OHAUS BW Series User manual

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BW Series Compact Bench Scale
Báscula compacta de mesa de la Serie BW
Balance de table compacte, série BW

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BW SERIES COMPACT BENCH SCALE EN-1
1. INTRODUCTION ............................................................................... EN-2
1.1 Product Description................................................................. EN-2
1.2 General Features..................................................................... EN-2
1.3 Safety Precautions .................................................................. EN-2
2. INSTALLATION ................................................................................. EN-3
2.1 Unpacking ............................................................................. EN-3
2.2 Installing Components............................................................. EN-3
2.3 Selecting the Location ............................................................. EN-3
2.4 Leveling the Scale................................................................... EN-3
2.5 Connecting Power................................................................... EN-4
2.5.1 AC Power...................................................................... EN-4
2.5.2 Battery Power................................................................EN-4
2.6 Initial Calibration .................................................................... EN-4
3. OVERVIEW OF CONTROLS AND FUNCTIONS........................................ EN-5
4. OPERATIONS................................................................................... EN-6
4.1 Switching the Unit On and Off................................................... EN-6
4.2 Manual Tare........................................................................... EN-6
4.3 Zero Operation........................................................................ EN-6
4.4 Changing Weighing Units ........................................................ EN-6
5. SCALE SETTINGS ............................................................................. EN-7
5.1 Scale Increment...................................................................... EN-7
5.2 Backlight ............................................................................... EN-7
6. CALIBRATION AND SEALING............................................................. EN-8
6.1 Calibration ............................................................................. EN-8
6.2 Legal for Trade Sealing........................................................... EN-10
7. MAINTENANCE ............................................................................... EN-11
7.1 Cleaning............................................................................... EN-11
7.2 Troubleshooting..................................................................... EN-12
8. TECHNICAL DATA............................................................................ EN-13
8.1 Specifications........................................................................ EN-13
8.2 Drawings.............................................................................. EN-14
8.3 Compliance .......................................................................... EN-15
WARRANTY ......................................................................................... EN-16

EN-2 BW SERIES COMPACT BENCH SCALE
1. INTRODUCTION
This manual contains installation, operation and maintenance instructions for the BW
Series Compact Bench Scale. Please read the manual completely before installation
and operation.
1.1 Product Description
The BW Series Compact Bench Scale is an economical portioning, packing and
general weighing scale designed to provide fast and accurate weighing performance
in washdown environments. With an internal sealed rechargeable lead-acid battery,
IP65 housing and high-speed display update, the BW Series Compact Bench Scale
offers portability, durability and productivity in one practical design.
1.2 General Features
• Capacity models: 1.5kg/3lb, 3kg/6lb, 6kg/15lb, 15kg/30lb
• Single and dual display models
• Default and LFT displayed resolution 1:3,000
• High-profile ABS housing, stainless steel pan (pan is dishwasher-safe)
• IP65 dust and water jet protection
• 4-adjustable leveling feet with integrated front-panel leveling indicator
• Bright red LED weight display: 6-digit, 7-segment, 0.55”/14 mm high characters
• 4-button control panel: On/Units Off, Check, Tare, Zero
• 3-weighing units: g, oz, lb
• Battery charge indication
• AC power or 15-hour rechargeable lead-acid battery
• Over-Under checkweighing function with audible alarm
1.3 Safety Precautions
For safe and dependable operation of this scale, please comply with the
following safety precautions:
• Verify that the input voltage printed on the AC Adapter and the plug type
matches the local AC power supply.
• Make sure that the power cord does not pose an obstacle or tripping hazard.
• Disconnect the scale from the power supply when cleaning the scale.
• Do not operate the scale in hazardous or unstable environments.
• Do not drop loads on the platform.
• Use only approved accessories and peripherals, as available.
• Operate the scale only under ambient conditions specified in these instructions.
• Service should be performed by authorized personnel only.

BW SERIES COMPACT BENCH SCALE EN-3
2. INSTALLATION
2.1 Unpacking
Unpack and verify that the following components have been included:
• BW Scale Unit
• Weighing Pan
• AC-DC Adapter
• Instruction Manual
Save the packaging material. This packaging ensures the ideal protection for the
storage or transport of the product.
2.2 Transport Protection
BEFORE USING THE SCALE:
Remove the 3 shipping protection screws on
the spider sub-platform, then remove the 3 plastic
column inserts under the spider. Re-install the
protective components if shipping the scale to
ensure proper transport protection.
2.3 Selecting the Location
Operate the scale on a firm, level surface. Avoid locations with rapid temperature
changes, excessive air currents, vibrations, electromagnetic fields, heat or direct
sunlight.
2.4 Leveling the Scale
Adjust the leveling feet* until the bubble is centered in the circle of the level indicator
(located on the front panel). Ensure that the scale is level each time its location is
changed.
* IMPORTANT: To allow proper air flow and minimize condensation inside
the scale, unscrew the 2 rear leveling feet slightly, then level the scale accordingly
for normal operation. However, when cleaning the scale, all 4 leveling feet must be
screwed in tightly to avoid entry of water inside the scale.

EN-4 BW SERIES COMPACT BENCH SCALE
2.5 Connecting Power
2.5.1 AC Power
Verify that the intended AC power source matches the AC adapter rating. Unplug* the
rubber access cap underneath the scale, connect the adapter to the power receptacle
through the cut-out, then plug the AC adapter into a power outlet.
* NOTE: When cleaning the scale, turn off the unit, remove the AC adapter and plug
the rubber access cap securely to avoid entry of water inside the scale.
2.5.2 Battery Power
The scale will begin charging with the AC adapter connected accordingly, and auto-
matically switches to battery operation if there is a loss of power. Normal operating
time on a full charge is 50 hours on a 15-hour charge cycle.
Low battery charge is indicated by the flashing LED over the indicator.
AC power or a fully charged battery is indicated by the illuminated LED over the
indicator. A blinking indicates the battery is charging.
NOTES:
• DO NOT continuously charge the scale longer than 24 hours.
• To maximize battery power, the scale can be set up to enter Sleep mode
(only decimal points are displayed) after 2 minutes of inactivity, or auto-
matically turn off after 15 minutes of inactivity (Section 5.2).
• Charging the scale must be performed in a dry environment.
• Plug the rubber access cap to the adapter receptacle to ensure the scale
is protected when operated in a wet environment.
• If the scale is not used within 3 months, recharge and discharge the bat-
tery fully 3 times to maximize the battery condition.
• Dispose of the lead-acid battery according to local laws and regulations.
CAUTION
BATTERY IS TO BE REPLACED ONLY BY AN AUTHORIZED OHAUS
SERVICE DEALER. RISK OF EXPLOSION CAN OCCUR IF REPLACED
WITH THE WRONG TYPE OR CONNECTED IMPROPERLY.
2.6 Initial Calibration
When the scale is operated for the first time, a Span Calibration is recommended to
ensure accurate weighing results. Before performing the calibration, be sure to have
the appropriate calibration weights. Refer to Section 6 for calibration procedures.

BW SERIES COMPACT BENCH SCALE EN-5
3. OVERVIEW OF CONTROLS AND FUNCTIONS
• Turns the scale on
• Long-press turns the scale off
• Short-presses display successive units of measure
• In SETUP Mode, “Yes” accepts/confirms the displayed setting
• In CHECK Mode, accepts/confirms the displayed value
• Inputs the weight of the object on the weighing pan as a Tare value
• In SETUP Mode, “No” toggles through the available settings
• In CHECK Mode, increments the value of the selected digit
• Zeros the display
• With the scale off, long-press together with ON/UNITS OFF enters User Setup Mode
• In SETUP Mode, “Exit” ends setup and exits to “Save”
• In CHECK Mode, ends Over/Under setup and exits to weighing mode
• Initiates CHECK Over/Under setup
• In SETUP Mode, “Back” reverts to the previous parameter
• In CHECK Mode, shifts to the next digit
• LED annunciator indicates Center of Zero
• LED annunciator indicates battery is fully charged (blinking if charging)
UNDER • LED annunciator indicates displayed weight is less than the preset Under value
OVER • LED annunciator indicates displayed weight is more than the preset Over value
• LED annunciator blinks to indicate the battery voltage is low
NET • LED annunciator indicates Net (Gross minus Tare) value
g, oz, lb • LED annunciator indicates the active weighing unit
UNDER OVER NET
CHECK
ZERO
90
TARE
Yes
Exit
Back
No
oz
g
lb
CAPACITY: 3 lb x 0.001 lb
ON/UNITS
OFF

EN-6 BW SERIES COMPACT BENCH SCALE
4. OPERATIONS
4.1 Turning the Unit On and Off
With the scale off, press ON/UNITS OFF to turn on. Make sure the weighing pan is
empty before turning the scale on. Allow 15-30 minutes for the scale to warm up
before use. With the scale on, long-press ON/UNITS OFF to turn off.
4.2 Manual Tare
Place a container on the weighing pan, then press TARE. The display will show
a net value of “0” as the Tare weight is registered. Remove the container, and the
resulting negative value displayed will be equivalent to the Tare weight. To clear the
Tare value, press TARE with the pan empty.
4.3 Zero Operation
Press ZERO to zero the stable weight display (the weight must be within ±2% of
scale capacity). Center of Zero is indicated by the LED annunciator.
4.4 Checkweigh Target Setting
Compares the weight of an item against a pre-set Over-Under range.
To activate Checkweighing Mode, refer to user setup (Section 5.2).
• Press CHECK to initiate entering Over-Under parameters.
• The value of the “OVER” target limit will be displayed first, with the active digit
flashing (the “OVER” LED annunciator is lit).
• Enter the desired “OVER” limit value by pressing -No to increment the active digit or
-Back to shift to the next digit.
• Press -Yes to accept the displayed value and proceed to the “UNDER” target limit
(the “UNDER” LED annunciator is lit).
• Enter the desired “UNDER” limit value by pressing -No to increment the active digit
or -Back to shift to the next digit.
• Press -Exit to accept the displayed value and exit into checkweighing mode.
NOTES:
• “OVER” or “UNDER” LED annunciators will light if the weight of an item
placed on the pan is over or under the pre-set limits, respectively. “OVER”
and “UNDER” LED annunciators will light simultaneously if the weight is
within the pre-set limits.

BW SERIES COMPACT BENCH SCALE EN-7
• The LED indication is complemented by an audible alert feature (Sec. 5.2).
• Over-Under values are retained when the unit is turned off.
• Over-Under values are not retained when the weighing unit or resolution
setup are changed.
5. SCALE SETTINGS
5.1 Accessing the User Setup Mode
With the scale on, press ON/UNITS OFF and CHECK simultaneously. “SETUP” then
“S1 OFF” is displayed. To navigate in the User Setup Mode:
• Press ON/UNITS OFF -Yes to accept the displayed setting
• Press TARE-No to toggle through available settings
• Press ZERO-Exit to end setup and proceed to “Save”
• Press CHECK-Back to revert to the previous parameter
5.2 User Setup Parameters
Parameters Description Settings
S1 Scale automatically turns off after 15
minutes of inactivity.
ON - enables this function.
OFF -disables this function.
S2 Scale enters sleep mode after 2
minutes of inactivity.
ON - enables this function.
OFF -disables this function.
S3 CHECK activation and Alert Range 0- Check mode is off.
Scale beeps when displayed weight is:
1-...within the preset Over and Under values
2-...outside the preset Over and Under range
3-...within the preset Over and Under values (Over-Under LED’s do not
light within preset range)
4-...outside the preset Over and Under range (Over-Under LED’s do not
light within preset range)
5- Alarm is off (Over-Under LED’s do not light within preset range)
6- Alarm is off
S4 Averaging Level 0, 1, 2, 3 (most filtering, longer stabilization time)
4, 5, 6, 7 (corresponds to 0, 1, 2, 3 but with slower display update)
S5 Power-on Weighing Unit lb, oz, g
S6 LED Brightness Level 0,1,2,3 (dimmest).
dsp Display Type OFF - displays weight continuously.
ON - displays first stable weight.
Save Save or Abort Save - saves changes and reverts to weighing mode.
Abort - reverts to weighing mode without saving changes.
Note: Bold settings are defaults.

EN-8 BW SERIES COMPACT BENCH SCALE
6. CALIBRATION AND SEALING
6.1 Calibration
For best results, calibrate the scale at regular intervals. Temperature changes,
geographic gravity variations, altitude changes and abuse are few reasons why a
scale may need recalibration.
Note: The following procedure requires the use of hand tools and calibration
weights. If unable to perform the calibration, contact an authorized Ohaus service
organization.
1. Remove the battery cover to access the two calibration pins located in
a slot at the bottom of the scale. With the scale on under battery power,
short the calibration pins (a small slotted screwdriver may be used).
Note: When accessing the bottom of the scale, avoid placing the scale
upside down on the pan or sub-platform. Place the scale on its side.
2. “SEtUP” then the first parameter “CtY” is displayed.
3. Press -Yes successively to move through the succeeding parameters:
“dEF NO” “S1”, “S2”, “S3”, “S4”, “S5”, “S6”, “dSP”, “S8”, “S9”, “S10”,
“S11”, “S12”, “bAt”, “GEO”.
Note: Do not change the settings of these parameters. These are service
setup parameters intended for authorized servicing use only.
4. After “GEO”, “CAL NO” is displayed. Press -No to switch the setting to
“CAL YES”.
5. “CAL YES” is displayed. Press -Yes to enter calibration sequence.
Calibration Pins