WeighTech MicroWeigh User manual

MicroWeigh Datascale
WeighTech, Inc. Staff
Waldron, Arkansas
1-800-457-3720
March 30, 2011

Contents
1 Introduction 4
1.1 MicroWeighFeatures.......................... 4
1.2 MicroWeigh Applications . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Keypad Operation 4
3 Main menu items 5
3.1 “Poweroff”............................... 5
3.2 “Washdown” .............................. 5
3.3 “Totals” ................................. 5
3.4 “Calibrate” ............................... 5
3.5 “SetupMenu”.............................. 5
3.6 “Auditcfg” ............................... 5
3.7 “Auditcal” ............................... 5
3.8 “Tare”.................................. 6
4 How to Step Through Menus 6
4.1 Menus can contain several different items . . . . . . . . . . . . . . . 6
4.2 Howtoenteranumber ......................... 6
4.3 How to select from a list . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 General Scale Operations 7
5.1 ScaleOnProcedure............................ 7
5.2 ScaleOffProcedure........................... 8
5.3 ZeroProcedure ............................. 8
5.4 UnitsProcedure............................. 8
5.5 TareOperation ............................. 8
5.6 DataMode ............................... 8
6 Label Setup 9
7 Calibration Procedure 10
7.1 Entering the calibration menu . . . . . . . . . . . . . . . . . . . . . . 10
7.2 Keyingincalweight .......................... 10
7.3 CalibrationExample .......................... 10
7.4 Establishingazero ........................... 12
7.5 Accepting a cal weight . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 Scale Parameters 13
8.1 “Units” ................................. 13
8.2 “Capacity”................................ 13
8.3 “Resltn”................................. 13
8.4 “Stability”................................ 13
8.5 “Motionsns” .............................. 13
8.6 “Prefilter”................................ 13
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8.7 “AZT”.................................. 14
8.8 “AZTband”............................... 14
8.9 “Calibrate” ............................... 14
8.10“IZset” ................................. 14
8.11“lbunits” ................................ 14
8.12“kgunits” ................................ 14
8.13“gunits”................................. 14
8.14“ozunits” ................................ 14
8.15“Defaults”................................ 14
9 Menus 15
9.1 MainLevel ............................... 15
9.2 Setupmenu ............................... 15
9.3 Parameters................................ 16
9.4 Totalsmenu............................... 16
9.5 Labelsetup ................................ 17
9.6 New/Editlabel .............................. 17
9.7 Infomenu................................ 18
10 Troubleshooting 18
10.1Loadcells................................ 18
10.2 Before calling WeighTech... . . . . . . . . . . . . . . . . . . . . . . 19
11 Replacement Parts 19
12 Wiring Diagram 20
13 Load Cell Color Codes 21
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1 Introduction
With the WeighTech MicroWeigh a combination of state-of-the-art technology with
common down-to-earth basics creates a digital indicator that makes troubleshooting and
actual maintenance repair so simple that anyone can be trained to make repairs on this
indicator in just minutes.
1.1 MicroWeigh Features
•High impact ABS alloy construction.
•Highly visible, easy-to-read display with adjustable contrast and backlight.
•Environmentally sealed touch-sensitive operator control panel.
•Standard units of measure include grams, kilograms, ounces, and pounds.
• RS-232 and Infrared communications are standard with RS-485 option available.
•Wireless data collection using a PDA with WeighTech ScaleTrax software.
1.2 MicroWeigh Applications
•Standard weighing
•Label printing
•Tank or vat weighing
•Checkweighing (boxes, bags, and pieces)
•Bench and floor scales
•Batch weighing
2 Keypad Operation
The WeighTech MicroWeigh keypad is a watertight sealed touch sensitive sensor. The
keys are actually sensitive to contact area, not force. Press lightly with the ball of your
fingertip as though you were giving fingerprints. Best results come from using the
ball of your finger, not the very tip. Most objects will not trigger the keypad–knives,
screwdrivers, tools, etc. do not have enough surface area in contact with the key to
register as a keypress. (You might get it to trigger with a medium sized conductive bolt
head, if you have skin in contact with the bolt.)
One consequence of the design of the touch sensitive keypad is that it is sensitive
to water streams. For this reason, WeighTech includes a unique “washdown mode” to
prevent unwanted keypad activity during washdown/sanitation/cleanup intervals. When
the indicator is in washdown mode, the indicator will weigh normally but the keypad is
locked out.
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To unlock the keypad, you must play follow the leader. One key will be lit. Press
it. Another key will then light up. Press it. Continue until the indicator displays “Exit
washdown”. The indicator will require that you press five keys in a row correctly before
it will unlock the keypad. Any wrong keypress will restart the counter back to five. The
odds are extremely slight that random water splashing would ever be able to trigger the
correct keys in the correct order to unlock the keypad.
3 Main menu items
3.1 “Power off”
Touch the enter key to select this menu item, which will power down the indicator. If
the auto-on jumper is installed on the interface board, the indicator will immediately
turn back on.
3.2 “Washdown”
This function puts the indicator in washdown mode to prevent inadvertent keypad
activity. See the washdown section of this manual for more information.
3.3 “Totals”
This function leads to the totals submenu.
3.4 “Calibrate”
This function allows you to calibrate the scale. Refer to the calibration section of this
manual for details.
3.5 “Setup Menu”
Enter the setup submenu, where scale parameters can be viewed or set.
3.6 “Audit cfg”
Displays the audit counter for configuration. Every time a sealed scale parameter is
modified this counter will increment by one. This setting is nonvolatile (it will be
retained even if the batteries go dead) and cannot be altered except by modifying an
audited configuration parameter.
3.7 “Audit cal”
Displays the audit counter for calibration. Every time the scale is calibrated this counter
will increment by one. This setting is nonvolatile (it will be retained even if the batteries
go dead) and cannot be altered except by performing a calibration.
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3.8 “Tare”
Keypad entered tare: Touch the Enter key to set a new pushbutton tare by scrolling
through digits one place at a time. Keypad tare values are entered in the current units,
and are limited to be greater than gross zero weight and less than the indicator capacity.
Entering a tare of zero will clear any existing tare from indicator.
4 How to Step Through Menus
From the main weight display, press the “Menu/Help” key. You are now in a menu, and
the keys now have different functions:
Cancel Help Enter Down Up
•“Cancel” will back you out of the menu one level at a time.
•“Help” will display information about the current choice (option).
•“Enter” has various functions, depending on where you are in the menu.
•The “Down” key will scroll backward through the menu choices.
•The “Up” key will scroll forward through the menu choices.
4.1 Menus can contain several different items
An item with a “*” on the right end will do something when you press the enter key–
something might be turn the indicator off, drill down into another menu, clear totals, or
start a calibration routine. The item with a numeric value (scale capacity, for instance)
at the right side of the display might allow you to change the number by pressing the
enter key. An item with text (such as “on” or “off”) at the right side of the display might
allow you to select from a list of options by pressing the enter key. Some items are just
for reference and cannot be changed at all. Examples of reference items would be the
software name and revision–these are set when the software is written and cannot be
changed.
4.2 How to enter a number
Using the calibration routine as an example: Press the “Enter” key. The indicator display
will show “Cal weight ” and the cursor will be blinking. The blinking cursor is the
clue that you can enter an arbitrary number using the up, down, right, and enter keys.
Pressing the up/down keys will scroll through the list (0 1 2 3 4 5 6 7 8 9 - . ) in
turn. When the desired number appears, press the right arrow (menu/help) key. The
blinking cursor will advance one digit to the right, leaving your selected number in
place. Continue this sequence until the desired numeric value is visible on the display.
Press the “Enter” key to accept the value, or the “Cancel” key to abort.
Example: Enter a calibration weight of 25 pounds
•Start with the indicator at a normal weight display (“ 0.00 lb”)
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•Press the “Menu/Help” key
• Scroll through the main menu using the up or down arrow keys until “Calibrate *”
is displayed on the indicator
•Press the “Enter” key to start the calibration routine
• The indicator may display “Password” if a calibration password is required. If so,
enter it (default calibration password is “Zero” “Zero” “Zero”)
•The indicator should now be displaying “Cal Weight” and a blinking cursor.
•Press the up arrow key. The display should now show “Cal weight 1”
•Press the up arrow key again. The display should now show “Cal Weight 2”
• Press the right arrow key to accept the first digit (2) and advance the blinking
cursor to the next digit. The indicator should display “Cal weight 2 ”
• Press the up arrow key five times to select a 5 as the second digit. The indicator
should now display “Cal weight 25”
•Press the “Enter” key to accept 25 pounds as a calibration weight.
• The indicator will display “Cal–zero weight”. Press the “Cancel” key to abort the
calibration process.
4.3 How to select from a list
This is very much like stepping through a menu. Some settings (such as displayed
resolution) must be limited to one of several predetermined values. To edit one of these
settings, press the “Enter” key. The currently selected value will move from the far right
of the display to the left. This indicates that you may use the up and down arrow keys to
scroll through a list of possible values for this setting. Once you’ve selected a value for
the setting, press the “Enter” key to complete the selection process. As always, pressing
the “Cancel” key will cancel the selection and restore the setting to the previous value.
5 General Scale Operations
5.1 Scale On Procedure
Touch the “Zero / On” key. Indicator will come on and display will read “MicroWeigh
by WeighTech” and then continue to the weigh mode. At this point the scale is ready
for product or operator input.
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5.2 Scale Off Procedure
To turn the scale off touch the “Menu / Help” key. The indicator will display “Power
off *”. At this point touch the “Print / Enter” key and scale display will go blank, and
the indicator will be off. (If the auto-on jumper is installed on the interface board, the
indicator will immediately power up.)
5.3 Zero Procedure
To zero the indicator touch the “Zero / On” key and the indicator will take a new zero.
If the current weight reading is unstable, under capacity, or over capacity, no new
pushbutton zero will be established.
5.4 Units Procedure
To change the units of measure touch the “Units / Cancel” key. The units will change
between pounds, kilograms, grams and ounces (assuming all the units are enabled in the
“Parameter” menu) each time that the key is touched.
5.5 Tare Operation
Press and hold the tare button to establish a pushbutton tare reference. If a valid tare is
established, the indicator will switch to the net weight display. If the gross weight is
equal to or less than gross zero, any existing tare value will be cleared, the display will
show “Tare cleared” for about one second, and the display will revert to gross weight
display.
Toggle between net and gross display modes by touching the “Tare” button. If no
tare reference has been established, the indicator will not switch to net weight mode.
An arbitrary tare weight can be entered from the tare setting in the main menu
(keypad tare). Scroll and select digits one at a time to enter the desired value. The
indicator will not accept a keypad tare value in excess of scale capacity, or less than
zero. Entering a value of zero will clear any existing tare and return the indicator to the
gross weight display mode. Units for the entered weight is the same as the currently
displayed units. (To enter a six pound tare, be sure that the display is showing weight in
pounds before entering the keypad tare.)
5.6 Data Mode
Press the “Menu” key, then scroll until “Data mode” is visible. Press “Enter”. The
indicator will then prompt for the kill date, which should be entered in mm.dd.yy format
(such as “5.2.02” for May 2nd, 2002). As a shortcut, you can just press the “Enter”
key to use the current day as the kill date. Once the kill date has been entered, the
indicator will display “Data mode on” for a couple of seconds and enter datascale mode.
In datascale mode, the display will show the current product code on the left side, and
the current net weight on the right side. Several of the keys will also act differently in
datascale mode. Touch the “Print” key while the current weight is stable to print a label.
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Figure 1: A sample text-only label
The “Units/Cancel” key will undo the last printed label. The “Menu” key will display a
list of product codes and the “Product Exit” option. To switch to another product code,
simply scroll using the up and down arrows until the desired product code is displayed
and press the “Enter” key. Selecting “Product Exit” will exit the datascale mode and
return the scale to normal weighing operation.
Entering the use-by date is optional. If you do not enter a date and instead just touch
the “Enter” key, the indicator will calculate the use-by date from the kill date and the
use-by interval in the label setup section.
6 Label Setup
First, decide whether a full barcode label or a simpler text label is required. The text
label requires less information to be entered–only a product code and tare weight for
most applications. Create a new label by pressing the “Menu” key, scrolling to “Label
Setup”, and entering the label setup password (“Units” “Units” “Units”). The indicator
will then allow you to enter the product code, UPC (only used with barcode label), a tare
weight, an optional serial number (only used if serializing by product code), an auxiliary
field (used in place of the serial number if serialization is disabled), and a pallet size
(used only with barcode label).
Once the label information has been entered, the indicator will ask you to confirm
before actually storing the new label and product code to memory (“New code...sure?”).
Press “Enter” to confirm, or “Cancel” to abort. Once created, the label information is
stored in nonvolatile memory and will not be lost when the indicator is powered off.
For example, this text-only label contains:
“2032CEN0616”: “203” is the Julian day, “2” is the units digit of the current year (2002),
“CEN” is the plant name (Center, TX), “06” is the line number (assigned in the label
setup menu), and “16” is the current hour, in 24 hour format.
“6” is the line number.
“0000010” is the serial number.
“14.50 LB Net Weight” is the current weight, using the tare weight (in pounds) for
this product code.
“P25” is the product code (the “P” is automatic).
“Kill Date: 07-22-02” is the entered kill date.
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Figure 2: A sample full label
7 Calibration Procedure
7.1 Entering the calibration menu
With the indicator on and displaying weight, touch the “Menu / Help” key. The display
will read “Power off *”. Use the up / down arrows until the display reads “Calibrate
*”. Touch the “Print / Enter” key and the display should then show “Password”. At
this point key in the calibration password. (The default calibration password is “Zero”
“Zero” “Zero” .)
7.2 Keying in cal weight
The display will show “Cal weight ” and the cursor will be blinking. Using the up,
down, and right keys to enter the size of your calibration weight in pounds (i.e. 1, 2, 5,
or 10). Press “Enter” to accept the cal weight, or “Cancel” if you make a mistake.
7.3 Calibration Example
(Entering a 25.00 lb cal weight value.) The blinking cursor is the clue that you can enter
an arbitrary number using the up and down keys. Pressing the up/down keys will scroll
through the list (0 1 2 3 4 5 6 7 8 9 - . ) in turn. When the desired number appears (2),
press the right arrow “Menu / Help” key. The blinking cursor will advance one digit to
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