AD-6121A Instruction Manual

This Manual and Marks All safety messages are identified by the following, “WARNING” or “CAUTION”, of ANSI Z535.4 (American National Standard Institute: Product Safety Signs and Labels). The meanings are as follows:

WARNING CAUTION

A potentially hazardous situation which, if not avoided, could result in death or serious injury. A potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

This is a hazard alert mark. This manual is subject to change without notice, at any time, to improve the product. The product specifications and the contents of this manual are subject to change without any obligation on the part of the manufacturer to update past products. Windows is a registered trademark of Microsoft Corporation.

2007

All rights reserved.

CONTENTS 1.

PRECAUTIONS ...2 1.1. Safety Precautions ...2 1.2. Handling Precautions ...2 1.2.1. Installation...2 1.2.2. Precautions for use ...2

2.

COMPLIANCE WITH COUNCIL DIRECTIVES ...3

3.

FEATURES ...3

4.

PART NAMES AND ACCESSORIES ...4 4.1.

5.

Display Symbols and Switches ...5

BEFORE USE ...6 5.1. Preparation Procedure ...6 5.1.1. Using the AC adapter ...6 5.1.2. Using the batteries ...6

6.

USING THE SCALE ...7 6.1. 6.2.

7.

Basic Weighing ...7 Weighing with a Tare ...8

CALIBRATION...9 7.1. 7.2. 7.3.

8.

About Calibration...9 Calibration Using a Calibration Weight...9 Adjusting the Gravitational Acceleration...12

DATA COMMUNICATION...13 8.1. RS-232C Serial Interface ...13 8.1.1. Interface specifications ...13 8.1.2. Data format ...13 8.1.3. Output timing...13 8.2. Connecting to a Personal Computer ...14 8.2.1. Connection procedure...14 8.2.2. Communication example ...14

9.

MAINTENANCE ...15 9.1. 9.2. 9.3.

Maintaining the Performance Quality ...15 Cleaning the Scale ...15 Storing the Scale ...15

10.

BEFORE ASKING FOR REPAIR ...16

11.

SPECIFICATIONS ...17

11.1. 11.2. 11.3. 12.

Specifications...17 External Dimensions...17 Options ...18

APPENDIX ...19

12.1. 12.2.

The Value of Gravity at Various Locations ...19 World Map ...20 -1-

AD-6121A

1. PRECAUTIONS 1.1. Safety Precautions CAUTION Do not place the scale on a soft, wet or slippery floor. Place the scale on a solid and level floor. Do not place the scale in areas where it can be tripped over or kicked. Do not step on the scale if your feet are wet. Step on the center portion of the scale gently. Do not step on the display window. When carrying the scale, be sure to hold it by the handle, and do not swing around or bump the scale. Do not disassemble or modify the scale. Keep the scale free of moisture, dust and foreign materials. Only qualified personnel can repair the scale. Attempting repairs yourself may cause a fire or damage to the scale. Damage caused by attempting to do the repair yourself will void the warranty.

1.2. Handling Precautions 1.2.1.

Installation

Place the scale on a flat floor free from vibrations and drafts. The floor should be solid enough to support the weight of the scale and the person being weighed. Place the scale where it is not exposed to direct sunlight. Place the scale where it is not exposed to external noises and strong electromagnetic waves. Place the scale where there are no corrosive, flammable, or explosive substances. Keep the temperature and the humidity of the installation site within the specified operating temperature range/humidity.

1.2.2.

Precautions for use

The maximum weighing capacity of the scale is 150 kg. Do not place anything on the scale that is beyond the weighing capacity. Stand still on the scale during weighing operation. Keep the cables of the AC adapter and other options away from the scale top surface. If they are in contact to the scale surface, a weighing error may occur. Press the ON/OFF switch and the ZERO switch gently. Do not kick them. AD-6121A

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2. COMPLIANCE WITH COUNCIL DIRECTIVES This device conforms to the following Council Directives. Council directive 89/336/EEC

EN61326

EMC directive

Council directive 73/23/EEC

EN61010-1

Low voltage directive

3. FEATURES AD-6121A is a verified compact, lightweight scale that can be carried. Three displaying modes are available: Personal

Holds the weight on the display for about 5 seconds after the person being weighed steps off the scale.

Screening

Holds the weight on the display while the person being weighed is on the scale.

Scale

Displays the weight without holding it. Suitable to the weighing with a tare.

The displaying direction can be changed. The direction for a person other than the person being weighed to read and record the weight.

The direction for the person being weighed to read the weight

The display is equipped with the backlight so that the weight can be read in dark areas. (Only when the AC adapter is used.) The buzzer indicates the weighing conditions. The buzzer can be switched off. Power is supplied by either batteries or the AC adapter. Automatic power shut-off function, when batteries are used, turns off the power automatically after two minutes of non-operation.

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AD-6121A

4. PART NAMES AND ACCESSORIES Handle LCD Spirit level

Weighing surface ZERO switch ON/OFF switch

Leveling foot

Buzzer switch

Terminal

Battery compartment

Mode selection switch AC adapter input jack Display direction switch Leveling foot ON/OFF switch

ZERO switch

Accessories

AC adapter

Instruction manual

Note The shape of the adapter plug may differ from that of the illustration, depending on the country where the scale is used. Please confirm that the AC adapter type is correct for your local voltage and receptacle type. AD-6121A

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4.1. Display Symbols and Switches Stable mark Unit Display hold mark

Tare mark

Unit Low battery mark

Switches

Display symbols Symbols Stable mark

Description This symbol appears when the displayed weight is stable.

Tare mark

This symbol appears when tare operation is in progress.

Low battery mark

This symbol appears when the batteries are drained. Replace the batteries with four new type AA batteries.

Display hold mark

This symbol appears when the scale holds the weight on the display.

Switches Switches

Description

ON/OFF switch

Turns the scale on and off. Sets the displayed weight to zero. When this switch is pressed after placing an object of 3 kg or more on the scale, the tare mark turns on.

ZERO switch Mode selection switch

Selects how the scale holds the displayed weight.

Personal

Holds the weight when it becomes stable and displays the value for about 5 seconds after the person being weighed steps off the scale. Used when the person being weighed reads the value. When changes of 3 kg or more occurs in the value, or 5 seconds after the person being weighed steps off the scale, the display hold is released.

Screening

Holds the weight when it becomes stable and displays the value as long as the person being weighed is on the scale. When the person steps off the scale, the display hold is released. Used when a person other than the person being weighed reads the value. When changes of 3 kg or more occurs in the value, the display hold is released.

Scale

Does not hold the value. Used for weighing an object other than body weight.

Display direction switch

Selects the display direction. Used when the person being weighed reads the weight. Used when a person other than the person being weighed reads the weight.

Buzzer switch

Selects whether to sound the buzzer or not.

On

Sounds the buzzer when the scale is turned on or the scale holds the weight.

Off

Does not sound the buzzer.

Note The settings of the Mode selection switch, Display direction switch and Buzzer switch become effective after the ON/OFF switch is turned off and then turned on again. -5-

AD-6121A

5. BEFORE USE 5.1. Preparation Procedure Spirit level

1 Use the accessory AC adapter or four type AA alkaline batteries. Good No good

2 Place the scale on a solid floor and level the scale using the leveling feet so that the bubble in the spirit level is centered.

5.1.1.

Leveling foot

Using the AC adapter

1 Insert the AC adapter plug into the AC adapter input jack, and the AC adapter into an electrical outlet.

AC adapter input jack

AC adapter

5.1.2.

Using the batteries CAUTION

When installing the batteries, match the + (positive) and – (negative) terminals to those indicated in the battery compartment. Use four type AA batteries. Do not mix old and new batteries. Remove the batteries if the scale is not to be used for a long period of time. The batteries may leak and cause a malfunction. If the battery liquid spills on the body, wash the body part under running water immediately. When the Low battery mark appears, replace the batteries with four new type AA batteries. Please note that the Low battery mark does not appear when the batteries are completely drained. Even when the batteries are installed, connecting the AC adapter will make the AC adapter effective. When the batteries are used, the backlight does not turn on.

1 Remove the battery compartment cover. 2 Install four new type AA batteries into the battery compartment, taking care that the polarities (+) and (-) are correct. 3 Replace the battery compartment cover. AD-6121A

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6. USING THE SCALE 6.1. Basic Weighing 1 Make sure that nothing is placed on the scale. AC adapter

2 Press the ON/OFF switch to turn the scale on. All the display segments turn on and then the zero display appears.

Nothing on the scale

ON/OFF switch

When the AC adapter is used, the display backlight turns on.

ZERO switch

3 Press the ZERO switch. If the displayed value is not zero, press the ZERO switch.

4 Step on the scale gently and read the weight.

Zero display

Step on

The scale displays the weight. When the value is stable, the Stable mark

turns on. Stable mark

Weight

5 Step off the scale gently. Step off

6 To weigh again, repeat steps 3 to 5.

7 Press the ON/OFF switch to turn the scale off.

6.2.

ON/OFF switch

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AD-6121A

6.2. Weighing with a Tare In weighing with a tare, the scale stores the tare weight, turns on the tare mark net weight. The tare range is 3 kg to 150 kg.

and displays the

Net weight = Gross weight – Tare weight (Example of tare items: Clothes, plate and container) For weighing an object other than body weight, the scale mode, that does not hold the weight, is convenient.

Procedure for weighing with a tare 1 Make sure that nothing is placed on the scale.

AC adapter

2 Press the ON/OFF switch to turn the scale on.

ON/OFF switch

Nothing on the scale

All the display segments turn on and then the zero display appears. If the displayed value is not zero, press the ZERO

Place the tare

switch.

3 Place the tare on the scale gently.

ZERO switch

Place a tare item of 3 kg or more on the scale. When the value is stable, the Stable mark

Zero display

turns on.

4 Press the ZERO switch. The tare mark

Step on

turns on and the display is set to zero.

5 Place the object to be weighed on the scale and read the weight.

Stable mark

The scale displays the net weight. When the weight is stable, the Stable mark

turns on.

Net value (Weight)

6 Remove the object weighed with a tare from the scale. Step off

7 Press the ON/OFF switch to turn the scale off. ON/OFF switch

Releasing “Weighing with a tare” (Canceling the tare mark

)

With nothing on the scale, press the ZERO switch. Press the ON/OFF switch to turn off the scale and press the ON/OFF switch to turn on the scale again.

AD-6121A

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7. CALIBRATION 7.1. About Calibration Calibration is the function to adjust the scale so that it can weigh accurately. When the verification seal is broken, re- verification is required. CAL switch cover

CAL switch

Break the verification seal and locate the CAL switch cover on the scale bottom. Slide the CAL switch cover in the direction indicated by the arrow. The CAL switch is on the board inside. When pressing the CAL switch, do not use a sharp object such as a ballpoint pen. It may cause the scale to malfunction. Bottom of the scale

7.2. Calibration Using a Calibration Weight 1 While holding down the CAL and ZERO switches, press and hold the ON/OFF switch for about 2 seconds. All of the display segments turn on. Release the switches after about 2 seconds.

2 While all the display segments are on (about 5 seconds), press the CAL switch 3 times. The display indicates [- - - -]. If the CAL switch is not pressed 3 times within about 5 seconds after step 1, the power will be turned off automatically.

3 Press the ZERO switch. The display indicates [C-0].

4 Press the ZERO switch several times until [C-5] is displayed. Each time the ZERO switch is pressed, the number increases by 1; [C-0] [C-1] [C-2] ….

5 Press the ON/OFF switch. The display indicates [20], which means the temperature for calibration is 20°C. Here, adjust the value as necessary.

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AD-6121A

6 Press the ZERO switch to adjust the temperature setting. When the Display direction switch is set to ↑, each time the ZERO switch is pressed, the number increases by 1. When the Display direction switch is set to ↓, each time the ZERO switch is pressed, the number decreases by 1.

Display direction switch

The display value increments

The display value decrements

7 Press the ON/OFF switch. The scale stores the new temperature setting for calibration and [C-6] is displayed.

8 Press the ON/OFF switch. The display indicates [9798], which means the gravitational acceleration setting for the calibration site is 9.798 m/s2. Here, adjust the value as necessary.

9 Press the ZERO switch to adjust the gravitational acceleration. When the Display direction switch is set to , each time the ZERO switch is pressed, the number increases by 1. When the Display direction switch is set to , each time the ZERO switch is pressed, the number decreases by 1.

Note

Display direction switch

The display value increments

The display value decrements

The gravity values for various locations are listed on page 19.

10 Press the ON/OFF switch. The scale stores the new gravitational acceleration value and [C-7] is displayed.

11 Press the ZERO switch several times until [C-10] is displayed. Each time the ZERO switch is pressed, the number increases by 1; [C-8] [C-9] [C-10] ….

12 Press the ON/OFF switch. The display indicates the AD count for the current output of the thermo-sensitive resistor. Wait for the Stable mark to turn on.

13 When the Stable mark is displayed, press the ON/OFF switch. The scale stores the AD count for the current output of the thermo-sensitive resistor and moves to the next item [C-11]. When the ZERO switch is pressed in place of the ON/OFF switch, the scale moves to [C-11] without storing the AD count. AD-6121A

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Stable mark

14 With [C-11] displayed, press the ON/OFF switch. The display indicates [CAL0]. Stable mark

15 Make sure that nothing is placed on the scale and wait for the Stable mark to turn on. 16 Press the ON/OFF switch. The scale stores the zero point data and moves to the next item [C-12]. When the ZERO switch is pressed in place of the ON/OFF switch, the scale moves to [C-12] without storing the zero point data.

17 With [C-12] displayed, press the ON/OFF switch. The display indicates [CAL1]. Stable mark

18 Place a 150-kg (weighing capacity) weight on the scale and wait for the Stable mark to turn on. 19 Press the ON/OFF switch. The scale stores the span data and moves to the next item [END]. When the ZERO switch is pressed in place of the ON/OFF switch, the scale moves to [END] without storing the span data.

20 After the scale indicates [END], the power is turned off automatically. Remove the weight from the scale. Calibration has been completed.

Note A room with a temperature of around 25 ºC with little temperature change is needed. Perform calibration only after the temperature of a scale and the temperature of the room are the same. Place the scale on a level surface, and after pre-load do not move the scale until calibration is over.

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AD-6121A

7.3. Adjusting the Gravitational Acceleration Adjust the gravitational acceleration to that of the installation site. When the scale is transported to a different area, the adjustment is required.

Note The gravity values for various locations are listed on page 19.

1 Set the Mode selection switch to [Personal]. 2 While holding down the CAL switch, press and hold the ON/OFF switch for about 2 seconds.

Mode selection switch

All of the display segments turn on. Release the switches after about 2 seconds.

3 While all the display segments are on (about 5 seconds), press the CAL switch 3 times. The display indicates [9798], which means the gravitational acceleration setting for the installation site is 9.798 m/s2. If the CAL switch is not pressed 3 times within about 5 seconds after step 2, the power will be turned off automatically.

4 Press the ZERO switch to adjust the gravitational acceleration.

Display direction switch

When the Display direction switch is set to , each time the ZERO switch is pressed, the number increases by 1. When the Display direction switch is set to , each time the ZERO switch is pressed, the number decreases by 1.

5 Press the ON/OFF switch.

The display value decrements

The scale stores the new gravitational acceleration value and the power is turned off automatically.

AD-6121A

The display value increments

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8. DATA COMMUNICATION 8.1. RS-232C Serial Interface The AD-6121A scale has an RS-232C serial interface installed as standard. Using the optional RS-232C cable (AX-KO2238), the scale can send the data to external devices such as a personal computer.

8.1.1.

Interface specifications

Transmission system Transmission form Baud rate Data bits Parity Stop bit Code Terminator

8.1.2.

: EIA RS-232C : Asynchronous, half duplex : 2400 bps : 7 bits : 1 bit, Even, Odd : 1 bit : ASCII : CR LF (CR: 0Dh, LF: 0Ah)

Data format

Data

Unit

Terminator

Stable header: Added when the Stable mark

is turned on.

Unstable header: Added when the weight value is not stable. Overload header: Added when the weight value is beyond the weighing capacity. When overloading, [E] or [-E] appears on the display. Space (

20h)

Carriage return (CR: 0Dh) Line feed (LF: 0Ah)

8.1.3.

Output timing Mode selection switch

Output timing

Personal, Screening

Outputs the weight value once when the scale holds it on the display.

Scale

Outputs the weight value 4 or 5 times per second after zero display.

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AD-6121A

8.2. Connecting to a Personal Computer 8.2.1.

Connection procedure

The below is an example of connecting the scale to a Windows-based personal computer.

1 Insert the optional RS-232C cable (AX-KO2238) into the LINE (External output terminal) jack Optional RS-232C cable AX-KO2238 located on the bottom of the scale. 2 Insert the D-Sub 9-pin connector of the RS-232C cable into the RS-232C port (COM1 port) located on the personal computer.

8.2.2.

External output terminal LINE

Personal computer

Communication example

The below is an example of communication with a Windows-based personal computer.

1 Make a connection between the scale and the personal computer as described above. 2 Select [Start], [Program], [Accessories] and [Hyper Terminal]. If Hyper Terminal is not installed, install it using [Add Remove Programs]. 3 Double-click the Hyper Terminal icon to start Hyper Terminal. Click [Cancel] when a guide to the modem installation appears. 4 A new window opens. Give it a proper name and click [OK]. 5 The settings window appears. Select [Direct to COM1] for connection method and click [OK]. 6 Set the port on the COM1 properties window and click [OK]. Baud rate Data bits Parity Stop bit Flow control

: 2400 bps : 7 bits : 1 bit, Even, Odd : 1 bit : Hardware

7 Press the ON/OFF switch to turn the scale on. 8 The data is output as described in “8.1.3 Output timing” and displayed on the personal computer. AD-6121A

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9. MAINTENANCE 9.1. Maintaining the Performance Quality Check the scale regularly to make sure that it weighs correctly, and perform inspection or calibration as necessary. For details on inspection or calibration, contact the local A&D dealer.

9.2. Cleaning the Scale To clean the scale, use a soft cloth that is moistened with water and a mild detergent solution. After moistening, the cloth must be squeezed or rung out, so that it is not dripping wet. Do not use organic solvents such as thinner, benzine or methanol to clean the scale. Do not use a disinfectant that contains chlorine to clean the scale. Do not expose the scale to strong ultraviolet radiation or high temperature water vapor.

9.3. Storing the Scale When storing the scale: Make sure that nothing is placed on the scale. Make sure that the ON/OFF switch is not left pressed. Remove the batteries. Do not store the scale: Where it is exposed to high temperature or high humidity. Where salinity, sulfur content or corrosive gases exist. Where chemicals are stored.

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AD-6121A

10. BEFORE ASKING FOR REPAIR Before asking for repair, refer to the table below. When

What to do

Nothing appears on the display, even

Check whether the AC adapter or batteries are installed correctly.

when the scale is turned on.

Check whether the batteries are drained.

[----] remains on the display and does

Check that nothing is placed on the scale.

not change.

Check that nothing is touching the scale.

The difference between an estimated

Check that the scale is leveled.

weight and the actual weight is large.

Check that nothing is touching the scale.

The switches do not function.

Disconnect the AC adapter and connect it again. Then, turn the

The display does not change even

power on.

when the switches are pressed.

Remove the batteries and insert them again. Then, turn the power on.

[E-1] , [E-2] or [E-4] appears on the display. The buzzer remains sounding. [ E ] appears.

Ask for repair. Check whether the ON/OFF switch is left pressed. This error appears when the object on the scale is beyond the weighing capacity. Remove the object from the scale. This error appears when the weight value is less than 3 kg.

[ -E ] appears

Check that nothing is placed on the scale and nothing is touching the scale. Then, turn the scale off and turn it on again.

AD-6121A

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11. SPECIFICATIONS 11.1. Specifications Type

AD-6121A

Maximum weighing capacity

150 kg

Minimum display

100 g

Minimum weighing capacity

2 kg

Maximum tare

Maximum weighing capacity

Display

LCD with backlight (Backlight: Only when the AC adapter is used.) Displaying direction can be changed.

Operating temperature range/humidity

+5°C to +35°C, 85%RH or less, No condensation

Power supply

AC adapter or four type AA batteries (Not included)

Battery life

Approx. 1000 weighing operations (Varies depending on the type and ambient temperature.)

Buzzer

Buzzer switch to turn the buzzer on and off

External dimensions

314 (D) x 315 (W) x 57 (H) mm

Weight

Approx. 3.0 kg

11.2. External Dimensions

Unit: mm

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AD-6121A

11.3. Options RS-232C cable Use

AX-KO2238 RS-232C cable D-Sub 9-pin

Length

AD-6121A

2m

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