Avery Weigh-Tronix WI-125 User manual

WI-125 (QTLTSC)
Indicator and System
Service Manual

Table of Contents
Introduction .......................................................................................................................1
Operational Modes ............................................................................................................ 1
Operations Mode ........................................................................................................ 1
Test Mode ................................................................................................................... 1
Configuration Mode..................................................................................................... 1
Sealing the Indicator.......................................................................................................... 1
Keyboard...........................................................................................................................2
Entering Numbers with Arrow Keys.............................................................................2
Configuration Mode ........................................................................................................... 3
Customizing the Layout Menu..................................................................................... 9
ASCII Strings...................................................................................................... 10
Examples and Step by Step Instructions................................................................... 12
Deleting One ASCII Code From an ASCII String ................................................ 12
Deleting All the ASCII Codes in an ASCII String................................................. 12
Deleting an ASCII Print Command After the ASCII Codes Are Cleared ............. 13
Deleting a Non-ASCII Print Command From the Layout Menu...........................13
Inserting a Print Command in the Layout Menu.................................................. 13
Adding Characters to an ASCII String ................................................................ 13
Calibration ....................................................................................................................... 15
Entering the Configuration Mode to Calibrate the System......................................... 15
J-Box Information ..................................................................................................... 16
Original Style J-Box ............................................................................................16
Trim Potentiometer Adjustment ................................................................................ 17
Balance Potentiometer Adjustment........................................................................... 18
Spanning Adjustment for an Existing Calibration ...................................................... 19
Step-by-Step Instructions for Acquiring Data Points ................................................. 21
Calculating New Lift Capacity .......................................................................................... 25
Making a Ramp ........................................................................................................ 26
Replacing a Transducer on the QTLTSC Carriage .......................................................... 27
Disassembly ............................................................................................................. 27
Reassembly .............................................................................................................. 27
Loosening Procedure................................................................................................ 28
Tightening Procedure................................................................................................ 28
Reset Menu and Master Clear......................................................................................... 29
Master Clear Menu ................................................................................................... 30
Reset Menu .............................................................................................................. 30
Indicator Diagnostics ....................................................................................................... 31
WI-125 QTLTSC Troubleshooting Tips ........................................................................... 33
Resistance Test of QTLTSC Weigh Bars ........................................................................ 36
Technical Illustrations and Assemblies ............................................................................ 37
i

WI-125 Specifications
Dimensions: 9.37" W x 6.75" H x 3.75" D
(23.8 cm x 17.1 cm x 9.5 cm)
Power: 10 to 90 VDC, 300 mA minimum
Display: 8 digits, 7-segment LCD, 0.6 inch high with annunciators and backlighting.
Display Rate: One, two or five times per second
Agencies: NIST Handbook 44, Class III, IIIL, 5,000 divisions
Consumer and Corporate Affairs, Canada
FCC Class A
Accuracy : Class III, IIIL; 5,000 divisions
Span: ±5.0 ppm/C Zero: ±.066 uV/C (-10 to 40°C)
Span: ±10 ppm/C Zero: ±0.13 uV/C (-30 to 60°C)
Linearity: ±0.005% of capacity, maximum
Repeatability: ±0.005% of capacity, maximum
Hysteresis: 0.005% of capacity, maximum
Weigh bar drive capacity: Up to eight 350 ohm weigh bars.
Environment: -10 to 40°C (14 to 104°F) for HB-44 specs
10 to 90% relative humidity
Internal Resolution: 0.25 mV/V = 67,500 counts
A to D conversion rate: 30 times per second
Analog Range: -0.14 to +3.5 mV/V
Capacity: .00001 to 999999, programmable to any number between these limits.
Divisions: .0001 to 20000, programmable to any division size between these limits.
Push Button Zero Range: 0 to ±100% of capacity; programmable independent positive and negative limits; unit will not allow
zeroing beyond capacity.
Tare: The unit may be configured to have pushbutton tare which can function as a scroll tare register.
Pushbutton tare and scroll tare may tare only positive gross weights up to the capacity of the unit. Scroll
tare allows numeric entry of a tare value using two keys to enter the value.
Motion Detection Window: Programmable from 0 to 999999 divisions, decimal entries are accepted.
Automatic Zero Tracking: Window: Programmable from 0 to 999999 divisions, decimal entries are accepted.
Net Mode
Tracking: May be enabled or disabled.
Rate: 0.2 division per second
Starting Delay: 2 seconds
Angle Compensation: Compensates for pitch and/or roll out-of-level weighing.
VIBRATION COMPENSATION
Analog Low Pass Filter: Two section with .10 second time constant for low power analog and .06 second time constant for
standard analog.
Software Low Pass Filter: One section with .05 second time constant.
ii

1
Introduction
This service manual covers the WI-125/Quik-Tach certified lift truck system.
The front section of the manual covers such things as configuration of the
indicator and calibration of the system. The back section contains technical
drawings of the system components.
Operational Modes
The WI-125 operates in three modes:
• operations mode
• test mode
• configuration mode
Operations mode contains all normal weighing operations. In this mode, you
can view or set the following parameters if the unit is so configured:
• pushbutton tare
• time
• date
• light (backlight)
Any combination of these items can be secured behind a security code. Any
items secured by the code number can be viewed but not changed. Opera-
tions mode is fully explained in the WI-125 (QTLTSC) Indicator User's
Manual (PN 29608-0013) .
Use this mode to perform tests on the WI-125. The test mode is covered in
the Indicator Diagnostics section of this manual.
Use this mode to set up options and program the operation of the scale and
indicator. Configuration is explained fully in the Configuration Mode section
of this manual.
Sealing the Indicator
The WI-125 can be sealed. If sealed, no configuration
items can be changed in the configuration menu. Seal
the unit by placing switch S1-1 in the OFF position.
Unseal the unit by placing S1-1 in the ON position.
Remove the front panel of the indicator to gain access
to switch S1-1. The switch is located near the bottom
corner of the PC board behind the display and looks like
the diagram at right.
Complete the physical sealing
of the unit by using a sealing
wire and the screws on the
outside of the enclosure.
S1-2 is not functional.
Operations Mode
Test Mode
Configuration Mode

2
Enters a pushbutton tare in gross/net operation. This key's
factory default is OFF and it must be enabled for use.
Accesses the gross weighing mode from any other function
and activates the net weighing mode if a tare is active.
Zeros the scale in gross or net weigh mode. This button
also clears scrolled digits on the display before they are
accepted.
Sends a print command and is used to select menu items.
Used to access menus and move among choices in a
menu.
Changes the unit of measure during operations mode and
moves a digit inserted with the - key one space to the left.
The factory default for this key is set for lbs only.
Lets you scroll numerical values.
G/N
CLEAR
ZERO
0
UNITS
S
ELE
C
T
PRINT
The arrow keys are used to enter numbers throughout different configuration
selections. Refer to this section when you need to enter a number or num-
bers.
Example: To key in the number 603
Press the ↑ key repeatedly until the 6 appears on the display.
Press the ←key once to move the 6 one space to the left.
Press the ↑key until the 0 appears.
Press the ←key once to move the 60 one space to the left.
Press the ↑ key until 3 appears.
To exit to normal weigh mode, press G/N.
Keyboard
Entering Numbers with
Arrow Keys
TARE
T
123456
W I - 12 5
TARE
T
C
LEAR
ZERO
0
SELECT
PRINT
G/N
UNITS
Figure 1
WI-125 Keyboard

3
Setup, Scale, Units-
Pounds, 1000g
Under each unit of measure you have the option of selecting ON or
OFF. Choosing the OFF option under a unit of measure disables
that unit of measure. If a unit is disabled, it will not appear in the
configuration menu under CAPACITY or DIVISION nor will you be
able to choose it during weighing procedures.
Setup, Scale, Units, Capacity-
Pounds, 1000g
This menu section lets you set the scale capacity for those units of
measure enabled under UNITS . For lb/kg scales to be sealed in the
USA, you must be sure the capacities are within one division. For
example, if you want a 10,000 by 2 lb scale, the kg capacity must be
4536 kg. Note that the indicator will show over range at 10,000 lb. If
a 2.5% over range is desired, you must enter 10250 lb and 4695 kg
as the capacities in this example.
Setup, Scale, Units, Capacity, Division-
Pounds, 1000g
This option lets you set the division size for the units of measure
enabled under UNITS .
One feature not readily apparent is that the number of displayed
leading zeros can be specified. For example, for 10 pound divisions,
if you want 5 zeros displayed when no weight is on the scale, key in
00010 for a division size. The display will read 00000 when the scale
is empty. If you want two zeros displayed when the scale is empty,
key in a division size of 10.
Configuration Mode
This section of the manual explains how to view and set up parameters in
the configuration mode. Follow the configuration menu and instructions in
Figure 2 to set up the WI-125 indicator to suit your specific needs. Below
are explanations for each section of the menu. The non-bold heading for
each section is the pathway you follow on the configuration menu to get to
the parameter or parameter options shown in bold text.
Sidestepping Security Code Entry to Configuration
In case you forget the security code or the security code is altered
without your knowledge, access the configuration menu as
follows: First, make sure switch S1- 1 is in the OFF position. Then
enter the default code number 1. Get into the configuration menu
as instructed in the key to Figure 2. When CODE NUMBER is
displayed on the menu, flip switch S1-1 from the OFF position to
the ON position. Understand that opening the indicator to access
the switch unseals the indicator! Then enter a new code number
twice, as the display prompts. Now you have complete access to
the configuration menu.

4
Setup, Scale, Units, Capacity, Division, Zero-
-Percent, Percent
With this option you can set the plus and minus percent of capacity
that the indicator can zero. For example, if the capacity of the scale
is 10,000 lb and the zero range is ±2%, key in 2 for both the positive
and negative ranges. You may key in decimal values.
Setup, Scale, Units, Capacity, Division, Zero-
Stability
This option lets you set the size of the motion detection window in
divisions. You may enter decimal values less than one or up to
999999 which turns off the motion detection.
Setup, Scale, Units, Capacity, Division, Zero, Stability, AZT -
Range, Net
Range - With this option you can set the ± automatic zero tracking
window in scale divisions. To turn off AZT, enter a range of 0.
Net - If an AZT range is set, NET will appear in the menu. This
option lets you choose to enable AZT during net weighing opera-
tions (ON) or disable it (OFF). The gross weight must be zero for
AZT to work in net mode.
Setup, Scale, Units, Capacity, Division, Zero, Stability, AZT, Update -
5, 1, 2 Choose the rate at which your display updates information, 1, 2, or 5
times per second. Five is the default value.
Setup, Scale, Units, Capacity, Division, Zero, Stability, AZT, Update -
Average
This option allows you to choose the number of display periods over
which the dates are internally averaged prior to being displayed. Any
number between 1 and 10 may be entered. Three is the default
value.
Setup, Scale, Options
Angles Choosing ON enables angle sensors. Choosing OFF disables angle
sensors.
Setup, Scale, Options, Angles
Dashes?
Choosing ON causes dashes to be displayed during scale motion.
Required for Canadian certification.
Setup, Scale, Options, Angles
Tare Choosing ON enables the pushbutton tare. Choosing OFF disables
the pushbutton tare. If pushbutton tare is disabled, TARE will not
appear in the operations menu.
Setup, Scale, Options, Angles, Tare
ID Shows unit identification number.
WARNING - Do not set
ANGLES to OFF or all calibra-
tion data will be lost. OFF
should only be chosen if the
indicator is connected to a lift
truck scale with no angle
sensing capability.

5
Figure 2

6

7
Setup, Scale, Options, Angles, Tare, ID -
Hour With this option you can choose to have the clock disabled (OFF) or
the mode of clock you want. You can choose the 12 hour clock
display or the 24 hour clock display. If the clock is disabled, HOUR
will not appear in the SECURITY section of this menu and DAY will
not appear in the OPTIONS or SECURITY section of this menu.
Setup, Scale, Options, Angles, Tare, ID, Hour -
Day This option lets you choose to disable the calendar (OFF) or choose
the mode of calendar display you want. You can choose to display
the days (dd), months (mm), and year (yy) as mm dd yy, or dd mm
yy, or yy mm dd. If DAY is disabled, DAY will not appear in the
SECURITY section of this menu.
Setup, Scale, Options, Security -
Code No.
This option lets you enter a personalized security code number.
Setup, Scale, Options, Security, Code No. -
Hour, Day
Under each item you have the option of choosing OFF to leave the
option unlocked or choosing ON to lock the option behind the
securitycode. If ON is chosen you can view but not change that
parameter value in the operations menu.
Setup, Scale, Options, Security, Serial, Print -
Button Choosing OFF disables the front panel PRINT button. Choosing ON
enables the front panel PRINT button.
Setup, Scale, Options, Security, Serial, Print, Button -
EnquireThis sub-menu allows you to choose a printer or other device which
will send an enquire code to the indicator. You may select the ASCII
code number you wish to act as the enquire code number. ASCII
decimal 0005 is the default value. If a device sends the enquire
code number to the indicator, the indicator will transmit weight data.
If a computer sends the enquire code number, the Button, Auto and
Broad. selections are overridden and will not function.
Setup, Scale, Options, Security, Serial, Print, Button, Enquire -
Auto With auto print enabled the indicator automatically transmits weight
data when the scale weight stabilizes at greater than 1% of capacity.
To print again, scale weight must fall below 1% of capacity and
stabilize above 1% of capacity again. OFF disables the auto print
feature. ON enables the auto print.