GSE Scale Systems - 257
Chapter 27 Other System Operations and Applications Technical Reference Manual
Chapter 27
Other System Operations and
Applications
27.1 Gross Entry Mode (P169)
P169.XX GrENT
This parameter will allow keyboard entry of the Gross
Weight data. If this parameter is enabled, the normal
operation would be to key in a Tare Weight, the
previously determined Gross Weight and then press
<ENTER>. The entered value is stored in the Gross
Weight register. Then the Tare Weight is subtracted and
the result is stored in the Net Weight register. Next a
transmission of the 4th Custom Transmit (set up at
P4000) is initiated. This would normally be used to print
a ticket when the Gross Weight has been previously
established. Note that after the transmission, the entered
Gross data is immediately overwritten by the current
weight conversion data.
NOTE:
This procedure is not H-44. This is limited to few
applications.
27.2 Battery Operation
Included on the 574's main board is a connector, J3,
intended for use with an external D.C. supply. However,
any connection made to this connector by any device not
explicitly approved for this purpose will void the safety
approval. This connector's three pins are described in
the table below:
J3 Pinout:
Pin # Voltage/Usage
GD Ground
DC +8v -> +28v DC @ 1 Amp input:
maximum current draw
-or-
+24v +-10% DC output @ 100 mA
max.
for charging when AC power is
applied.
(external regulation required).
AC 9.5 Vac +/- 15%
This connection is to accomadate a
possible future external charging
control circuit. It will allow the
sensing of the AC supply for charging
circuitry and automatic switch-over
between AC and DC operation.
Caution: If a battery is connected into this connector,
there is NO protection against reversed connections or
inadvertent unregulated charging! Therefore external
protection, such as fusing (1A-SloBlo) and an in series
diode, should be implemented to prevent damage to the
instrument and/or battery! Additionally, the removal of
the AC power cord from the instrument may be
advisable, where possible, to further guarantee against
charging the battery.
WARNING: Some batteries may explode
if they are
charged without proper voltage and current regulation!
The standard connector to mate with J10 on the printed
circuit board is a 3 position insulation displacement
connector, GSE p/n 26-20-3266, which will
accommodate 18 AWG wire. A special tool, available
from Amp, Inc, is required to properly insert the wires
into this connector.
SECTION - 27.2
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