Avery Weigh-Tronix 7820-50, 7820-70, 7820-74, 7880-50, 7880-75 User Instructions
...
Model 7800 Family
Weight Classifiers
User Instructions
AWT35-501540
Issue AA
Avery Weigh-Tronix is a trademark of the Illinois Tool Works group of companies whose ultimate parent company is
Illinois Tool Works Inc (“Illinois Tool Works”). Copyright © 2016 Illinois Tool Works. All rights reserved.
No part of this publication may be reproduced by making a facsimile copy, by the making of a copy in three dimensions of a two-dimensional
work and the making of a copy in two dimensions of a three-dimensional work, stored in any medium by electronic means, or transmitted in
any form or by any means, including electronic, mechanical, broadcasting, recording or otherwise without the prior written consent of the
copyright owner, under license, or as permitted by law.
This publication was correct at the time of going to print, however Avery Weigh-Tronix reserves the right to alter without notice the
specification, design, price or conditions of supply of any product or service at any time.
7800family_u_en_501540.book Issue Draft of AA
Table of Contents
page
Table of Contents ...................................................................................................................................... 3
Chapter 1 General information and warnings ......................................................................................... 5
About this manual ..............................................................................................................5
Text conventions ......................................................................................................... 5
Special messages ....................................................................................................... 5
Installation .......................................................................................................................... 6
Electrical installation .......................................................................................................... 6
Pluggable equipment ................................................................................................... 6
Wet conditions ............................................................................................................. 6
Routine maintenance ......................................................................................................... 7
Cleaning the machine ........................................................................................................ 7
Training .............................................................................................................................. 7
FCC and EMC declarations of compliance ........................................................................ 8
Chapter 2 Specifications ........................................................................................................................... 9
Chapter 3 Initial Setup ............................................................................................................................. 12
Unpacking the Scale ........................................................................................................ 12
Installing the Scale ...........................................................................................................12
Chapter 4 Operation ................................................................................................................................ 14
Power Up Test Sequence ................................................................................................ 14
Performing a Normal Weighment ..................................................................................... 14
Operation Controls ........................................................................................................... 15
Chapter 5 Accessing the Menu Mode .................................................................................................... 16
Accessing the Gravity Mode ............................................................................................ 16
Menu Mode ......................................................................................................................16
Gravity Mode .................................................................................................................... 18
Alternative Calibration Points ........................................................................................... 18
Baud Rate and Parity Options ......................................................................................... 19
Diagnostic (DIAG) Mode .................................................................................................. 19
Configuration Mode .......................................................................................................... 23
Print Modes ...................................................................................................................... 25
Calibration Mode .............................................................................................................. 26
Step-by-Step Instructions for CAL Mode ................................................................... 26
Gravity Mode .................................................................................................................... 27
Re-Calibration Mode ........................................................................................................ 28
Step-by-Step Instructions for RE-CAL mode ............................................................. 28
Review/Test Scale Settings ............................................................................................. 29
Chapter 6 Communication ...................................................................................................................... 31
Communications Enabled ................................................................................................ 32
Interface Cable Specifications ......................................................................................... 33
NCI Serial Communications Protocol ............................................................................... 33
Standard Commands ....................................................................................................... 33
Optional Commands ........................................................................................................ 34
Chapter 7 Error Codes and Troubleshooting ........................................................................................ 35
Troubleshooting ............................................................................................................... 35
Chapter 8 Spare parts ............................................................................................................................. 38
7800 Family User Instructions 3
4 7800 Family User Instructions
1 General information and warnings
1.1 About this manual
This manual is divided into chapters by the chapter number and the large text at the top
of a page. Subsections are labeled as shown by the 1.1 and 1.1.1 headings. The
names of the chapter and the next subsection level appear at the top of alternating
pages of the manual to remind you of where you are in the manual. The manual name
and page numbers appear at the bottom of the pages.
1.1.1 Text conventions
Key names are shown in bold and reflect the case of the key being described. This
applies to hard keys and on-screen or soft keys.
Displayed messages appear in bold italic type and reflect the case of the displayed
message.
1.1 Text conventions
1.1.2 Special messages
Examples of special messages you will see in this manual are defined below. The
heading words have specific meanings to alert you to additional information or the
relative level of hazard.
ELECTRICAL WARNING!
THIS IS AN ELECTRICAL WARNING SYMBOL.
ELECTRICAL WARNINGS MEAN THAT FAILURE TO FOLLOW
SPECIFIC PRACTICES OR PROCEDURES MAY RESULT IN
ELECTROCUTION, ARC BURNS, EXPLOSIONS OR OTHER HAZARDS
THAT MAY CAUSE INJURY OR DEATH.
CAUTION!
This is a Caution symbol.
Cautions give information about procedures that, if not observed, could result
in damage to equipment or corruption to and loss of data.
NOTE: This is a Note symbol. Notes give additional and important information, hints
and tips that help you to use your product.
7800 Family User Instructions 5
1.2 Installation
DANGER: RISK OF ELECTRICAL SHOCK. NO USER SERVICEABLE
PARTS. REFER TO QUALIFIED SERVICE PERSONNEL FOR SERVICE.
CAUTION: Installation, configuration, and servicing are only to be done by
qualified service personnel as authorized by Avery Weigh-Tronix.
1.3 Electrical installation
CAUTION: The power cable must be connected to an earth-grounded electrical
outlet. The electrical supply must have a circuit breaker with an appropriate
rating to protect from over-current conditions.
For your protection, all electrical (110V or 230V) equipment used out of doors or
in wet or damp conditions should be supplied from a correctly fused power
source and protected by an approved ground fault protection device (RCD,
GFCI etc.)
IF IN DOUBT SEEK ADVICE FROM A QUALIFIED ELECTRICIAN.
1.3.1 Pluggable equipment
Pluggable equipment must be installed near an easily accessible socket outlet.
1.3.2 Wet conditions
Under wet conditions, the plug must be connected to the final branch circuit via an
appropriate socket / receptacle designed for washdown use.
Installations within the USA should use a cover that meets NEMA 3R specifications
as required by the National Electrical Code under section 410-57. This allows the unit
to be plugged in with a rain tight cover fitted over the plug.
Installations within Europe must use a socket which provides a minimum of IP56
protection to the plug / cable assembly. Care must be taken to make sure that the
degree of protection provided by the socket is suitable for the environment.
6 7800 Family User Instructions
1.4 Routine maintenance
IMPORTANT: This equipment must be routinely checked for proper operation
and calibration.
Application and usage will determine the frequency of calibration required for
safe operation.
Always turn off the machine and isolate from the power supply before starting any
routine maintenance to avoid the possibility of electric shock.
Make sure that it is placed securely on a flat and level surface.
1.5 Cleaning the machine
Table 1.1 Cleaning DOs and DON’Ts
DO DO NOT
1.4 Wet conditions
1.6 Training
Wipe down the outside of standard products
with a clean cloth, moistened with water and
a small amount of mild detergent
Spray the cloth when using a proprietary
cleaning fluid
Do not attempt to operate or complete any procedure on a machine unless you have
received the appropriate training or read the instruction books.
To avoid the risk of RSI (Repetitive Strain Injury), place the machine on a surface which
is ergonomically satisfactory to the user. Take frequent breaks during prolonged usage.
Attempt to clean the inside of the machine
Use harsh abrasives, solvents, scouring cleaners or
alkaline cleaning solutions
Spray any liquid directly on to the display windows
7800 Family User Instructions 7
1.7 FCC and EMC declarations of compliance
United States
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
Canada
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio
Interference Regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de
la Classe A prescrites dans le Règlement sur le brouillage radioélectrique edicté par le ministère des Communications du Canada.
European Countries
WARNING: This is a Class A product. In a domestic environment, this product may cause radio interference in which the user may be
required to take adequate measures.
8 7800 Family User Instructions
2 Specifications
Description
The NCI 7800 models are digital electronic parcel bench scales specifically designed
for shipping applications and are Legal-for-Trade. The scales have built-in intelligence
that enables them to be easily interfaced with a computer or other data-processing
device.
Capacity/Resolution
Model Capacity (lb) Capacity (kg) n(max)
7820-50
7820-70
7820-75
7880-50
7880-75
7880-125
7880-150
7885-75 150 x 0.05 lb 75 x 0.02 kg 3750d
7829-125 250 x 0.05 lb 100 x 0.02 kg 5000d
7840-125
7840-150
7824-125
7824-150
100 x 0.02 lb
150 x 0.05 lb
150 x 0.02 lb
100 X 0.02 lb
150 x 0.05 lb
250 x 0.05 lb
300 x 0.1 lb
250 x 0.05 lb
300 x 0.1 lb
250 x 0.05 lb
300 x 0.1 lb
50 x 0.01 kg
60 x 0.02 kg
75 x 0.01 kg
50 x 0.01 kg
75 x 0.02 kg
100 x 0.02 kg
150 x 0.05 kg
100 x 0.02 kg
150 x 0.05 kg
100 x 0.02 kg
150 x 0.05 kg
5000d
3000d
7500d
5000d
3750d
5000d
3000d
5000d
3000d
5000d
3000d
Agency Certificates of Conformance
If unit is to be used as a commercial device, all local reporting and registration
requirements must be followed.
Model 7820
United States: NTEP #95-070
Canada: Ministry of Industry #AM-5076
For use as a Class III device from +5°C through +40°C
Model 7885
United States: NTEP #02-069
Canada: Ministry of Industry (#AM-5507)
For use as a Class III device from +5°C through +40°C
Models 7824, 7829, 7840, 7880
United States: NTEP #95-121
Canada: Ministry of Industry #AM-5099
For use as a Class III device from +5°C through +40°C
7800 Family User Instructions 9
Dimensions
Model 7820: 14" L x 12.5" W x 4.1" H
Model 7880: 18" L x 18" W x 4.6" H
Model 7885: 18" L x 18" W x 3.0" H
Model 7829: 20" L x 20" W x 5.3" H
Model 7840: 18" L x 24" W x 4.6" H
Model 7824: 24" L x 24" W x 4.6" H
Power Supply
UL/CSA approved in-line power supply with 6’ line cord. (7885 uses wallmount style)
Input:120 VAC +10%-15%, Standard 3 wire w/ground
Output:15 VDC @.3 Amps DC
Frequency
60 Hz Standard
Power Requirements
0.1 amp maximum
Operating Temperature
42ºF – 104ºF (5ºC – 40ºC)
10% to 95% RH (non-condensing)
Construction
Model 7820: Die cast aluminum base with a stainless steel weigh platter.
Overload protection: Adjustable center stop, fixed corner stops.
Model 7885: Painted mild steel base with stainless steel weigh platter.
Overload protection: Fixed center and corner stops.
Models 7824, 7829, 7840, 7880: Painted mild steel base with stainless steel weigh
platter. Overload protection: Adjustable center and corner stops.
Display
½" high, six-digit LCD. Internal display standard on all models except 7885 (remote
only)
Key panel with ZERO and TEST keys.
Optional remote display with 7 ft. cable.
Scale Leveling
Level bubble located under weigh platter. Adjustable feet in each corner to level the
scale.
10 7800 Family User Instructions
Zero Window
Initial automatic zero setting is ±10% of maximum capacity—active at power up.
Manual zero setting range is ±2% of maximum capacity—active using the ZERO key.
Under Capacity Limits
Under capacity indication will be given with dashes appearing on the bottom line of the
display whenever the display is more than 2 percent below the initial zero value.
Over Capacity Limits
Over capacity indication will be given with dashes appearing in the upper line of the
display whenever the weighed item exceeds 9 divisions over the rated capacity of the
unit. The scale will use the Initial zero value for reference for over capacity
determination.
Sealing
Access to the calibration switch can be secured with a lead wire or pressure sensitive
security seal. The remote and primary indicators have no metrological features that
require the use of a security seal.
Internal Counts
The scale has 100,000 internal counts.
Dynamic Response
The time from when weight is applied to the scale until a stable weight display is
displayed:
0–1000d 1.5 seconds
1000d+ 2.0 seconds
maximum mean average
Communications
Factory default settings: 9600 baud, 7 data bits, even parity, 1 stop bit.
Standard 9-pin pass through RS232 interface cable included. Not a null modem.
RS232 bidirectional, configurable 1200 to 19.2K baud. Transmits weight and scale
status whenever ASCII “W” <CR> is sent by a remote device.
USB VCP
USB HID
Only one of these three interface devises (RS232, USB VCP or USB HID) can be used
from the scale at a time.
7800 Family User Instructions 11
3 Initial Setup
3.1 Unpacking the Scale
1. Remove contents of the shipping container.
2. Inspect the scale for evidence of shipping damage. Immediately report any
damage to the shipper.
3.2 Installing the Scale
1. Mount the scale on a stable, level surface that is free from air currents and
vibration. Be sure the scale platter does not touch any adjacent surfaces.
2. To install the scale surface flush with a countertop, use the dimensions on the
following page to guide construction.
Model 7820
Scale Dimensions Min. Cut-Out Dimensions
D 12.5 in. (31.7 cm)13.25 in. (33.7 cm)
W 14 in. (35.6 cm)14.75 in. (37.5 cm)
H 4.1 in. (10.4 cm)*
*Adjustable to 4.6 in. (11.7 cm)
Model 7880
Scale Dimensions Min. Cut-Out Dimensions
D 18 in. (45.7 cm)18.75 in. (47.6 cm)
W 18 in. (45.7 cm)18.75 in. (47.6 cm)
H 4.6 in. (11.6 cm)*
*Adjustable to 5.1 in. (12.9 cm)
Model 7885 (RS232 only)
Scale Dimensions Min. Cut-Out Dimensions
D 18 in. (45.7 cm)18.75 in. (47.6 cm)
W 18 in. (45.7 cm)18.75 in. (47.6 cm)
H 3.0 in. (7.6 cm)*
*Adjustable to 3.5 in. (8.9 cm)
Model 7829
Scale Dimensions Min. Cut-Out Dimensions
D 20 in. (50.8 cm)20.75 in. (52.7 cm)
W 20 in. (20.8 cm)20.75 in. (52.7 cm)
H 5.3 in. (13.5 cm)*
*Adjustable to 5.8 in. (14.7 cm)
12 7800 Family User Instructions
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