April 2008
4-8
Parts Replacement
Installing the Printed
Circuit Board (cont.)
5.
Connect the twisted-pair backlight cable to socket
J2
on the left
edge of the printed circuit board. This plug is polarized so that it
can only be installed in the proper orientation, with the black wire
above the red wire.
6.
Check for and remove any loose hardware that may have fallen
into the electronics console during the maintenance procedure.
7.
Place the main shroud over the six upper standoffs on the printed
circuit board. Making sure that the shroud is oriented with the
wiring diagram label upright, fasten the shroud to the standoffs
with the six sets of screws and washers.
8.
Reconnect the power line wires and the PC board ground wire to
terminal block
TB1
on the printed circuit board. Plug all other
electrical connectors into the appropriate sockets on the printed
circuit board and option cards. See Chapter 1,
Installation
, of the
Startup Guide
for instructions on proper wiring of the Model
GC868.
Note:
For an LVD compliant meter with the clear plastic shroud
over the electrical connectors, there will be standoffs in the
two mounting locations along the bottom edge of the printed
circuit board. For meters not equipped with this shroud, there
will be Phillips head screws in these two locations.
9.
For LVD compliant units, position the clear plastic LVD shroud
over the electrical connections so that the two holes in the shroud
align with the standoffs on the printed circuit board. Secure the
shroud to the standoffs with the two sets of screws and washers.
10.
After carefully checking for and removing any loose hardware in
the enclosure, close the electronics console and reconnect the
main power to the Model GC868.
Note:
For compliance with the European Union’s Low Voltage
Directive (73/23/EEC), this unit requires an external power
disconnect device such as a switch or circuit breaker. The
disconnect device must be marked as such, clearly visible,
directly accessible, and located within 1.8 m (6 ft) of the
Model GC868.
Before taking measurements with the Model GC868, refer to Chapter
2,
Initial Setup
, of the
Startup Guide
and Chapter 1,
Calibration
, of
the
Service Manual
for instructions on properly setting up the meter
for accurate flow rate measurements.
Summary of Contents for DigitalFlow GC868
Page 6: ...Chapter 1 ...
Page 23: ...Chapter 2 ...
Page 31: ...Chapter 3 ...
Page 39: ...Chapter 4 ...
Page 52: ...Appendix A ...
Page 53: ...Service Record Introduction A 1 Data Entry A 1 Diagnostic Parameters A 3 ...
Page 57: ...Appendix B ...
