Table of Contents
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High-Precision Tuning Fork
Electronic Balance
GAI Series
(420～620～2200～4200)
Operation Manual
To ensure safe and proper use of the balance, please read
this manual carefully.
After reading this manual, store it in a safe place near the
balance, so you can review it as needed.
IMPORTANT
310002M21
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Table of Contents
Related Manuals for Scale House GAI420
Summary of Contents for Scale House GAI420
- Page 1 310002M21 High-Precision Tuning Fork Electronic Balance GAI Series (420～620～2200～4200) Operation Manual IMPORTANT To ensure safe and proper use of the balance, please read this manual carefully. After reading this manual, store it in a safe place near the balance, so you can review it as needed.
- Page 3 PREFACE Thank you for purchasing a GAI Series electronic balance. This is a precision instrument equipped with exacting mechanisms in a compact body. The GAI series provides enhanced functions, including a counting mode for stock control of parts, a percentage mode for comparative measurements given in percentages, and a limit function for measuring constant quantities by consecutive weighings.
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Page 4: Table Of Contents
CONTENTS CONTENTS…………………………………………………………..............3 1. Precautions on the Use……………….…………………………………………………………………..4 2. Names of Component Parts……………………………………………………………………………...8 2.1 Main Unit ………………………………………………………………………………………………8 2.2 LCD Indicators and Operating Keys ………………………………………………………………10 3. Basic Operations .......................... 12 3.1 Installation ..........................12 3.2 Operation Check ........................13 3.3 Operation for Tare Subtraction ....................14 4. -
Page 5: Precautions On The Use
13. Troubleshooting ......................... 43 14. Specifications ..........................44 14.1 Capacities and Minimum Indications for Different Indication Units ........44 15. Conversion Table of Units ......................46 RECYCLING INSTRUCTION ........................ 46 DECLARATION OF CONFORMITY ..................... 47 WARRANTY ............................47 1. Precautions on the Use ... - Page 6 The nature of problems that may result in the event of improper operation, and consequential effects on the quality and performance of the balance, are indicated under the two categories of "Caution" and "Recommended," and explained using symbols. 注 意 This symbol indicates a risk of injury or property damage if the CAUTION ！...
- Page 7 Do not place the balance on an unstable base or use the balance in a location where it may be subjected to shock. The loaded sample may fall off the measurement pan. 定格外禁止 Do Not Use Accurate measurement may be rendered impossible.
- Page 8 Avoid applying excess force or impact to the balance. Place the sample to be measured on the balance carefully to prevent breakage or 定格外禁止 Do Not Apply malfunction. Force Do not use the balance in a location were it may be subjected to abrupt changes in ambient temperature or humidity.
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Page 9: Names Of Component Parts
2. Names of Component Parts 2.1 Main Unit Round-pan types (GAI420, GAI620) Front View (round-pan type Windshield GAI420, GAI620) Supplied only with the round-pan types The top lid is detachable. See Page 40. Level For checking the level of the... - Page 10 Front View (Square-pan type) Measurement Level Liquid-crystal display (LCD) For checking See page 8 the level of the balance Turn the adjusters until the bubble rests Operation keys in the center of the See page 8. red circle. Rear View RS232C connector AC adapter...
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Page 11: Lcd Indicators And Operating Keys
2.2 LCD Indicators and Operating Keys 2.2.1 Symbols Displayed m om ％ Display Description Grams 0 Zero point T Tare being subtracted(effective when the lock switch is off) ○ Indication of stable balance (If the light is off, the balance is unstable.) ＊... - Page 12 2.2.2 Names and Functions of Operating Keys Operating Key Function Key to turn on/off the unit power On/off key [Brief press] initiates print or output. [Brief press] saves the settings of the number of pieces Memory key or percentages (%), or the limit value when using the limit function.
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Page 13: Basic Operations
3. Basic Operations 3.1 Installation Positioning the measurement pan First, mount the pan base on the main unit of the balance and place the measurement pan on top of it. Be sure to mount the pan base in the correct direction, as illustrated below. -
Page 14: Operation Check
Operation Check Turning on the power When the balance has the AC adapter connected, it displays [ ]. Pressing the On/Off The display section lights up, and the balance is ready for operation. Checking the display Check to see if the display has any missing indications or unlit parts. -
Page 15: Operation For Tare Subtraction
3.3 Operation for Tare Subtraction Place the tare (container) on the balance. As you place the tare, the balance indicates its weight. Reset read-out indication to zero. Press the Zero/Tare key. The tare is subtracted and the balance indicates zero. Load the sample to be weighed. - Page 16 ☆ Key Points of the Procedure ☆ The following applies equally to all the measurement modes for weight measurement, counting, and percentages. After the balance is switched off, there is still enough current to display [ ]. This indicates that the AC adapter is connected to an electrical outlet, but that the balance is turned off.
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Page 17: Functions
4. Functions 4.1 Setup and Checking of Functions Invoking the function Press and hold down the Function key until the indicator changes to “Func,” then release the key. The function setup mode is activated, and the first item, b.G. 1 (Bar graph) ] appears. Key released (See “4.2 Description of Functions”... -
Page 18: Description Of Functions
4.2 Description of Functions Item Set Value Description 0 Disable 1. b.G. Bar graph display ☆1 Enable ☆0 Disable 2.SEL Limit function 1 Enable Always judge (judges even when the balance is ☆1 unstable) Judgement 21.Co. condition Judge only when the balance is stable (does not judge if the balance is unstable) Ranges beyond +5 graduation is judged (ranges +5 graduation or below, including negative ranges, are... -
Page 19: Interface Section
☆3 20 [Pcs] 81.S.u. Setup of units of ☆4 1F [%] measurement to be displayed ☆5 00 Unit not set 85.S.u. 0 Disable Display of the Enable ( is the auxiliary scale interval.) auxiliary scale 9.Ai Note: The auxiliary-scale-interval place does not ☆1 interval represent a verification scale interval. -
Page 20: Switching Function For Units Of Measurement
5. Switching Function for Units of Measurement Pressing the Function key allows the user to switch the unit of measurement to [g], [ct], [%], and so on. Up to five different units can be registered for use only when the function key is properly set on a balance for which the lock switch is off. - Page 21 Pressing the [Set] key to restore measurement mode. Pressing the key will reset the measurement mode Pressing the [Function] key to change the units of Press the Function key. measurement Each press of the key changes the units of measurement to be displayed, as [g] ...
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Page 22: Counting Pieces
6. Counting Pieces To implement piece-counting, the specified samples are loaded on the balance, and their average unit weight (hereinafter, simply the “unit weight”) is entered and saved. The procedure for saving unit weights is called sampling. The counting procedure consists of loading articles that have already been sampled on to the balance. The number of pieces is then calculated by dividing the total weight of the loaded articles by the unit weight saved in memory. - Page 23 Changing the sampling number, if necessary. If samples to be counted widely deviate in weight, or a higher measure of accuracy is desired, it is recommended that users change the sampling number to a larger value. Press the Zero/Tare key. Each press of the key changes the value on the right end.
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Page 24: Increasing The Counting Accuracy (Memory Update Method)
6.2 Increasing the Counting Accuracy (Memory Update Method) ※This procedure is the same as the sampling procedure described on the previous page up, to the point at which the sampling number is changed. Loading samples Load the number of samples displayed. Count the samples precisely and load them on to the center of the measurement pan. -
Page 25: Measuring Percentage
7. Measuring Percentage The percentage measurement function operates by weighing an actual sample, selected as the reference, and saving its weight as the reference value and indexing it as 100%. When a measurement sample loaded on the balance is lighter or heavier than the reference, its weight is indicated as a percentage (%) value relative to the reference weight. - Page 26 ☆ Key Points of the Procedure ☆ While samples are being saved, the value indication disappears temporarily, and only the [M] mark flashes. If the balance is affected by wind or other vibrations during this process, the saving time may be prolonged. If [L-Err] appears briefly, it indicates one of the following states: The weight of the reference sample is insufficient.
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Page 27: Limit Function
8. Limit Function The limit function judges measurements according to a limit value saved in the balance. The function shows the judgement result by displaying the [ ] mark as either HI (excessive), OK (appropriate), or LO (insufficient). This function is very useful when discriminating between conforming and nonconforming articles. It is also useful when measuring a given constant quantity consecutively, in conjunction with a range of reference weights defined by upper- and lower-limit values. - Page 28 Selecting a function item Press the Function key. The display changes to the next item [Limit Function]. Setting the limit function Press the Zero/Tare key to set the value on the rightmost side to [1]. Limit function operations Setting the judgement condition Press the Function key.
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Page 29: Setup Of Limit Values By Actual Quantity Loads
8.2 Setup of Limit Values by Actual Quantity Loads Starting the limit function Press and hold down the key. Release the key when [L. SEt] is displayed. The currently set lower-limit value flashes. Continuous pressing Key released Loading the sample for the lower-limit value Load the sample of the lower-limit value on the measurement pan. -
Page 30: Setting Up Limit Values By Inputting Values
8.3 Setting up Limit Values by Inputting Values Starting the limit function Press and hold down the key. SEt ] is Release the key when [L. displayed. The currently set lower-limit value flashes. Continuous pressing Key released Opening the value input screen Press the Zero/Tare key. - Page 31 Opening the value input screen Press the Zero/Tare key. Follow the same procedure as in “Step 2.” Setting the upper-limit value Follow the same procedure as described for the lower-limit value and enter the upper-limit value. 10 Saving the upper-limit value Press the Memory key.
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Page 32: Calibrating The Balance
“span adjustment,” is required to produce accurate measurements. 9.1 Calibration of GAI Series Applicable models: GAI420, GAI620, GAI2200, GAI4200 ※ Span adjustment should be performed with the balance installed perfectly level and without any load on the measurement pan. - Page 33 End of calibration of weighing capacity point Display switches to [CAL.oFF] to indicate that adjustment of the weighing capacity point is complete. End of span adjustment Return the calibration knob back to the [For Use] position. To do so, slowly turn the knob until the internal For Use mechanism engages with a click.
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Page 34: Glp-Compliant Print
9.2 GLP-compliant print At calibration, the AJH-CE Series enables printing in a format compliant with GLP. Set the function to the GLP print support ([0.GLP 1]) side, then connect the balance to a printer or other equipment. When calibration is complete, the balance prints out the format illustrated below. -
Page 35: Input/Output Functions
10. Input/output functions 10.1 Terminal Numbers and Functions Terminal Number Signal Input/output Function & remarks ※ EXT.TARE Input External tare subtraction Output HIGH (when balance is powered-up) Input Receiving data Output Transmitting data — Signal ground Compatible plug: TCP 0556-01-0201 (Hoshiden - supplied with balance) RS232C connector (DIN 5-pin): Rear panel ※Tare subtraction (zero adjustment) is possible by connecting an external tare subtraction input and a signal ground, through contacts or a transistor switch. -
Page 36: Connection Between Balances And Personal Computers
10.2 Connection between Balances and Personal Computers Sample connection with an IBM-PC/AT compatible IBM-PC/AT compatible Balance D-SUB9P DIN5P Sample connection with PC9801 PC9801 Balance D-SUB25P DIN5P... -
Page 37: Interface Specifications
10.3 Interface Specifications Transmission system Serial transmission with start-stop synchronization Transmission rates 1200/2400/4800/9600 bps. Transmission codes ASCII codes (8-bit) Signal levels Compliant with EIA RS-232C HIGH level (Data logic 0) +5 to +15 V -5 to -15 V LOW level (Data logic 1) One-character bit configuration Start bit: 1 bit Data bit:... -
Page 38: Output Data
10.4 Output Data By changing the function settings on the main unit of the balance, users can select either of the following formats: (See “4.2 Description of Functions,” on page 13.) 10.4.1 Data Format Six-digit numeric format Composed of 14 characters, including the terminators (CR = 0DH, LF = 0AH). Seven-digit numeric format Composed of 15 characters, including the terminators (CR = 0DH, LF = 0AH). - Page 39 10.4.3 Numeric data Six-digit numeric format: (D1–D7: seven characters) Seven-digit numeric format: (D1–D8: eight characters) Six-digit numeric format for model provided with an auxiliary scale interval: (8 characters, from D1 to D8) Seven-digit numeric format for model provided with an auxiliary scale interval: (9 characters, from D1 to D9) D1–D7 (D8) Code...
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Page 40: Input Commands
10.4.5 Result of judgment when operating the balance with the limit function (S1: one character) Code Description LO (LOW) OK (GOOD) HI (HIGH) (SP) No limit value specified 10.4.6 Status (S2: one character) Code Description Data stable Data unstable Data error (data other than S2 is invalid.) [o-Err], [u-Err] (SP) No status specified... -
Page 41: Operating The Balance With The Battery
Instruction for tare subtraction (zero adjustment) Code Description Value Response A00: Normal end Instruction for tare E01: Tare subtraction cannot be (SP) subtraction (zero None executed due to an error in adjustment) the weight value. Setup of output control Code Description Ｏ... -
Page 42: Charging Method
Drive time: Approximately 24 continuous hours Number of charge/discharge cycles: 300 or more 11.2 Charging Method ※While the balance is battery-operated, [ ] stays on. The indicator flashes [ ] (charging required) when battery capacity decreases. If the balance flashes [ ], charge the battery by following these steps: Connect the dedicated AC adapter to the balance. -
Page 43: Windshield Setting
12. Windshield Setting Components Panel（ 2 large & 2 small ） Cover step (1) Set a small panel in a large panel. step An edge with step should face the same side. (2) Set the other large panel in the assembly above. (3) Set the other small panel in the assembly above. -
Page 44: Troubleshooting
13. Troubleshooting ※ The numbers in ( ) indicate reference pages Symptom Cause Possible remediation The AC adapter is not connected. Check that the AC There is no indication on the display. adapter is connected (8). The balance is subject to air currents or ... -
Page 45: Specifications
14. Specifications 14.1 Capacities and Minimum Indications for Different Indication Units Model GAI420 GAI620 Unit of measurement displayed 0.01 0.01 0.001 0.001 2100 3100 (ct) 0.01 0.01 (oz) 0.001 0.001 0.0001 0.0001 0.92 (lb) 0.0001 0.0001 0.00001 0.00001 (ozt) 0.001 0.001... - Page 46 Model 2200 4200 Unit of measurement displayed 2200 4200 0.01 0.01 11000 21000 (ct) (oz) 0.01 0.01 0.001 0.001 0.001 0.001 (lb) 0.0001 0.0001 (ozt) 0.01 0.01 0.001 0.001 1400 2700 (dwt) 0.01 0.01 0.01 0.01 (Hong Kong) 0.001 0.001 (Singapore, 0.01 0.01...
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Page 47: Conversion Table Of Units
15. Conversion Table of Units unit gram carat ounce pound troy ounce penny weight 0.03527 0.00220 0.03215 0.64301 0.00705 0.00044 0.00643 0.12860 28.34952 141.74762 0.06250 0.91146 18.22917 453.59237 2267.96185 14.58333 291.66667 1ozt 31.10348 155.51738 1.09714 0.06857 1dwt 1.55517 7.77587 0.05486 0.00343 0.05 0.06480... -
Page 48: Declaration Of Conformity
WARRANTY Scale House products are guaranteed for a period of twelve months from delivery, excluding the parts classified as expendable materials such as mechanical printing heads, batteries, electric motors and wheels. The warranty for these expendable materials is three months. The warranty refers to breakdowns resulting from any construction defect or material defect of the product supplied and covers the cost of labor and spare parts.