Symmetry 124, 213, 413, 2202, 214 User Manual

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Precision Balance Series

User Manual

Analytical & Toploader Models

Version 1.00 Effective 22Dec2014 Part Number: 3.01.6.6.12483

Software rev.: V3.08 & above (Force Motor Models) V4.08 & above (Load Cell Models)

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TABLE OF CONTENTS

1 KNOW YOUR BALANCE .............................................................................................................................................. 3

2 PRODUCT OVERVIEW ................................................................................................................................................ 4

3 SPECIFICATIONS ........................................................................................................................................................ 5

3.1 Precision Analytical Models ............................................................................................................................. 5

3.2 Precision Toploading Models ........................................................................................................................... 6

3.3 Toploading Models .......................................................................................................................................... 7

4 UNPACKING & ASSEMBLING THE BALANCE .............................................................................................................. 8

5 LOCATING THE BALANCE ......................................................................................................................................... 11

6 SETTING UP THE BALANCE ...................................................................................................................................... 12

6.1 First Steps ...................................................................................................................................................... 12

6.1.1 Levelling the balance .............................................................................................................................. 12

6.1.2 Warm-Up Time ....................................................................................................................................... 12

6.2 CALIBRATION ................................................................................................................................................. 12

6.2.1 Manual Calibration ................................................................................................................................. 12

6.2.2 Calibration using External Calibration mass ........................................................................................... 12

6.2.3 Automatic Calibration............................................................................................................................. 13

6.2.4 Calibration Errors .................................................................................................................................... 13

7 DISPLAY ................................................................................................................................................................... 15

7.1 SYMBOLS AND TEXT ....................................................................................................................................... 15

8 KEYPAD .................................................................................................................................................................... 16

8.1 NUMERIC ENTRY METHOD ............................................................................................................................ 17

9 INPUT/OUTPUT ....................................................................................................................................................... 18

10 OPERATIONS ........................................................................................................................................................ 19

10.1 INITIALISATION .............................................................................................................................................. 19

10.2 PASSCODES .................................................................................................................................................... 19

10.3 WEIGHING ..................................................................................................................................................... 20

10.4 FUNCTIONS .................................................................................................................................................... 21

10.4.1 Parts Counting .................................................................................................................................... 22

10.4.2 Percent Weighing ............................................................................................................................... 23

10.4.3 Dynamic (Animal) Weighing ............................................................................................................... 24

10.4.4 Density Determination ....................................................................................................................... 26

11 RS-232 INTERFACE ............................................................................................................................................... 28

11.1 HARDWARE .................................................................................................................................................... 28

11.2 STANDARD FORMAT ...................................................................................................................................... 29

11.3 INPUT COMMANDS USING REMOTE KEYS..................................................................................................... 29

11.3.1 Invalid Input Command: ..................................................................................................................... 30

12 ERROR CHECKING ................................................................................................................................................ 32

13 SUPERVISOR MENUS ........................................................................................................................................... 33

13.1 ENABLE WEIGHING UNITS ............................................................................................................................. 33

13.2 ENABLE WEIGHING MODES ........................................................................................................................... 33

13.3 ENABLE SERIAL INTERFACE PARAMETERS ..................................................................................................... 33

13.4 FORMAT OF CUSTOM FORMS #1 and #2 ....................................................................................................... 34

13.5 SETUP PARAMETERS ...................................................................................................................................... 35

13.6 CALIBRATION SETUP ...................................................................................................................................... 36

13.7 PASSCODES .................................................................................................................................................... 37

14 PERIPHERALS ....................................................................................................................................................... 38

14.1 DENSITY DETERMINATION KIT ....................................................................................................................... 38

14.2 ANTI-VIBRATION TABLE ................................................................................................................................. 38

14.3 THERMAL PRINTER ........................................................................................................................................ 38

14.4 REMOTE DISPLAY ........................................................................................................................................... 38

15 SAFETY AND MAINTENANCE................................................................................................................................ 39

16 TROUBLE-SHOOTING ........................................................................................................................................... 39

16.1 TROUBLE-SHOOTING GUIDE. ......................................................................................................................... 40

17 REPLACEMENT PARTS AND ACCESSORIES ........................................................................................................... 43

18 SERVICE INFORMATION ....................................................................................................................................... 44

19 BALANCE MENU STRUCTURE............................................................................................................................... 45

20 WARRANTY INFORMATION ................................................................................................................................. 48

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1 KNOW YOUR BALANCE

This Instruction Manual will familiarise you with the installation, use, general maintenance etc. of the balance, and will guide you through the various applications. It also covers accessories, trouble-shooting, after sales service information, and other important information.

These balances are highly accurate precision instruments and contain sensitive mechanisms and components. They should be transported and handled with care. When in operation, be careful to place loads gently on the weighing surface and do not overload or exceed recommended maximum capacity of the instrument or damage may occur.

Please read this Manual thoroughly before starting operation. If you need any clarifications, feel free to contact your supplier or manufacturer.

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2 PRODUCT OVERVIEW

These balances are ideal for laboratory and general purpose weighing. They can also be used for some advanced weighing functions.

FEATURES:

 External menu-driven calibration allowing user-selectable range of calibration

weights.

 Internal calibration (option) for outstanding accuracy without the need for manual

calibration.

 Mains powered with some models offering rechargeable battery pack option for

cordless use.

 Solid die-cast aluminium alloy construction with 304 grade stainless steel pan for

durability and easy cleaning.

 Large easy to read LCD display with backlight.  Standard applications include weighing, percentage weighing, parts counting,

dynamic / animal weighing (some models), and solid and liquid density determination (some models).

 Bi-directional RS-232 interface as standard (with optional RS232 to USB convertor

accessory), integrated USB interface (some models).

 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.

 Force-restoration mechanism for supreme accuracy, or alloy load cell technology

for stable yet accurate weighing.

 Automatic temperature compensation.  Multiple weighing units.  Easy to use, wipe-clean sealed membrane keypad.  Below balance weighing facility.  Display in up to 4 languages – English & German as standard. French & Spanish

on some models.

 Password protection.  Security locking point.

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3 SPECIFICATIONS

3.1 Precision Analytical Models

(Suffix e for external calibration models, Suffix i for internal calibration models)

Model #

124

214

224

Maximum Capacity

120 g

210 g

220 g

Readability (d)

0.0001 g

Number of intervals n=

1200000

2100000

2200000

Recommended min. weight

0.01 g

Repeatability (Std. Dev)

0.00015 g

0.0002 g

Linearity +

0.0002 g

Units of Measure

grams, milligrams, carats, grains, ounces, troy ounces, pennyweight,

(some models feature mommes, custom unit).

Stabilization Time

Typically 3 seconds

Operating Temp

10ºC to 40ºC recommended

Power Supply

External mains power adapter - supplied as standard

(Input Voltage 100–240 VAC, 50/60 Hz)

Input Voltage

18 VDC - 830 mA

Weighing mechanism

Force Restoration Balance Motor

Calibration

External calibration as standard, internal calibration optional

External Calibration Mass

Fixed value: Recommended OIML class: E2, ASTM/ANSI class: 1

100 g

100 g or 200 g

Display

LCD with blue backlight, 7 characters, 20 mm high, plus symbols

Draft Shield (w x d x h)

Sliding door Draft Shield (132 x 142 x 233 mm)

Pan Size

Round, 90mm diameter

Overall Dimensions (w x d x h)

220 x 310 x 323 mm

8.7 x 12.2 x 12.7 in

Net Weight

5.2 kg / 11 lb 8 oz

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3.2 Precision Toploading Models

(Suffix e for external calibration models, Suffix i for internal calibration models)

Model #

213

413

Maximum Capacity

210 g

410 g

Readability (d)

0.001 g

Number of intervals n=

210000

410000

Recommended min. weight

0.1 g

Repeatability (Std. Dev)

0.002 g

Linearity +

0.002 g

Units of Measure

grams, milligrams, carats, grains, ounces, troy ounces, pennyweight,

(some models feature mommes, custom unit).

Stabilization Time

Typically 3 seconds

Operating Temp

10ºC to 40ºC recommended

Power Supply

External mains power adapter - supplied as standard

(Input Voltage 100–240 VAC, 50/60 Hz)

Battery pack included with some models.

Input Voltage

18 VDC - 830 mA

Weighing mechanism

Precision Load Cell

Calibration

External calibration as standard, internal calibration option.

External Calibration Mass

Fixed value: Recommended OIML class: E2, ASTM/ANSI class: 2

100 g, 200 g

200 g, 400 g

Display

LCD with blue backlight, 7 characters, 20 mm high, plus symbols

Draft Shield (w x d x h)

Square toughened glass draft shield With alloy Lid (160 x 160 mm)

Pan

Square 304 stainless steel, 130 X 130 mm

Overall Dimensions (w x d x h)

220 x 310 x 90 mm without breeze shield

8.7 x 12.2 x 3.5 in

Net Weight

3.1 kg / 6 lb 12 oz

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3.3 Toploading Models

(Suffix e for external calibration models, Suffix i for internal calibration models)

Model #

2202

4202

5001

10001

15001

Maximum Capacity

2200 g

4200 g

5000g

10 kg

15 kg

Readability (d)

0.01 g

0.1g

0.1 g

220000

420000

50000

100000

150000

Min

0.2 g

2 g

Repeatability (Std. Dev)

0.02 g

0.2g

Linearity +

0.04 g

0.4g

Units of Measure

kilograms, grams, carats, grains, ounces, troy ounces

(some models feature pounds, ounces, lb:oz, mommes, custom unit).

Stabilization Time

Typically 3 seconds

Operating Temp

10ºC to 40ºC recommended

Power Supply

External mains power adapter - supplied as standard

(Input Voltage 100–240 VAC, 50/60 Hz)

Battery pack included with some models.

Input Voltage

18 VDC - 830 mA

Weighing mechanism

Precision Load Cell

Calibration

External calibration as standard,

internal calibration optional

External calibration as standard

External Calibration Mass

Fixed value: Recommended OIML

class: F1, ASTM/ANSI class: 3

Fixed value: Recommended OIML class: F2,

ASTM/ANSI class: 4

1 kg, 2 kg

2 kg, 4 kg

2 kg, 5 kg

5 kg, 10 kg

Display

LCD with blue backlight, 7 characters, 20 mm high, plus symbols

Draft Shield (w x d x h)

None

Pan Size

Trapezoidal, 165 mm X 180 mm sides

Overall Dimensions (w x d x h)

220 x 310 x 90 mm

8.7 x 12.2 x 3.5 in

Net Weight

3.4 kg / 7 lb 8 oz

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4 UNPACKING & ASSEMBLING 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 mains power adapter & cord  Stainless Steel Top Pan  Alloy sub-pan  Draught shield (for mg models only)  User documentation

Locate the balance on a solid surface, free from vibration.

For some models, remove the shipping protection screw and transit disc from the top of the balance and place the top pan support on the balance. Do not use excessive force when removing and installing the screw.

Gently place the pan support into the receptacle and secure with the supplied screw. To not over-tighten the screw. It should be finger tight only. Put the Stainless steel pan on top of the pan support.

If supplied, place the draught shield frame and the top cover around the pan.

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5 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.

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6 SETTING UP THE BALANCE

6.1 First Steps

6.1.1 Levelling the balance

After placing the balance in a suitable place, level it by using the spirit level on the front 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.

6.1.2 Warm-Up Time

Insert the power supply cable DC connector 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 followed by a symbol indicating the balance is in busy mode. If the balance serial number is not set the display will show dashes. The display will show zeroes accompanied by the 0 symbol.

Before you start weighing, you have to wait for the balance to achieve a stable internal temperature.

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 visible on the left of the display area.

6.2 CALIBRATION

Units with an ‘i’ suffix can be calibrated using either internal calibration mechanism or by

using an external mass. Units with an ‘e’ suffix can only be calibrated with an external

mass. Internal calibration option must be enabled in the setup menu options or else external calibration mode will be used when the [Cal] key is pressed.

6.2.1 Manual Calibration

Pressing the [Cal] key will start calibration. Calibration can also be initiated by a change in internal temperature or a set time period as determined by the user.

Pressing [0/T] will abort the calibration at any time

6.2.2 Calibration using Internal Calibration mass (if fitted)

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On pressing the [Cal] key the display will show the busy symbol and a line of dashes and then after a few seconds will display ‘CALIbrA’. Then the busy symbol and a line of

dashes will reappear, followed by ‘CAL On’. Then ‘CALIbrA’ will appear again, followed by

the busy symbol and a line of dashes. Finally ‘CAL OFF’ will be displayed, followed by a beep and the busy symbol and a line of dashes. A final beep will sound the end of calibration and the display should return to ‘0.000 g’ or similar. Internal calibration is now complete and normal operations may be continued.

6.2.3 Calibration using External Calibration mass

Note: Calibration mass used should be a known accurate item, ideally with an OIML or ASTM/ANSI classification appropriate to the accuracy of the balance.

On pressing the [Cal] key the display will show the balance setting a new Zero condition by showing “LOAd 0”. Make sure the pan is empty then press the [Setup] key to continue

The display will show the busy symbol and a line of dashes and then after a few seconds will display the default calibration mass. For example, for a “213” model (210g capacity, 1mg readability) the display will be “200 g” where 200 g is the default calibration mass.

Place the selected mass on the balance. The balance will automatically continue. The display will show the busy symbol and a line of dashes and after calibration is complete it will sound a beep and display “unLOAd”. Remove the weight. Another beep will be heard confirming the unloading action. The balance will display the busy symbol and a line of dashes for a few seconds and then sound a beep and return to normal weighing.

6.2.4 Automatic Calibration

The balance has the ability to ask for calibration when the balance has automatic calibration enabled and the conditions of the automatic calibration have been met.

Conditions that will cause an automatic calibration are:

 Internal temperature change greater than a pre-set amount (typically 2ºC for

Precision balances).

 Time since last calibration exceeds a pre-set time (typically 4 hours, or 15 minutes

after power is applied).

The balance will call for calibration to be carried out by flashing the “CAL” symbol on the

display. As soon as the balance is calibrated the symbol will be turned off. The Auto calibration feature can be enabled, disabled or changed within the user options

to meet the requirements of the users.

6.2.5 Calibration Errors

Occasionally during calibration an error will be detected. These errors can be caused by:

 Unstable readings  Improper calibration weights being used

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 Large shifts of zero from the factory settings

When an error is found a displayed message will be shown and the calibration must be done again. If the balance has error messages more than once it is possible the mechanics have been damaged.

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7 DISPLAY

The LCD has several areasA large 7 digit area to display the weight with symbols for common weighing units on its

right and symbols for zero, tare (Net) and stability on the left. Text to show the current operation of function being used.

7.1 SYMBOLS AND TEXT

The LCD has unique symbols to indicate the following:

0

Zero

Busy

Stable

g, mg, kg, ct, dwt, GN, ozt, oz, N, Custom, g/cc, Pcs, %,

Symbols shown for units and modes Battery charge symbol

Indicators:

“CAL”

When calibration is occurring or about to occur

“T”

For a time driven calibration

“ºC”

When a temperature is shown or a temperature driven calibration is to occur

“Net”

When a net weight is shown

“Dynamic”

When the balance is in the dynamic / animal weighing mode

“HOLD”

When the balance is displaying dynamic weighing result

“Parts”

When the balance is in the Parts counting mode

“Percent”

When the balance is in the Percent weighing mode

“Density Solid”

When the balance is in the Solid Density mode

“Density Liquid”

When the balance is in the Liquid Density mode

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8 KEYPAD

(Design may vary slightly)

The keypad has the following keys to operate the balance.

Keys

Primary function

[POWER] To turn the balance to ON or Standby

[0/T]

[0/T] A combined zero and tare function. To escape from setup functions and modes.

[Cal]

[Cal] Starts the calibration function

[Print]

[Print] Instructs the balance to print data

[Mode]

[Mode] Enters the Mode Selection Menu

[Unit]

[Unit] Selects weighing units by cycling through a set of

enabled units.

[Setup]

[Setup] Enters the setup parameters (Supervisor Menus).

Enters a function or saves a value while manually entering unit weight or check weighing limits.

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[Down] To decrement or change a displayed value or scroll

through options backwards

[Right] To advance a flashing digit by one position to the right. To go back by one step during setup functions

[Left] To advance a flashing digit by one position to the left

[Up] To increase or change a displayed value or scroll

through options forward

8.1 NUMERIC ENTRY METHOD

To set a value when required, use the keys as given below-

[Up] and [Down] symbol keys to increase or decrease the flashing digit, [Right] and [Left] symbol keys to advance or move back the digit and [Setup] key to accept the value

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9 INPUT/OUTPUT

The rear panel has the following connectors:

 RS-232 serial - 9 pin d-subminiature plug.  Remote display connector (USB type A socket).  I/O connector (USB type B socket).  Power input socket. (Required power input is a low-voltage external supply, 18VDC

@ 830mA for all models). Accepts concentric barrel plug 11.4mm length X 5.5mm outside diameter X 2.1mm centre diameter.

There is also a battery cover and slot for the rechargeable NiMH battery pack (if available with your model). Due to the high power requirements of the analytical balance weighing mechanism and the internal calibration mechanism, it is not recommended to use battery power for these options.

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10 OPERATIONS

10.1 INITIALISATION

When the balance is first switched on, it will display the balance serial number (if set), software revision, the model capacity and then all segments on the display will be shown. Overall the time taken is usually 5 -10 seconds.

If an operator passcode has been set, the display will show “PC - - - - ”. In this case you must enter the passcode to continue using the numeric entry method (see section 7.1). A different passcode may be set for a Supervisor to weigh or to have access to the selected User menus. If the passcode has not been set the balance will continue as below.

The display will show zero reading along with

the zero symbol “0” and the weighing unit

last used. If automatic time calibration is enabled the balance will calibrate 15 minutes after power up or again after the pre-set time interval.

10.2 PASSCODES

If a passcode has been set to limit access to the weighing functions of the balance the display will show “PC - - - -”. Use the numeric entry method (see section 8.1) to enter the code. The display show the digits entered as they are set. The active digit will have the “-“ flashing. Make sure to enter the correct passcode to continue. See the Section 13.6 for details.

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10.3 WEIGHING

Press [0/T] to zero the balance if required, “0 “ will be displayed Place a mass on the pan and the weight will be displayed If a container is used, press [0/T] to tare the balance when the balance symbol “~” is

on. “Net” will be displayed to indicate that the balance is tared. When the display shows zero, place the item to be weighed. Only the net weight will be

displayed. At any time the [Unit] key may be pressed to select another unit. Use the [Up] or [Down]

keys to scroll through the units and select the desired unit by pressing [Setup], the display will change to show the weight in the selected weighing unit. The available weighing units can be enabled or disabled by the user (see section 13.1). Only weighing units that have been enabled will be cycled through when [Unit] is pressed.

Weighing Units:

Note: Approved units have restricted range of units available. You can select alternative weighing units to display the weight by pressing the [Unit] key.

The available weighing units are:

Unit

Symbol

Models

Conversion Factor 1g =

Conversion Factor 1 unit = grams

GRAMS

All 1 1.0 2 MILLIGRAMS

not 0.01g units

1000

0.001

KILOGRAMS

0.01g & 0.1g units

0.001

1000

CARATS

All 5 0.2000

PENNYWEIGHT

dwt

All

0.643014865

1.555174

GRAINS

All

15.43236

0.0647989

TROY OUNCES

ozt

All

0.032150747

31.103476

OUNCES

All

0.035273962

28.349523

POUNDS

0.01g & 0.1g units

0.00220462

453.59237

CUSTOM

Custom

All

As specified

It is possible to set the balance to display only grams. Grams will always be one of the units enabled, by default.

If “Custom” unit is selected, the balance will prompt for entering a multiplier by displaying “CF 1.2345”, where “1.2345” is the last stored value. Any value ranging from 0.100 to

10.000 may be entered, by which the weight in grams will be multiplied before being displayed. If a multiplier of greater than 1.000 is entered, the number of decimal places displayed will be reduced by one. This multiplier value will be saved for the next use until it is changed by the user.

The balance displays the alternate weighing units with as much precision as possible. For example, the 410g capacity balance (410g x 0.001g) could weigh up to:

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Unit

Maximum

d =

410.000

0.001

410000

0.410000

0.000001

ct.

2050.000

0.005

dwt

263.6360

0.001

6327.260

0.02

ozt

13.18180

0.00005

14.46230

0.00005

0.90389

0.00001

10.4 FUNCTIONS

When weighing, the user can access the applications that have been enabled (see section

13.2). The following applications are available depending on model:

Weighing Parts counting Percent weighing Animal / dynamic weighing Density determination

The selectable functions can be enabled using a similar method to the Units above by turning the functions on or off.

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10.4.1 Parts Counting

This allows the user to weigh a sample of parts to compute an average unit weight and then determine the number of items being weighed by dividing the net weight by the unit weight value. The result is always a whole number of parts.

The balance will have a preset number of parts to be used as a sample. These values are 10, 25, 50 or 100 items.

Steps: Press [Mode] to show parts counting, “Parts” will be displayed Enter parts counting by pressing [Setup] Press the [Up] or [Down] key to select the sample size, “SP XX

PCS

”, XX=10, 25, 50,

100, etc., then press [Setup] to confirm

When “Ld XX

PCS

” is shown, place XX number of items on the pan and press [Setup] to compute the average piece weight. Display will indicate the total weight in the last selected unit and then show “XX Pcs” sounding a beep. A message “Parts” will be prompted on the top of the display to indicate that the balance is in the parts counting mode

Remove the sample and display will show “0

PCS

”.

Place an unknown quantity on the pan. The balance will then compute the number of parts based on the average piece weight. The display will show the result in Pcs

To count another item press [Mode] and continue as before. Checks will be made to determine that the weight of the reference parts is large enough for

reasonably accurate counting (weight of each piece must be > 1d) To return to normal weighing, press [0/T].

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10.4.2 Percent Weighing

Percent weighing will be done by defining a certain weight to be 100%. The weight to be used can either be entered by the user or taken from a sample

Press [Mode] and then the [Up] or [Down] key to select Percent weighing, “

Percent

” will be

displayed Press [Setup] to enter the function Display will show, “SAmPLE %” Press [Setup] to select the sample method or scroll to manually enter the sample weight

as given below When “LOAd 100 %“ is shown, add the sample Press [Setup] to set this weight to be 100%. The display will show “REF WT” and the

sample weight in the last selected unit. After a while “100 %” will be displayed. “

Percent

” will

be shown on the top of the display to indicate that the balance is in the percent weighing mode

Remove the sample and “0.00 %” will be displayed Place an unknown sample on the pan to display the percentage weight. To set another weight as 100%, press [Mode] and continue as before To manually enter a value to be set as 100%, press [Up] or [Down] key when “SAmPLE”

is shown to select “Ent Wt” Press [Setup]. Display will show a value in the unit last used in the weighing mode Enter the weight using the direction keys and numeric entry method. Place unknown sample to display the percentage weight To perform percent weighing with another sample press [Mode] and continue as before. To return to normal weighing, press [0/T]

NOTE: Percentage will be initially displayed to the maximum number of decimal places based on the resolution of the balance. To increase or decrease by one decimal place, press the [Up] or [Down] key respectively.

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10.4.3 Dynamic (Animal) Weighing

The balance can be set to weigh animals or moving items, also known as dynamic weighing. The balance will collect the weight over a period of time to arrive at an average value and display the value until the operator resets the balance. The actual weighing process can begin either automatically when the weight is placed on the pan or when initiated by the operator. The weighing unit can be selected as normal using the [Unit] and [Setup] keys, before entering the dynamic weighing process.

Steps: Press [Mode] and then the [Up] or [Down] key to select Dynamic (Animal Weighing).

When “

Dynamic

” is displayed press [Setup] to enter the dynamic weighing mode

Press [Up] or [Down] to select “rUN” for starting the dynamic weighing using the method previously set, or “SEtuP” to set up the balance for animal weighing (see the section on Dynamic Weighing Setup Parameters)

10.4.3.1 MANUAL MODE

When the balance is in the MANUAL mode – If [Setup] is pressed when “rUN” is selected, balance will display “StArt ” Place the item on the pan and press [Setup] again After the configured Delay and test time are computed by the balance, the result will be

displayed by showing “

Hold

” after a pre-set time Delay and Sampling period (see the

section Dynamic Weighing Setup Parameters)

10.4.3.2 AUTO MODE

When the balance is in the AUTO mode – If [Setup] is pressed when “rUN” is selected, balance will display “LOAd” Place the item on the pan. The animal weighing test will begin automatically After the configured delay and test time are computed by the balance, the result will be

shown displaying “HOLD” (see the section on Dynamic Weighing Setup Parameters) During animal weighing, if the [Print] key is pressed, the balance will display “PAUSEd”

for 1 second then show the current average weight with the “

Dynamic

” indicator flashing. To resume, press [Print] again or Pressing [Mode] will display “StOP” for one second then show the final value. The value

will be locked until the user releases it.

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Remove the item from the pan. Press [Mode] to go back to “rUN” to weigh another item or [0/T] to return to normal

weighing.

10.4.3.3 Animal Weighing Setup Parameters

Press [Mode] and then [Up] or [Down] to select Animal Weighing. When “

Dynamic

” is

displayed press [Setup] to enter the function Press the [Up] or [Down] key to select “SEtuP” Press [Setup] to select “SEtuP” to set up the balance for animal weighing Use the [Up] or [Down] key to scroll through the options for setting up the mode. The

display will show “AUtO” or “mAnUAL”. Select “mAnUAL” or “AUtO” If “AUtO” is selected-

ThresHOLD (For AUTO mode only) The display will next show “TH XX” where XX is the minimum weight of the item required

by the balance to start the process for animal weighing. The value will be shown in the last selected unit.

The value XX can be changed from 1 to 99 grams using the keypad numeric entry method. To confirm the desired value, press [Setup]

10.4.3.4 Test time

After [Setup] is pressed to select “mAnUAL” or “AUtO”, it will display “tImE XX”, where XX is the number of seconds over which the balance will average to compute the final

weight as set during last operation The value XX can be changed to between 10-99 seconds using the keypad numeric entry

method. To confirm the desired value, press [Setup]

Delay

Next, the display will show “dLY XX” where XX is the time in seconds taken by the balance before the sampling starts.

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The value XX can be changed to between 0-99 seconds using the keypad numeric entry method.

To confirm the desired value, press [Setup]

10.4.4 Density Determination

It is possible to determine the density of solids or liquids using this mode. The user selects the type of density to be determined and then enters values to be used by the balance.

The density mode allows the user to use a special Density Kit or use the below pan weighing facility to perform the necessary weighing.

10.4.4.1 Density of Solids

To perform the density of solids test, the user must have a method to immerse the sample in the chosen liquid. The density of the liquid must be known or determined from a look-up table.

For water and ethanol the density will be calculated based on the temperatures entered using the keypad numeric entry method.

Steps: Press [Mode] and then [Up] and [Down] keys to select “

Density Solid

” or “

Density Liquid

” Press [Setup] to enter Density mode. If “Density Solid” was selected, the type of liquid used for the test must be selected. Press [Up] or [Down] to select the liquid – water (display “wAtEr”), ethanol (“EtHAnOL”),

or other (“OtHEr”). For the “Other” choice the density will be asked for. Enter the density (g/cc) using the

numeric entry method (see section 7.1). The display will show “ XX.XXX g/cc” Press [Setup] to continue. The balance will request the weight of the sample in air by displaying “Air wt”. Place the

item on the pan, or in receptacle if the density kit is used, and press [Setup]. The weight will be shown in the last weighing unit selected.

After completion of the air weighing, the balance will request the weight in liquid by displaying “LIq wt”. Submerge the item in the liquid and press [Setup] to start the liquid weighing. After completion of the liquid weighing, the balance will compute the density of the sample and display it as “XXXX g/cc”.

Remove the item from the pan and press [Mode] to continue with a new sample or press [0/T] to return to normal weighing.

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10.4.4.2 DENSITY OF A LIQUID

When finding the density of a liquid, it is necessary to weigh a sample of known volume in air and then in the liquid. The volume of the sample must be entered by the user. The last known volume is stored for use at any time.

If using the density determination kit, the volume of the plumb is marked on its support, i.e.

10.123. Steps: Press [Mode] and then [Up] and [Down] to select “

Density Liquid

”. Press [Setup] to select the Liquid Density mode Use [Up] and [Down] to scroll through the solid or liquid method The volume will be asked for. Enter the volume using the keypad numeric entry method, or

continue using the last volume entered. The display will show “V XX.XXX” Press [Setup] to continue The balance will request the weight in air by displaying “Air Wt”. Place the glass plumb

supplied with the density determination kit in air on the weighing pan and press [Setup] to start the air weighing. The value will be shown in the last weighing unit selected.

After completion of the air weighing, the balance will request the weight in liquid by displaying “LIQ Wt”. Submerge the glass plumb in the liquid and press [Setup] to start the liquid weighing. The weight will be shown in the last selected unit. After completion of the liquid weighing, the balance will compute the density of the liquid and display it as “ XXXX g/cc”

Remove the item from the pan Press [Mode] to continue with a new sample or press [0/T] to return to normal

weighing. Pressing [Print] will print the density value in g/cc.

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11 RS-232 INTERFACE

The balances have the ability to send or receive data over the serial interfaces, RS232 and USB. Both interfaces are controlled by the following parameters. An additional interface is available to operate with the Remote Display unit.

The USB and RS232 are general purpose serial ports so that the weighing data can be sent over the interface either automatically or when the user presses the [Print] key.

11.1 HARDWARE

The RS-232 interface is a simple 3 wire connection. The input and output connections are: Connector: 9 pin D-sub miniature socket

Pin 2 input to balance RXD Pin 3 output from balance TXD Pin 5 Signal ground GND

Handshaking is not applied. Baud rate: 4800, 9600, 19200, 38400 Parity: NONE (=8N1), EVEN (=7E1) or ODD (=7 O 1) All lines are terminated with carriage return and line feed (<CR><LF>). In continuous output mode, or if single-line output on demand is selected, the serial output

format will be a single line in the form “1234.567 g<CR><LF>”. The format of the single-line output will change depending on the mode in which the

balance is operating, as described below. If output on demand is selected, the user may optionally configure the serial output as a

choice of 3 styles of form, either in a default format or in one of two custom formats. Each of the custom formats can be configured to output up to 15 lines of data. The data types that can be printed are:

NAME

TEXT PRINTED

ID number

ID no.: xxxxxxxxxxxx

Serial number

Serial no. xxxxxxxxxxxx

Date

DATE dd/mm/yyyy

Time

TIME hh:mm:ss

Net weight

Net: xxx.xxx g

Gross weight

Gross: xxx.xxx g

Tare weight

Tare: xxx.xxx g

Unit weight

Unit wt: xxx.xxx g

Count

Count: xxxx pcs

Reference weight

Ref. wt: xxx.xxx g

Percent

Percent: xx.xxx %

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Checkweigh lower limit

Low: xxx.xxx g

Checkweigh upper limit

High: xxx.xxx g

A blank line printed

<CR><LF> only.

Any of these can be printed on any of the 15 lines available. Not all items need to be used and any one can be used more than once (see section 13.3).

The data for each form will be preceded by a start-of-header <SOH> character (01) and terminated with an end-of-transmission <EOT> character (04). These characters will be ignored by a serial printer but will allow a computer program which reads the data to distinguish between this block report format and the single-line output format described above.

11.2 STANDARD FORMAT

The balance will print the following data as the standard form. The standard form cannot be changed. The format of the custom forms #1 and #2 will be the same as the standard form until modified by the user.

Line 1

Date

Line 2

Time

Line 3

Blank line

Line 4

ID number

Line 5

Blank line

Line 6

Result

Line 7

Blank line

Line 8

Blank line

This will result in a printout that looks like:

*NOTE: The format of the results line will change depending on the mode in which the balance is operating, e.g. Normal weighing, Check weighing, Animal weighing: “123.456 g” Parts counting: “1234 pcs” Percent weighing: “12.345 %”

11.3 INPUT COMMANDS USING REMOTE KEYS

The balance can be controlled with the following commands sent using remote keys such

as from a PC. The commands must be sent in upper case letters, i.e. “KT” not “kt”. Press

Date: 23/09/04 Time: 15:45:27

ID No: 123456

Net: 123.456 g

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the Enter key of the PC after each command (the action of Carriage Return is denoted as <CR> as shown below).

Basic Input Commands:

!KT<CR>

Tares the balance to display the net weight. This is the same as pressing the [Zero / Tare] key when the balance is in the normal weighing mode.

!KS<CR>

Enters the setup section. This is the same as pressing the [Setup] key when the balance is in the normal weighing mode.

Once entered the setup section, the balance can be controlled remotely using the Input Commands (as mentioned in this table) which will perform the same key functions as described in section 13.0.

!KP<CR>

Transmits data over RS-232 interface. This is the same as pressing the [Print] key when the balance is in the normal weighing mode.

!KM<CR>

Enters the Modes section. This is the same as pressing the [Mode] key when the balance is in the normal weighing mode.

!KC<CR>

Enters the Calibration section. This is the same as pressing the [Cal] key when the balance is in the normal weighing mode.

!KU<CR>

Enters the Unit selection section. This is the same as pressing the [Unit] key when the balance is in the normal weighing mode.

11.3.1 Invalid Input Command:

If an invalid command is received, then the command is returned as follows-

Invalid Command

Message returned

Remarks

!NT<CR>

!EU<CR>

Command character is not ‘K’

!KK<CR>

!EK<CR>

Key character is not ‘T’, ‘S’, ‘P’, ‘M’, ‘C’ or ‘U’

!KT-<CR>

!EF<CR>

Command format error, <CR> is not the fourth character

KT<CR> or !KT -

No reply

Either ‘!’ or <CR> is missing in the command string

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When the remote display output is used with the Remote Display unit, the output is a continuous stream of data representing the weight and other information to display the correct data on the remote display.

If the remote display data stream format is required for development purposes then please contact the manufacturer for advice.

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12 ERROR CHECKING

During weighing the balance is constantly checking to see if it is operating within the limited parameters. The errors likely to occur are:

A/D counts below lowest allowed value A/D counts above highest allowed value A/D not operating Maximum capacity exceeded

Other errors may be detected during special functions or operations. These will be described in the section that applies.

Error messages and the reasons are:

Concerning A/D counts

Err UL

A/D counts below a limit

Err OL

A/D counts above a pre-set limit

Concerning calibration

Err Stb

Calibration could not be completed because the results were not stable

Err LO or Err HI

Calibration constant not within 20% of old calibration constant

Concerning weighing

Err LO

Weight display is below zero by >4%max

Err HI

Weight is above maximum plus 90d

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13 SUPERVISOR MENUS

Pressing the [Setup] key while in normal weighing gives access to the menus. When [Setup] is pressed and the Supervisor Passcode is not enabled the display will

show the Supervisor menus. If passcode is enabled, the balance will ask for it by

displaying “PC - - - - ” If a wrong code is entered an “Err PC” message will flash and the balance will return to

weighing mode If the passcode has been enabled and entered, the balance will allow the operator to

access the Supervisor’s menus by which the user can enable/disable weighing units or modes, set balance parameters for the conditions, set time and date, set parameters for the RS-232 interface, calibration parameters and security parameters

The display will show the first menu item “UnitS”. The [Up] and [Down] keys will cycle through the main menu items, pressing the [Setup] key will enter the sub-menu or options can be set. Press [Mode] to come out of a sub-menu or [0/T] to return to normal weighing

13.1 ENABLE WEIGHING UNITS

When “UnitS” is displayed, press [Setup]. The display will show the symbol for the first

unit, e.g. carats, ct, together with its enable state “OFF” or “On”. The user can then enable

or disable the carats unit by using [Up] or [Down]. Pressing [Setup] will confirm the setting and will advance to the next weighing unit. Repeat for each weighing unit in turn. Gram is always enabled

Press [Mode] to advance to setting of the next menu or press [0/T] to return to normal weighing

13.2 ENABLE WEIGHING MODES

The same steps are followed to enable or disable the weighing modes: Press [Setup] when “MOdES” is displayed. The display will show the first mode i.e., Parts

Counting (“Parts”) together with its enabled state “OFF” or “On”. The user can enable or disable the parts counting mode by using [Up] or [Down]. Pressing [Setup] will confirm the setting and will advance to the next weighing mode. Repeat for each mode in turn

Press [Mode] to advance to setting of the next menu, or press [0/T] to return to normal weighing

13.3 ENABLE SERIAL INTERFACE PARAMETERS

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The parameters affecting the serial SEtuP are set in a similar manner to the other parameters.

Press [Setup] when “SEriAL” is displayed to enter the sub-menu. The parameters that can be set are:

EnAbLE

The serial port can be set to On or OFF

bAUd

Set the Baud Rate to 4800, 9600, 19200 or 38400, the default rate being 4800

PAritY

Set the Parity to nOnE, EVEn or Odd

StAbLE

To print when stable (On) or regardless of stability (OFF)

COntin

Set the RS-232 to send data continuously to On or OFF

PEriOd

Set the RS-232 to send data periodically (set in seconds) to On or OFF. If On is selected, the value can be changed between 1 and 999 seconds, using [Up] and [Down]

FOrmAt

To send data as a single line of data, using the standard format or using a customer designed format (FORM 1 or FORM 2).

REMOTE

To enable the remote display. Select ON for the remote display operation, or OFF to disable the remote display. ON is default.

13.4 FORMAT OF CUSTOM FORMS #1 and #2

If FOrm1 or FOrm2 is selected, it can be changed by the user using a selection of available data. By default the 2 forms are the same as the standard form unless changed by the user as below.

When FOrm 1 or FOrm 2 is selected the user can set the information to be printed on each line of the form. Pressing the [Up] or [Down] keys will cycle through the options available. The options are:

INStid

Instrument ID number

Ser no

Serial Number

tImE

Time

dAtE

Date

nEt

Net Weight (Gross weight – Tare Weight)

grOSS

Gross Weight

tArE

Tare Weight

Unit

Unit weight in parts counting mode

COUNT

Number of items in parts counting mode

REF

100% weight in percent weighing mode

PER[

Percentage of reference weight in percent weighing

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LO LIM

Low Limit when check weighing

HI LIM

High Limit when check weighing

[r Lf

Inserts a blank line

END

Signifies the end of the report When END is entered the display returns to the RS-232 Sub-menu

Enter the data to be printed on the first line by pressing the [Up] or [Down] key to cycle through the options. If the current information is OK then press the [Setup]/Enter key to move to the next line.

e.g. “LInE 1”, “DATE” - prints date Select a code for one of the pre-set data formats as detailed above. The next line shows: “LINE 2” “TIME” - prints time

Only one item can be entered per line. Continue until the formatting of the form is complete. There are 15 lines of possible data.

After the 15th line has been set or “END” has been selected, the balance will return to the RS-232 Sub-menu.

Press [Mode] to advance to setting of the next menu or press [0/T] to return to normal weighing.

Remote Display Option To enable the Remote Display unit, the REMOTE parameters should be set to REMOTE ON.

The REMOTE OFF will disable the remote display. Details of the baud rate, parity, format of the data output when REMOTE ON is selected

will be determined at a later date. Data will be a string of characters that control the symbols on the display followed by the

weight (or other main reading from the balance such as count or density) and weighing unit is ASCII characters.

For example ABCD ±123.4567_dwt<cr><lf> Where the characters ABCD will control which symbols are on/off on the remote display. How many characters and what the details are will be determined as we go.

13.5 SETUP PARAMETERS

The user parameters that control the balance are shown under the setup menu. When “SEtuP” is displayed, press the [Setup] key. The options for each parameter can be scrolled through by using the [Up] or [Down] key.

TIME 12:23:34

Set Time using the keypad numeric entry method. DATE

Set Date using the keypad numeric entry method.

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FORM EUROPE 01:03:14(dd/mm/yy) USA 03:01:14(mm/dd/yy)

INST ID 123456

Enter a user number to identify this balance

BUZZER Bu on Bu Off

On= Enable OFF= Disable

BACKLT Bl 2

Set level from 0 to 5. 0=Off, 5 = on maximum brightness. Always on unless balance is not used for 5(?) minutes, then turns off automatically until key is pressed or weight >20d is detected. Default brightness is 2

POWER Pw off Pw on Pwon 5

Set the time after which the unit will go into Stand-by power settings, On=Enable, OFF=Disable, If set to On- the options are 1 to 9 minutes

FILTER Fl 5

Set a value for the amount of filtering to be done ranging from 1 to 10. A larger number means more filtering and a slower response.

STABILE stab 5

Set a value to be used to determine balance stability, set a value of 1, 2, 5 or 10d. A larger number corresponds to a larger stable zone. Default is 5

AUTO ZERO Az 1

Can be set to On or OFF to enable the auto-zero function. If set to On- select from 1, 2 or 5d

Dec pt Dp pnt

Set decimal point on the display to be a point or a comma. Also on the serial interface. Show text and set decimal points on the LCD to show the selection.

The sub-menu is entered by pressing [Setup] – Use the [Up] and [Down] keys to increase or decrease the value for setting. Press

[Setup] to accept the setting and advance to the next item in the menu Press [Mode] to advance to setting of the next parameter or [0/T] to return to normal

weighing

13.6 CALIBRATION SETUP

This menu allows the user to set the calibration parameters. Press [Setup] when “CAL SET” is displayed to select the calibration parameters The options for each parameter can be scrolled through by using the [Up] or [Down] key

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ENABLE En on En off

NO =operator calibration is disabled YES=operator calibration is enabled

CAL REPORT Cr on Cr off

On = Enabled. Prints out Calibration report after successful calibration OFF = Disabled

TIME CAL Tic on Tic 4 Tic off

On = Enabled. Select time from 1 to 24 hours. Default setting is 4 hours OFF = Disabled

TEMP CAL Tpc on Tpc 1.5 Tpc off

On = Enabled. If set to On, set the temperature variation from 0.2 to 4°C OFF = Disabled

Press [Mode] to advance to setting of the next menu which is “PASSC” or [0/T] to return to normal weighing.

13.7 PASSCODES

To enable the security features in this balance it is necessary to set passcodes. There are 2 passcodes called Operator Passcode and Supervisor Passcode. The Operator Passcode allows an authorised user to operate the basic weighing functions of the balance but will not allow access to the Supervisor Menus if the Supervisor Passcode has been set.

To change or disable a Passcode it will be necessary to enter the current passcode. Press [Setup] when “PASSC” is displayed to enter this section.

PC OPER

------

Enter the current passcode (OLD) first then enter a new passcode if desired. A passcode set to zero will disable the security feature and allow unlimited access.

Pc SUPE

------

First enter the current passcode (OLD) and then enter a new passcode if desired. A passcode set to zero will disable the security feature and allow unlimited access.

Forgotten Passcodes Keep a record of the passcode to ensure you can access this section again. If however

you have forgotten your passcode you can still gain access by entering a universal code.

If you have forgotten the current passcode a code of “15” will always allow you to enter the

Supervisor area. Using the Supervisor menus go to PASSCODE section. Reset the operator or Supervisor

passcode using the “15” code as the old number when asked.

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14 PERIPHERALS

The peripherals that can be used with the balance are the following:

14.1 DENSITY DETERMINATION KIT

(For 0.0001 g units only) The Density Determination Kit includes everything needed to carry out precise and

repeatable measurement. The kit allows a sample to be weighed in air and then a liquid to determine the density of the sample. It also allows a glass sinker of known volume to be weighed in air or in a liquid, to determine the density of the liquid.

14.2 ANTI-VIBRATION TABLE

The anti-vibration table is a support for laboratory balances that isolate the balance from vibration through the floor. The table has a granite surface for the balance with a separate table top surrounding the balance.

14.3 THERMAL PRINTER

A compact thermal printer is available which is ideal for use with laboratory balances.

14.4 REMOTE DISPLAY

A remote display can be connected for users that require this feature.

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15 SAFETY AND MAINTENANCE

CAUTION

Use the AC adapter designed by the manufacturer for the balance. Other adapters may cause damage to the balance.

Avoid subjecting the balance to rough treatment or shocks during transport, setting up and operation. Do not overload the balance beyond its maximum capacity, and do not drop material onto the platform which could damage the balance.

Do not spill liquids on the balance as it is not water-resistant. Liquids may damage the case and if it gets inside the balance it may cause damage to the electronics. Use of our special transparent in-use protective covers is recommended.

Material that has a static electric charge could influence the weighing. Discharge the static electricity of the samples, if possible. Another solution to the problem is to wipe both sides of the pan and the top of the case with an anti-static agent.

16 TROUBLE-SHOOTING

Service of a balance will generally be necessary when it does not perform as expected. The balances are not user-serviceable. For Service Information, see section 18.0 and contact your supplier for support.

Problems usually fall into one of the following categories: User Problems:

The user is asking the balance for something it cannot do or is confused by the modes and functions of a balance. It is also possible the user has set a parameter that has affected the balance operation. Resetting the parameter to a normal value will restore operation.

 Mechanical Problems

The balances consist of complicated and fragile mechanical devices. They can be damaged by placing a weight on it which is too high for the balance or by dropping the balance or occasionally shipping it without taking care. The most fragile parts are the flexures. Dust, dirt, spills and other foreign objects in the balance can also cause problems.

 Electronic Problems:

These are the rarest of the problems affecting balances. If an electronic problem is suspected make sure the mechanical problems that can cause similar symptoms have been eliminated before attempting electronic repairs. With the exception of cables most electronic repairs are solved by board replacement.

The trouble-shooting table in section 16.1 is a guide of common problems and their solutions. Note that many problems may have multiple solutions and there may be problems found that are not listed in the table. For service information, please contact your supplier.

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16.1 TROUBLE-SHOOTING GUIDE.

BALANCE DOES NOT FUNCTION

Problems

Possible causes

Suggestions

The balance is dead when power is applied

Power supply failure

Check adapter is working Check adapter is correct for the balance Normal adapter is 18VDC, 830mA. *Power supply circuit board failure *Short circuit on any circuit board

The display does not turn on but the calibration motor moves when power is applied

Power is getting to balance, display is not working

*Display cables may be faulty *Display module failure

The display stays on the initial test screen when power is applied. Calibration weight motor is on.

Unstable balance Balance not working correct Power supply

*Check if balance is stable by using service menu and view A/D values Put draught shield over pan Check power supplies

BALANCE WORKS BUT IS NOT STABLE

Balance is unstable by a few divisions

Noise or vibration from environment Friction in mechanics

Check the balance is positioned correctly to avoid vibration, wind or air movement, it is on a solid table, It is not near sources of heat or cool air, Check balance with weights if problem occurs when sample is used. Static electricity on the samples can cause drifting and instability. Check the area around the weighing pan for hair, dust, obstructions under the pan, *A complete inspection of the mechanics to look for sources of friction may be needed.

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Balance is very unstable and does not weigh correctly

Mechanical problems

Balance programming

Electronic problems

*A complete inspection of the mechanics to look for sources of friction. *Verify the A/D is also unstable. If the A/D is OK then suspect the programming of the balance. Reset parameters, check linearity and redo the calibration. Some electronic problems can also cause this. But all mechanical problems must be resolved first.

BALANCE IS NOT ACCURATE

You must have accurate and trusted weights to test a balance. If you suspect that the balance is not accurate then you must know your weights are accurate. A balance calibrated using a bag of flour is not accurate even if it works OK otherwise.

Balance is not accurate

Repeatability Eccentric loading

Linearity

Verify the balance shows the same value when the same mass is placed on the centre of the pan for a few tests. Verify the balance shows the same reading (within a tolerance depending upon the model) when a mass is placed at positions around the pan. Verify the balance is acceptable throughout the weighing range. The balance must give acceptable readings from low weights up to the capacity.

Poor Repeatability

Usually a mechanical problem.

Inspect the area around the pan for hair, dust or other obstructions, *Inspection of the mechanics may be needed for any possible problems.

Poor Eccentric Loading

A mechanical problem

Inspect the area around the pan for hair, dust or other obstructions, *Inspection of the mechanics may be needed for any possible problems. *Readjusting of the Eccentric Loading is recommended.

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Poor Linearity

Usually a mechanical problem

Electronic Problems

Re-check repeatability *Inspection of the flexures for damage or loose hardware may be required *Use the Linearity Function in the service menu to reset linearity *A problem in the analogue circuit board or power supplies can cause poor linearity. Make sure all mechanical problems have been eliminated first

Symmetry 124, 213, 413, 2202, 214 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual