Excell Precision WEIGHING SCALES User Manual

EXCELL PRECISION CO., LTD.

DIGITAL HIGH PRECISION

WEIGHING SCALES

USER INSTRUCTIONS

The information contained herein is the property of Excell Precision Limited and is

supplied without liability for errors or omissions. No part may be reproduced or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.

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TABLE OF CONTENTS

BEFORE USING THE SCALE.....................................................................................................3

PREPARING TO USE THE SCALE.............................................................................................3

INTRODUCTION..........................................................................................................................4

1. FEATURES...........................................................................................................................4

2. SPECIFICATIONS................................................................................................................5

3. POWER CONSUMPTION.....................................................................................................5

4. LOW BATTERY WARNING...................................................................................................5

LCD DISPLAY SYMBOLS...........................................................................................................6

KEYBOARD FUNCTION.............................................................................................................7

OPERATION................................................................................................................................8

1. DISPLAY BACKLIGHT..........................................................................................................8

2. ZERO....................................................................................................................................8

3. WEIGHING MODE................................................................................................................8

(1). Units Selection................................................................................................................8

(2). Totalising.........................................................................................................................8

I. Weight Totalising........................................................................................................9

II. Recall Totalised Weight Values...................................................................................9

III. Clear Totalised Weight Values....................................................................................9

(3). Deduction of the Container Weight...............................................................................10

I. The weight of the container is unknown ( Tare ).......................................................10

II. Recall the semi-auto tare value................................................................................10

III. Clear the semi-auto tare...........................................................................................10

IV. The weight of the container is known (Pre-set tare).................................................11

V. Recall the pre-set tare value.....................................................................................11

VI. Clear the pre-set tare value......................................................................................11

(4). Check Weighing............................................................................................................12

I. Pre-set the “Low limit value”, “High limit value”, and “the buzzer” operation.............12

II. Pre-set the Low limit value only................................................................................13

III. High/OK/Low indications..........................................................................................13

IV. Recall the check weighing setting............................................................................13

V. Clear the check weighing settings............................................................................13

4. COUNTING FUNCTION.....................................................................................................14

(1). Sampling.......................................................................................................................14

(2). Totalising.......................................................................................................................14

(3). Check Weighing............................................................................................................14

CONFIGURATION SETTINGS..................................................................................................15

1. CHECK-WEIGHING CONFIGURATION.............................................................................16

2. RS-232 SETTING...............................................................................................................17

3. EXIT CONFIGURATION SETTINGS...................................................................................18

RS-232 AND RELAY OUTPUT..................................................................................................19

1. RS-232 OR SERIAL PRINTER OUTPUT............................................................................19

(1) RS-232 (25 Pin ‘D’ type) Pin Description.......................................................................19

(2) RS-232 Interface Format...............................................................................................19

(3) Data Format...................................................................................................................20

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2. RELAY OUTPUT.................................................................................................................23

(1) Relay Output..................................................................................................................23

(2) Relay Pin Description....................................................................................................23

(3) Connection Illustration...................................................................................................23

(4) Power Source Illustration...............................................................................................24

(5) Connection Setting........................................................................................................24

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BEFORE USING THE SCALE

To enable you to use this scale correctly, we suggest that you read this manual carefully.

1. Do not use scale in areas with excessive water and don’t spray the scale or indicator with water when cleaning. Remove all water from the scale and indicator with a clean dry cloth.

2. The load placed on the platform must not exceed the maximum weighing capacity of the scale.

3. Keep the scale away from high temperatures and damp conditions.

4. If the scale is not going to be used for some time, please clean it and store it in a plastic bag in dry conditions. A desiccant sachet may be included to prevent moisture build up.

5. If the scale is not going to be used for some time, the internal rechargeable battery should be recharged every three months.

6. Before using the scale after a long period of storage, please ensure that the internal battery is fully charged. NOTE: Care should be taken not to leave the internal battery on charge for too long, as this may decrease the life of battery.

PREPARING TO USE THE SCALE

1. Locate the scale on a firm level surface free from vibrations for accurate weight readings.

2. Adjust the four levelling feet to set the scale platform level using the spirit level bubble located on the scale platform frame.

3. Avoid operating the scale in direct sunlight or drafts of any kind.

4. Remove any weight that might be on the scale platform before the scale is switched on.

5. Once the scale has been switched on, it will go through a LCD display test and then re-zero to be ready for use.

6. The scale requires 15~20 minutes warm up before operation to ensure best accuracy.

7. Please note when the symbol is shown on the display, the internal battery needs to be recharged.

8. All goods weighed should be placed in the centre of the platform for accurate weighing.

The footprint of the goods being weighed should not overhang the edges of the platform.

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INTRODUCTION

1. FEATURES

1. Dual-weighing units: Kilogram (kg) and pound (lb).

2. Multi-function operation: Full range tare; Pre-tare; Hold function; Net / Gross weight

display; Simple counting; Preset weight value and quantity value; Adjustable noise filter setting from 01 ~ 15 (³15,000 division configuration only); Check-weighing configuration.

3. User-friendly design:

¨ Auto calibration ¨ AC / DC power supply ¨ Large LCD display with built-in backlight ¨ Auto power-off design to ensure the performance stability ¨ Double over-load protection

4. Variable calibration settings depending on the different calibration division:

¨ Standard division (under 10,000 internal resolution): Capacity and weight calibrations

are available for accurate weighing.

¨ High precision division (over 10,000 to 150,000 internal resolution): Linearity, capacity,

and weight calibrations are available for accurate weighing.

5. Options

¨ RS-232 interface ¨ Relay output

6. High performance in A/D converter (weighing indicators)

¨ Input sensitivity: 0.3 µ V/D ¨ Sample speed up to 16 times / second ¨ Non-linearity: 0.01 % of full scale ¨ Input zero range: -1 mv ~ +5 mv ¨ Input signal range: –1 mv ~ +14 mv ¨ Load cell excitation: 5V DC ± 5% 100mA ¨ Load cell drive capacity: up to 4 350 Ω load cells

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10°C ~ 40°C (14°F ~ 104°F)

2. SPECIFICATIONS

The available capacities for selection are different and depend on various models:

Capacity Division

3 kg (6 lb) 0.2 g (0.0005 lb)

6 kg (12 lb) 0.2 g (0.0005 lb)

7.5 kg (15 lb) 0.5 g (0.001 lb) 15 kg (30 lb) 1 g (0.002 lb) 30 kg (60 lb) 2 g (0.005 lb) 75 kg (60 lb) 5 g (0.01 lb)

150 kg (150 lb) 10 g (0.02 lb) 300 kg (600 lb) 20 g (0.05 lb)

600 kg (1200 lb) 50 g (0.1 lb)

Operating Temperature: 0°C ~ 40°C (32°F ~ 104°F) OIML: - Power Source: AC 110V/220V (±10%) + DC 6V/4.5AH Rechargeable Battery Display: LCD, 6 digits, 25 mm (Height), EL backlight

3. POWER CONSUMPTION

1. The power consumption is around DC 20 mA (system + load cell), the rechargeable battery

can be used up to 200 hours.

2. The power consumption is around DC 67 mA (system + load cell + backlight), the

rechargeable battery can be used for 60 hours approximately.

3. The power consumption is around DC 71 mA (system + load cell + backlight + RS-232), the

rechargeable battery can only be used for 56 hours approximately.

4. LOW BATTERY WARNING

Please note when the symbol is shown on the display, the internal battery needs to be

recharged.

v The scale will power off automatically without recharging after the low battery symbol

shows upon for 20 to 30 hours (3 to 5 hours if the backlight is active) on the display. As a

recommendation, the scale must be fully recharged before operating the scale again.

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LCD DISPLAY SYMBOLS

HIGH : Preset High Limit Weight Value

OK : The range between Low & High Limit Weight Value

LOW : Preset Low Limit Weight Value

kg : “kg” unit

3

lb : “lb” unit

Pcs : “COUNTING” mode indicating the number of pieces

à0ß : “ZERO” indication and platform stable confirmation

Net : “Net Weight ”indication

: “Low Battery” indication

61 : (STABLE) “Stable” indication

62 : ( PT) “Pre-set Tare” mode 63 : (M+) “Accumulation” mode

.

. .

64 : ( ) “Sample Too Small” indication 65 : ( ) “Piece Weight Too Small” indication

. . .

. . . .

Pcs

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/

¿

→0←

¿

KEYBOARD FUNCTION

UNITS

1. : Units Key to choose the desired unit weight (kg or lb).

2. : Preset High & Low Limit value.

^ /

3. : Ù Þ Data Entry Key, Þ Backlight Key.

4. : Þ Print Key to print the total data ; ¿ Þ Confirmation Key.

5.

Pcs

6. : Accumulation Key to add the displayed value into memory.

:

Sample Key to set the sample quantity.

7. : Re-call accumulated or preset high & low limit values or preset tare value.

8. : Clear Key to delete the existing accumulated values.

9. : Press this key to enter the counting mode.

10. : Preset Tare Key.

R

CE

.

. .

. . .

. . . .

PT

11. : Zero Key to re-zero the scale.

12. : Tare Key to deduct the container weight.

T

KEYBOARD SYMBOLS:

COUNT SMPL UNITS

PRE-TATR

M+ PST

.

. .

. . .

. . . .

M+

PT

Pcs

UNITS

Þ

ZERO RE-CALL

Ù

→0←

R

Ù

BL

TARE CE

PRINT

¿

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→0←

UNITS

OPERATION

1. DISPLAY BACKLIGHT

Press the key to choose the desired display backlight mode:

. Þ “Auto Backlight” mode. When the weight is over 10 divisions or any

. Þ Display backlight is on all the time.

^ /

key is pressed, the display backlight will be switched on. When the weight returns to zero or the weight on platform is less than 10

divisions, the display backlight will switch off after 5 seconds.

. Þ Display backlight is off.

2. ZERO

Press the key to re-zero the display with no load on the weigh pan. When zero is set,

the (à0ß) symbol will be displayed.

3. WEIGHING MODE

(1). Units Selection

1. Press the key in the weighing mode to choose the desired weighing unit and the

display will show the “kg” or “lb” symbol on the top right of the LCD display.

2. The unit status will be memorized when turning the machine off.

(2). Totalising

1. The scale allows the next totalising operation, even when the weight value does not return

back to zero. The

than 10 d. The scale will store the totalised weight value after the weight is stable.

2. The scale can totalise positive or negative weight but not both at the same time. The

totalised weight store must be reset to zero before it is possible to select positive or

negative totalising mode.

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key is functional, when the weight value changes by more

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I. Weight Totalising

ACTION

DISPLAY

Place the object onto the scale. The display shows the weight value

Press the M+ key

.

STABLE

.

STABLE

kg

The display shows the total number of additions

The total weight totalised shows and the 3

rd

“6”

kg

.

flashes on the display

STABLE

M+

v The totalising function can be used up to a maximum of 9999 times before it must be reset.

The totalising display is limited to 6 digits maximum.

II. Recall Totalised Weight Values

1. Press the key to display the total number of additions and the totalised weight

value. The 3

R

rd

“6” symbol located above (M+) icon will flash on the display. The scale will

return to the weighing mode after 3 seconds.

v The scale will not display the negative sign “-” for negative totalised weight values when

recalling an a totalised weight value, but the negative sign “-“ will be printed out (transmitted

serially) for each negative weight and negative totalised weight.

III. Clear Totalised Weight Values

1. Press the key followed by pressing the key to clear the totalised weight

R

values.

2. All totals will be lost in the following three circumstances:

¨ The mode is changed from weighing to counting or vice versa.

¨ The scale is switched off.

¨ The weight unit is changed.

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Place the container onto the

weight is

(Net) symbol is

T

(3). Deduction of the Container Weight

I. The weight of the container is unknown ( Tare )

ACTION

scale

Press the

The weight value becomes zero and the displayed

Place the object into the container and the display shows the net weight value of the object.

T

key when the

stable.

.

STABLE

Net

.

STABLE

Net

.

STABLE

II. Recall the semi-auto tare value

DISPLAY

kg

R

Press the key followed by pressing the key Þ The display shows

T

the tare weight value.

III. Clear the semi-auto tare

When the container is removed from the scale, the display shows the container weight

value with a negative sign. Press the key to reset the scale to zero, and the (Net)

symbol will switch off.

NOTE:

v Multiple tare operation Þ Users can continuously increase or decrease the tare value by

pressing the key.

T

v The total tare value (tare value + pre-set tare value) can equal the full capacity of the scale.

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weight value of the container

CE

IV. The weight of the container is known (Pre-set tare)

Press the key

Use the Ù key to enter the

followed by pressing the ¿

key

Place the object with the container onto the weight pan.

The display shows the net value of the object

ACTION

PT

.

STABLE

Net

STABLE

Net

.

STABLE

DISPLAY

.

PT

V. Recall the pre-set tare value

kg

DESCRIPTION

The display shows the weight value of the container with the negative sign and the (Net) symbol. The

second “6” above the (PT) icon

indicates the tare is active

kg

R

Press the key followed by pressing the key Þ The display shows the

PT

pre-set tare value.

VI. Clear the pre-set tare value

PT

Press the key followed by pressing the key, then press the

R

key to clear the pre-set tare value. The scale resets back to zero, and the (Net) symbol

and the second “6” icon (PT) will switch off.

NOTE:

v In Tare mode, the Preset tare function is disabled. v The scales with two weighing ranges can NOT pre-set the tare value larger than the first

weighing range. For example: a 30kg scale is set by two weighing ranges. The first range is

0 to 15kg, and the second range is 15 to 30kg. The pre-set tare value can not be larger

than 15kg.

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weighing mode.

A

0

ve of the stability

weight

weight of the object is lower or

UNITS

/

¿

(4). Check Weighing

Press the key to enter the check weighing function. Press the key to

return back to the weighing mode.

I. Pre-set the “Low limit value”, “High limit value”, and “the buzzer” operation

Press the key to enter the value required and step to the next digit by

^ /

pressing the key.

ACTION

DISPLAY

DESCRIPTION

Press the the check weighing function

Set the “Low limit value”

Press the Ù key to enter the Low limit value. Press the ¿

key to confirm the setting

Set the “High limit value”

Press the Ù key to enter the High limit value. Press the ¿

key to confirm the setting

Set the “buzzer” operation

Press the Ù key to set the buzzer operation. Press the ¿

key to confirm the setting

The scale returns to the

︿ key = Upward key (0~9 digit entry)

key to select

.

STABLE

.

STABLE

.

STABLE

.

STABLE

.

STABLE

kg

Buzzer Setting

C C A B

Þ

= When the weight is stable the buzzer sounds and the High, OK or Low icon is displayed.

1 =. The High, OK or Low icon is displayed irrespecti of the weight. The buzzer sounds only when the weight is stable.

2 = The buzzer sounds and the High, OK or Low icon is displayed irrespective of the stability of the

.

B Þ

0 = The buzzer does not sound.

1 = The buzzer sounds at the OK

status.

¿ key = Confirmation key

2 = The buzzer sounds when the

(move the cursor one step to the right)

equal to the lower limit value, or

higher than the upper limit value.

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II. Pre-set the Low limit value only

After completing the Low limit value setting, the display shows . . Press the

key to complete the setting, and the display shows

STABLE

kg

v When users only pre-set the Low limit value, the buzzer setting is fixed at:

III. High/OK/Low indications

LOW OK HIGH

½ппппппп½пппппррррр½рррррр

10d

Low limit

value

High limit

value

IV. Recall the check weighing setting

1. Press the key followed by pressing the key to recall the Low limit

R

value.

R

2. Then press the key again to recall the High limit value.

3. Then press the key again to recall the buzzer setting.

4. Then press the key again to return the weighing mode.

R

V. Clear the check weighing settings

1. Press the key followed by pressing the key, and then press the

R

key to clear the Low limit value.

2. Press the key again to clear the High limit value and the buzzer setting.

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to enter the

After

The display shows the number

UNITS

4. COUNTING FUNCTION

.

. .

. . .

Press the key to enter the counting function. Press the key to return back

to the weighing mode.

(1). Sampling

Press the key counting function

Press number of desired items in the sample (10, 20, 50 or 100)

Place the sample on the scale and press the key

of items in the sample

. . . .

ACTION

.

. .

. . .

. . . .

Pcs

to choose the

.

. .

. . .

. . . .

the weight is stable

DISPLAY

STABLE

Pcs

NOTE:

v The larger the sample size, the more accurate the unit weight. (The minimum sample

weight = 20d)

v A sample size of 10 pieces gives a typical count accuracy of 95%. v A sample size of 50 pieces gives a typical count accuracy of 98%.

.

. .

SAMPLE TOO SMALL ( ) Þ Sample is less than 20 divisions.

UNIT WEIGHT TOO SMALL ( ) Þ Unit weight is less than 1/5 of a division.

. . .

. . . .

Pcs

Under such conditions, the scale can still work, but may result in lower count accuracy.

(2). Totalising

Refer to the operation of totalising in the weighing function on page 9.

(3). Check Weighing

Refer to the operation of check weighing function on page 13.

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→0← →0←

CONFIGURATION SETTINGS

Switch on the scale. While the scale is counting backward to zero, press and hold the

key until the display shows the software program version number: “ ”.

Release the key, the scale enters the configuration setting mode. is displayed.

Ù

Press the

Ù

key

Press the

Ù

key

Press the

TARE

key

key Press the

key

Press the

Press the Ù key

Press the

Ù

key

Press the

TARE