DigitalFlow™ GC868 Service Manual (1 and 2-Channel)
B-6
Appendix B. Optional Enclosures
B.7.2 Circuit Board
Installation
Refer to Figure B-2 on page B-9 and complete the following steps:
1.
Position the new printed circuit board within the electronics console so that it
rests on the six standoffs in the base of the enclosure and the option card sock-
ets are located near the rear of the enclosure. Secure the circuit board in place
with the six screws previously removed.
2. Connect the flat LCD DISPLAY CABLE connector to terminal J52 near the option
card sockets. Make sure the marked pin #1 side of the cable connector is located
nearer the front of the enclosure.
3. Connect the twisted-pair DISPLAY BACKLIGHT cable to connector J2 beneath the
left side of the printed circuit board. This connector is polarized and can only be
installed with the red wire closer to the rear of the enclosure.
4. Connect the flat KEYPAD CABLE connector to terminal J50 near the front of the
printed circuit board. Make sure the marked pin #1 side of the cable connector is
located nearer the rear of the enclosure.
5. Install the RS232, ANALOG OUT and TRANSDUCER connectors onto the printed cir-
cuit board at the locations indicated in Figure B-2 on page B-9. Make sure the
marked pin #1 sides of the connectors face the right side (keypad side) of the
enclosure.
Note:
If any leads have come loose from the screw terminals on these connectors,
refer to Appendix C,
Optional Enclosures
, of the
Startup Guide
for wiring
instructions.
6. Reconnect the main POWER LEADS to the screw terminals at the rear of the
printed circuit board. When properly installed, the lead colors should be green,
white and black, from left to right (as viewed from the front of the enclosure).
7. Reinstall all option cards, as described earlier in this chapter. Insert all external
option card connectors at the rear panel of the meter.
8. After checking for any loose hardware that may have fallen into the enclosure,
reinstall the top panel on the meter and secure the panel in place with the four
screws previously removed.
The Model GC868 flowmeter may now be placed back into service. Reconnect the
main power and refer to Chapter 2,
Initial Setup
, of the
Startup Guide
and Chapter 1,
Calibration
, of this
Service Manual
for instructions on properly setting up the meter
for accurate flow rate measurements.
Note:
Be sure to record the printed circuit board replacement in Appendix A,
Service Record
.