1
Introduction
The SPL Series Digital Bench Scale, available in
three capacities, is a compact scale with remote
digital indicator. Housed in a standard black
polymer case, the indicator displays its bright
oversize numerals on a large (1") LCD screen.
The base unit features a removable stainless
steel platform, an RS-232 serial communication
port, and adjustable feet for leveling.
The SPL Series uses full duplex RS-232 serial
format for communication with many types of
attached support equipment. The unit can
transmit data on demand, or continuously in
several popular data protocols to match a wide
variety of printers, remote displays, or personal
computers. If you plan to use your scale with
equipment other than a PC, you may have to al-
ter the serial communication parameters which
are embedded in the User Menu.
The User Menu is accessed through the front
panel keys. Complete directions, including a
graphical road map, are found in the Configura-
tion section of the manual.
Installation and Wiring
Unless you wish to interface to a device other
than a PC, no wiring is necessary. Simply con-
nect the indicator to the scale platform, plug in
the AC adapter, and turn the unit on. If the swivel
indicator option was ordered, the stainless steel
post may be mounted to the bottom of the base
with the hardware provided. Alternately, it may
be mounted to a table or bench. In general,
please allow a 20 minute warm up period before
using the scale.
If interfacing to a PC, simply connect the optional
null modem cable to a serial port (e.g. COM 1)
on your PC. If your computer has a 25-pin serial
port, a standard 9-pin to 25-pin adapter, such as
the type used for a mouse, may be used and is
readily available at your local computer supply
retailer.
If interfacing to a serial device other than a PC, you may have to wire
your own cable to communicate with that device. If so, refer to the 9-
pin connector pinout shown at right.
Pin No.
Pin Name
2
Receive Data
3
Transmit Data
5
Signal Ground
9-Pin Connector Pinout
Keyboard Functions
lb
kg
ZERO
NET
GROSS
Toggles between lb and kg
units if this key is enabled in
the User Menu.
Sets indicator to display "0"
when in Gross mode, and
within zero band range.
Toggles between Gross and
Net weight display.
SPL
MODEL
ZERO
kg
lb
GROSS
NET
TARE
kg
NET
GROSS
SPL SERIES FRONT PANEL
TARE
Used to zero a weight indication in Net mode.
