Appendix C. Optional Enclosures
C-1
DigitalFlow™ GC868 Startup Guide (1 and 2-Channel)
C.1 Introduction
Upon request the Model GC868 flowmeter may be supplied in an enclosure other
than the standard Type-4X enclosure described in Chapter 1,
Installation
, of this
manual. Although the standard installation and wiring instructions still apply in
general terms, some of the details may vary for different enclosure types. Refer to
the appropriate sections of this appendix for the specific type of enclosure provided.
C.2 Rack Mount
Enclosure
The Model GC868 flowmeter is available in a
rack mount
enclosure for installation in
a standard 19” electronics rack. Refer to Figure C-1 on page C-3 for the dimensions of
this unit. Simply slide the Model GC868 into the rack at the desired height and fasten
the unit securely to the rack with four screws in the locations provided at the corners
of the front panel.
After the unit has been physically mounted into the rack, proceed to the next section
for instructions on wiring the meter.
C.3 Rack Mount
Wiring
The rack mount Model GC868 requires exactly the same electrical connections as
the standard version. However, the locations and type of connectors used for the
various components are different. Refer to Figure C-2 on page C-4 and complete the
following steps:
1.
Wire the
power input
on the right side of the rear panel as follows:
a. Make sure a
fuse
(item #4) of the proper size and type is installed.
b. Connect the female end of the
line cord
provided to the power input
receptacle (item #3).
c. Connect the
earth ground
screw terminal (item #2) to a ground point on the
rack.
2. Wire the
transducers
as follows:
a. Connect the pair of cables supplied with the meter to the
Channel 1
upstream and downstream BNC transducer connectors on the left side of
the rear panel.
b. For a 2-Channel meter, repeat the above step for the
Channel 2
transducer
connectors (if the second channel is to be used).
c. Complete the transducer wiring in accordance with the instructions in
Chapter 1,
Installation
, of this manual.
3. Wire the 0/4-20 mA
analog outputs
at the left side of the rear panel in accor-
dance with the instructions in Chapter 1,
Installation
, of this manual.
4. Wire the
RS232 serial port
by completing the following steps:
a. Purchase or prepare a suitable serial cable. This cable should have a
standard female DB9 connector, wired as shown in Figure C-2 on page C-4,
for connection to the rear panel of the Model GC868. The other end should
be as required for the external device.
b. Complete the serial port wiring in accordance with the instructions in
Chapter 1,
Installation
, of this manual.
5. Wire any installed
option cards
using the same procedures described in Chapter
1,
Installation
, of this manual and the pin # assignments shown in Figure C-2 on
page C-4.
6. Place the
power switch
(item #1) in the ON position.
The Model GC868 is now completely wired. Proceed to Chapter 2,
Initial Setup
, of this
manual for further instructions.
C.4 Rack Mount
Front Panel
The keypad and LCD display for the rack mount Model GC868 are located on the
front panel. These items are identical in form and function to those used on the
standard Type-4X enclosure, but the layout is somewhat different.
Refer to Figure C-3 on page C-5 for the front panel layout of the rack mount Model
GC868 and follow the standard procedures detailed in the main body of this
manual.
