Ohaus JR User Manual
Ohaus Corporation
29 Hanover Road
Florham Park NJ
07932-0900
PRECISION
Electronic Balances
JR Series
Standard
Instruction Manual
NOTE:NOTE:
NOTE: THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO
NOTE:NOTE:
COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES.
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.
THIS DIGITAL APPARATUS DOES NOT EXCEED THE CLASS A LIMITS FOR RADIO NOISE EMISSIONS FROM DIGITAL APPARATUS AS
SET OUT IN THE INTERFERENCE-CAUSING EQUIPMENT STANDARD ENTITLED “DIGITAL APPARATUS”, ICES-003 OF THE
DEPARTMENT OF COMMUNICATIONS.
CET APPAREIL NUMERIQUE RESPECTE LES LIMITES DE BRUITS
RADIOELECTRIQUES APPLICABLES AUX APPAREILS NUMERIQUES
DE CLASSE A PRESCRITES DANS LA NORME SUR LE MATERIEL
BROUILLEUR : “APPAREILS NUMERIQUES”, NMB-003 EDICTEE PAR
LE MINISTRE DES COMMUNICATIONS.
Unauthorized changes or modifications to this equipment are not
permitted.
2
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
INTRODUCTION .................................................................................................. 5
DESCRIPTION ..................................................................................................... 5
UNPACKING ........................................................................................................ 6
INSTALLATION .................................................................................................... 7
Environment .................................................................................................. 7
Draft Shield ................................................................................................... 7
Pan and Pan Support .................................................................................... 8
AC Adapter.................................................................................................... 8
OPERATION ........................................................................................................ 9
Turning the Balance ON................................................................................ 9
Stabilization ................................................................................................... 9
Auto Range Models....................................................................................... 9
Checking Calibration ................................................................................... 10
Weighing .................................................................................................... 10
Taring .......................................................................................................... 11
USING MENUS TO CONFIGURE THE BALANCE ........................................... 12
CALIBRATION MENU ........................................................................................ 13
Calibration Menu Protection ........................................................................ 13
Calibration Weights ..................................................................................... 13
Span Calibration.......................................................................................... 14
Linearity Calibration .................................................................................... 15
End .............................................................................................................. 16
USER MENU ...................................................................................................... 17
User Menu Protection ................................................................................. 17
Reset to Factory Defaults............................................................................ 18
Averaging Level .......................................................................................... 19
Stability Range ............................................................................................ 20
Auto-Zero .................................................................................................... 20
End .............................................................................................................. 21
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SETUP MENU .................................................................................................... 22
Setup Menu Protection................................................................................ 22
Unit Selection .............................................................................................. 23
Lock Switch ................................................................................................. 24
End .............................................................................................................. 25
MENU LOCK-OUT PROTECTION..................................................................... 25
CARE AND MAINTENANCE.............................................................................. 26
TROUBLESHOOTING ....................................................................................... 26
Error Codes................................................................................................. 27
SERVICE INFORMATION ................................................................................. 28
SPECIFICATIONS ............................................................................................. 29
PARTS INFORMATION ..................................................................................... 30
REPLACEMENT PARTS ................................................................................... 30
ACCESSORIES ................................................................................................. 30
LIMITED WARRANTY........................................................................................ 31
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INTRODUCTION
This manual covers installation, operation and troubleshooting for the Ohaus Precision
Standard balances, Models JR120, JR200, JR400, JR400D, JR600, JR2K, JR4K and
JR4KD. To insure proper operation of the balance, please read this manual completely.
DESCRIPTIONDESCRIPTION
DESCRIPTION
DESCRIPTIONDESCRIPTION
The Ohaus Precision Standard series balances are precision weighing instruments,
designed to provide years of service with virtually no maintenance. The Precision
Standard series is constructed using a die-cast aluminum base finished with a durable
epoxy powder paint which is resistant to commonly used acids, contains a one piece
solid-state precision electronics PC board, a seven digit LCD display which is 0.6 inches
in height. All Precision Standard series balances are factory set to measure in grams.
Each balance operates through a series of menus which enable precise calibration and
linearity along with various other parameters which enhances operation. A built in lock
switch prevents preset settings from being changed. To prevent measurements from
being affected by air currents, a draft shield is used on Models JR120, JR200 and
JR400D balances. Power is supplied through an AC adapter which is available in five
voltages for world-wide usage. Accessories include: an RS232 interface kit which
allows printing of results through an external computer, an RS232 Interface cable with
a print switch, weigh below hook, security device and calibration weights.
PRECISION
Standard
5
Balance
UNPACKINGUNPACKING
UNPACKING
UNPACKINGUNPACKING
Your Precision Standard balance was shipped with the following items:
• a pan
• a pan support
• an AC power adapter
• a draft shield (JR120, JR200 and JR400D only)
includes draft shield and snap clamp
• this instruction manual
• your warranty card
It is recommended to save the carton and packing material for storing , transporting the
balance or returning it for service.
Precision Standard
Balance
Round Pan
(Round pan and support
for Models JR120,
JR200, JR400, JR600,
and JR400D)
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Square Pan
Pan SupportAC Adapter Pan Support
(Square pan and support for
Models JR2K, JR4K and
JR4KD)
INSTALLATIONINSTALLATION
INSTALLATION
INSTALLATIONINSTALLATION
EnvironmentEnvironment
Environment
EnvironmentEnvironment
The balance should always be used in an environment which is free from excessive air
currents, corrosives, vibration, and temperature or humidity extremes. These factors
will affect displayed weight readings.
DO NOT install the balance:
• Next to open windows or doors causing drafts or rapid temperature changes.
• Near air conditioning or heat vents.
• Near vibrating, rotating or reciprocating equipment.
• Near magnetic fields or equipment that generates magnetic fields.
• On an unlevel work surface.
Draft Shield (JR120, JR200 and JR400D)Draft Shield (JR120, JR200 and JR400D)
Draft Shield (JR120, JR200 and JR400D)
Draft Shield (JR120, JR200 and JR400D)Draft Shield (JR120, JR200 and JR400D)
To install the draft shield:
1. Position the draft shield on top of
the balance as shown.
Make sure the rib at the
front of the draft shield
base butts up against the
raised lip of the display
panel.
2. The snap clamp should be oriented so that the double clip
is toward the front of the
balance.
Insert the double clip of the
snap clamp into the opening
in the draft shield base, and clip
the draft shield base to the balance.
Press the rear clip of the snap clamp
into place.
Position rib up against
display panel.
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Pan and Pan SupportPan and Pan Support
Pan and Pan Support
Pan and Pan SupportPan and Pan Support
Square PanSquare Pan
Square Pan
Square PanSquare Pan
Insert the pan support into the hole in the
weighing mechanism as shown in the illustration. Make sure the hole in the pan
support faces the rear of the balance.
Once installed, the pan support should not
rotate.
The pan has a guide pin which protrudes
from the bottom. Place the pan on the
support making sure the guide pin is inserted in the hole in the pan support.
Round PanRound Pan
Round Pan
Round PanRound Pan
Insert the pan support into the hole in the
weighing mechanism.
PAN
SUPPORT
PAN
SUPPORT
Place the pan on the support.
AC AdapterAC Adapter
AC Adapter
AC AdapterAC Adapter
Plug the molded connector of the adapter
into the receptacle at the rear of the balance. Plug the adapter into a convenient
AC outlet. When power is applied to the
balance, it will begin a self test cycle.
During this time, the display will count
down from 10 and display the word CHEC.
AC ADAPTER
RECEPTACLE
8
OPERATIONOPERATION
OPERATION
OPERATIONOPERATION
Turning the Balance ONTurning the Balance ON
Turning the Balance ON
Turning the Balance ONTurning the Balance ON
With no load on the pan, turn the balance
ON by pressing the ON TARE button.
When first switched ON, all segments of
the display should be on as shown in the
illustration.
This display check will be displayed briefly,
then the model number of the balance,
followed by a short countdown. The display will momentarily blank and then indicate zero. All of the displays shown at the
right only appear during initial power-up.
StabilizationStabilization
Stabilization
StabilizationStabilization
Before initally using the balance, allow
time for it to adjust to changes in environment. The balance need only be plugged
in to warm up. Recommended warm up
period is thirty minutes.
Auto Range ModelsAuto Range Models
Auto Range Models
Auto Range ModelsAuto Range Models
(JR400D and JR4KD)(JR400D and JR4KD)
(JR400D and JR4KD)
(JR400D and JR4KD)(JR400D and JR4KD)
•
•
•
Auto range balances offer both a fine
range (lower capacity/higher readability)
and a coarse range (higher capacity/lower
readability). When first turned on, the balance is in the fine range. It remains in this
range until the weight on the pan exceeds
the fine range capacity. When weight on
the pan is greater than the fine range
capacity, the balance switches to the
coarse range.
If weight on the pan falls back to within the
fine range capacity, coarse range readability remains in effect until you tare the
balance with no weight on the pan.
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Checking CalibrationChecking Calibration
Checking Calibration
Checking CalibrationChecking Calibration
Before using the balance, calibration
should be checked. The balance has been
calibrated before shipment, however, it
could be influenced by factors such as:
• Variations in the earths gravitational
field at different latitudes of the world.
• Rough handling.
• Changes in work location.
• Height above sea level.
To check the balance’s calibration, place
a known mass on the center of the pan and
read the displayed weight.
If the displayed weight differs from the
known weight by more than acceptable
limits, refer to the Calibration Menu and
the Specifications at the rear of the manual.
WeighingWeighing
Weighing
WeighingWeighing
STABILITY
INDICATOR
ONON
ON
1. Press to rezero the display.
ONON
TARETARE
TARE
TARETARE
2. Place the object(s) or material to be
weighed on the pan.
3. Wait for the stability indicator to appear before reading the weight.
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