GSE Scale Systems - 233
Chapter 22 Multi-Scale Inputs and Capabilities (OPTION)
Technical Reference Manual
so that the 'D' connector protrudes through the rear
panel.
8 Secure the circuit board to the rear panel with the
two hex jackscrews (item 5) into the 'D' connector.
Use of Loctite 242
®
or similar material on the
threads will prevent these from loosening when the
mating connector is removed in the future. A 3/16"
nutdriver will fit the jackscrews.
9 If a second Multi-Scale option is to be installed into
the same 574, secure the first circuit board with a 16
mm long hex male/female standoff (item 7) on
each stud (using a 6mm nutdriver). Otherwise
secure the board with the M4x0.7 hex lock nuts
(using a 7mm nutdriver).
10 If an external scale platform with six leads is to be
connected to the Multi-Scale circuit board, then cut
sense jumpers E1 and E2 (next to the right stud) in
order to use external sense and achieve optimum
performance.
11 If a second Multi-Scale option is to be installed in
the same 574, proceed with the following steps.
Otherwise, if a 4503 Sample Scale is to be installed,
refer to the instructions supplied with it and proceed
with its installation. If no other options are being
installed, proceed to the instructions for entering in
the calibration parameters.
Hardware installation procedure for a SECOND
Multi Scale option kit: (Refer to figure 34)
1 The second Multi-Scale option is installed in much
the same manner as the first option kit. If the low
capacity sample scale is installed, remove the
circular loading plate by gently pulling up on it.
Then remove the two sample scale mounting screws
from the bottom of the chassis and carefully take out
the sample scale assembly. Otherwise, if the 574 is
not already opened, open it as described in step one
above.
2 Remove the upper cover plate (marked "Scale 3")
covering the rear panel 'D' connector opening by
removing the screw at each end.
3 If the first Multi-Scale circuit board is secured with
hex nuts, remove them and replace both nuts with
the 16 mm long hex standoffs (item 7).
4 If the 4503 internal Sample Scale is to be installed
and connected as Scale #2, then connect it to
connector J4 on the lower Multi-Scale circuit board
now. The wires should exit the connector toward
the front of the 574. Make sure that all four pins of
the header are mated with the connector.
5 Connect one end of the Multi-Scale ribbon cable
(item 6) to J2 on the first Multi-Scale option circuit
board. The cable should exit the connector toward
the 574 main circuit board.
6 Place the insulator sheet (item 1) over the standoffs
in the same orientation as the board below it.
7 Slide a nylon spacer (item 2) over each of the studs.
8 Put the 2nd Multi-Scale circuit board (item 3) into
the housing and connect the other end of the cable
into the header near the edge of the board, marked
J1.
9Slant the circuit board into position over the studs
so that the 'D' connector protrudes through the rear
panel.
10 Secure the circuit board to the rear panel with two
hex jackscrews (item 5) into the 'D' connector. Use
of Loctite 242
®
or similar material on the threads
will prevent these from loosening when the mating
connector is removed in the future. A 3/16"
nutdriver will fit the jackscrews.
11 Secure the board with two M4x0.7 hex lock nuts
(item 4) using a 7mm nutdriver.
12 If an external scale platform with six leads is to be
connected to the Multi-Scale circuit board, then cut
sense jumpers E1 and E2 (next to the right stud) in
order to use external sense and achieve optimum
performance.
Load Cell Connections:
Each Multi-Scale option circuit board has two scale
platform connectors on it, one four pin header internal to
the 574, and one 9 socket 'D' connector which is
mounted through the rear panel of the 574. The pinout
of these connectors is specified in table 40.
Sense Lead Connections:
As indicated in the installation instructions, in order to
use the sense leads of the Multi-Scale option, you must
first cut jumper wires E1 and E2 on the Multi-Circuit
board. If these jumpers are not cut then the use of a six
lead load cell cable will not provide the benefits of
SECTION - 22.4
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