GSE 351 User manual

GSE 351
Checkweigher
Reference Manual 1.0

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GSE 351
Reference Manual 1.0

GSE 351 Checkweigher Reference Manual
Copyright © 2000 GSE Scale Systems. All rights reserved.
Published by:
GSE Scale Systems
42860 Nine Mile Road
Novi,MI48375
USA
Information in thisReference Manual is subject to changewithout
notice due to correction or enhancement. The information
described in this manual is solely the property of GSE. No part of
this manual may be reproduced or transmitted in any form or by
any means, electronic or mechanical, including photocopying and
recording and sold for any monetary figure without the express
written permission of GSE.
GSE Locations
GSE Scale Systems
42860 9 Mile Road
Novi,MI48375
U.S.A.
Phone:[phone]
www.gse-inc.com
GSE Canada, Inc.
617 East Lake Road
Airdrie, Alberta Canada T4B 2B8
Phone:[phone]
Fax:[phone]

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Contents
CHAPTER 1: Introduction........................................................................................................1
CONVENTIONS AND SYMBOLS.............................................................................................1
DISPLAY..................................................................................................................................2
LED Display....................................................................................................................2
Annunciators...................................................................................................................2
KEYPAD ..................................................................................................................................3
WEIGH MODE FUNCTIONS...................................................................................................3
SECONDARY FUNCTIONS.......................................................................................................4
SPECIFICATIONS.....................................................................................................................5
Performance ..................................................................................................................5
Electrical.......................................................................................................................5
Operation.......................................................................................................................5
Communication.............................................................................................................5
display...........................................................................................................................5
Enclosure.......................................................................................................................5
Options..........................................................................................................................5
Platform.........................................................................................................................5
CHAPTER 2: Installation ..........................................................................................................7
BENCHTOP MOUNTING.........................................................................................................7
WIRING...................................................................................................................................9
Power Connection..........................................................................................................9
DC Power Connection..................................................................................................9
Serial Port Connection..................................................................................................9
Remote Key Connection..............................................................................................11
Load cell connection....................................................................................................12
CHAPTER 3: Getting Started.................................................................................................13
DEFAULT SETUP ..................................................................................................................13
OPERATION...........................................................................................................................13
Entering a Target Value..............................................................................................14
Entering Tolerances.....................................................................................................17
Status Indication...........................................................................................................18
Counting........................................................................................................................18
Printing out a Ticket....................................................................................................19
CHAPTER 4: Configuration....................................................................................................21
SETUP MODE........................................................................................................................21
Selection Parameters...................................................................................................23
Key-In Parameters........................................................................................................24
PARAMETER MAP ................................................................................................................25
PARAMETER MAP DETAILS................................................................................................27
CUSTOM TRANSMIT SETUP ................................................................................................37
Elements Of A Custom Transmit................................................................................37
Parameters...................................................................................................................38

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ACSII Text ..................................................................................................................38
Control Codes .............................................................................................................38
Writing A Custom Transmit ASCII Text File...........................................................38
Accessing Setup and Clearing Existing Custom Transmit....................................39
Entering ASCII Text.....................................................................................................39
Entering ASCII Control Codes..................................................................................39
Parameter Selection Numbers....................................................................................41
Exiting Setup Mode And Saving Changes................................................................43
TIME/DATE OPERATION.....................................................................................................43
REMOTE KEY OPERATION..................................................................................................45
REMOTE SERIAL OPERATION.............................................................................................46
Display Capture Utility...............................................................................................46
Example #1.................................................................................................................47
Example #2.................................................................................................................47
TARGET AND TOLERANCE SETUP .....................................................................................47
RS-485 MULTI-DROP NETWORK SETUP AND OPERATION..........................................48
Setup...............................................................................................................................48
Operation.......................................................................................................................49
Network Protocol .........................................................................................................49
CHAPTER 5: Calibration........................................................................................................51
SETUP MODE CALIBRATION ..............................................................................................51
FAST CALIBRATION.............................................................................................................51
PERFORMING CALIBRATION..............................................................................................52
Select and Calibration Method and Establish Zero ...............................................52
FirstZero?...................................................................................................................52
LastZero .....................................................................................................................53
False Zero....................................................................................................................54
OnlyZero ....................................................................................................................55
Reset Calibration.........................................................................................................56
Establishing A Span.....................................................................................................58
Exiting Calibration......................................................................................................58
CHAPTER 6: Legal For Trade................................................................................................61
NTEP REQUIREMENTS.......................................................................................................61
OIML REQUIREMENTS.......................................................................................................62
OTHER REQUIREMENTS......................................................................................................62
SEALING ANDAUDIT TRAILS............................................................................................62
Physical Seal.................................................................................................................63
Audit Trails....................................................................................................................64
OIML Audit Trail..........................................................................................................64
Calibration Audit Trail................................................................................................65
SetupAuditTrail.........................................................................................................65
Viewing Audit Trail Parameters .................................................................................65
CHAPTER 7: Model 351 Options...........................................................................................67
RS- 485 NETWORKING.......................................................................................................67
Network Connections...................................................................................................68

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Half-Duplex (2-wire)..................................................................................................69
Full Duplex (4-wire)...................................................................................................69
Both Half Duplex and Full Duplex.............................................................................69
20 MA CURRENT LOOP OPERATION.................................................................................72
Installation....................................................................................................................72
Bi-Directional...............................................................................................................72
Baud................................................................................................................................72
Active/Passive...............................................................................................................72
Isolation .........................................................................................................................73
Max Voltage..................................................................................................................73
Connections...................................................................................................................73
Cable..............................................................................................................................73
Connected Devices.......................................................................................................74
CHAPTER 8: Troubleshooting................................................................................................75
ERROR MESSAGES...............................................................................................................75
Operational Errors.......................................................................................................75
Setup Mode Errors.......................................................................................................76
Hardware Errors..........................................................................................................77
Calibration Errors........................................................................................................77
Communication Errors................................................................................................78
Miscellaneous Errors...................................................................................................78
VIEWING SETUP...................................................................................................................78
INFORMATION MODE PARAMETERS.................................................................................79
A/D CALIBRATION PROCEDURE .......................................................................................81

1
CHAPTER 1: INTRODUCTION
Thank you for selecting the GSE Model 351 Checkweigher. The Model 351
continues the GSE tradition ofExcellence in Weighing Technology. A
properly installed and maintained Model 351 will provide many years of
reliable, accurate performance.
The chapters of this manual focus on various aspects of the indicator:
Chapter 1: Introduction Basic operating information.
Chapter 2: Installation Installation instructions.
Chapter 3: Getting Started Enter a target and tolerance limits.
Chapter 4: Configuration Access the Setup Mode and configure the
indicator to a specific application.
Chapter 5: Calibration Access the Calibration Mode and match the
load sensing device to the indicator.
Chapter 6: Legal-for-Trade Legal-for-trade information.
Chapter 7: Options Available options.
Chapter 8: Troubleshooting Troubleshooting help and error messages.
CONVENTIONS AND SYMBOLS
[ZERO] A keypress appears in bold with brackets.
[PRINT]+[UNITS] ‘+’ indicates keys pressed simultaneously.
Setup Display prompts are bold italic.
Setup ~ Enter ~ =Cal! ‘~’ indicates multi-part display prompts.
Fast ~ Cal! Display prompts can appear in sequence.
First ~ 0? ~ 0.00
!Indicates important considerations.
iProvides additional information.

Model351Checkweigher
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DISPLAY
The M351 displays alpha-numeric data, but due to the nature of 7-segment
LEDs and the limitation of six digits, some information is abbreviated.
All segments and annunciators are illuminated for a brief display test upon
power up. The current gross weight is then displayed in default units.
LED DISPLAY
The LED display is a six digit, 7-segment bright red LED screen with
9 annunciators to show weight and status information. The – (Low
Limit) = Yellow, + (High Limit) = Red and OK (Within tolerance) =
Green. Also there are annunciators for 5 units of measure.
Figure 1: Model 351 LED Display
ANNUNCIATORS
Annunciators provide mode and status information. When illuminated, they
indicate the following conditions:
-(Yellow) Current weight is under the low limit tolerance.
OK (Green) Current weight is within tolerance.
+(Red) Current weight is over the high limit tolerance.
ÚÚ 0ÙÙ Displayed weight is at center-of-zero (±¼ display
graduation).
~Scale is in motion. Motion inhibited transmits will be delayed
until motion ceases.
lb The displayed value is represented in pounds.
oz The displayed value is represented in ounces

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kg The displayed value is represented in kilograms
gThe displayed value is represented in grams
lb oz When both the lband oz annunicators are lit the displayed
value is represented in lb oz.
KEYPAD
Three rigid IP67 sealed buttons are used for operator input. Each key is
assigned two distinct functions. Various key combinations are also used.
Each key has secondary functions, allowing an operator to enter target
values, perform piece samples, access setup parameters, etc.
Figure 2: 351 Function Keys
WEIGH MODE FUNCTIONS
The Model 351 Checkweigher has 3 primary Weigh Mode functions:
[ZERO] Performs a gross zero and selects the gross mode.
[PRINT] Initiates data transmission out the communication port.
[UNITS] Toggles the units of measure between ‘lb’, ‘kg’, ‘oz’, ‘lb’
‘oz’ and ‘grams’.
ZERO
UNITS
PRINT

Model351Checkweigher
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SECONDARY FUNCTIONS
The Model 351 keys perform different functions in the weigh mode, the
setup mode and the calibration mode. Secondary functions for each key
will allow additional tasks to be performed.
Table 1: Key Functions
Key Press Weigh Mode CountMode SetupMode
[ZERO]
Performs a gross
zero function
and/or clears an
entry in progress.
Hold this key on
power-up to turn
onthedisplay
regardlessofP420.
Performs a
quantity zero
function and/or
clears an entry in
progress. From
the sample mode,
returns to the
gross weigh mode.
Exits the Setup Mode
and/or answers “NO”
to query prompts
and/or clears an entry
in progress. Also acts
as a [SELECT] key.
[PRINT /p]
Performs a print
function and/or
‘scrolls’ through
digits during
target or limit
entry.
Performs a print
function and/or
‘scrolls’ through
digits during
target or limit
entry.
‘Scrolls’ through
digits during data
entry.
[UNITS /u]
Toggles between
‘lb’, ‘kg’, grams,
ounces and lb oz
and/or advances
cursor to next
entry position.
Toggles through
standard sample
sizes and/or begins
a new sample
entry.
Advances cursor to
next entry position
and/or cycles
prompts.
[PRINT]+
[UNITS] Access target entry mode. Access target entry mode. Acts as an [ENTER] keypress.
[ZERO]+
[PRINT]
Decrements the
right-most digit
during data
entry.
Decrements the
right-most digit
during sample
entry.
Decrements the right-
most digit during
sampleentry.
[ZERO] +
[UNITS}
Backspace –
erases right-most
digit during data
entry.
Backspace – erases
right-most digit
during data entry.
Backspace – erases
right-most digit
during data entry.
[ZERO]+[PRINT]
+[UNITS] Access the setup mode. Access the setup mode. Exit the setup mode.

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SPECIFICATIONS
PERFORMANCE
Full Scale (F.S.) Selectable 0 to 999,990
Resolution 20-bit A/D converter, 100,000d displayed,
+/- 500,000d internal
A/D Conversion 60 Hz
Zero Track Off – 10d
Zero Range 0-100% of F.S. span
Operating Temperature -10 C to +40 C
Warranty 2 year
Units of Measure kg, lb, grams, lb oz, oz
ELECTRICAL
Power Requirement 90-250 VAC / 12-36 VDC
Excitation Voltage 10 VDC
Signal Input Sensitivity 0.1 – 20 mV/V
OPERATION
Modes Selectable modes such as target, count and HI/LO limits.
Remote Input 1 momentary contact closure (100ms minimum)
Keys 3 buttons for easy of setup and operation
COMMUNICATION
Port 1 RS232 bi-directional serial port. RS485 or 20 mA optional
Data Output String Twenty one (21) selectable fixed-format transmissions available,
1 custom format (programmable via RS232)
Protocol Selectable
Baud Rate 150-9600 bps
DISPLAY
LED Bright RED 6-digit weight display, 0.8” (22mm) height with
9 LED annunciators for operational status: Zero indication,
Motion, High, low, accept and units of operation
ENCLOSURE
With Column Both the enclosure and column are NEMA 4X (IP 66) stainless
steel. Durable enough for washdown environments and cleaning
agents
OPTIONS
RS485 Module Isolated multi-drop with 251 devices max, half or full duplex up to
4000 feet, 9600K bps max
20mA Current Loop Isolated TX-Active or Passive, RX-Passive, 9600 bps max,
12VDC, 1000 feet
Stainless Steel Load Cell includes a stainless steel load cell shield
PLATFORM
10 x10 and 12 x 12 Equipped withShock – Stopper overload and under-load protection.
Open platform design for ease of cleaning

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CHAPTER 2: INSTALLATION
This chapter contains information necessary for proper installation of the
Model 351 Checkweigher. Please review these instructions before installing
your scale.
High voltages may exist within the enclosure. To prevent the risk of
electrical shock, ALWAYS unplug the Model 351 when opening the
enclosure. Installation and servicing of the Model 351 should be performed
only by authorized and qualified service personnel.
For information on installing options, see Chapter 7: Model 351 Options. For
NTEP and OIML details, see Chapter 6: Legal For Trade
!! IMPORTANT! The Model 351 does not include an on/off switch and
therefore must be installed near a power outlet socket that is easily
accessible and in keeping with UL/CSA Safety Standards.
INFORMATION IMPORTANT!Prendre note que les contrôleurs de
serie 351 ne sont pas munis d'interrupteurs "Marche / Arrêt". Par
conséquent, il devront être installés près d'une source d'alimentation secteur
accessible pour demeurer sous les exigences des normes de sécurité
UL/CSA.
BENCHTOP MOUNTING
The Model 351 enclosure and column meet NEMA 4X type specifications.
When choosing a mounting location, make sure the unit is level (a level
bubble is located under the platform shroud) and free from obstructions.
Figure 3: Model 351 with 10x10 platform

Model351Checkweigher
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Figure 4: Model 351 with 10x10 Platform Dimensions
Figure 5: Model 351 with 12x12 Platform Dimensions

Chapter 2: Installation
9
WIRING
POWER CONNECTION
There are two ways to power the Model 351, with a 90-250 Volt line cord
(U.S. Style standard) or with a 12-36 VDC external source.
iThe Model 351 does not include an on/off switch. In keeping with
UL/CSA Safety Standards it must be installed near an easily accessible
power outlet.
DCPOWERCONNECTION
Wire the DC supply to the J3 connector
on the Model 351 main board. Do not
connect pins 3 or 4. The mating
connector can be purchased from a local
electronics supplier. Recommended
connectors are GSE PN: 26-20-3365 (24
AWG) or GSE PN: 26-20-3366 (22
AWG) / AMP PN: 640441-3 (24 AWG)
or AMP PN: 640440-3 (22 AWG).
Connector cover GSE PN: 26-20-3389
or AMP PN: 643075-3.
!! CAUTION: Do not apply AC power through the line cord when a DC
source is attached. When AC is supplied, the voltage at J3 is 24 VDC.
This voltage can damage batteries attached to J3 unless a protection
diode is used to prevent backfeeding.
SERIAL PORT CONNECTION
Before connecting to the serial port, consideration should be given to the
communication protocol and to any remote key requirements. For
information on remote key operation, refer toRemote Key Operation on page
11. Use Table 2to determine proper wiring to the communication port.
Figure 6: DC Power
Connector
Pin 1 Pin 2 Pin 3 Pin 4 Range
DC +-Do not use Do not use 12 - 36 VDC

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Communication connections are made with a pigtailed cable through a strain
relief. The cable should be 20 to 28 AWG with a braided or foil shield for
either model type. The maximum recommended cable length is 50 feet (15
meters). However, much longer connections are possible if using a properly
shielded, low-capacitance cable.
Table 2: Serial Port Connections
Description
REM Remote Key
GND Digital Ground
RXD Receive
RTS Request-to-Send
TXD Transmit
CTS Clear-to-Send
+5V +5 VDC
PI DoNotConnect
GND Digital Ground
Figure 7: : GSE Serial Cable, Part Number 22-30-29752

Chapter 2: Installation
11
A communication cable (P/N: 22-30-29752) may be purchased from
GSE
REMOTE KEY CONNECTION
A remote key may be connected to the Model 351 communication port to
provide remote activation of print or zero functions.
The connection for the remote key input is between pin 1 and pin 2. A two-
conductor shielded cable between 28 and 20 AWG is recommended. The
input requires a contact closure from a push-button switch, a ‘dry’ relay
contact, a photo-eye, and a proximity sensor or other such device. A closure
initiates the operation specified at P800.
!! Do not apply an external voltage to remote key terminals! Only a
contact closure is required to activate the remote key input.
The open circuit voltage across the remote key pins is +5 VDC. A closed
switch will conduct about 0.25 mA. Therefore, a low-voltage switch with
gold-plated contacts is recommended. A Mercury-wetted switch will also
work well. A minimum contact duration of 100 ms is required. Once
invoked, the selected remote key operation will not repeat until the contact is
released and closed again.
Figure 8: Remote Key Connection

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LOAD CELL CONNECTION
The Model 351 will come equipped with either an aluminum or stainless
steel load cell. The load cells used have 7 wires.
+ EX - EX + SIG - SIG + SENSE - SENSE SHIELD
Green Black White Red Orange Blue Wire
When replacing a load cell or main board, be sure to use the proper
connections. The load cell is connected to J8 on the main board. Make sure
the sense jumpers E3 and E4 are set to external (EXT).
Figure 9: Model 351 Load Cell Connector and Sense Jumpers