Cooper Instruments & Systems DFI 250X Digital Weight Indicator - Manual (Page 5)

CF 147 1 version 1.1
1.0 INT RODUCTION
This instrument is a precision digital indicator using the latest Sigma-Delta A/D technology to ensure fast and
accurate weight readings.
The setup and calibration of the instrument are digital, with a non-volatile security store for all setup parameters.
The instrument may be operated from either 4 AA batteries or a DC power source from 12V to 24V. There is a soft
power on/off function that retains memory of its state. Once an instrument is turned on it will automatically start up
again if the external power is interrupted.
The instrument is fitted with GSE-LINK communications as standard. This allows a temporary isolated
communications link to be established with a PC and enables software upgrades and the use of computerized
setup and calibration via the Viewer software. Refer to GSE-LINK (Optional) section 3.10 for more information.
Figure 1: Weight Indicator
1.1 Overview
This instrument provides the ZERO and TARE functionality as well as providing more setup options (e.g. serial and
setpoints) and printing functionality.
It also supports special functions (e.g. peak-hold, live weight (livestock) averaging, counting, etc.), via the user
definable key. It is equipped with an NVRAM store to ensure day-to-day operating settings (e. g.
ZERO, TARE, CLOCK, etc.), are retained when power is removed.
This instrument has two isolated transistor outputs with status display on the front panel as well as the RS-232
communications port that can be used for printer driving or connection to a remote display or PC. There is a built-in
clock for date-stamping printed outputs.
1.2 Approvals (for trade versions only)
•
NSC approval (4000 divisions at 0.8µV/division).
•
NMI approval (4000 divisions at 0.8µV/division).
•
C-tick approved and CE approved.
1.3 The Manuals Set
This manual is part of a set of manuals covering the setup and operation of the instrument. The set includes the
following:
•
Technical Reference Manual - Contains detailed information on calibration and setup. This manual is intended
for use by Scale Technicians who are installing the instrument.
•
User’s Guide - Aimed at the operation of the instrument, and covers the day-to-day operation of the
instrument.
•
Quick Start Manual - Intended for Scale Technicians who are familiar with the instrument and simply need a
quick reference to menu options and connection diagrams, etc.
1.4 Document Conventions
The following document conventions (typographical) are used throughout this Reference Manual.