This publication is provided solely as a guide for individuals who have received Toledo
Technical Training in servicing the Toledo product.
Information regarding Toledo Scale technical training may be obtained by writing to:
Toledo Scale
Training Center
P.O. Box 1705
Columbus OH 43216
(614) 438-4400
FCC NOTE
This equipment has been tested and found to comply with the limits of the United States of
America FCC rules for a Class A digital device, pursuant to Part 15 of the FCC Rules and
the Radio Interference Regulations of the Canadian Department of Communications.
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.
IMPORTANT
It is most important that the correct part number is used when ordering. Part orders are
machine processed, using only the part number and quantity as shown on the order.
Orders are not edited to determine if the part number and description agree.
TOLEDO SCALE RESERVES THE RIGHT TO MAKE
REFINEMENTS OR CHANGES WITHOUT PRIOR NOTICE
PRECAUTIONS
•
•
•
•
this manual before operating or
READ
servicing this equipment.
ALWAYS REMOVE POWER
seconds
disconnecting any internal harnesses.
Failure to observe these precautions may
result in damage to, or destruction of the equipment.
ALWAYS
DO NOT
scale base to the equipment with power
connected or damage will result.
BEFORE
take proper precautions when handling static sensitive devices.
connect or disconnect a load cell
and wait at least 30
connecting or
WARNING
DISCONNECT A LL P OW E R
TO THIS UNIT BEFORE
REMOVING THE FUSE
OR SERVICING.
WARNING
ONLY PERMIT QUALIFIED PERSONNEL TO
SERVICE THIS EQUIPMENT. EXERCISE CARE
WHEN MAKING CHECKS, TESTS, AND
ADJUSTMENTS THAT MUST BE MADE
WITH POWER ON.
•
•
•
•
this manual for future reference.
SAVE
DO NOT
tamper with this equipment.
ALWAYS DISCONNECT
power source before servicing.
CALL
information, and service.
allow untrained personnel to operate, clean, inspect, maintain, service, or
this equipment from the
METTLER TOLEDO for parts,
CA UTION
OBSERVE PRECAUTIONS
FOR HANDLING
ELECTROSTATIC
SENSITIVE DEVICES
Table of Contents
1. GENERAL DESCRIPTION
1.1. STANDARD FEATURES..................................................................................................................................... 1
2.2.1. Bar Code.................................................................................................................................................... 3
3.1.1. Power Requirements ................................................................................................................................. 5
3.1.2. Conducted and Radiated Emissions ......................................................................................................... 5
3.1.3. Radio Frequency Interference ................................................................................................................... 5
3.2.1. Temperature Specification......................................................................................................................... 6
3.2.2. Hazardous Areas ....................................................................................................................................... 6
3.3.1. Appearance and Dimensions..................................................................................................................... 6
3.4. DATA INTERFACE............................................................................................................................................... 7
3.4.1. Data Output................................................................................................................................................ 7
3.4.2. Data Input................................................................................................................................................... 7
4.1. UNPACKING AND SETUP.................................................................................................................................. 9
4.1.2. Level the Scale Base ................................................................................................................................ 10
4.1.3. Install All Optional KOPs........................................................................................................................... 10
4.1.4. Initial Power Up Sequence........................................................................................................................ 10
6.1.1. Data Format............................................................................................................................................... 47
7.3. POWER SUPPLY VOLTAGE CHECKS ............................................................................................................ 55
7.3.1. External Power Supply.............................................................................................................................. 55
8.4. PCBs AND TOP COVER.................................................................................................................................... 68
8.5. INTERIOR OF BASE .......................................................................................................................................... 69
The Toledo Scale DigiTOL® Model 8572 Parts Counting Scale is a high resolution scale designed f or use in m ost
industrial environments. The 8572 can be used with one analog or DigiTOL® remote scale base, offer ing f lexibility
and consistently accurate parts counting perfor mance.
HAZARDOUS by the National Electric Code (NEC) because of combustible or explosive atmospheres, or in
areas that contain extreme dust, moisture, or corrosive materials.
1.1. STANDARD FEATURES
6
Internal Toledo® DigiTOL® load cell in 5, 10, 25, 50, and 100 lb capacities with one part in 500,000 internal
resolution.
6
Low power LCD (Liquid Crystal Display) with programmable cursors and two, six digit displays for weight data
and counting information.
6
20 position sealed polycarbonate keyboard with embossed edges and tactile feedback.
6
Bidirectional RS-232 serial port for printer or com puter interfac ing with single character ASCII input f or rem ote
print, tare, clear, zero, and accumulator functions.
6
Low power CMOS circuitry to maximize optional battery life.
6
12 VDC 0.6 A wall transformer to power the standard 8572.
The 8572 MUST NOT be used in areas classified as
6
Automatic Average Piece W eight (APW ) enhancement. If select ed, the 8572 automatically recalculates the
APW continuously up to 4% of scale capacity.
6
Selectabl e sample si ze.
6
Pushbutton zeroing (±2% or ±20% of scale capacity) with automatic zero maintenance.
6
Independent or dependent modes of counting operation.
6
A 16 digit ID for transaction identification.
6
A single register accumulator for weight or count data.
6
A resetable consecutive number register that increments every time an accumulation is performed.
6
All setup parameters and scale operating features including calibration are easily configured through the
standard keyboard.
1.2 OPTIONAL FEATURES
6
12.5 VDC 1.5 A wall mount transformer is required to power the 8572 if any optional equipment is installed in
the 8572.
6
Input for one DigiTOL® or analog scale base, with 1 part in 500,000 internal resolution.
6
Bar code input by means of a hand held wand or scanning gun.
6
Internal and/or external batteries for applications requiring operation without AC power.
1.3. STATEMENT OF PERFORMANCE
The performance of any count-by-weighing scale is dependent on uniformity of piece weight, the number of
pieces in the sample, the weight of an individual piece and the per cent of rated load plac ed on the scale for a
sample. Count accuracy is also dependant upon correct operation of the scale.
The 8572 high resolution parts counting scale significantly reduces count errors caused by the operator. In
most applications, it provides better practical accuracy than either hand counting or other mechanical
techniques. W ith the proper scale selection, c ount accuracy of ± one piece is attainable. However the most
significant variable is non-uniformity in the weight of the parts to be counted; this variable is beyond the contr ol
of the scale.
1.4. ACCURA CY CONSIDERATIONS
Counting accuracy is determined prim arily by two factors: Sample size as a percentage of full sc ale capacity
and variation in weight from piece to piece of the parts to be counted.
The first factor is the most f requent cause of counting inac curacy because of the user's des ire to hand count
the minimum possible num ber of sample pieces. Using too s mall a sample size results in limited accuracy.
For example, with a sample weight equal to 0.05% of full scale c apacity, the internal sample weight resolution
is ±1 part in 250, therefore counting acc uracy will be limited to ±0.4% in this example. Use of a sample size
that is a higher percentage of full scale capacity will result in improved counting accuracy.
The overall count accuracy can be severely affected if the pieces used for the sample are not truly
representative of the average piece weight. The sec ond factor is not under the control of the par ts counting
scale, but this factor can be m inimized by using the largest practical sam ple size possible and resampling
when counting different lots of the same material.
2
2. SYSTEM DESCRIPTION
The 8572 Logic PCB provides a DC voltage to the digital load cell which responds with numeric values proportional
to the weight applied to the platter. This weight information is then used to determine the average piece weight and
corresponding piece count. Setup parameters and calibration are ac ces sible via the fr ont k eyboard, so no internal
access is required to configure the 8572. Setup and calibration data is stored in non-volatile m emory to prevent
memory loss from occurring during a power outage.
2.1. INTERNAL FUNCTIONS
The basic 8572 consists of four major components. These are:
DigiTOL® Load Cell
6666
the Logic PCB.
Logic PCB -
6666
the keyboard, communic ates with the DigiTOL® load cell, dr ives the display PCB, pr ovides a bidir ectional
RS-232 serial printer port, and supplies connections for optional accessories.
Keyboard -
6666
covered with an embossed polycarbonate overlay that provides ridges to separate active key areas. The
functions available are tare entry, sample or APW entry, numeric ID entry, clearing of data, printing,
zeroing of the scale, scale selection, recall access and setup selection.
Display PCB
6666
display weight or count information. Six, 0.44" (11 mm) high, seven-segm ent digits display net weight,
percentage of accuracy, consecutive num bering, average piece weight, or total counts. The LCD dis play
also provides low battery and status symbols and eight programmable cursors to indicate display or
operating mode.
Contains the power supply and logic circuitry required to operate the scale. This PCB scans
The sealed membrane, four by five matrix k eyboard with domed keys for tactile feedback , is
- Contains the LCD (liquid crystal display). Six, 0.7" (18 mm ) high, seven- segm ent digits
- A single point loading, high resolution load cell that c ommunic ates weight data to
2.2. OPTIONAL KITS
The standard 0.6 A, 12 VDC power supply (*135156 00A), MUST be replaced with the optional 1.5 A, 12.5
VDC power supply (*135693 00A) when any optional KOP is installed in the Model 8572.
2.2.1. Bar Code
Scanning of bar code data can accomplished by means of the bar code wand kit or the bar c ode s canning
gun kit. The 8572 can read Code 39, Interleaved 2 of 5, or Codabar form at bar code data. Tare, APW ,
and up to 16 digits of alphanumeric ID c an be scanned into the 8572. The 8572, when coupled with the
Model 8860 thermal printer, can print up to six lines of bar code and/or human readable data on an
adhesive label in a variety of formats.
2.2.2. Remote Scale Input
The 8572 remote scale input provides 1 part in 500,000 resolution and approx im ately nine weight updates
per second. The 8572 can accommodate one remote scale base of either the DigiTOL® or analog type.
The remote DigiTOL® scale PCB is com patible with all Toledo Scale DigiT OL® scale bas es including the
Model 2157 floor scale (digital j-box), also referred to as DigiTOL® POWER MODULE. The remote
analog scale PCB can supply excitation voltage for up to four 350 ohm load cells and is com patible with
both 2 mV/V and 3 mV/V analog load cells.
NOTE: The 8572 requires that four load cells be used with the digital j-box. The Model 2157 floor scale (digital
j-box) provides up to 1 part in 280,000 resolution.
2.2.3. Battery Power Operation
3
2.2.3.1. Battery Powered Operating Time
The internal battery kit allows operation of the 8572 when AC power is not available. The internal
battery provides up to 8 hours of power. The battery can be removed by means of an access cover
located on the back of the 8572. T he normal rec harge time is approximately 12 hour s with the 8572
turned off. The exter nal battery pack provides up to 32 hours of power and is easily replaced with a
freshly charged external battery pack for applications requiring extended use without AC power. T he
normal battery recharge time is approximately 16 hours with the 8572 turned off.
Table 2-1 Recommended Battery Powered Operating Time With Example Configurations
2.2.3.2. Battery Service Life Considerations
Battery service life is a major f ac tor in es timating the maximum operating tim e of a c harged battery.
The internal and external battery options use a lead/acid "gel" cell type of battery that is similar to
an automobile battery.
completely discharged on a repetitive basis
deeply a battery is routinely discharged and how many times the battery can be recharged. A
battery is considered to have exceeded its working lif e when the fully charged capacity is less than
50% of the original rated capacity. Refer to Table 2-1.
No other
Options Installed
Remote DigiTOL® Scale
Bar Code KOP
Lead/acid batteries lose charge capacity more quickly if they are
. There is an inverse relationship between how
Remote Analog Scale Base
(4-350 Α Load Cells)
To maximize the working life of a
battery, recharge the battery on a the
basis of how many hours the scale has
been in use rather than running until the
8572 powers itself down. If a particular
scale configuration results in a
maximum battery charge life of 24
hours before the battery is exhausted,
then the battery pack should normally
be used for 8 hours and then
recharged. Extra battery packs and an
external battery charger are available to
permit continuous battery powered
operation. Following this procedure will
greatly increase the service life of the
battery and prevent premature battery
failure.
a battery at temperatures above 860 F (300 C) shortens service life considerably.
Figure 2-1 Number of Recharge Cycles Related to Battery Discharge Depth
Always recharge batteries after use. Batteries stored in a discharged state may refuse to take a
charge.
Storing batteries at 500 F (100 C) or below extends shelf life before recharging is necessary.
Batteries should be recharged every six months of s torage (when stored at room temperature) .
3. SPECIFICATIONS
4
Operating and storage conditions also
influence battery service life. Operating
3.1. ELECTRICAL
3.1.1. Power Requirements
The 8572 operates at 120 VAC (+10%, -15%) 60 Hz. Export versions of the 8572 oper ate on 220 VAC,
50 Hz. Power to the 8572 is provided by means of an external 0.6 A / 12 VDC power supply. Power
consumption for the basic 8572 without any options installed is four watts.
The 8572 meets the NIST H-44, Canadian Gazette Part 1, and OIML-SP7/SP2 line voltage variation
specifications.
Line Voltage
AC Line VoltageLine Frequency in Hz
Variation
Specification
MinimumNominalMaximumMinimumNominalMaximum
NIST H-4410012013059.56060.5
Canadian10812013258.86061.2
OIML-SP7/SP2
102
187
204
120
220
240
132
242
264
58.8
49.0
49.0
60
50
50
61.2
51
51
Table 3-1 AC Line Power Voltage Specifications
3.1.2. Conducted and Radiated Emissions
The 8572 meets or exceeds FCC docket 80-284 for conducted and radiated emissions requirements.
The 8572 meets or exceeds the VDE 0871 class B specification for conducted and radiated emissions.
3.1.3. Radio Frequency Interference
The 8572 meets U.S.A., Canadian, VDE 0871 class B, and U.K. requirements f or RFI susceptibility as
listed below with a maximum of one display increment of change.
Radio
U.S.A.CanadianVDE 0871 Class BU.K.
Interference
Frequency
Field StrengthTransmitted Power at
27 MHz3 volts/meter4 watts at 2 meters3 volts/meter10 volts/meter
464 MHZ3 volts/meter4 watts at 2 meters3 volts/meter10 volts/meter
Field StrengthField Strength
Specified Distance
Table 3-2 Radio Frequency Interference Continued
(N.A.) Not Applicable
5
3.2. ENVIRONMENTAL
The 8572 is intended for use in a general purpose atmosphere. It is intended for indoor applications where
dirt, oil or water is not present. The 8572 is not designed for "hose-down" applications. Typical examples of
misapplication of the scale include, but are not limited to: Immersion in liquid, hosedown, corrosive
chemicals.
3.2.1. Temperature Specification
The 8572 has an operating temperatur e range of from 10 0 to 40 0 C, (50 0 to 104 0 F) at 10 to 95%
relative humidity, non-condensing. The 8572 has a storage temperature range of -40 0 to 60 0 C, (-40
to 140 0 F) at 10 to 95% relative humidity, non-condensing.
3.2.1.1. Internal DigiTOL® Load Cell
The 8572 internal scale has a zero temper ature coefficient of 24 PPM/0C and a span temperature
coefficient of 23 PPM/0C.
3.2.1.2. Remote Analog Scale PCB
The optional analog scale PCB has a zero temperature coefficient of 0.1 uV/0C and a span
temperature coefficient of 6 PPM/0C
3.2.2. Hazardous Areas
0
In locations classified as hazardous by the National Electrical code (NEC) because of combustible or
explosive atmospheres or materials, special precautions are required.
DO NOT USE THE 8572 IN THESE LOCATIONS
3.3. PHYSICAL SPECIFICATIONS
3.3.1. Appearance and Dimensions
The 8572 enclosure is fog white with a black platter ass em bly and multi-c olor k eyboard. the unit is 5.3"
(135 mm) high, 14.7" (375 mm) wide and 14.6" (370 mm) deep. The standard 8572 weighs
approximately 20 lb (9.1 kg). The bas e and sub-platter are made from die- cast aluminum . The 8572
uses a single point loading, moment-insensitive load cell. The cover and bezel are made of heavy
structural plastic. A level indicator bubble is mounted in the sub-platter which can be viewed by
removing the platter.
3.3.2. Internal Scale Platter
The 5 lb capacity scale has an 8" X 8" (205 m m) plastic platform . The 10, 25, 50, and 100 lb capacity
scales has a 14.5" wide (370 mm) X 10.8" deep (275 mm) painted steel platter.
3.3.3. Shipping Information
Approximate shipping weight is 22 lb (10 k g). Carton dimensions ar e 9" (230 mm) X 19" (485 mm) X
19" (485 mm).
.
3.4. DATA INTERFACE
6
The 8572 supplies a bidirectional RS-232 printer port standard. The baud rate is selectable from 300 to
9600 baud and parity is selectable as even, odd, or parity bit always a "0". All data is in a 10 bit fram e: 1
start bit, 7 ASCII coded data bits, 1 parity bit and 1 stop bit. The 8572 printer port is powered by the
external RS-232 device connected to the 8572. Both the transmit and receive RS-232 data lines of the
8572 printer port must be connec ted to a true RS- 232 exter nal devic e to permit data output. No hands hak e
lines are provided on the printer port.
3.4.1. Data Output
When a print request oc curs (caus ed by pressing the
an ASCII "P" into the printer port), the 8572 will output data unless output is inhibited. Data output will
be inhibited by an unstable weight reading (scale "in motion"), an out of range weight reading (under
zero or over capacity) or if the 8572 is in the expanded weight display mode. If repeat print is disabled
the 8572 will output data only once per weighment after which the load on the scale must be removed
and a new load placed on the scale before data can be output.
A selectable checksum character can be added to the data output to perm it detection of transmission
errors. A selectable ASCII <SO> (shif t out) charac ter can be added to the data output to request lar ge
print size in the Model 8806 and 8860 printers.
3.4.2. Data Input
The 8572 printer port can be configured to permit an external device to control the 8572. Upper case,
ASCII characters ("C", "P","T" and "Z") received into the printer port are equivalent pressing to the
keys on the 8572 keyboard. The accumulator total can be
5 X 0.001 lb
10 X 0.002 lb
25 X 0.005 lb
50 X 0.01 lb
100 X 0.02 lb
2.5 X 0.0005 kg
5 X 0.001 kg
10 X 0.002 kg
25 X 0.005 kg
50 X 0.01 kg
3.75 kg
7.5 kg
15 kg
30 kg
60 kg
220 VAC, 50 Hz
Europe and
General Export
Versions
8572-1002
8572-1003
8572-1004
8572-1005
8572-1006
5 X 0.001 lb
10 X 0.002 lb
25 X 0.005 lb
50 X 0.01 lb
100 X 0.02 lb
2.5 X 0.0005 kg
5 X 0.001 kg
10 X 0.002 kg
25 X 0.005 kg
50 X 0.01 kg
Table 3-3 Factory Number Configuration
7
3.75 kg
7.5 kg
15 kg
30 kg
60 kg
- For Your Notes -
8
4. INSTALLATION INSTRUCTIONS
Examine the shipping box for damage.
Open the box, remove the scale, and plac e the scale on a f lat, level, stable surf ace. Save the shipping box f or
future use.
IMMEDIATELY make a claim with the carrier if damage is found.
2 CAUTION!
Do not lift the scale by the platter or sub-platter. Grasp the scale by the base
to lift. Do not stress or bump the sides of the platter as this will place a side
torque on the platter and may damage the load cell.
4.1. UNPACKING AND SETUP
For the 5 lb capacity scale (8572-0002, 1002), follow the procedure lis ted in Section 4.1.1. For all other
versions, lift the platter upward to remove, find the level bubble indicator located in the center of the
subplatter and proceed to Section 4.1.2.
Remove the rubber band securing the 8" X 8" plastic platter to the s ub-platter. G rasp the plas tic platter
by the edges and lift straight up to remove it. The platter is held by hook and loop fasteners in the
corners. Remove the two #8-32 screws and rubber O rings from the top of the sub-platter. Remove the
tape and shim from the top of the right side of the dead- deck . Locate the level bubble indicator located
on the left front of the subplatter. Refer to Figure 4-1. Save all shipping hardware for future use.
4.1.2. Level the Scale Base
Figure 4-1 Low Capacity Shipping Hardware
9
Level the scale by turning the adjustable feet on the bottom of the scale bas e until the level indicator is
correct. The feet mus t be adjusted so the scale does not roc k. Carefully tighten the lock nut at each
adjustable foot. Refer to Figure 4-2.
Figure 2 - Level Bubble
4.1.3. Install All Optional KOPs
Install any desired options in the 8572. Refer to the installation instructions included with the optional kit
of parts. Adding any option to the 8572 requires substituting the optional 1.5 A / 12.5 VDC power supply
(*135693 00A) for the standard 0.6 A / 12 VDC power supply (*135156 00A).
4.1.4. Initial Power Up Sequence
Connect AC power to the 8572 and turn on the power switch (located on the right side of the base near
the front). The following sequence of events will then occur:
6
All cursors, data fields, and legends light up and the decimal point then scr olls across the dis plays
from the right-most digit to the left-most digit.
6
The software part number and revision level are then displayed for a few seconds.
an example of the L02 revision powerup display. If a
[tESt ]
message is displayed instead of the
[135629 L02]
software part number then the 8572 is in the factory test mode. The test mode is entered by
powering up the 8572 with the setup switch turned on and is for factory setup use only. To exit the
test mode: power down the 8572, slide the setup switch to the rear of the enclosure, and power up
the 8572. Refer to Section 4.2. for setup switch location and description.
6
During power up the Logic PCB tests all memory devices and establishes com munication with the
load cell and any optional PCB's that are enabled in setup. Error m ess ages are displayed if any of
the memory tests are failed or if the load cell or optional PCB does not respond.
[E3]
If an
error is displayed then the setup mem ory is corrupt. Access the setup as descr ibed in
Section 4.2. and verify 8572 programming and calibration.
If any other error messages are displayed during the power up sequence refer to Sec tion 7.1. for
error code explanations and recommendations.
6
The last step of the power up sequence involves capturing zero on the gross scale if auto zero
capture or tare interlocks are enabled in setup. If the weight on the gross scale is within the auto
zero capture range (±2% or ±20% of programm ed scale capacity as selected in s etup), zero will be
automatically captured by the 8572 and sample and gross scale selection will be as selected in
setup step
If the weight reading is outside of the zero capture range, the prim ary display shows
[18]
.
[ E E E]
indicate that the weight indication is greater than the auto zero capture range. The primary display
shows
[-E E E]
to indicate that the weight indication is less than the auto zero capture range.
is
to
4.2. PROGRAMMING PROCEDURE
The SETUP mode perm its access to the programm ing and calibration parameters. To enter the SETUP
mode on the 8572, remove the platter ( on scales with the 11" by 14" platform) or rem ove the plastic cover
10
plug (on scales with the 8" square platter) and locate the setup s witch access hole. Refer to Figure 4-3.
Slide the setup switch toward the front of the scale using a pointed, non-conductive object. Do not us e an
object that could be easily dropped into the unit.
Low Capacity Versions Higher Capacity Versions
Figure 4-3 Setup Switch Access Hole
After the setup switch is actuated, the 8572 displays
[-- ]
. The 8572 is now in the setup mode and ready to be
programmed.
The following keys are redefined to perform the function specified when in the setup mode.
ENTER
-Press this key to terminate a data entry for a specific step or accept the displayed value and
advance to the next setup parameter.
ZERO
CLEAR
-Press this key to back-up to the previous step.
-Press this key to clear the display, when the 8572 is prompting for data entry, and permit a new
value to be entered.
1
-Press this key to indicate a
0
-Press this key to indicate a NO response and advances to the next setup selection.
YES
response and advances to the next setup selection.
11
4.3. SETUP QUICK REFERENCE
NOTE: The following chart pertains to the
(135629 LO2)
prompt displayed after powerup. Recommended default selections are shown in
WILL SHOW THE DISPLAYED PROMPT AND
THE INDENTED PARAGRAPHS WILL EXPLAIN THE SETUP STEPS FUNCTION AND
SELECTIONS. TO EXIT THE SETUP MODE, SLIDE THE SETUP SWITCH TO THE
REAR OF THE SCALE ANY TIME THE DISPLAY IS SHOWING
[--]
.
[10] CALIBRATION GROUP
With
[--]
on the display press the 1 key and then the 0 key. The display will then show
[11 X]
.
[11 1] CALIBRATION UNITS
Select the units to be used for the primar y display and the test weight type used during span adjust and
calibration. Enter selection using the numeric keys on the keyboard.
NumberDisplay Weight LegendCalibration Weights
0
1
2
3
4
5
6
7
None
lb
kg
g
oz
toz
t
dwt
lb
lb
kg
g
oz
troy oz
metric tons
penny-weight
[12 0] LINEARITY COMPENSATION
The 8572 provides a calibration procedure to allow compensation of nonlinearities in the weighing
performance of the scale base. T his procedure is not nor mally required and is provided for use only when
the normal calibration procedure does not result in a linear response from the scale.
0
- Linearity compensation is disabled.
1
- Two step linearity compensation is enabled.
NOTE:
When us ing linearity compensation, test weights of one half scale capacity and full sc ale capacity mus t
be used. If less than full capacity is used, linearity compensation is not performed.
[13 0] REMOTE SCALE SELECTION
Selects type of remote scale base in use. Enter selection using the numeric keys on the keyboard.
NumberScale 2 Selection
0
1
2
3
Note:
If a remote scale bas e is not selec ted
Model 2157 (digital j-box) is not selected
None
Single DigiTOL® Load Cell
Model 2157 Floor Scale (digital j-box)
Analog Load Cell
Table 4-1 Default and Minimum Internal Scale Builds
Increment
Scale Capacity (Total Number of Displayed Increments)
Size
30004000500060001000020000250004000050000
0.0001
0.0002
0.0005
0.001
0.002
0.005
N.A.
N.A.
1.5
3
6
15
N.A.
N.A.
2
4
8
20
N.A.
1
N.A.
5
10
25
N.A.
N.A.
3
6
12
30
1
2
5
10
20
50
2
4
10
20
40
100
or 1 key to accept the displayed
Cell
Capacity
1.5
3
6
12
25
N.A.
5
N.A.
25
50
125
N.A.
N.A.
20
N.A.
N.A.
N.A.
3.75 kg
7.5 kg
15 kg
30 kg
60 kg
5
10
25
50
N.A.
N.A.
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
20
30
60
150
300
600
1500
3000
6000
15000
30000
60000
40
80
200
400
800
2000
4000
8000
20000
40000
N.A.
50
100
250
500
1000
2500
5000
10000
25000
50000
N.A.
60
120
300
600
1200
3000
6000
12000
30000
60000
N.A.
100
200
500
1000
2000
5000
10000
20000
50000
N.A.
N.A.
Table 4-2 Valid Scale Builds
(N.A.) Not Applicable
15
200
400
1000
2000
4000
10000
20000
40000
N.A.
N.A.
N.A.
250
500
1250
2500
5000
12500
25000
50000
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
1000
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
[17A] CALIBRATE SCALE 1
Press the 1 key to calibrate scale 1, or press the 0 key to advance to skip calibrate the next
programming step.
[E SCL] EMPTY SCALE
Empty the scale platter then press the
[CAL 01]
as a zero reading is recorded. The display then shows
ENTER key.
The display then counts down from
[Av]
while the analog verify reading is
[CAL 16]
to
recorded.
The span calibration sequence is next. Scale calibration will follow one of two following procedures
depending on how linearity compensation is programmed.
If linearity compensation is disabled, setup step
If linearity compensation is enabled, setup step
Place test weights as close to 50% of full scale capacity as possible on the center of the scale
platter and press the
disabled, setup step
Enter the value of the test weights using the numeric keys followed by the
NOTE:
The test weight value used should be as close to the programm ed scale capacity as pos sible,
ENTER
[12 0]
key. This prompt will only occur if linear ity compensation has been
.
ENTER
key.
but in any case no less than 50% of scale capacity. In no case may the test weight used be larger than
the scale capacity programmed in setup step
[15A]
.
The display then counts down from
[CAL 16]
[CAL 09]
to
. The 8572 compares the programmed
scale capacity with the number of raw counts output by the load cell. If the load cell is not sending
sufficient counts for the scale capacity entered, the 8572 sends the load cell new T1 calibration
parameters and attempts to increase the number of counts from the load cell.
If the load cell cannot output enough counts for the pr ogramm ed scale capacity an
be displayed. This error means the s cale capacity entered in setup step
[15A]
[E36]
is too small for the
load cell and must be increased, or that the load cell is not operating properly.
If the 8572 receives enough counts from the load cell the count down will continue from
[CAL 01].
Increasing the number of counts out of the load c ell will require an additional
[CAL 09]
step to complete the calibration.
[E SCL] EMPTY SCALE (Occurs only if new calibration data is sent to load cell)
Empty the scale platter then press the
[CAL 01]
to
as a zero reading is recorded. The display then shows
ENTER key.
The display then counts down from
[Av]
while the analog verify
reading is recorded. If linearity compensation is disabled the 8572 then skips to section 4.3.1.4.
Place test weights as close to 100% of f ull scale capacity as possible on the center of the scale
platter and press the
enabled, setup step
ENTER
[12 1]
key. This prompt will only occur if linear ity compensation has been
.
Enter the value of the test weights using the numeric keys followed by the
NOTE
: Linearity compensation calibration requires test weights as close to 100% and 50% of scale
capacity as possible. Calibration with test weights other than 100% of capacity at
capacity at
The display counts down from
[Add L0]
can result in weighing errors.
[CAL 16]
[CAL 09]
to
. The 8572 compares the pr ogrammed s cale
ENTER
[Add FL]
key.
or 50% of
capacity with the number of raw counts output by the load cell. If the load cell is not sending
sufficient counts for the scale capacity entered, the 8572 sends the load cell new T1 calibration
parameters and attempts to increase the number of counts from the load cell.
If the load cell cannot output enough counts for the pr ogramm ed scale capacity an
[E36]
be displayed. This error means the s cale capacity entered in setup step 15A is too small for the
load cell and must be increased, or that the load cell is not operating properly.
If the 8572 receives enough counts from the load cell the count down will continue from
[CAL 01].
Increasing the number of counts out of the load c ell will require an additional
[CAL 09]
step to complete the calibration.
[Add LO] ADD HALF CAPACITY LOAD
Place test weights as close to 50% of full scale capacity as possible on the center of the scale
platter and press the
Enter the value of the test weights using the numeric keys followed by the
ENTER
key.
ENTER
key.
error will
to
[E SCL]
The 8572 then counts down from
[CAL16]
[CAL 01]
to
.
[E SCL] EMPTY SCALE (Occurs only if new calibration data is sent to load cell)
Empty the scale platter then press the
[CAL 01]
as a zero reading is recorded.
ENTER
key. The display then counts down from
[Av]
is displayed as analog verify reading is recorded.