OHAUS DS Series User manual

Instruction Manual
DS Series
Electronic Digital
Bench Scales
Ohaus Corporation
29 Hanover Road
Florham Park NJ
07932-0900

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.. ..
Unauthorized changes or modifications to this equipment are notUnauthorized changes or modifications to this equipment are not
Unauthorized changes or modifications to this equipment are notUnauthorized changes or modifications to this equipment are not
Unauthorized changes or modifications to this equipment are not
permitted. See manual for replacement parts.permitted. See manual for replacement parts.
permitted. See manual for replacement parts.permitted. See manual for replacement parts.
permitted. See manual for replacement parts.
NOTENOTE
NOTENOTE
NOTE:ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClass
A digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interfer-
ence when the equipment is operated in a commercial environment. This equipment
generates,uses,andcanradiateradiofrequencyenergyand,ifnotinstalledandused
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
harmfulinterference in which case the user willbe required to correct the interference
at his own expense.
This Class A, digital apparatus meets all requirements of the Canadian Interference.
Causing Equipment Regulations.
Cet appareil numerique de la classe A respecte toutes les exigences du Reglement
sur le material broilleur du Canada.
This device corresponds to requirements stipulated in 90/384/EEC and
features radio interference suppression in compliance with valid EC
Regulation 89/336/EEC. Note: The displayed value may be adversely
affectedunderextremeelectromagneticinfluences,eg.whenusingaradio
unitintheimmediatevicinityofthedevice. Oncetheinterferencehasbeen
rectified,theproductcanonceagainbeusedforitsintendedpurpose. Thedevicemay
have to be switched on again.
Cet appareil correspond aux exigences selon la norme 90/384/CEE et est déparasité
conformément à la directive de la CE 89/336/CEE en vigueur. Remarque: Dans des
conditionsd’influencesélectromagnétiquesextrêmes,parexempleencasd’exploitation
d’un appareil radio à proximité immédiate de I’appareil la valeur d’affichage risque
d’être influencée. Une fois que l’influence parasite est terminée, le produit peut être
de nouveau utilisé de manière conforme aux prescriptions; le cas échéant, il est
nécessaire de le remettre en marche.
Dieses Gerät entspricht den Anforderungen nach 90/384/EWG und ist funkentstört
entsprechend der geltenden EG-Richtlinie 89/336/EWG. Hinweis: Unter extremen
elektromagnetischenEinflüssenz.B.beiBetreibeneinesFunkgerätesinunmittelbarer
Nähe des Gerätes kann eine Beeinflussung des Anzeigewertes verursacht werden.
NachEndedesStöreinflussesistdasProduktwiederbestimmungsgemässbenutzbar,
ggfs. ist ein Wiedereinschalten erforderlich.

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TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
INTRODUCTION.................................................................................................. 4
DESCRIPTION..................................................................................................... 4
UNPACKING ........................................................................................................ 5
INSTALLATION.................................................................................................... 5
Leveling ......................................................................................................... 5
Power Options .............................................................................................. 5
AC Adapter ................................................................................................... 6
OPERATION ........................................................................................................ 6
Turning the Scale ON ................................................................................... 6
Turning the Scale OFF ................................................................................. 6
Checking Calibration ..................................................................................... 7
Weighing ....................................................................................................... 7
Taring ............................................................................................................ 8
Calibration ..................................................................................................... 9
Changing Units kg/lb................................................................................... 10
CARE AND MAINTENANCE ............................................................................. 11
TROUBLESHOOTING ....................................................................................... 11
Error Messages .......................................................................................... 12
SPECIFICATIONS ............................................................................................. 12
SERVICE INFORMATION ................................................................................. 13
PARTS INFORMATION ..................................................................................... 13
REPLACEMENT PARTS ................................................................................... 13
ACCESSORIES ................................................................................................. 13
LIMITED WARRANTY ....................................................................................... 14

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INTRODUCTION
This manual covers installation, operation and troubleshooting for the Ohaus DS
Series Bench Scales, Models DS4, DS10, DS10L, DS20L and DS44L. To ensure
proper operation of the scale, please read this manual completely.
DESCRIPTIONDESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
The Ohaus DS Series Bench Scales are precision industrial weighing instruments
whichcanbeusedforalmostanyapplication with capacities from 44 to 440 pounds or
20to200 kilograms. Thescaleisdesigned toprovideyearsofservice withvirtuallyno
maintenance. The DS series indicator is constructed using an extruded aluminum
housing which is anodized, contains a one piece PC board, a five digit LCD display
whichis0.8inchesinheight. Theindicatorisconnectedtotheplatformbyacoiledcord
and can be positioned up to eight feet from the platform for ease of viewing. The
platforms on Models DS4 and DS10 are constructed of stainless steel, and painted
steel on Models DS10L, DS20L and DS44L. The platforms are rugged and easily
cleaned. PowerissuppliedthroughanACAdapter/Chargerwhichisavailableinthree
configurations for world-wide usage. An internal Nickel Cadmium battery powers the
indicator, is rechargable and provides up to eight hours operation. Typical recharge
time is seven hours. Accessories include a tower to support the indicator at a higher
positiontopermiteasierviewingofthedisplayontheindicator. Anindicatorwallmount
is included with the DS Series Bench Scales.
DS Series Electronic Digital Bench Scale

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Leveling Feet
UNPACKINGUNPACKING
UNPACKINGUNPACKING
UNPACKING
DS Series Bench Scales are shipped with the following components:
•a platform
•a power adapter/charger
•an indicator unit
•a wall mounting bracket and screws
•this instruction manual
•a warranty card
Carefully unpack and verify that all items are on hand.
INSTALLATIONINSTALLATION
INSTALLATIONINSTALLATION
INSTALLATION
LevelingLeveling
LevelingLeveling
Leveling
ModelsDS10L,DS20L,andDS44L
areequippedwithadjustablelevel-
ing feet. Adjust the four leveling
feet under the platform to level it.
Power OptionsPower Options
Power OptionsPower Options
Power Options
All models may be operated using
the Power Adapter or the built-in
rechargeableNickelCadmiumbat-
teries.
Nickel Cadmium batteries will ini-
tiallyprovideapproximately3hours
of service before recharging is
needed. After 3 to 5 full chargingfull charging
full chargingfull charging
full charging
cyclescycles
cyclescycles
cycles, the battery will reach full
capacity providing a minimum of 8
hours of service. A full charging
cycle takes about 7 hours with the
display unit turned off.

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OPERATIONOPERATION
OPERATIONOPERATION
OPERATION
Turning the Scale ONTurning the Scale ON
Turning the Scale ONTurning the Scale ON
Turning the Scale ON
Withnoloadontheplatform,switch
the scale ON by pressing the ON/
OFF/RE-ZERO button.
When first switched ON, all seg-
ments of the display should be on
as shown in the illustration. This
displaycheckwillbedisplayedbrief-
ly,thenzerowillbedisplayed. When
zero is displayed, the balance is
ready for use.
Turning the Scale OFFTurning the Scale OFF
Turning the Scale OFFTurning the Scale OFF
Turning the Scale OFF
Press the ON/OFF/RE-ZERO but-
ton when zero is displayed.
OR
AC Adapter
Receptacle
AC AdapterAC Adapter
AC AdapterAC Adapter
AC Adapter
Connect the Power Adapter/
Charger to the receptacle on the
displayunit.Plugtheadapterintoa
convenient AC outlet.

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Checking CalibrationChecking Calibration
Checking CalibrationChecking Calibration
Checking Calibration
Before using the scale, calibration
should be verified. The scale has
beencalibratedbeforeshipment,how-
ever, calibration is influenced by fac-
tors such as:
•Variations in the earths gravita-
tional field at different latitudes of
the world.
•Rough handling.
•Changes in work location.
•Height above sea level.
Tocheckthescale’scalibration,place
a traceable calibration mass on the
center of the platform and read the
displayed weight.
Ifthedisplayedweightdiffersfromthe
traceable calibration mass by more
than acceptable limits, calibration is
required. RefertotheCalibrationsec-
tion and the Specifications at the rear
of the manual.
WeighingWeighing
WeighingWeighing
Weighing
1. Press ON/OFF/RE-ZERO to
rezero the display.
2. Place the object(s) or material
to be weighed on the platform
andread the weightonthedis-
play.

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TaringTaring
TaringTaring
Taring
Whenweighing material or objects
that must be held in a container,
taring stores the container weight
in the scale’s memory and sub-
tractsitfromthetotalweightonthe
platform.
1. Place an empty container on
the platform. Its weight will be
displayed.
2. Press
ON/OFF/RE-ZERO to
rezero the display. The
container’sweightwillbestored
in memory.
3. Add material to the container.
As material is added, its net
weight will be displayed.
4. Removing the container and
material from the platform will
cause the balance to display
the container’s weight as a
negative number.
Tared weight remains in balance
memory until
ON/OFF/RE-ZERO
is pressed again.

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CalibrationCalibration
CalibrationCalibration
Calibration
NOTENOTE
NOTENOTE
NOTE: This procedure requires that
thescale must beONmustbe ON
must beONmustbe ON
must beON. Calibrationcan
be in made in pounds or kilograms.
1. Remove all weights from the
platform.
2. Press ON/OFF/RE-ZERO to
turn ON the scale. The display
should show either 0.00 kg or
0.00 lb.
3. Press ON/OFF/RE-ZERO and
hold for fifteen secondsfifteen seconds
fifteen secondsfifteen seconds
fifteen seconds, the
display will show 0.00 kg or
0.00 lb. Release the ON/OFF/
RE-ZERO button, the display
will show in sequence 0 then
000 followed by CAL.
NOTENOTE
NOTENOTE
NOTE: If more than one weight is
used to calibrate, place them
on the scale at the same time.
4. Place a weight or weights on
the platform which equals the
full capacity of the scale. For
example, on Model DS4, a
weightof 20kgwouldbeused.
Whenthedisplay indicates the
weightontheplatform,remove
the weight(s).
5. Momentarily press the ON/
OFF/RE-ZERO button, the
scaleshouldnowbecalibrated
andthedisplayshouldindicate
0.00kg
NOTENOTE
NOTENOTE
NOTE: The display will alternate
between 000000
000000
000 and CALCAL
CALCAL
CAL all the
time until a weight is placed on
the platform or until the scale
turns off by the auto-shut-off
feature.

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Changing Units kg/lbChanging Units kg/lb
Changing Units kg/lbChanging Units kg/lb
Changing Units kg/lb
NOTENOTE
NOTENOTE
NOTE: When it is required to change
from lbto kg,orkg tolb,the scale mustmust
mustmust
must
be OFFbe OFF
be OFFbe OFF
be OFF before proceeding.
1. Remove all weights from the
platform.
2. Press ON/OFF/RE-ZERO and
hold for fifteen secondsfifteen seconds
fifteen secondsfifteen seconds
fifteen seconds, the
display will show 88888. Re-
lease the ON/OFF/RE-ZERO
button,thedisplaywillshowthe
current unit of measure.
3. Repeated pressing of the ON/
OFF/RE-ZERO button will
switchbetweenkgandlbonthe
display.
4. When the desired unit is dis-
played, press and hold the ON/
OFF/RE-ZERO button for an-
other
fifteensecondsfifteenseconds
fifteensecondsfifteenseconds
fifteensecondsandthen
release. The display will now
show the selected unit either
0.00 kg or 0.00 lb.
OR
OR

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REMEDY
Check power adapter
connections. Charge
batteries.
Press ON/OFF/RE-ZERO
with no weight on the
platform, then weigh item.
Recalibrate correctly.
See Error Messages.
PROBABLE CAUSE(S)
Power adapter not plugged
in or properly connected to
scale or batteries are low.
Scale was not re-zeroed
before weighing.
Scale not properly
calibrated.
SYMPTOM
Unit will not turn on.
Incorrect weight reading.
Error message display.
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
CARE AND MAINTENANCECARE AND MAINTENANCE
CARE AND MAINTENANCECARE AND MAINTENANCE
CARE AND MAINTENANCE
To keep the scale operating properly, the indicator and platform should be kept clean
and free from foreign material. If necessary, a cloth dampened with a mild detergent
may be used. Keep calibration weights in a safe dry place.

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Error MessagesError Messages
Error MessagesError Messages
Error Messages
Overload: The load on the platform exceeds the
capacity of the scale.
Underload: Platform has been removed.
Low Battery: NiCad battery pack must be charged.
Models DS4 DS10 DS10L DS20L DS44L
Capacity (lb) 44 110 110 220 440
Readability (lb) 0.02 0.05 0.05 0.1 0.2
Capacity (kg) 20 50 50 100 200
Readability (kg) 0.01 0.02 0.02 0.05 0.1
All Models
Linearity 3 divisions
Auto zero tracking
capture range 0.5 divisions
Tare range To Capacity by Subtraction
Over range capacity Capacity + 9 divisions
Stabilization time 3 seconds
Shift accuracy ± 1 division
Operating temperature 32° to 104°F/0° to 40° C
Weighing system 4 corner strain gauge load cells
Display (in/cm) LCD (0.8/2 high)
Power requirements Built in NiCad rechargeable battery pack or
AC Adapter/Charger: 120, 220, 240 V ac
Platform size (in/cm) 12.2 x 1.4 x 10.8/ 20.5 x 2.7 x 15.7/
(W x H x D) 31 x 3.6 x 27.4 52.1 x 6.9 x 40
Indicator size (in/cm) 10.2 x 2.4 x 5.5/
(W x H x D) 25.9 x 6.1 x 5.5
Net weight (lb/kg) 8.8/4 33/15
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS