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1. ZERO key performs the plus 1 function After the ZERO key is pressed the figure displayed in the last bit will be plus 1 automatic zero setting will be made after it is added to 9 N TARE key performs the shift function After the TARE key is pressed the figure shown in the last bit will move to the left for one bit and the last bit will be supplemented with 0 If the 6 bit indication or effective bit is exceeded after the movement of some one figure to the left the figure will be discarded U HOLD key performs input function Press the HOLD key to put the set data into indicator D CLEAR key performs exit function Press the CLEAR key to exit calibration or state setting UI Weighing Operation 1 ZERO Press ZERO key to enable the data within zero setting range of instrument to return to zero Zero setting can be performed only after the STABLE indication lights 2 TARE When the displayed weight in weighing state is positive and the STABLE light will on press the TARE key to deduct the indicated weight as the tare In this case the instrument will show a net weight of 0 and the NET WEIGHT lights will on Press the TARE key again when gross weight is 0 the instrument will clear the tare value 3 Magnification Press the FUNCTION key when tare value is 0 in weighing state the weighing accuracy will be 10 times larger and press the FUNCTION key again to return normal magnification of net w
2. after calibration Chapter V Error Indication Err 1 Err 2 Err 5 Err 7 Inner code loaded is too small or the capacity of load cell is too large Out of manual zero setting range Inner code loaded is too small or the capacity of load cell is too large The calibration short circuit ring did not connected 9 Out of display range A oL Out of the maximum times of accumulation or weigh of accumulation HHHHHH Zero position is too high or there is heavy object on weighing platform when the indicator is on Chapter VI Battery I The battery will be charged after power cord is connected to AC 220V power supply So please remove the battery if it is not used frequently In order to avoid internal over heat and battery over charging the current will be limited If you feel that charging is too slow please buy a special charger for external charging Please note that the wire ends connected to battery shall not be connected inversely red black or the indicator may burn out Be sure to fully charge the battery before using the built in battery for the first time II When the indicator is battery powered it will automatically switch to AC supply mode once the AC power supply is connected in this case the AC indicating lamp will light on There are battery level indications at the lower left corner of indicator screen The indicator will automatically cut off the DC power supply after the last indicati
3. input is same as the actual weight on to set the lowest last D so eee 3000 weighing scale you can directly press the HOLD key to move digit to 3 and press the to Step 13 TARE key to change the data to 3000 and then press the HOLD key to confirm 14 Baud rate setting display the original baud rate of indicator and guide the user to input new baud rate Baudos bt 1 0 600 1 1200 2 2400 3 4800 4 9600 Press the HOLD key to move to Step 14 15 A Zero tracking range 0 5 means 0 0 5e le 1 5e 2e and 2 5e B Manual zero setting range 0 5 0 2 4 10 20 100 100 SIINO n ABCD Operation in ZERO zone C Startup zero setting range 0 5 0 2 4 10 20 100 100 D Stability scope 1 5 the larger value the stronger stability of indicator The way to change input value is the same as above Press the HOLD key to move to Step 15 16 A Display the brightness Larger values indicate higher brightness 0 5 B Power saving mode 0 saving mode off 1 about 30 seconds 2 about 60 seconds 3 30 seconds 4 60 seconds Modes 3 and 4 are of strong power saving mode you Pepay dnde PREIAR can exit the power saving mode only by pressing the key The way to change input value is the same as above C Power status light refreshes time 0 5 seconds 1 30 seconds Press the HOLD key to move to Step 16 16 Calibration is complete Return to weighing mode Note unplug the short circuit ring
4. JP7 Note Please refer to the second section of the third chapter about the key operation before next operation II Calibration procedure Step Operation Display Description 1 pee Weighing mode a CR rn 5 P The password of calibration The password is 111 i i 0 a d Division setting display the original division parameter and RA guide the user to enter a new division parameter 4 Input a new division parameter e g 1 press The range of this parameter is 1 2 5 10 20 and 50 if the the ZERO key once to set d 1 division value parameter to be entered is the same with the the indicated data to 1 currently displayed value you can press the HOLD key to move and press the HOLD key to Step 4 to confirm 5 aP Decimal number setting display the original number of decimal and guide the user to enter a new number of decimal i Vi The parameter ranges from 0 to 3 0 means there is no ZERO key RD decimal and 1 3 means 1 3 decimal if the number of decimal toset the indicated dan as dP 3 to be entered is the same with that of the currently displayed 3 and press the HOLD decimal digit you can press HOLD key to move directly to Step key to confirm s3 7 Preto ii Full capacity setting display the original full capacity and when th guide the user to input a new full capacity SR If the value 3190 is input you can press the HOLD key to Fines return to weighing mode Resta
5. R A12 Weighing Indicator User Manual V1 01 Shanghai Yaohua Weighing System Co Ltd Table of Contents Chapter I Technical Datos edi ddr 2 Chapter II Installation Connec A an ie i 3 I Instrumentation Diagram ii 3 II Sensor Con ectic racco 3 II Serial dui catio i 2 rface and Large Scr lai Chapter III di soi AA PA PTN a EIA 5 l StartUp Sa ea NN Ba ici 5 KO PETA OR MR Leni ola nan 5 IMI Weighing Operation naat sei weal BB BS NN 6 Chapter IV Calibration Description i 8 Note unplug the short circuit ring after calibratio AS Chapter V Error Indication i 9 Chapter VI Balena ie dti 10 Dear users Please read the instruction manual carefully before using this indicator This indicator shall not be used for public trading Chapter I I Model R A12 Technical Data Sensor connection 3 Indication Signal I indicator Diagram If there is only 4 core shielded cable on site pins 1 amp 2 and 6 amp 7 can be shorted at the 9 pin sensor connector A The connections of sensor and instrument must be reliable and the shielded cable of sensor must be reliably grounded Connections lines shall not be plugged and pulled when the instrument is in a Power up State in order to prevent static electricity damaging the instrument or sensor A Since both sensor and instrument is static sensitive device anti static measu
6. alue e g 0 press the TARE key to change the value to 00000 Press the HOLD key to make confirmation and move to Step 6 6 Go back to weighing mode displaying net weight after tare Note cancel the upper and lower limit alarm operation when both the upper and the lower limit is 0 press the CLEAR key to cancel the setting at any time while setting the current setting data will not be saved however the data before the current step will be saved 10 Auto sleep function If the indicator is in a continuously steady state and there is no any key and measurement operations setting for 30 or 60 seconds as optional it will automatically enter into auto sleep state In this ic condition only last decimal light is on If there is any key operation in mode 1 or mode 2 the indicator will automatically exit the sleep state and get into normal work state only by pressing the keys in mode 3 or mode 4 can the instrument exit the sleep state See the table in Chapter IV for specific settings Chapter IV Calibration Description I Properly connect the signal source and power supply to preheat the indicator for 15 30 minutes when there is no load on weighing platform connect the calibration short circuit ring in normal weighing state while pressing the FUNCTION and CLEAR key at the same time the indicator will get into calibration state The position of calibration switch on circuit board is
7. eight cannot be shown and the data cannot be enlarged beyond the range of display 4 HOLD average value Press HOLD key in weighing state the PEAK VALUE light will on which indicates peak value If the current weight is less than 5 of full capacity it will return normal press the HOLD key again the AVERAGE VALUE light will on In this case when it becomes stable relatively the indicator will make automatic determination on whether it is stable the indicator will calculate the average value and show it after flashing The average value will be cancelled when the current weight returns to 0 and the next average value can then be measured press the HOLD key again the instrument will return to normal weighing mode In this case the HOLD key can be pressed to convert the mode 5 Manual accumulation of measured value Press the ACCUMULATION key when the measured value is larger or equal to 20 divisions and the data is stable in the normal weighing state the indicator will perform manual accumulation function In this case the indicator will indicate the total accumulation data in two steps total indicating that the content shown below is the amount of accumulation data will show the accumulation data in about 1 second The times of accumulation will be then indicated in two steps n indicating that the times is shown below will show the times of accumulation in about 1 second The ACCUMULATION indicati
8. hing state the indicator will perform switching between units when the measurement unit is lb the last digit behind decimal point of the shown data is on Note if one unit has been used for an accumulation operation and the accumulation results are not cleared in this case the accumulation light is on or flashes at low frequency the indicator will forbid switching between units which can be conducted only after the results are cleared The switching between units is forbidden when the tare is not 0 Preset tare and upper amp lower limits alarm Press the FUNCTION and TARE keys at the same time in normal weighing state the indicator will perform the preset tare function in the following steps Step Operation Display Description 1 Weighing indication status Pee FUNC NON JEPO Oon Guide the user to enter preset tare value TARE 3 Input the preset tare 6000 Press ZERO key for six times to set the lowest digit to value e g 6000 6 and press the TARE key for three times to change the value to 6000 Press the HOLD key to make confirmation and move to Step 4 4 Upper limit alarm H 00000 Press ZERO key for six times to set the lowest digit to value e g 3000 and press the TARE key for three times to change the value to 3000 Press the HOLD key to make confirmation and move to Step 5 5 Lower limit alarm L00000 Press the ZERO key to set the lowest digit to 0 and v
9. ion instruction for baud rate setting methods Data format lt Weight data including decimal point gt all data are in ASCII format Note data format header ASCII code lt Weight data including decimal point gt 6 digits including decimal point of weight data with symbol ASCII code The lower digits are in front and the higher digits and symbol digits are in the rear Negative symbol bit is and positive symbol is 0 For example if the weight shown in the indicator is 500 00kg the serial output data will be 00 005 If the weight shown in the indicator is 500 00kg the serial output data will be 00 0050 Large screen See Figure 2 4 for wiring details Large screen signal is current loop signal of 20mA constant current and is output in a serial way through binary code with a baud rate of 600 Each frame has 11 data bits including one start bit 0 eight data bits LSB in front one flag bit and one stop bit 1 Chapter III Operation Instruction I Startup The instrument gets into self check process after the power supply is connected If the weight on platform is within the startup zero setting range automatic zero setting will working than the weighing state is enabled If the weight on platform exceeds the zero setting range the indicator will give tips and indicate the said weight II Key Operation In the calibration and parameter setting state some keys will perform the following functions
10. ng lamp goes out Please charge the battery immediately in this situation The current battery voltage can be displayed when the indicator is started Please pay attention to this data from time to time III Please charge the battery for about 10 16 hours before its first use so as to avoid a too low voltage caused by self discharging of battery which may be mistakenly taken as failure IV The battery shall be charged for about 10 16 hours at a time during the normal operation If the indicator is not to be used for long the battery shall be charged for 10 16 hours every two months in order to extend its service life V The built in battery of indicator is a consumable part that is not within the range of three guarantees
11. ng light is then on Note the maximum times of accumulation is 9999 when accumulation result is ensured to be lt 999999 The accumulation results will be held before they are cleared and the data will not be lost after power off When the ACCUMULATION key is pressed if the net weight is less than 20 divisions only the accumulation value will be indicated and the accumulation of weight and times will not be made 6 Automatic accumulation of measured value Press the FUNCTION and ACCUMULATION keys at the same time in normal weighing state and not the peak value holding and average value state the indicator will enter the automatic accumulation 6 state In this case the ACCUMULATION light is on In the automatic accumulation state the indicator will perform an automatic accumulation and indicate the times of accumulation and the results whenever the measured data is larger than or egual to 20 divisions and after about 1 2 seconds after the data is stable Re press the FUNCTION and ACCUMULATION keys at the same time or press HOLD key to exit the automatic accumulation Note automatic accumulation state will be saved when the power is off however the accumulation data will be saved Clear the accumulation result Press the CLEAR key in weighing state the indicator will clear the times of accumulation and the overall accumulation data Switching between kg and lb Press the FUNCTION and HOLD keys at the same time in normal weig
12. res must be practically taken in the use and welding or other strong electric operations on weighing platform are strictly prohibited In the thunderstorm season reliable lightning protection measures must be taken to prevent lightning damaging the senor and instrument and to ensure the operator safety and the safe operation of weighing equipment and related equipment port of the indicator port of the load cell shielded S E E Eo s excitation voltaget s O O Lari T output signal IN output signal N N 5 E SH Figure 2 3 Sensor connection Please short E and S E and S if 4 core shielded cable is used or the indicator will not work properly III Serial Communication Interface and Large Screen Serial communication interface GND RXD TXD 1 The data communication between R A12 and upper computer is realized through serial communication interface in a continuous way 5 8 2 T 2 Connection mode 7 R A12 communication interface uses 9 pin socket pin laLead pin is defined as follows pin 2 is for TXD seri p p IN OUT ommunication data line and pin 5 is for ground wire c ds Jwi d Figure 2 4 Communication and ielded cable is recommended to be used as connections large screen connection line See Figure 2 4 for details 4 3 Interface parameter Signal RS232C O Baud rate 600 1200 2400 4800 9600 See the chapter of calibrat
13. rt the indicator and the factory Ge unicso setting will be recovered digits 8 Input a new full capacity e g 6000 press the ua Li a If no need of zero and full value calibration currently you can as 6 and press the 6000 press the HOLD key to move to Step 13 If re calibration is TARE key fr eos Ainan reguired the full capacity must be input again before Step 8 and to change the data to 6000 and then press the HOLD key to confirm 9 Zero calibration in this case the indicator will check the zero noloAd position automatically If zero position has never been calibrated the zero inner code will be displayed or the Step 9 will be 8 moved to rapidly 10 Full capacity calibration indicator zero position has been LoAd confirmed and the user is guided to load the weight for full capacity calibration In this case a weight which is more than 1 2 of full capacity can be loaded 11 After the weight is loaded The indicator displays the current inner code for the weight wait a few seconds to loaded to scale If the loaded weight is too small you shall go press the HOLD key back to Step 9 for re loading of weight 12 rr After the data is stable the indicator will calculate and display the weight according to original calibration rate 13 input the value of current actual weight on the scale e g 3000 press the ZERO koy dor Unnes If the weight to be

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