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Model 7050
Bulk Sampling Scale
User’s Manual
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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 present appareil numerique n’emet pas de bruits radioelectroniques
depassant les limites applicables aux appareils numeriques de la Class A
prescrites dans le Reglement sur le brouillage radioelectrique que edicte par le
ministre des Communications du Canada.
EUROPEAN COUNTRIES
WARNING
This is a Class A product. In a domestic environment this product may cause
radiointerference for which the user may be required to take adequate measures.
CAUTION
Risk of electrical shock. Do not remove cover. No user serviceable parts inside.
Refer servicing to qualified service personnel.
Weigh-Tronix reserves the right to change
specifications at any time.
10/01 PN 7424-16620B Printed in USA
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Table of Contents
Table of Contents .................................................................................... i
Specifications ........................................................................................ 1
Introduction ........................................................................................... 3
Unpacking and Preparing the 7050 ....................................................... 3
7050 Description .................................................................................... 4
Front Panel Keys .............................................................................. 4
Hard Keys ................................................................................. 5
Softkeys ..................................................................................... 6
Weighing Operations ............................................................................. 7
Single Piece Weighing .................................................................... 8
Gross Weighing ............................................................................... 8
Net Weighing .................................................................................. 8
Entering a Known Tare Weight ................................................. 9
Removing an Active Tare Weight ............................................. 9
Bulk Sampling Operations ..................................................................... 9
Sampling Overview ......................................................................... 9
Sampling in Dribble Mode ............................................................ 10
Sampling in Bulk Mode ................................................................. 11
Counting While Using a Container ................................................ 12
Entering Numeric Values ............................................................... 12
Reverse Sampling ......................................................................... 12
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Specifications
Capacities and
Resolutions
Power
Operational keys
Annunciators
CapacityCapacity
Capacity
CapacityCapacity
50 lb. .001 lb
50 lb .01 oz
25 kg .0005 kg
800 oz .02 oz
In-line transformer, 115 VAC, 50/60 Hz
Optional 230 VAC, 50/60 Hz
Zero, Tare, Enter, Escape, Clear, 0-9, Decimal
←←
Point,
←,
←←
All keys provide users with tactile and
(configurable) audio acknowledgment when
they are activated.
Display symbols include Stability, Active Tare,
Current Base, Center of Zero, Unit of Measure
and Display Label.
ResolutionResolution
Resolution
ResolutionResolution
→→
→, and 5 Softkeys
→→
Units of measure
Displayed resolution
Internal Resolution
1
Display
Display rate
Time and date
240 x 64 dot matrix LCD display
5" x 1.33" displayable area
7050: Cold cathode fluorescent backlit (white
on blue)
Selectable, 0.1 to maximum readable updates
Pounds, kilograms, ounces, pounds and
ounces
Up to 1 part in 50,000
Battery protected real time clock
Quartzell: 1 part in 2,000,000
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Harmonizer digital filtering
Fully selectable to ignore noise and vibration
Memory
Power saving
Standard input and output
Available options
Operating temperature
Capable of storing one record for recall
including ID #, pieces, weight, pieces per lb.,
and piece weight.
Scale has 2 power-saving timers; one controls
backlight, and another has capability of shutting
the scale off. Any keypress wakes the scale.
Com1: RS-485; used for interfacing with a
remote Quartzell® base.
Com2: RS-232;used for connecting to an Orion
label printer.
• Remote Quartzell scale 3635-300 lb
18" x 18" base
• 230 VAC in-line transformer
• Orion Label Printer
14°F to 104°F (-10°C to 40°C),
10 to 90% RH non-condensing
Dimensions
Weight
Agencies
Warranty
Platform 12" x 14"
Overall 14" W x 17" D x 4.5" H
18.5-lbs.
UL
CE
CUL pending
15 months
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Introduction
This manual explains the operation of the 7050
bulk sampling scale. The 7050 is a computerbased counting scale specifically configured
for bulk mail applications.
This manual explains only the basic application
which ships from the factory and also
assumes all the functions of the scale are
enabled. Your scale has been configured for
your particular application.
This manual is divided into the following main
sections:
• Unpacking and Preparing the 7050
• 7050 Description
• Weighing Operations
• Bulk Sampling Operations
Unpacking and Preparing the 7050
The unit must be
plugged into an
easily accessible
outlet that is earth
grounded and of the
appropriate
voltage.
3
When you receive your 7050, unpack the unit
and save all shipping materials. Remove the
protective plastic from the scale platform.
Place the scale on a level, vibration free
surface. Level the scale with the help of the
bubble level under the scale platform. Turn the
screw feet until the bubble is centered and the
scale does not rock. Tighten the knurled locking
knobs above each foot against the scale base.
Plug the unit into the appropriate power source.
Keep in mind that the power receptacle must
be earth grounded and easily accessible to the
user.
Press any key to activate the scale.
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7050 Description
Figure 1
7050 front panel
To increase the contrast of
the display, press and hold
the CLEAR and 9 keys until
the desired contrast is
reached. To decrease
contrast, press and hold
the CLEAR and 3 keys.
Upon power up, the unit will briefly display
an opening screen, then show the default
display mode. The scale is now ready for
use. After several minutes of inactivity, the
scale will go into a sleep mode. Press any key
to reactivate the scale.
The 7050 is a 12"x 14" scale with an attached
5" x 12" display housing. See Figure 1. The
scale base is cast aluminum enclosing a
QDT® (Quartzell® Digital Technology) weight
sensor and electronics package. The scale
platter is stainless steel.
The display is a 64" x 240" dot matrix which
allows several lines of text and the ability to
display graphics.
There are five softkeys located directly below
the display, a numeric keypad to the right and
six other labeled keys. The keys will be
described in the next section.
Front Panel Keys
Built into the 7050 are two serial ports (Com1
and Com2). Com1 is used for 3635 QDT® base
connection only. Com2 is used for Orion printer
connection only.
The keys on the front panel of the 7050 are of
two types; hard keys and softkeys. Hard keys
are labeled directly and softkey labels appear on
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the display. Softkeys function differently at
different times and their labels change as
needed.
Stable scale icon
Center of zero icon
Hard Keys
Below are brief descriptions for each of the
hard key functions:
ESCAPEESCAPE
ESCAPE
ESCAPEESCAPE
Press the
menus or cancel an entry and return to
gross weight mode.
ZEROZERO
ZERO
ZEROZERO
Press the
reference. When the scale is at zero, ±¼
division, the center-of-zero icon will be
displayed. When the scale is in motion the
stable scale icon will disappear. See note at
left.
TT
AREARE
T
ARE
TT
AREARE
Press the
container or enter an active tare weight. The
display shows net weight. Active on both
local and remote scale.
ESCAPE ESCAPE
ESCAPE key to back out of
ESCAPE ESCAPE
ZERO ZERO
ZERO key to establish a zero
ZERO ZERO
TT
ARE ARE
T
ARE key to zero weight of
TT
ARE ARE
ENTERENTER
ENTER
ENTERENTER
Press the
information, whether numeric characters
that have been keyed in or a choice
displayed while in the menus.
CLEARCLEAR
CLEAR
CLEARCLEAR
Press the
from a displayed number. Repetitive
pressing will clear all digits entered.
0-90-9
0-9 and
0-90-9
Use the numeric keys for entering in
5
numbers or a decimal
ENTER ENTER
ENTER key to accept displayed
ENTER ENTER
CLEARCLEAR
CLEAR key to clear last digit
CLEARCLEAR
..
.
..
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Right ArrowRight Arrow
Right Arrow
Right ArrowRight Arrow
Press this key to acquire second tier of
softkeys.
Left ArrowLeft Arrow
Left Arrow
Left ArrowLeft Arrow
Press this key when in second tier of
softkeys to return to first tier of softkeys
Softkeys
Softkeys are so named because their function is
not set but changes as the programming
directs. Press the
scroll between the two tiers of soft keys.
The softkeys which appear in the 7050 BSS
application are as follows:
First Tier:First Tier:
First Tier:
First Tier:First Tier:
SampleSample
Sample
SampleSample
Press this key to start sample process
Manual Weight EntryManual Weight Entry
Manual Weight Entry
Manual Weight EntryManual Weight Entry
Press this key to manually enter gross
weight from a remote scale or other
source.
UnitsUnits
Units
UnitsUnits
Press this key to change the unit of
measure
Weight per piece entryWeight per piece entry
Weight per piece entry
Weight per piece entryWeight per piece entry
Press this key to manually enter a
known piece weight in decimal pounds
or ounces.
Right Right
Right or
Right Right
Left Arrow Left Arrow
Left Arrow key to
Left Arrow Left Arrow
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Pieces per unit weight entryPieces per unit weight entry
Pieces per unit weight entry
Pieces per unit weight entryPieces per unit weight entry
Press this key to manually enter known
pieces per pound.
Second Tier:Second Tier:
Second Tier:
Second Tier:Second Tier:
Remote ScaleRemote Scale
Remote Scale
Remote ScaleRemote Scale
Connection to 3635-300# only
ID NumberID Number
ID Number
ID NumberID Number
Press this key to manually enter an ID or
job number (up to 16 digits)
PrintPrint
Print
PrintPrint
Press this key to send a formatted
output to a label printer
RECALLRECALL
RECALL
RECALLRECALL
Press this key to recall previous
transaction. Press
the count/weight display.
OFFOFF
OFF
OFFOFF
Press this key to turn the display off.
Pressing any key will turn the scale on.
ESCAPE ESCAPE
ESCAPE to return to
ESCAPE ESCAPE
These keys will be described in more detail as
scale operation is described in the following
sections.
Weighing Operations
The basic unit Model 7050 will operate in the
following manner: After system check, Area A
will indicate a stable condition and center of
zero, Area B will display 0.000 lb. Gross, Area
C will display 0.000 lb. Gross, Area D will be
blank.
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Single Piece Weighing
Place a single piece on the weight platter.
Using the “UNITS” soft key, you can toggle
between 0.001 lb. and 0.01 oz. The weight of
the single piece will be displayed in Areas B
and C.
Gross Weighing
Net Weighing
Follow these steps to perform a gross weighing
operation.
1. With the scale powered up, zero the scale
if the display does not already show zero by
pressing the
Display shows
2. Place the item to be weighed on the scale
platform. . .
Gross weight is displayed.
3. Remove the item and repeat all steps for
the next item.
Follow these steps for performing a net weighing
operation:
1. With the scale powered up, zero the scale
if the display does not already show zero by
pressing the
Display shows
ZERO ZERO
ZERO key. . .
ZERO ZERO
00
0 weight.
00
ZERO ZERO
ZERO key. . .
ZERO ZERO
00
0 weight.
00
2. Place the container to be tared on the scale
platform. . .
Gross weight is displayed.
TT
3. Press the
The weight is tared,
displayed and the tare and net
annunciators appear on the display.
ARE ARE
T
ARE key. . .
TT
ARE ARE
00
0 weight is
00
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4. Place the material to be weighed in the
container. . .
Net weight is displayed.
5. To remove the tare weight from memory,
empty the scale platform and press the
TT
AREARE
T
ARE key. . .
TT
AREARE
Scale returns to gross weighing mode.
Entering a Known
Tare Weight
Removing an Active
Tare Weight
To enter a known tare weight, follow these steps:
1. Key in the known tare weight on the
numeric keypad. . .
When you press a numeric key, the
softkey selections change. One of the
softkeys is
TT
2. Press the
The keyed in value becomes the active
tare weight and the display changes to
net weighing mode.
To remove an active tare weight, empty the
scale platform and press the
00
in
0 on the numeric keypad and press the
00
TT
ARE ARE
T
ARE softkey. The display returns to gross
TT
ARE ARE
weighing mode.
ARE ARE
T
ARE softkey. . .
TT
ARE ARE
Bulk Sampling Operations
TT
AREARE
T
ARE.
TT
AREARE
TT
ARE ARE
T
ARE key or key
TT
ARE ARE
Sampling Overview
9
To perform a bulk sampling operation the first
step is to obtain the average weight of each
piece or the piece weight, abbreviated as pcwt.
You can key in a known piece weight or obtain a
piece weight by sampling.
Sampling consists of placing a known number
of pieces on the scale and letting the scale
determine the individual piece weight. The
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scale uses this to determine the count of pieces
placed on the scale. The piece weight is kept in
memory until a new sample is taken.
You can sample using the bulk or dribble
FF
modes.
This can be changed to bulk mode in
configuration.
In dribble mode the scale prompts you to place
the sample pieces on the platform one at a
time, or all at one time, and when you are done,
press the
piece weight and puts the display into the count
mode. This allows you to count out pieces onto
the platform.
In bulk mode you are prompted to place a
specific number of pieces on the scale all at
one time. After motion ceases the scale
automatically calculates the piece weight and
goes into the count mode. This means you must
have the counted pieces or sample ready to
place on the scale all at once.
actory default is dribble modeactory default is dribble mode
F
actory default is dribble mode.
FF
actory default is dribble modeactory default is dribble mode
ENTER ENTER
ENTER key. The scale calculates the
ENTER ENTER
Sampling in Dribble Mode
Follow these steps to perform a sampling
operation using the dribble mode:
1. Press the SAMPLE softkey. . .
The scale zeroes itself and the display
prompts:
in a sample size larger than 10,in a sample size larger than 10,
in a sample size larger than 10,
in a sample size larger than 10,in a sample size larger than 10,
press ENTER. Sample Size = 10.press ENTER. Sample Size = 10.
press ENTER. Sample Size = 10.
press ENTER. Sample Size = 10.press ENTER. Sample Size = 10.
Ten is the default sample size.
Minimum sample size can be changed
in configuration.
Load 10 samples or keyLoad 10 samples or key
Load 10 samples or key
Load 10 samples or keyLoad 10 samples or key
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or
key in a new sample size larger than 10.
Press the ENTER key, then count out the
new sample amount onto the scale and
press ENTER. . .
The display shows
computing piece weightcomputing piece weight
computing piece weight; then the
computing piece weightcomputing piece weight
display shows the weight, count,
weight per piece, and pieces per
weight.
3. Place items to be counted on the scale. . .
Count and weight are displayed.
4. Repeat step three until you are done with all
identical identical
identical items.
identical identical
StandbyStandby
Standby
StandbyStandby
. . .. . .
. . .
. . .. . .
Sampling in Bulk Mode
Follow these steps to perform a sampling
operation using the bulk mode:
1. Press the
2. Place all the items on the scale
or
key in a new sample size larger than 10,
press the
new sample amount onto the scale. . .
SAMPLE SAMPLE
SAMPLE softkey. . .
SAMPLE SAMPLE
The scale zeroes itself and the display
prompts you to:
key in a sample size from 11 tokey in a sample size from 11 to
key in a sample size from 11 to
key in a sample size from 11 tokey in a sample size from 11 to
999. Sample Size = 10999. Sample Size = 10
999. Sample Size = 10. Ten is the
999. Sample Size = 10999. Sample Size = 10
default sample size. Minimum sample
size can be changed in configuration.
ENTER ENTER
ENTER key, then count out the
ENTER ENTER
The display shows
computing piece weightcomputing piece weight
computing piece weight, then the
computing piece weightcomputing piece weight
display shows the weight, count,
weight per piece, and pieces per
weight.
Load 10 samples orLoad 10 samples or
Load 10 samples or
Load 10 samples orLoad 10 samples or
StandbyStandby
Standby
StandbyStandby
. . .. . .
. . .
. . .. . .
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3. Place items to be counted on the scale. . .
Count and weight are displayed.
4. Repeat step three until you are done with all
identical identical
identical items.
identical identical
The display will then show “COUNT” in Area C,
weight in Area B, and show lb./pcwt and pcs
per lb. in Area D. Note that the weight shown in
Area B will indicate Gross weight, even though
a container weight might have been nulled
during the sample acceptance procedure. Net
weight will only be designated if a specific tare
value is entered.
By pressing the “UNITS” key, the metrological
display values will change to pounds and
ounces; piece weight will be expressed in
ounces and pieces per weight in pounds.
As pieces are added to the weight platter, the
count and weight will change accordingly. The
information in Area D will remain the same.
Counting While
Using a Container
Entering Numeric Values
To perform a count while using a container,
place the container on the scale and press the
SAMPLE key. The scale automatically zeroes
and the scale is ready for bulk or dribble
sampling as described in the previous sections.
The 7050 will allow entry of numeric values for
manual weight (Man. Wt), piece weight (lb/
PCWT), pieces per pound (PC/lb), or ID number
(ID No.). Press one of these softkeys then enter
the numeric value to that function. The display
returns to normal operating mode with the value
active.
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Reverse Sampling
You can determine the entire count of a
container without emptying the container. This is
called reverse sampling. If at this time, a loaded
container with a predetermined tare value is
placed on the weight platter, the tare value can
be entered, by keying in the value on the 0-9
keyboard. The value of tare will be displayed in
area D until the “TARE” SOFT key is pressed. At
that time, the tare value will be subtracted from
the gross weight shown in Area B. The resulting
weight will be shown as NET, and the status
window, Area A, will show a Predetermined
Tare symbol. The tare equivalent count will be
subtracted from the Count display. To delete
“TARE,” empty the scale and press the “TARE”
key. Works on local and remote base.
To proceed with sampling on local scale, press
“SAMPLE.” Remove the number of pieces
required by the scale, then place the same
number back on scale and press enter. The
scale will then compute correct weight per
piece and pieces per weight.
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Notes
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1000 Armstrong Drive
Fairmont, MN 56031 USA
Telephone: 507-238-4461
Facsimile: 507-238-4195
E-mail: service @wt-nci.com
www.wt-nci.com
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