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This document hosted by: www.oldwillknottscales.com
High-Precision Tuning Fork
Electronic Balance
AJ-NT/DBNT
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
SHINKO DENSHI CO., LTD.
200046M11
Series
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Summary of Contents for Vibra AJ220NT/DBNT
- Page 1 This document hosted by: www.oldwillknottscales.com 200046M11 High-Precision Tuning Fork Electronic Balance AJ-NT/DBNT Series 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 an AJ Series electronic balance. This is a precision instrument equipped with exacting mechanisms in a compact body. The AJ series provides enhanced functions, including a counting mode for stock control of parts, and a limit function for measuring constant quantities by consecutive weighings.
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Page 4: Table Of Contents
CONTENTS 1. Precautions on the Use ....2 9. Input/output functions ......31 1.1 Warnings regarding Use....2 9.1 Terminal Numbers and Functions..31 1.2 For More Precise Measurements .. 5 9.2 Connection between Balances and 2. Names of Component Parts ..... 8 Personal Computers......32 2.1 Main Unit ........ -
Page 5: Precautions On The Use
1. Precautions on the Use 1.1 Warnings regarding Use • This Section "Precautions Relating to Use" sets forth precautionary notes that the user should observe in order to prevent physical injury to the user and/or damage to property. • 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"... - Page 6 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. Do Not Use 定格外禁止 • Accurate measurement may be rendered impossible.
- Page 7 Do not use the balance when [o-Err] (Overloaded) is displayed. • Take down the loaded sample immediately to prevent breakage or malfunction. 定格外禁止 Do Not Overload Do not use the balance in a location where it is subject to direct sunlight. •...
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Page 8: For More Precise Measurements
For More Precise Measurements To be able to conduct more precise measurements, it is necessary to minimize the factors that contribute to measurement errors. There are a great variety of such error-inducting factors, which can be linked to machine error and performance of the balance itself, as well as the properties and condition of samples being measured, and the measuring environment (e.g., vibration, temperature/humidity). - Page 9 1-2-2 Precautions on the Measuring Bench Vibration/ If the balance is subjected to vibration during measurement, its indications will → become unstable, thus preventing accurate measurement from being Shaking conducted. To avoid this situation, select a solid measuring bench that is less susceptible to vibration.
- Page 10 1-2-4 Precautions on the Main Unit of the Balance Precautions A transparent dust cover, supplied for some models, may be statically → on Use charged under low humidity conditions, which may cause unstable readinig. In such case, wipe the dust cover with a damp cloth or use a commercial antistatic agent.
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Page 11: Names Of Component Parts
2. Names of Component Parts 2.1 Main Unit Capacity(g) Pan type 220～620 Round 820～12K Square Front View (round-pan type) Windshield Supplied only with the round-pan types The top lid is detachable. Level For checking Dry Cell Box the level of the (DBNT) ON/OFF balance... -
Page 12: Keys
2.2 LCD Indicators and Operating Keys 2.2.1 Symbols Displayed ＨＩ ＯＫ ＬＯ Display Description Grams →0← Zero point ○ Indication of stable balance (If the light is off, the balance is unstable.) ＊ Balance powered up (Lights up when the power is turned off) or data transmitted Counting mode percentages mode Indication of judgement result (HI/OK/LO) when the limit function is active. - Page 13 2.2.2 Names and Functions of Operating Keys Operating Key Function Key to turn on/off the unit power On/off key ON/OFF [Brief press] initiates print or output. [Brief press] saves the settings of the number of pieces, Memory key or the limit value when using the limit function.
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Page 14: 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 15 3 Put on the windshield Put the cover on top and place the complete assembly along the guide. ON/OFF Securing the exact level of the balance Turn the adjusters until the bubble rests in the center of the red circle on the level.
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Page 16: Operation Check
3.2 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 17: Operation For Zero Adjustment
3.3 Operation for Zero Adjustment Place the container on the balance. As you place the container, the balance indicates its weight. Reset read-out indication to zero. Press the Zero key. The container is subtracted and the balance indicates zero. Load the sample to be weighed. The balance will now indicate only the weight of the sample loaded in the container. - Page 18 ☆ 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. When the balance is switched on again, [＊] will disappear.
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Page 19: 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, [1. b.G. 1 (Bar graph) 1] appears. (See “4.2 Description of Functions”... -
Page 20: Description Of Functions
4.2 Description of Functions Item Set Value Description Disable 1. b.G. Bar graph display ☆1 Enable ☆0 Disable 2.SEL Limit function 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 21: Interface Section
4.3 Interface Section I.F. Displayed when [7. ] is set to [1] or [2] Item Set Value Description 0 Stop output 2 Output continuous if stable (stop output if unstable) Outputs once if stable. Outputs if the balance is stable when a sample is loaded after the preceding sample has been removed and the balance indicated zero, or less. -
Page 22: Switching Function For Unit Of Measurement
5. Switching Function for Units of Measurement 5.1 Switching Units of Measurement Pressing the Function key allows the user to switch the unit of measurement to [g], [ct] and so on. Switching the units of measurement to be displayed Press the Function key. - Page 23 Example: To change the default factory settings to pound units use [82.S.u.] . (cont.) 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.
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Page 24: 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 25 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 key. Each press of the key changes the value on the right end.
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Page 26: Increasing The Counting Accuracy
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 27: Measuring Percentage (Aj-Nt Only)
7. Measuring Percentage (AJ-NT Type only) 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 28 ☆ 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 29: 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. - Page 30 8.1 Limit Function Setup (cont.) Selecting a function item Press the Function key. The display changes to the next item [Limit Function]. Setting the limit function Press the Zero key to set the value on the rightmost side to [1]. Setting the judgement condition Press the Function...
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Page 31: 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. ] is displayed. The currently set lower-limit value flashes. Loading the sample for the lower-limit value Load the sample of the lower-limit value on the measurement pan. - Page 32 8.3 Setting up Limit Values by Inputting Values Starting the limit function Press and hold down the key. Release the key when [L. ] is displayed. The currently set lower-limit value flashes. Opening the value input screen Press the Zero key.
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Page 33: Setting Up Limit Values By
8.3 Setting up Limit Values by Inputting Values (cont.) Opening the value input screen Press the Zero 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. -
Page 34: Input/Output Functions
9. Input/output functions 9.1 Terminal Numbers and Functions Terminal Number Signal Input/output Function & remarks ※ EXT.ZERO Input External Zero adjustment Output HIGH (when balance is powered-up) Input Receiving data Output Transmitting data — Signal ground RS232C connector (DIN 5-pin female): Rear ※Zero adjustment is possible by connecting an external zero adjustment input and a signal ground, through contacts or a transistor switch. -
Page 35: Connection Between Balances And
9.2 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 36: Interface Specifications
9.3 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 +5 to +15 V HIGH level (Data logic 0) -5 to -15 V LOW level (Data logic 1) One-character bit configuration Start bit: 1 bit... -
Page 37: Output Data
9.4 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 17.) 9.4.1 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 38 9.4.3 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 39: Input Commands
9.4.5 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 9.4.6 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 40 9.5.2 Command format Command format Composed of four characters (ASCII), including the terminators (CR=0DH, LF = 0AH) Instruction for zero adjustment Code Description Value Response A00: Normal end Instruction for E01: Zero adjustment cannot be (SP) None zero adjustment executed due to an error in the weight value.
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Page 41: Battery
10. Operating the Balance with the Battery This function can be used only when the balance is battery-operated. 10.1 Specifications ●Built-in nickel-cadmium battery ●Charging time: Approximately 12 hours ●Drive time: Approximately 24 continuous hours ●Number of charge/discharge cycles: 300 or more 10.2 Charging Method ※While the balance is battery-operated, [... -
Page 42: Operating The Balance With The
11. Operating the Balance with the Dry Cell Battery (DBNT) This function can be used only when the balance is dry-cell-battery-operated. 11.1 Specifications • Cell type for use: 9 Volt (006P) ( alkali type recommended ) • Drive time: Approximately 20 continuous hours ※depend on model, storage and operation condition 11.2 User Precautions... -
Page 43: Troubleshooting
12. 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 adapter is connected on the display. (12). • The balance is subject to air currents or →... -
Page 44: Specifications
13. Specifications 13.1 Basic Specifications Model 220NT 320NT 420NT 620NT 820NT 1200NT /DBNT /DBNT /DBNT /DBNT /DBNT /DBNT 220g 320g 420g 620g 820g 1200g 0.02g 0.02g 0.02g 0.1g 0.5g 0.01g 0.01g 0.01g 0.01g 0.01g 0.1g 0.001g 0.001g 0.001g 0.001g 0.01g Accuracy class classⅡ... -
Page 45: Common Specifications
13.2 Common Specifications Zero adjustment range........Total capacity Liquid-crystal display (LCD)......Seven segments (two segments in leading part) , Maximum digits indication: seven digits, Segment height: 16.5 mm. Overload indication ......... [o-Err] is displayed if weight capacity + 9 intervals are exceeded. -
Page 46: For Different Indication Units
Model 2200NT 3200NT 4200NT 6200NT 8200NT 12KNT Unit of /DBNT /DBNT /DBNT /DBNT /DBNT /DBNT measurement displayed 2200 3200 4200 6200 8200 12000 0.01 0.01 0.01 0.01 11000 16000 21000 31000 41000 60000 (ct) (oz) 0.01 0.01 0.01 0.01 0.05 0.05 0.001 0.001... -
Page 47: Conversion Table Of Units
14. Conversion Table of Units unit gram carat ounce pound troy ounce penny grain weight 0.03527 0.00220 0.03215 0.64301 15.43236 0.00705 0.00044 0.00643 0.12860 3.08647 28.34952 141.74762 0.06250 0.91146 18.22917 437.5 453.59237 2267.96185 16 14.58333 291.66667 7000 1ozt 31.10348 155.51738 1.09714 0.06857 1dwt...
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