AJ Service Manual
Contents
1. 2 1 1 Warnings regarding Use 2 1 2 For More Precise Measurements 5 2 Names of Component Parts 8 AT Mam 9 eee tee nce tee eeerene 8 2 2 LCD Indicators and Operating KOY pen S 9 3 Basic Operations 08 11 iil Msala hoN 11 3 2 Operation Check ccccceeees 13 3 3 Operation for Zero Adjustment 14 4 F NCHONS eria 16 4 1 Setup and Checking of Functions 16 4 2 Description of Functions 17 4 3 Interface Section ccceees 18 5 Switching Function for Unit of Measurement 19 5 1 Switching Units of Measurement 19 5 2 Setup of Units of Measurement 19 6 Counting Pieces ccee 21 6t Sampling cae ne se te 21 6 2 Increasing the Counting Accuracy Memory Update Method 23 7 Measuring Percentage AJ NT only 24 8 Limit Function 00 26 8 1 Limit Function Setup 26 8 2 Setup of Limit Values by Actual Quantity Loads ccccceeeeeees 28 8 3 Setting up Limit Values by Inputting Values eeeeee ees 29 9 Input output functions 31 9 1 Terminal Numbers and Functions 31 9 2 Connection between Balances and Personal Computer s 0008 32 9 3 Interface Specifications 008 33 OA OUP DA tats t get ella ke 34 9 5 Input COMMANAS cccceeeeeeeeeees 36 10 Opera2. 8 The measurement mode that is activated when the balance is switched on will be the one that was active when last switched off For example if the balance was switched off in counting mode this counting mode will be reactivated the next time the balance is switched on 4 Functions 4 1 Setup and Checking of Functions 1 Invoking the function Press and hold down the key until the indicator changes to Func then release 2000 ae the key The function setup mode is OOO activated and the first item 1 b G 1 Bar graph 1 appears See 4 2 Description of Functions on page 17 Selecting the next item Press the key The indication changes to the next item 2 SEL O Limit function Selecting an item Pressing the key advances the function items at the rate of one item per press Select the item to be changed with the key Each press of the key changes the digit on the right end Select the desired one Press the key The balance terminates the function setup and returns to measurement mode 4 2 Description of Functions Set Value Bar graph display b G Disable Enable z Limit function 2 2 8L Disable Enable Always judge judges even when the balance is unstable 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 22 Li not judged The entire r
3. gt Grav ity gt Calibration Hum idity Drafts Electromagne tic Waves Meas urement Errors Static Electricity Absorption Vibration Evaporation Shaking of Moisture Magn etism Magn etism Meas uring B ench Factor Analysis Chart for Meas urement Errors Static Electricity Tem perat ure 1 2 1 Precautions on the Measuring Room Temperature Try to maintain constant room temperature as much as possible to Humidity prevent dew condensation and unstable indications due to fluctuations in temperature Low relative humidity tends to induce static electricity causing measurement error Relative humidity of about 60 is considered ideal Vibration The measuring room should preferably be located on the ground Shaking floor or in the basement Higher floors are more susceptible to heavy vibration and shaking which make such locations less suitable for measurement A room facing a railway or road with heavy traffic should also be avoided as much as practicable Drafts Avoid choosing a location subject to a direct draft of airflow from an air conditioning unit or exposed to direct sunlight which may cause unstable reading due to abrupt fluctuations in temperature Also avoid a room subject to a heavy flow of people since fluctuations in drafts and temperature are likely to occur in such a location Gravity The gravity acting on a sample varies depending on the latitude or he
4. The bar graph shows the current load status with respect to the Zero Capacity capacity of the balance The nearer the F mark draws the smaller point point the measurable weight becomes Even when the display currently indicates zero with the weight OurtnlnnenlennnliniF subtracted the weight corresponding to the gross value is indicated on the bar Half 1 2 capacity 3 When the balance remains stable the stability indicator O remains on Ifthe balance becomes unstable the stability indicator O will disappear When a displayed value flickers or the stability mark flashes on and off it is likely that the balance is being affected by wind or other vibrations Use the windshield or vibration dampers to protect against such adverse effects Unstable Stable 4 When the read out indicator is reset to zero the balance indicates zero this way gt 0 lt Orr E 0 O I l F Hees Ao Ge If the indication If the tare is deviates from the subtracted the true zero point by balance indicates 1 4 of a graduation zero or less gt 0 lt disappears 5 Only weight fraction that was canceled the measurable range is reduced Measurable Range Capacity container weight 6 If o Err appears when a sample is loaded the measurable range has been exceeded 7 In counting mode if no sample is stored in memory the indicator will not change even when the measurement pan is pressed
5. it stabilizes next time including the zero indication 37H Pressing key causes the balance to output once when stable 4FH 39H Output once after stabilization XThe output controls executed with commands O0 O7 work the same as the output controls executed through function setup on the main unit of the balance The commands O9 are data request commands issued to the balance XOnce any command from O0 to O9 is executed the balance runs that function until another command is entered However if the balance is switched off and on again the output control is reset to the initial function function set value 4FH 32H 4FH 34H 9 5 3 Response Output 1 Response output format Composed of five characters including the terminators CR ODH LF OAH 1 2 3 4 5 A1 A2 A3 CR LF 2 Types of response outputs At A2 AB Code Description 41H _ 30H 30H E 0 A5 20H 31H Command error Abnormal command received other errors 37 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 lt While the balance is battery operated E A stays on The indicator displays Lo bAt and flashes __4
6. 38 or 39 It does not show when powered by AC adaptor 2 2 2 Names and Functions of Operating Keys Operating Key On off key Memory key Function key Zero key Key to turn on off the unit power Brief press initiates print or output Brief press saves the settings of the number of pieces or the limit value when using the limit function Brief press starts setting the number of pieces or percentages Continuous press starts setting the limit value when using the limit function Brief press toggle switches the units to be displayed in succession g Pcs etc Brief press moves the flashing digit in the setup of a limit value when using the value input method Brief press selects an item when setting the function Continuous press invokes various functions Longer continuous press invokes span adjustment Brief press resets the indication to zero when using zero point setup Brief press selects a value with the value input method when using the limit function Brief press selects a function when operating the balance in the function mode 3 Basic Operations 3 1 Installation 1 Positioning the measurement pan 11 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 1 Set a small panel in a large panel An edge with step should fa
7. a normal end response or transmits the requested data via the transmitting command If the balance was unable to execute the command or received an erroneous command it transmits an error end response If the balance is working properly it usually returns a response within a second after it receives the transmitted command If the balance receives a transmission while it is conducting a procedure such as the setup of a function or a span adjustment it will transmit a response when the procedure finishes 3 When transmitting more than one command to the balance from a remote device wait until you have received a confirmation on the first transmission before transmitting the next 36 9 5 2 Command format 1 Command format Composed of four characters ASCII including the terminators CR 0DH LF OAH 1 2 3 4 Ci Ji 262 CR LF 2 Instruction for zero adjustment Response T SP 54H 20H Instruction for E01 Zero adjustment cannot be zero adjustment executed due to an error in the weight value 3 Setup of output control C1 C2 Description O0 4FH 30H Stop output 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 Outputs once if stable and stops output when unstable Even if the sample is not replaced the balance is output once when
8. breakage burst batteries or fire 1 Do not disassemble or modify the battery Do not reverse the balance connection or short circuit the positive and negative polarities of the balance 2 Use only the supplied AC adaptor 3 Do not incinerate used batteries Dispose as hazardous material only 38 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 e Cell type for use 9 Volt 006P alkali type recommended e Drive time Approximately 20 continuous hours Xdepend on model storage and operation condition 11 2 User Precautions 1 While the balance is battery operated IIFA stays on The indicator displays Lo bAt and flashes __4 when battery capacity decreases If the balance flashes _4 change the battery at an early stage 2 The balance can be operated with AC adaptor while the dry cell battery is installed qm does not show in this case 3 Operable hour will be shorten when 7 I F 12 is selected because some power is consumed for interface even with no output AN Cautions To operate the balance safely observe the following failure to do so could result in malfunctions breakage burst batteries or fire 1 Do not disassemble or modify the battery Do not reverse the balance connection or short circuit the positive and negative polarities of the balance 2 Use only the suppl
9. charging required when battery capacity decreases If the balance flashes _4 charge the battery by following these steps 1 Connect the dedicated AC adaptor to the balance 2 Turn the balance off 3 Charging takes approximately 12 hours with power switched off Charging the battery longer than 12 hours decreases battery life 10 3 User Precautions 1 Once charging is complete use the balance without the AC adaptor to avoid over charging This can occur since the balance continues to charge the battery with a weak current when the power is switched on Overcharging will also decrease battery life 2 When the balance is used for the first time after purchase the operating time may be shorter than when using a fully charged battery This is due to natural discharge of the battery Although the balance can be used while __ Al is flashing it should be recharged as soon as possible 3 When the battery displays no indication or an indication disappears quickly after the balance is switched on battery capacity is low In these cases either charge the battery immediately or plug in the AC adaptor 4 Charging the battery while BA is displayed reduces battery life 5 Operable hour will be shorten when 7 I F 1 2 is selected because some power is consumed for interface even with no output Cautions To operate the balance safely observe the following failure to do so could result in malfunctions
10. indicated The balance is shipped from the factory with the following switching sequence g ct Pcs gt g ESY Press the measurement pan lightly and make sure that the read out indicator changes Also ensure that the read out indicator is reset to zero when you release your hand 3 3 Operation for Zero Adjustment 1 Place the container on the balance As you place the container the balance indicates its weight Press the key The container is subtracted and the balance indicates zero The balance will now indicate only the weight of the sample loaded in the container Press the key The total weight of the sample loaded on the measurement pan is indicated as zero The balance indicates only the weight of an added sample When the weight of a sample currently loaded on the measurement pan is reset to zero with the key as mentioned above only the weight of the sample will be measured x Key Points of the Procedure xx The following applies equally to all the measurement modes for weight measurement counting and percentages 1 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 XIf the balance is running on batteries and the unit is switched off the display does not display 2
11. 200046M11 High Precision Tuning Fork Electronic Balance AJ NT DBNT Series Operation Manual IMPORTANT e To ensure safe and proper use of the balance please read this manual carefully e After reading this manual store it in a safe place near the balance so you can review it as needed ViBRA SHINKO DENSHI CO LTD PREFACE Thank you for purchasing an AJ Series electronic balance This is a precision instrument equipped with exacting mechanisms in a compact body The Ad series provides enhanced functions including a counting mode for stock control of parts and a limit function for measuring constant quantities by consecutive weighings Despite its many functions the balance is easy to operate and features user friendly keys Furthermore the large liquid crystal display provides excellent visibility and the instrument s high speed and stability intrinsic to a tuning fork design help boost operational efficiency Before using the balance please check that the following items have been included in the package Should you find any missing parts please contact our local dealer 1 Main unit of balance 2 Measurement pan One round or square pan 3 Pan base 4 Windshield 5 AC adapter one One small for the round pan one for round pan balance one large for the balance only Square pan balance VY JZ 7 Operation manual one CONTENTS 1 Precautions on the Use
12. 37 2267 96185 16 qo 14 58333 291 66667 7000 tozt 81 10348 155 51738 1 09714 0 06857 fQ 0 ooo 480 tdwt 1 55517 7 77587 0 05486 0 00343 0 05 Moo 24 1GN 0 06480 0 32399 0 00229 0 00014 0 00208 0 04167 1 44
13. D1 to D9 D1 D7 D8 09 30H39 Numerical value 0 9 Decimal point floating position 2EH XWhen the data is an integer it may be omitted and replaced with a blank space SP in the lowest order place Ooa Space zero of leading portion of value leading zero suppress J oFH Delimiter to be inserted to the left of the auxiliary scale interval place 9 4 4 Units U1 U2 two characters X All the codes are ASCII codes rep ana gen ee eh a ooo oS ACH 42H pound eC 44H 57H Cam n grain ori ON C E e e KCN e 2s percentage 35 9 4 5 Result of judgment when operating the balance with the limit function S1 one character LO LOW OK GOOD HI HIGH SP No limit value specified 9 4 6 Status S2 one character Data stable Data unstable Data error data other than S2 is invalid E 45H o Err u Err SP No status specified 9 5 Input Commands Users can control the balance remotely by transmitting commands from an external device Two types of control commands are available 1 Instruction for zero adjustment 2 Setup of output control 9 5 1 Command Transmission Method 1 Acommand is transmitted to the balance from an external device Since the data flow transmission and reception is stored by a full duplex system commands can be transmitted regardless of their data transmission timing 2 When the balance has executed the received command it activates
14. Press the key The display changes to Judgement Range Press the key to select the desired choice Press the key The display changes to Judgement Points Press the key to select the desired choice Press the key The balance terminates the function setup and returns you to measurement mode 8 2 Setup of Limit Values by Actual Quantity Loads 1 Starting the limit function Press and hold down the key Release the key when L SEt is displayed nE Oey The currently set lower limit value flashes Continuous pressing Load the sample of the lower limit value on the measurement pan Press the key After the lower limit value has been saved the balance displays it briefly and proceeds to the following setup If One point setup was chosen the setup is complete 4 The upper limit value The display now changes to setup H SEt indicating that the upper limit value can be set The currently set upper limit value flashes Load the sample of the upper limit value on the measurement pan Press the key After saving the upper limit value the balance displays it briefly and terminates the setup 28 8 3 Setting up Limit Values by Inputting Values 1 Starting the limit function GPSS P ese L OO OE Continuous pressing Key released 2 Opening the value input screen Entering a value Selecting a digit Repeat Steps 3 and 4 Saving the lower limit value 29 Press
15. amples has been saved the display begins to flash indicating that the Memory Update Method is still running Repeat steps 3 and 4 The eventual total number of samples to be saved should be approximately 1 5 to 1 2 of the number of samples to be measured Terminating the sampling Press the key 125 pieces saved The balance saves the unit weight and returns you to measurement mode 23 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 itas 100 Whena 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 1 Activating the percentage mode Press the key to disaplay Press the key The display begins flashing P SEt The balance is now ready for reference value setup Load the reference sample Press the key The balance indexes the weight value of the reference sample as 100 and returns you to measurement mode The balance now indicates the weight of the loaded sample as a percentage value relative to the reference value 24 x Key Points of the Procedure 1 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 proces
16. and hold down the key Release the key when L SEt is displayed The currently set lower limit value flashes Press the key All the digits are displayed with the one on the right end flashing This flashing digit is the one that can be changed Press the key again Pressing the key repeatedly changes the flashing value until the desired number is entered Press the key The flashing moves to the digit on the immediate left Each time the key is pressed the flashing digit moves one position left When the leftmost digit is selected the flashing advances to the rightmost digit position Enter the lower limit value by selecting a value with the key and moving the digits with the key as needed Press the key After saving the lower limit value the balance displays it briefly and proceeds to the next setup XIf one point setup was chosen the setup is complete The display changes to H SEt indicating that the upper limit value can be set If there is an upper limit value already set that value will flash 8 3 Setting up Limit Values by Inputting Values cont 8 Opening the value input screen Press the key Follow the same procedure as in Step 2 Follow the same procedure as described for the lower limit value and enter the upper limit value Press the key After saving the upper limit value the balance displays it briefly and terminates setup x Key Points of the Pro
17. ange is judged the entire range including the negative is judged Number of One point setup judges between OK and LO points for 23 Pi Upper limit and lower limit values are set up judges Judgement condition 21 Co Judgement range ia E c2 FE z5 gt O co 5 S D 2 O Oe a3 Q judgement among HI OK and LO Disable balance operates This function is continuously available only when Auto power off 4 A P Enable balance powers off the balance is in approximately three battery operated minutes Measurement by consecutive weighings Response speed i e Slow Disable input output Interface Ta LEF Six digit numeric format Seven digit numeric format Setup of units of measurement tobe sierra ec rrr displayed SU Pa ee eae Ol eee Register selected et a aa ch a Sa Di measuring units with ____ Y JLZ LOWE TQM Yran 222222222222 key 0 re Pes laaan Unit not set Items mrked gt are the default factory settings x1 x5 default factory settings 81 S u 85 S u x6 AJ NTDB Type only X1 For 220g 6200g Capacity model 4 3 Interface Section Displayed when 7 I F 1i is set to 1 or 2 Set Value 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 Outputs once if stable and st
18. ay be subjected to excess moisture e Electric shock or short circuiting could occur e The balance may be corroded with resultant malfunction Do not use the balance with its adjusters lifted e The balance will become unstable preventing accurate measurement Do not use the balance in a location where it may be subjected to excess dust e Risk of explosion or fire e Short circuit or lack of continuity may occur leading to a malfunction of the balance Avoid applying excess force or impact to the balance Place the sample to be measured on the balance carefully to prevent breakage or malfunction Do not use the balance in a location were it may be subjected to abrupt changes in ambient temperature or humidity e Accurate measurement may not be obtained e Optimum operations occur when ambient Do Not Use Do Not Use Do Not Use 0 Check Level Do not use the balance when o Err Overloaded is displayed e Take down the loaded sample immediately to prevent breakage or malfunction Do not use the balance in a location where it is subject to direct sunlight e The indications would be illegible e An internal temperature increase in the balance may lead to inaccurate measurement If the balance is to be unused for an extended period of time unplug the adapter e This conserves power and prevents deterioration Do not use volatile solvents for cleaning e The body ma
19. ayed Press the Function key several more times until 82 S u 14 appears Press the key several times to specify 82 S u 16 Example To change the default factory settings to pound units use 82 S u cont 3 Pressing the Set key to restore measurement mode Pressing the key will reset the measurement mode 4 Pressing the Function key to change the units of Press the key measurement Each press of the key changes the units Po 8 of measurement to be displayed as follows g gt lb gt Pcs gt g gt Go Pos if fl SOF Se x Key Points of the Procedure xx 1 When set values are entered in the function items 81 S u to 85 S u prior to use the desired unit of measurement to be displayed can be selected simply pressing the key For more information on the units of measurement that can be set please refer to 4 2 Description of Functions on page 17 2 The units are displayed in the same sequence as the settings made from 81 S u to 85 S u 3 If 00 is set no unit of measurement will be displayed even when units of measurement are set In subsequent items 4 00 cannot be set in 81 S u 5 Ifthe same unit of measurement is set multiple times the second time and all subsequent times the unit s occurs it will be ignored when the display switches 20 6 Counting Pieces To implement piece counting the specified samples are loaded on the ba
20. balance users can select either of the following formats See 4 2 Description of Functions on page 17 9 4 1 Data Format 1 Six digit numeric format Composed of 14 characters including the terminators CR ODH LF OAH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 U1 U2 S4 S2 CR LF 2 Seven digit numeric format Composed of 15 characters including the terminators CR ODH LF OAH A parity bit can also be appended 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 3 Six digit numeric format for model provided with an auxiliary scale interval Composed of 15 characters including the terminators CR 0DH LF 0AH with added to the left of the auxiliary scale interval place 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 4 Seven digit numeric format for model provided with an auxiliary scale interval Composed of 16 characters including the terminators CR 0DH LF 0AH with added to the left of the auxiliary scale interval place 9 4 2 Polarities P1 one character When data is zero or positive po DH When data is negative SP When data is zero or positive 34 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
21. bjects made of synthetic resin and glass has high Electricity electric insulating properties and therefore are apt to be electrically charged Measuring a charged sample as is may cause unstable indications with resultant poor reproducibility of the results With this in mind be sure to discharge charged samples before measurement Magnetism A sample affected by magnetism indicates different weight values depending on where it is located on the measuring pan along with resultant poor reproducibility of the results When a magnetized sample must be measured first demagnetize it or place an appropriate pedestal on the measuring pan to adequately separate the mechanism part of the balance from the magnetized sample for avoiding the effects of magnetism Absorption Measuring a sample with moisture absorbed or evaporated volatized Evaporation continuously increases or decreases the values indicated In such case of Moisture measure the sample in a container with a small opening and sealed airtight with a cap Sample A difference in temperature between a sample and the interior of a Temperature windshield may cause convection to occur inside the windshield resulting in erroneous measurement Therefore measure a very hot or cold sample only after allowing time for its temperature to acclimatize to room temperature Moreover to prevent convection inside the windshield allow time for the interior of the windshield to acclimatize to room
22. ce the same side 2 Set the other large panel in the assembly above 3 Set the other small panel in the assembly above 3 Puton the windshield Position of air bubble in the level 12 Put the cover on top and place the complete assembly along the guide Turn the adjusters until the bubble rests in the center of the red circle on the level Round pan type total of two adjusters one on either side at front Square pan type total of four adjusters one on either side at front and rear lt Caution gt Use caution when operating the adjusters on the square pan type to prevent them from lifting up Connect the AC adapter to the balance as illustrated at left Take 5 minutes before operation lt Caution gt If the balance has the battery installed refer to 10 Operating the Balance with the Battery 3 2 Operation Check 1 Turning on the power 2 Checking the display 4k gt e Oumar A CAL Pog annonam si bo00o000 t 3 Switching the measurement mode DI I oo oe Gag ct SRE When the balance has the AC adapter connected it displays Pressing the On Off key The display section lights up and the balance is ready for operation Check to see if the display has any missing indications or unlit parts A few seconds after startup the indication is reset to zero Press the key Each time the key is pressed the unit of measurement changes as
23. cedure 1 The limit values you have set can be checked each time you press the key The balance displays the lower limit value after showing L SEt and the upper limit value after showing H SEt Upper limit value Lower limit value Measurement mode displayed displayed restored 2 Ifyou make a mistake press the key during the setup of actual quantities or the key during the setup of values 3 If you press the key while a value is flashing an actual quantity will be set based on the weight currently loaded on the balance Pressing the key at this time displays the value input screen 4 If the lt mark lights up for all three judgement indicators HI OK and LO the lower limit value set exceeds the upper limit value Check the values since mistakes can occur with entries as in cases when the upper limit value is specified with a negative sign 5 When the M mark is flashing on the value input screen the sign on the left end can be changed Press the key to switch between the positive and negative signs 30 9 Input output functions 9 1 Terminal Numbers and Functions Pt eneo input__ Eemal Zero adjustment 2 Dr Oupu HIGH when balance is powered up O 3 O RXD int Recesivingdata 4 a ____Traneenling dee ee Signal ground 3 RS232C connector DIN 5 pin female Rear Zero adjustment is possible by connecting an external zero adjustment input and a signal ground through co
24. ch symbol is accompanied by an instruction Indicates a mandatory action that should be executed without fail Mandatory Check Level Symbol Indicates a prohibited action that must not be S executed Prohibitive Do not Use Symbol Do not disassemble or modify the unit e Could cause malfunction or heat generation Do Not Disassemble Only AC power rated value should be used Only use the dedicated AC adapter e Contact our local dealer e Use of other types of power or adapters may Do Not result in heat generation or malfunction of the Deviate from balance Ratings z Do not move the balance when a sample is loaded ALN e The loaded sample may fall off the measurement pan and cause an injury Do Not Move p Jury Do Not Use 9 Do Not Drop O Do not Handle with Wet Hands Do Not Leave Afloat Avoid Dust Do Not Apply Force Do Not Use Do not place the balance on an unstable base or use the balance in a location where it may be subjected to shock e The loaded sample may fall off the measurement pan e Accurate measurement may be rendered impossible Do not lay the AC adapter cable on the surface of the passage e Somebody may trip on the cable causing the balance to fall off thereby causing injury and or damage to the balance Do not touch the AC adapter or balance with wet hands e Danger of electric shock Do not use the balance in a location were it m
25. e A section of the mechanism is damaged Contact our local dealer e A foreign object is caught between the Remove the measurement u Err is displayed measuring pan pan base and the balance pan and examine the e A section of the mechanism is damaged surface beneath it e The balance is exposed to static Contact our local dealer b Err is displayed electricity or noise d Err is displayed e The electrical system of the balance is malfunctioning During battery e The automatic power off function was Switch on the power installation activated again Deactivate the The indication e The battery capacity is low AJ NT Automatic power off disappears e The dry cel battery capacity is function if necessary 17 Lo bAt is display low AJ DBNT gt Recharge the battery _4 flashes 38 AJ NT No indication is Replace the dry cell produced battery 39 AJ DBNT Operate the balance with the AC adapter 40 13 1 AJ 220NT DBNT Accuracy class 13 Specifications 320g 0 02g 0 01g 0 001g class I Basic Specifications AJ 420NT DBNT class I AJ 1200NT DBNT 1200g 0 5g 0 1g 0 01g class I Measurable unit weight in counting mode Minimum weight in percentage mode Weight measuring Tuning fork vibration method method Compliant with RS232C Battery drive Only AJ NT AJ AJ AJ 3200NT 4200NT 6200NT DBNT DBNT DBNT 3200g 6200g 0 5g 1g 0 1g 0 1
26. e of accuracy is desired it is recommended that users change the sampling number to a larger value Press the key Each press of the key changes the value on the right end Select the desired value If the sampling number need not be changed go on to the next step Load the number of samples displayed Count the samples precisely and load them in the center of the measurement pan How to change the value Press the key The balance saves the unit weight and reverts to measurement mode x Key Points of the Procedure xx 1 While the samples are being saved the value indication disappears and only M flashes to indicate that memory saving is underway If the balance is affected by wind or other vibrations during this process the saving time may be prolonged 2 If L Err appears it indicates one of the following states 1 The weight of one sample measurable unit weight is insufficient For the range of unit weights that can be measured and saved please refer to 13 Specifications on page 41 2 Inthe sampling of Operation Step 3 press the key with the samples loaded on the balance X If L Err appears the sampling is interrupted and the data in progress is not saved 3 The operation for increasing counting accuracy is referred to as the Memory Update Method This procedure updates the memory with a unit weight that represents a more precise average by gradually increasing the sampling number Th
27. g 0 01g class I 8200NT DBNT 2200NT DBNT Measurable unit weight in counting mode Minimum weight in percentage mode Weight measuring method Battery drive Only AJ NT Tuning fork vibration method 41 13 2 Common Specifications 1 Zero adjustment range cccccecseeeeeeeeeeeees Total capacity 2 Liquid crystal display LCD cceeeeeee Seven segments two segments in leading part Maximum digits indication seven digits Segment height 16 5 mm 3 Overload indication cccccccceeceeeeeeeeeeeeees o Err is displayed if weight capacity 9 intervals are exceeded 4 Compatible printer 0 0 0 0 cceeeeeeeeeeeeeees CSP 160 5 Operating temperature and humidity ranges 10 C to 30 C 80 RH or less for class I 12 5 C to 27 5 C 80 RH or less for class I 6 AG ada pier seian Dedicated AC adapter 120 VAC 9V DC 7 Lower limit of battery voltage ceeee 6V AJ 1200NT DBNT 0 92 13 0 0001 0 0001 0 00001 0 00001 42 AJ AJ AJ AJ AJ 2200NT 3200NT 4200NT 6200NT 8200NT measurement displayed DBNT DBNT Bottom line Auxiliary scale interval 43 14 Conversion Table of Units unit gram carat ounce pound troy ounce penny grain weight is Moo 5 0 03527 0 00220 0 03215 0 64301 15 43236 i bz ea a Aoo o 00705 0 00044 0 00643 o 12860 3 08647 toz 28 34952 141 74762 1 0 06250 0 91146 18 22917 437 5 tlb 453 592
28. ied AC adaptor 3 Do not put batteries into fire 39 12 Troubleshooting X The numbers in _ indicate reference pages Symptom Possible remediation Hinati e The AC adapter is not connected Check that the AC ae e a adapter is connected ies 12 e The balance is subject to air currents or Check Precautions on vibration the Use 2 The display is unstable e The balance is situated on an unstable M remains flashing surface without changing e An object is contacting the sample being measured the measuring pan or the container e An error was made in the zero adjustment gt Review the zero procedure adjustment 14 e The adjusters remain lifted resulting in an Check the level 12 Weight indication incorrect level contains an error e The indication values are inconsistent after long hours of use or because the balance has been moved to a new location ane e The limit function is not selected Check the operation of ee aoe We The limit value has been erroneously the limit function 26 on l entered Hdd appears lt q and e Likely to produce errors in the counting Execute the Memory a value flash at LO mode because the sample weight is Update Method 23 insufficient e Gross weight exceeded the capacity of Check the total weight o Err appears before the balance weight range container Execute zero adjustment the capacity is reached weight of sample again
29. ight of the location where measurement is being conducted For this reason the same sample may show different weight indications from one place to another Therefore make it a rule to calibrate the balance every time it is relocated Electromagnetic When the balance is located near an object that generates intense Waves electromagnetic waves it may be hindered from showing accurate weight due to the effects of such waves Therefore avoid placing the balance in such a location 1 2 2 Precautions on the Measuring Bench Vibration If the balance is subjected to vibration during measurement its indications will Shaking become unstable thus preventing accurate measurement from being conducted To avoid this situation select a solid measuring bench that is less susceptible to vibration A bench in a vibration proof structure or one made of concrete or stonework will be suitable Moreover do not conduct measurement with a soft cloth or paper placed under the balance since the balance may be rocked out of its precise level positioning Place the measuring bench in a location free from vibration as much as possible It is a good idea to install the measuring bench in a corner of the measuring room where less vibration is likely to occur than in the center of the room Magnetism Avoid operating the balance on a bench that is susceptible to the effects of Static magnetism or static electricity Electricity Static Generally speaking o
30. is operation improves counting accuracy and is recommended for the following cases 1 When the samples to be counted deviate widely in weight or the number of samples displayed deviates 2 When greater accuracy is desired 4 If Add appears in Memory Update Method it indicates that a counting error is likely due to the small number of the samples loaded on the balance will light up at the judgment indication LO As the memory update continues counting accuracy improves and the above indication disappears 5 If you change the sampling number subsequent sampling will start from the new sampling number 22 6 2 Increasing the Counting Accuracy Memory Update Method XThis procedure is the same as the sampling procedure described on the previous page up to the point at which the sampling number is changed 1 Loading samples Load the number of samples displayed Count the samples precisely and load them on to the center of the measurement pan Press the key The unit weight of the samples is saved and the display changes to a flashing value This flashing value denotes that the Memory Update Method is currently active Add approximately an equal number of samples as the number currently displayed Add them gradually in groups of approximately the same number until the number of samples is approximately double The additional samples need not be counted Press the key After the unit weight of the s
31. lance 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 Piece counting cannot be implemented unless sampling has already taken place Sampling Counting Pieces Weight 10 g Total weight 500 g en E a E E 500 pcs Number of samples 10 pieces Sample unit weight 1g Sample Measured unit weight number of samples XIf samples to be counted deviate widely in weight or a higher measure of accuracy is desired it is recommended that users use the Raising the Counting Accuracy method This procedure results in greater precision by increasing the number of samples used in the sampling operation 6 1 Sampling 1 Activating the counting mode Press the key to display Pcs Place the container and press the key The container is subtracted and the balance now indicates zero Press the key The display flashes a number such as on 10 This means that ten samples are to be loaded The sampling number that was used in the previous sampling will be displayed here 21 4 Changing the sampling number if necessary If samples to be counted widely deviate in weight or a higher measur
32. ntacts or a transistor switch When following this procedure secure a connection time of at least 400 milliseconds When the switch is off the voltage maximum is 15 V when the switch is on the sink current is 20 mA or less Caution Before plugging in the connectors unplug the AC adapter 31 9 2 Connection between Balances and Personal Computers EEE Sample connection with an IBM PC AT compatible E m m IBM PC AT compatible Balance D SUB9P DIN5P TXD 3 RXD 2 lt GND 5 DCD 1 RTS T A CTS 8 E DSR 6 lt DTR 4 Sample connection with PC9801 E m m PC9801 Balance D SUB25P DIN5P TXD 3 RXD A GND 5 DCD RTS CTS DSR DTR 32 RXD TXD GND 9 3 Interface Specifications 1 Transmission system Serial transmission with start stop synchronization 2 Transmission rates 1200 2400 4800 9600 bps 3 Transmission codes ASCII codes 8 bit 4 Signal levels Compliant with EIA RS 232C HIGH level Data logic 0 5 to 15 V LOW level Data logic 1 5 to 15 V 5 One character bit configuration Start bit 1 bit Data bit 8 bits Parity bit 0 1 bits Stop bit 2 bits 6 Parity bit none odd even _LSB_ MSB 229 G6 09 8 9 0 0 s Data bit T ee Start bit Parity bit may be omitted Logic 1 Logic 0 Stop bit 33 9 4 Output Data By changing the function settings on the main unit of the
33. ops output when unstable Even if the sample is not replaced the balance is output once when it stabilizes next time including the zero indication Pressing key causes the balance to output once when stable 1200 bps 2400 bps Baud Rate 72 b L 4800 bps 9600 bps Output Control PA PA Displayed only when 7 I F 2 7 digit numeric format is specified ooy x denotes a factory co 5 Switching Function for Units of Measurement 5 1 Switching Units of Measurement Pressing the key allows the user to switch the unit of measurement to g ct and so on Switching the units of measurement to be displayed rey Pcs Press the key Each press advances through the units of measurement to be displayed The balance is shipped from the factory with the following default setup g ct Pcs gt g 5 2 Setup of Units of Measurement When values 81 S u to 85 S u are entered prior to use the desired unit of measurement to be displayed can be chosen simply by pressing the key For more information on the units of measurement that can be set here please refer to 4 2 Description of Functions on page 17 Example To change the default factory settings to pound units use 82 S u 1 Display the function item 82 S u 14 Press and hold down the key Release the key as Func appears on the display The function setup mode is now activated and the first item is displ
34. s the saving time may be prolonged If L Err appears briefly it indicates one of the following states 1 The weight of the reference sample is insufficient For the limit weight that can be saved limit weight please refer to 13 Specifications on page 41 2 While setting up the reference value in Step 2 the key has been pressed while the samples were loaded on the balance If L Err appears sampling has been interrupted and the sample value being processed will not be saved The minimum intervals between percentages in the unit switch from 1 to 0 1 to 0 01 depending on the reference weight from the sampling 25 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 lt 4 mark as either HI excessive OK appropriate or LO insufficient This function is very useful when discriminating between conforming and nonconforming articles Itis also useful when measuring a given constant quantity consecutively in conjunction with a range of reference weights defined by upper and lower limit values This function can be used in weight mode counting mode or percentage mode Limit value input methods Either of the following two methods can be used in the different modes 1 Actual quantity setup method An actual sample is loaded on the balance and its weight saved as the limit val
35. ssure Maintenance When the measuring pan or pan base is contaminated with powder or liquid erroneous weight values may result or indications may remain unstable Therefore be sure to frequently clean the balance When cleaning the balance be very careful not to allow dirt or liquid to penetrate inside the mechanism part 2 Names of Component Parts 2 1 Main Unit Capacity g Pan type Front View round pan type Windshield Supplied only with the round pan types The top lid is detachable Level For checking the level of the Dry Cell Box balance pent Turn the adjusters until the bubble rests Liquid crystal in the center of th eral ee a eee Operation keys display LCD See page 10 See page 9 Rear view Measurement pan RS232C connector Adjusters AC adapt adapter Round pan type Total of two one on either connector side of the unit s front Square pan type Total of four one on either side at front and rear Square pan type 2 2 LCD Indicators and Operating Keys 2 2 1 Symbols Displayed HI q k 0 OnrrolannilonnnlhnnF AA CAL Pes KIN OOO OD we SSBB BAGH t Display Description Grams Zero point Auxiliary scale interval Lights up only when the auxiliary scale interval is displayed Olli F Bar graph It stays on A when operated by rechargeable battery or dry cell battery It flashes __4 when the battery capacity becomes low Refer to page
36. temperature The body heat of a person conducting measurement can also affect measurement results Avoid holding the sample with bare hands and use long tweezers or a similar tool instead Also refrain from putting your hands inside the windshield while measurement is in progress 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 Otherwise simply operate the balance with the dust cover removed For more stable measurement it is recommended to have 30 minutes warm up time after power up and apply a load equivalent to the weighing capacity several times before conducting actual measurement operation Calibration Periodically calibrate the balance with an internal or external calibration weight to ensure accurate measurement at all times For more precise calibration use an external calibration weight that approximates the weighing capacity Moreover calibrate the balance only after enough warm up time and loading near capacity weight Calibration is also required in the following cases When operating the balance for the first time When not using the balance for a long time When relocating the balance or When there is wide fluctuation in temperature humidity or atmospheric pre
37. ting the Balance with the Battery 38 10 1 Specifications cccccceeeeseeeeeee eens 38 10 2 Charging Method ccccseeeeeeeees 38 10 3 User Precautions 38 11 Operating the Balance with the Dry Cell Battery DBNT 39 12 Troubleshooting ccccccceee 40 13 Specifications eee 41 13 1 Basic Specifications ccceeeeeee 41 13 2 Common Specifications 0 42 13 3 Capacities and Minimum Indications for Different Indication Units 43 14 Conversion Table of Units 44 1 Precautions on the Use 1 1 Warnings regarding Use e 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 and Recommended and explained using symbols This symbol indicates a risk of injury or property damage if the CAUTION balance is used improperly Be sure to observe these notes to ensure safe use of the balance as the improper use may cause serious results RECOMMENDED This term indicates steps that the user should take to ensure the quality and reliability of the balance Meanings of Symbols Ea
38. ue 2 Numeric value setup method The limit value is entered with a key stroke lt The limit values entered are held in memory even when the balance is powered down XThe respective limit values for weight mode counting mode and percentage mode are set up independently Indication of judgement result The lt 4 mark lights up as either HI OK or LO on the left side of the display indicating the result of judgement Judgement Results Upper lower limit setting One point setting Upper limit value lt measurement he Mian tas HI excessive ie No indication Upper limit value gt measurement TE OK appropriate PP eas Limit value lt measurement value value gt lower limit value 0 Lower limit value gt Measurement LO insufficient Jalie Limit value gt Measurement value 8 1 Limit Function Setup Invoking the function Press and hold down the key Release the key when Func is 7000 displayed The display changes to the function setup and the first item is displayed Key released 26 8 1 Limit Function Setup cont 2 Selecting a function item 3 Setting the limit function Limit function operations Judged at all times 27 Press the key The display changes to the next item Limit Function Press the key to set the value on the rightmost side to 1 Press the key The display changes to Judgement Condition Press the key to select the desired condition
39. y be distorted e Toclean the unit of stains use a piece of dry cloth or cloth soaked in a small quantity of neutral detergent Do not use the balance in a location where it may be subject to air from an air conditioning unit e Extreme changes in the ambient temperature may result in inaccurate measurements Do not use the balance on a soft floor e When loaded with a sample the balance may tip or move preventing accurate measurements from being conducted Do not use the balance when it is tilted An inclined balance is likely to produce errors preventing accurate measurements from being conducted Place the balance on a level surface 1 2 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 These factors can readily affect the results of measurement on a balance that has high resolution readability This material includes some precautionary notes that the user should bear in mind to eliminate error factors and ensure accurate measurement results Te mperat ure gt Vibration Shaking gt Mainten ance
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