Symmetry PR series Manuel utilisateur
PR Series
Precision Toploading Balances
USER MANUAL
(Software Revision: 2.35)
P.N. 8190, Revision A1, September 2006
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P.N. 8190, Revision A1, September 2006
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P.N. 8190, Revision A1, September 2006
CONTENTS
1.0 INTRODUCTION ..........................................................................................................4
2.0 TECHNICAL SPECIFICATIONS...................................................................................5
3.0 UNPACKING THE BALANCE.......................................................................................6
4.0 LOCATING THE BALANCE..........................................................................................6
5.0 SETTING UP THE BALANCE ......................................................................................7
5.1 ASSEMBLING THE BALANCE .............................................................................7
5.2 LEVELLING THE BALANCE.................................................................................7
5.3 WARM-UP TIME ...................................................................................................7
6.0 DISPLAY...................................................................................................................8
7.0 KEYPAD.......................................................................................................................9
7.1 NUMERIC ENTRY METHOD................................................................................9
8.0 INPUT/OUTPUT .........................................................................................................10
9.0 OPERATIONS............................................................................................................11
9.1 INITIALISATION..................................................................................................11
9.2 PASSCODES......................................................................................................11
9.3 WEIGHING..........................................................................................................12
9.3.1 Weighing Units.............................................................................................12
9.4 FUNCTIONS........................................................................................................13
9.4.1 Parts Counting..............................................................................................13
9.4.2 Percent Weighing.........................................................................................14
10.0 CALIBRATION..........................................................................................................15
11.0 RS-232 INTERFACE ................................................................................................16
12.0 ERROR CHECKING.................................................................................................19
13.0 SUPERVISOR MENUS ............................................................................................20
13.1 ENABLE WEIGHING UNITS...............................................................................20
13.2 ENABLE WEIGHING MODES.............................................................................21
13.3 ENABLE SERIAL INTERFACE PARAMETERS..................................................21
13.4 SETUP PARAMETERS.......................................................................................23
13.5 CALIBRATION SETUP........................................................................................24
13.6 PASSCODES......................................................................................................25
13.6.1 Forgotten Passcodes ...................................................................................25
14.0 SAFETY AND MAINTENANCE ................................................................................26
15.0 TROUBLE-SHOOTING.............................................................................................26
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P.N. 8190, Revision A1, September 2006
1.0 INTRODUCTION
Thank you for selecting the Precision Balance.
This Instruction Manual will familiarise you with the installation, trouble-
shooting, general maintenance of the balance, etc. and will guide you through
the various applications.
Please read this Manual thoroughly before starting the operation. If you need
any clarifications, feel free to contact your supplier.
PRODUCT OVERVIEW
This Precision Balance is ideal for laboratory and general purpose weighing.
FEATURES:
•Large easy to read LCD display with backlight
•Applications include weighing, parts counting and percentage
weighing
•External calibration
•Bi-directional RS-232 interface
•Can be configured to print a GLP Compliant report after each
calibration to include the time, date, balance number and a
verification of the calibration
•Automatic temperature compensation
•Display in 4 languages- English, French, German and Spanish
•Multiple weighing units
•Date and time
•Easy to use, sealed keypad
•Below balance weighing facility
•Password protection
•Security locking point
•Robust metal casing
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P.N. 8190, Revision A1, September 2006
2.0 TECHNICAL SPECIFICATIONS
210g model 410g model 2200g model 4200g model
Maximum
capacity 210g 410g 2200g 4200g
Readability 0.001g 0.01g
Typical
Repeatability 0.002g 0.02g
Linearity (±) 0.003g 0.03g
Tare range Full
Units of
measure grams, milligrams, kilograms, carats, pennyweights, grains,
troy ounce, ounces
Interface RS-232 bi-directional
Operating
temperature 10°C - 40°C
Power supply 15 VDC, 50/60 Hz, 800 mA
Calibration External
(Selectable automatic calibration due to change in time or temperature)
Display Backlit LCD with dual digits (24 mm high)
Draught
shield Supplied as standard for 0.001g units
Housing Die cast aluminium housing
With glass draught shield (for 0.001 g units)
Pan size 140 mm x 140 mm /
5.5” x 5.5” 200 mm x 175 mm /
7.9” x 6.9”
Overall
dimensions
(w x d x h)
251 × 358 × 104 mm /
10” x 14.3” x 4.2”
Net weight 5.5 kg / 12 lb
Applications Weighing, Parts counting, Percentage weighing
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3.0 UNPACKING THE BALANCE
Remove the balance from the packing by carefully lifting it out of the box.
Inside the box you will find everything needed to start using the balance-
AC adapter
Four plastic pan supports
Stainless Steel Top Pan
Breeze / draught shield (For 0.001g models)
This User Manual
4.0 LOCATING THE BALANCE
•The balance should not be placed in a
location that will reduce the accuracy.
•Avoid extremes of temperature. Do not place
in direct sunlight or near air conditioning
vents.
•Avoid unsuitable tables. The table or floor
must be rigid and not vibrate.
•Avoid unstable power sources. Do not use
near large users of electricity such as welding
equipment or large motors.
•Do not place near vibrating machinery.
•Avoid high humidity that might cause
condensation. Avoid direct contact with water.
Do not spray or immerse the balances in
water.
•Avoid air movement such as from fans or
opening doors. Do not place near open
windows or air-conditioning vents.
•Keep the balance clean. Do not stack material
on the balances when they are not in use.
P.N. 8190, Revision A1, September 2006
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5.0 SETTING UP THE BALANCE
5.1 ASSEMBLING THE BALANCE
•Locate the balance on a solid surface, free from vibration
•Gently place the 4 pan supports (if not already fitted) and then the
stainless steel pan on the weighing platform
•Place the windshield frame and the top cover around the pan (for
0.001g models)
•Level the balance using the adjustable feet and spirit level
•Connect power to the balance
•For best performance, let the balance warm up for 30-60 minutes and
calibrate before using
5.2 LEVELLING THE BALANCE
After placing the balance in a suitable place,
level it by using the spirit level on the rear of the
balance. To level the balance turn the two
adjustable feet at the rear of the balance until
the bubble in the spirit level is centred.
5.3 WARM-UP TIME
Attach the power supply cable to the connector
on the rear of the balance. Plug the power
supply module into the mains. The display will
indicate the balance serial number (if set) and
the software revision number followed by the
capacity of the balance. Next the balance will
run a self-test by displaying all segments and
then will show zeroes accompanied by the zero
symbol. If the balance serial number is not set,
the display will show dashes.
Before you start weighing, you have to wait for the balance to achieve a
stable internal temperature. Typical initial warm-up time suggested for a
balance already at room temperature is about 1 hour.
A stable sign ~ is shown when the balance is in
stable condition. It will turn off if the balance is
not stable. Exact zero is shown when the “0“
symbol is on to the left of the display area.
P.N. 8190, Revision A1, September 2006
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6.0 DISPLAY
This display includes areas for the weight value (up to 7
digits), symbols for common weighing units, tare, stability, zero
and low battery and a text area for menu.
The LCD has 7 x 7-segment digits for the weight and 10 x 14 -
segment digits for messages, symbols for weighing units and
indicators such as stability etc.
The 14 segment digits area is used to display messages
concerning operation or errors.
The 10 digit text area is used to display the current weighing
mode or to guide the user through the operation.
SYMBOLS AND INDICATORS
The LCD has unique symbols to indicate the following:
0Zero
Stable
g, oz, ozt, GN, dwt,
ct, Kg, mg, Pcs, % Text is shown for the weighing units and
modes
“CAL” When calibration is occurring or about to occur
“ºC” When a temperature is shown or a calibration
is requested due to change in temperature
“ti” For a time driven calibration
“Net” When a net weight is shown
P.N. 8190, Revision A1, September 2006
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7.0 KEYPAD
The keypad has the following keys to operate the balance.
Keys Primary function Secondary function
[On/Off] To turn the balance to ON or
OFF -
[Tare] or [Esc] A combined zero and tare
function To escape from setup
functions and modes
[Cal] / or
[Up]
Starts the calibration function
To increment or change a
displayed value or scroll
through options forward
[Print] / or
[Back] Instructs the balance to print
data To advance a flashing digit
by one position to the left
[Setup]/
or [Enter] Enters a function To save a value during
setting up a function such
as entering unit weight
[Mode] / or
[Advance] Selects functions by cycling
through a set of enabled
functions, for example parts
counting or percent weighing
To advance a flashing digit
by one position to the right
To go back by one step
during setup functions
[Units] / or
[Down] Selects weighing units by
cycling through a set of
enabled units
To decrement or change a
displayed value or scroll
through options backwards
[Mode] / or
[Advance] Selects functions by cycling
through a set of enabled
functions, for example parts
counting and percent weighing
To advance a flashing digit
by one position to the right
To go back by one step
during setup functions
7.1 NUMERIC ENTRY METHOD
To set a value when required, use the keys as given below-
- [Up] and [Down] keys to increase or decrease the flashing digit,
- [Advance] and [Back] keys to advance or move back the digit and
- [Enter] key to accept the value
P.N. 8190, Revision A1, September 2006
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8.0 INPUT/OUTPUT
The rear panel has connectors for RS-232 serial and
buffered I2C-bus interfaces and a power input socket.
Required power input is a low-voltage external supply,
15VDC @ 800mA.
Various communication options, e.g. USB, LAN, Wireless,
will be implemented in the future via add-on “black-boxes”
which will convert the RS-232 serial output or I2C to the
desired protocol. The basic unit includes RS-232 serial
communications only.
P.N. 8190, Revision A1, September 2006
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