION IS PROVIDED EITHER AT THE
SIGNAL INPUT OR AT THIS EXTERNAL-LOGIC CONNECTION.
16.8 +5 V (PIN 8)
Up to 20 mA is available for driving external devices, but isolation should be provided if there is a possibility of
common mode (ground) currents, since this supply is NOT isolated from the signal input.
16.9 Display Hold (PIN 9)
Grounding this pin to P2-7 freezes the display value. However, the meter continues to take new samples and
update the other outputs, such as Analog Output, BCD, Setpoints/Alarms, and Peak/Valley.
16.10 Lockout EEPROM (And ‘MENU’ Button) (PIN 10)
Grounding this pin to P2-7 stops any configuration changes and new storage into the non-volatile memory, and
when in run mode does not allow entry into the setup mode when the ‘MENU’ button is pressed.
CF 67 66 M1291/N/0403 11279ML-02 Rev. A