OXFORD G SERIES Analytical INSTRUCTION MANUAL OXFORD ELECTRONIC BALANCES ANALYTICAL PRODUCTS LTD OXFORD . OX3 8ST.
A&D GR Series Instruction Manual Contents Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Declaration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Compliance with EMC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1. Set-Up . . . . . . . . . . . . .
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A&D GR Series Instruction Manual Declaration We hereby declares that the products described herein conform to the requirements of the council directives on Electromagnetic Compatibility (EMC) 89/336/EEC and Low Voltage Equipment (LVD) 73/23/EEC amended by 93/68/EEC, provided that they bear the CE mark of conformity as shown below. Standards applicable: BS EN 55022 Limits of disturbance for Information Technology Equipment. BS EN 50082 Parts 1 & 2 Generic Immunity Standards.
English 1. Set-up 1.1. Unpacking your Balance Unpack the balance carefully and keep the packing material if you want to transport the balance. In the packing box you will find this manual and the following : Weighing Pan Breeze Break Ring Wheighing Chamber Dust Plate Final Range Breeze Break Ring This ”fine range breeze break ring“ is an accessory for the GR-202. Before weighing on the fine range, of which the minimum display is 0.
A&D GR Series Instruction Manual 1.2. Best Conditions for Weighing To ensure that you get the best performance from your balance, please observe the following conditions as closely as possible. The best operating temperature is about 20°C / 68°F at about 50% Relative Humidity. • Try to ensure a stable power source when using the AC adapter. OK Bubble NG Spirit Level • Please warm-up the balance for at least one hour. Plug-in the AC adapter as usual. • The weighing room should be free of dust.
English 1.3. Take Care of Your Balance • Do not disassemble the balance. Contact your local A&D dealer if your balance needs service or repair. • Do not use solvents to clean the balance. For best cleaning, wipe with a dry lint free cloth or a lint free cloth that is moistened with warm water and a mild detergent. • When you transport the balance, hold it as shown in the right illustration. Never lift the balance using the weighing chamber frame. • Keep magnetic substances away from the balance.
A&D GR Series Instruction Manual 1.5. Cautions during use to ensure Best Performance Note the following instructions to get accurate weighing data. • Press the RE-ZERO key before each weighing to prevent possible error. • Calibrate the balance periodically to avoid possible weighing errors. • Carry out each weighing operation quickly to avoid errors due to changes in the environment. RE -ZE RO • Close glass doors to keep out draughts.
English 1.6. Installing your Balance 1. See Section 1.5 ”Caution“ for installing your balance. Place the balance on a firm weighing table. 2. Assemble the ”Dust Plate“, ”Breeze Break Ring“ and ”Weighing Pan“ on your balance. There is a reference illustration on the previous page. OK NG Bubble Sprirt Level 3. Adjust the level of the balance using the levelling feet. Ground the balance chassis for discharging static electricity if you have a static problem. 4.
A&D GR Series Instruction Manual There are two operation types for pressing a key. Each key operation performs a different function First type: ”Press and release the key immediately” or ”Click the key” Second type: ”Press and hold the key” The first type is ”to press the key”. The first type is normal key operation during measurement. M M O O D D E E Note: Do not press and hold the key, if you do not want to perform a rewrite of the internal parameters.
English 1.8.
A&D GR Series Instruction Manual 2.Introduction Thank you for your A&D purchase! This is an Instruction Manual for the GR Series of Electronic Balances. The GR Balance is a product from years of research, design, development and in-field testing. It incorporates the latest advances in electronic and mechanical engineering and offers increased features, increased functions, high resolution and portability; all in a low profile balance base.
English 2.1. Options AD-8121 Printer • Compact thermal dot-matrix printer. • Statistical function, calender and clock function, interval print function. • 5 x 7 dots, 16 characters per line. • Print paper (AX-PP143, 45 mm(W)x50 mm(L), ø65 mm) • AC adapter or alkaline battery. AD-1653 Density Determination Kit Weight in the air Underwater weight–Weight in the air Water density Example MULTI AD FUNC -8121 TION PRINTE R G:WT /R:Q ON LIN T E SET POWE R CL CE STAT. FEED RSLT. DATA = Density 10.
A&D GR Series Instruction Manual 2.2. Specifications GR-300 G2105D Weighing capacity 310 g 210 g / 42 g 210 g 120 g Min. weighing value (1 digit) 0.1 mg 0.1 mg / 0.01 mg 0.1 mg 0.1 mg Repeatability (Standard deviation) 0.2 mg 0.1 mg / 0.01 mg 0.1 mg 0.1 mg Linearity ±0.3 mg ±0.2 mg / ±0.03 mg ±0.2 mg ±0.2 mg Stabilization time (approx.) 3.5 sec 3.5 sec / 8 sec 3.5 sec 3.5 sec Sensitivity drift (10°C ~ 30°C) Ambient temperature Min. unit weight 0.1 mg 0.1 mg 0.1 mg 0.1 mg 0.
English 3. Calibration 3.1. Calibration Group The GR series has the following calibration modes and tests. • Automatic Self Calibration • Calibration using the internal weight • Calibraton using an external weight • Calibration test using the internal weight • Calibration test using an external weight • Correction of the internal weight value Note: Calibration is controlled by the “Permission or Prohibition”. Refer to Section “Function Switch and Initialization”.
A&D GR Series Instruction Manual 3.2. Automatic Self Calibration Note: This function automatically calibrates the balance, when the balance detects an ambient temperature change. When the balance detects a change in ambient temperature, this indicator blinks and automatic self calibration is required. If the balance is not used for several minutes with this indicator blinking, the balance performs automatic self calibration. The environment will affect the time that the indicator blinks.
English 3.3. Calibration Using the Internal Weight Operation 1. Connect the AC adapter and warm up the balance for at least one hour with nothing on the weighing pan. 2. Press the [CAL] key to start calibration. 3. The balance displays CAL in and performs calibration. Prevent vibration and draughts from affecting the balance. 4. If the “GLP output (inFo)” of the “Function Table” is set to “/” or “2”, “Calibration Report” is output from RS-232C interface. 5.
A&D GR Series Instruction Manual 3.4. Calibration Test Using the Internal Weight Operation 1. Connect the AC adapter and warm up the balance for at least one hour with nothing on the pan. Press and hold the key 2. Press and hold the [CAL] key until the balance displays CC in and then release the key. Release the key 3. The balance measures the zero point. Prevent vibration and draughts from affecting the balance. 4. The measured zero point data is displayed. 5. Ready for the internal weight measurement.
English 3.5. Calibration Using an External Weight Operation 1. Connect the AC adapter and warm up the balance for at least one hour with nothing on the pan. Press and hold the key 2. Press and hold the [CAL] key until displaying CAL out and then release the key. Release the key 3. The balance displays CAL 0. • If you want to change the calibration weight value, proceed to step 4. • If you use the stored calibration weight value in the balance, proceed to step 5. 4.
A&D GR Series Instruction Manual 6. Place the displayed calibration weight on the pan and press the [PRINT] key. The balance displays the measured calibration weight. 7. Remove the weight from the pan after the balance displays End. From Previous Page Calibration weight 8. If the “GLP output (inFo)” of the “Function Table” is set to “/” or“2”, “Calibration Test Report” is output by the RS-232C interface. 9. The balance will automatically return to the weighing mode after calibration. 10.
English 3.6. Calibration Test Using an External Weight Note: This function tests the balance accuracy using an external weight. A weight which is used for the calibration test is called “the target weight”. The weight which you have is called “the external weight”. Operation 1. Connect the AC adapter and warm up the balance for at least one hour with nothing on the pan. Press and hold the key 2. Press and hold the [CAL] key until displaying CC out and then release the key. Release the key 3.
A&D GR Series Instruction Manual 6. Place the displayed target weight on the pan and press the [PRINT] key. The balance displays the measured target weight and displays it. Prevent vibration and draughts from affecting the balance. 7. Remove the weight from the pan after the balance displays End. From Last Page Target weight 8. If the “GLP output (inFo)” of the “Function Table” is set to “/” or“2”, “Calibration Test Report” is output by the RS-232C interface. 9.
English 3.7. Correcting the Internal Weight Value Note: The GR series can correct the internal weight value within 21.5 mg. The initial internal weight value of the GR-120 is 100.0000 g. The initial internal weight value of the GR-200, GR-300 and GR-202 is 200.0000 g. Example Weighing the same weight The internal weight is corrected to +0.6 mg. The balance is calibrated with the internal weight. 200g 200g Operation 1. Turn off the display using the [ON:OFF] key. 2.
A&D GR Series Instruction Manual From Previous Page 8. Press the [PRINT] key to enter into the procedure for correcting the internal weight value. 9. Correct the internal weight value using the following keys. [RE-ZERO] key The value is selected. (+1.5 mg ~ –1.5 mg) [PRINT] key The new value is stored and iD is displayed. [CAL] key This correction is cancelled and iD is displayed. 10.Press the [CAL] key. The balance will return to the weighing mode. 11.Press the [CAL] key to calibrate the balance.
English 4. Adapting to the Environment 4.1. Response Adjustment This function stabilises the weight value, helping to reduce the effects caused by draughts and/or vibration at the balance location. This function makes adjustments by automatically analysing the environment or by manual operation. The function has three stages: Indicator Function table Summaries FAST Cond 0 Fast response, Sensitive value MID.
A&D GR Series Instruction Manual 4.3. Manual Response Adjustment This function updates the response adjustment manually. Operation 1. Press and hold the [MODE] key until RESPONSE is displayed. Press the [MODE] key immediately. 2. Select a stage of the response adjustment using the [MODE] key. Either [FAST] or [MID.] or [SLOW] can be selected. 3. The balance returns to the weighing mode after a few seconds.
English 5. Weighing Units The most common unit of weight used around the world is grams, but there is often a need to shift to an alternative unit specific to the country where the balance is used or to select modes such as counting or percent. The unit can be selected by the function table.
A&D GR Series Instruction Manual 5.1. Operation of unit selection The unit can be selected in the function table. The selected unit of displaying the unit can be arranged to fit the frequency of use in the function table. According to the sequence of displayed unit, the units can be changed with the [MODE] key in the weighing mode. 5.2. Selecting a unit and arranging the sequence of display 1. Press and hold the [RANGE] key to display bASFnc of the function table. 2.
English 6. Weighing mode 6.1. Basic Operation (gram mode) 1. Calibrate your balance before use. (Refer to Section 3 “Calibration”.) 2. Place a container on the weighing pan if necessary. Press the [RE-ZERO] key to cancel net weight. The balance displays zero. Container: A vessel placed on the pan, but not to be included in the weighing data. 3. Place material on the pan or in the container. 4. Wait for the stabilization indicator to be displayed and read the data 5.
A&D GR Series Instruction Manual 8. If you add a few more items, the ACAI indicator turns on. (The ACAI indicator turns off if in overload.) ACAI indicator 9. The balance re-calculates the unit weight while the ACAI indicator is blinking. Wait and do not touch the items on the pan until the ACAi indicator turns off automatically. Detecting items Calculating unit weight 10. You are now able to count items with a more accurate unit weight. 11. If you add a few more items, proceed to step 8.
English 7. Function Switch and Initialisation 7.1. Permission or Prohibition The balance stores parameters that must not be changed carelessly (eg. Calibration data for precision weighing, Data for adapting to environment, Contro data for RS-232C interface, etc.). There are five switches for the purpose of preserving these parameters. Each switch can select either “permission” or “prohibition”. The “prohibition” protects against careless operation.
A&D GR Series Instruction Manual 7.2. Initialising the Balance This function returns the following parameters to factory settings. • Calibration data. • Function table. • The 100% weight. • The data that is stored in the balance using data memory function. • External calibration weight and target weight. • Switch settings for “Permission or Prohibition”. Operation 1. Turn off the display. 2. Press the [ON:OFF] key while the [RANGE] key and [PRINT] key are pressed and held. Then the balance displays PS. 3.
English 8 . F u n c t i o n Ta b l e The “Function Table” reads or rewrites the parameters that are stored in the balance. These parameters are stored until the next change is made, even when the power is removed from the balance. Note: The balance may not work effectively when a combination of parameters and environments are incorrect. Confirm the parameter setting before changing it. Structure and Sequence of the Function Table The function table menu consists of two layers.
A&D GR Series Instruction Manual 8.1. Function Table Displays and Keys The “o” symbol is displayed next to a selected parameter. RANGE RE-ZERO PRINT CAL GB 34 When the key is pressed and held in weighing mode, the balance enters the “function table mode”. The key to change the class or item in the function table mode. Selects the parameter, when the balance displays an item. Moves an item from the class, when the balance displays a class.
English 8.2. Details of the Function Table Class bASFnc Environment, Display Item Cond Condition St-b Stability band width trc Zero tracking SPd Display update rate Pnt Decimal point P-on Automatic start dout Data output Summaries Parameter 0 •1 2 0 •1 2 0 •1 •0 1 •0 1 •0 1 •0 1 Prt Data output mode 2 3 Fast response, Sensitive value Common data of “Response adjustment”.
A&D GR Series Instruction Manual Class dout Data output Item Cond Condition PUSE Data Pause At-F Auto-feed inFo GLP output Ar-d Zero after output SiF Serial Interface bPS baud rate btPr Length, parity bit CrLF Terminator tyPE Data format t-UP Receive time ErCd and error code CtS CTS control Summaries Parameter •0 1 •0 1 •0 1 •0 1 2 •0 1 0 1 •2 3 4 •0 1 2 •0 1 •0 1 2 3 4 0 •1 •0 1 •0 1 No output Output No pause Pause (1.
English 8.3. Explanation of item “Environment, Display” Condition (Cond) Cond 0 This parameter is for sensitive response to the fluctuation of a weight value. Use for target weighing of powder, weighing of a very light sample or weighing requiring a quick response. Cond 2 This parameter is for stable weighing with slow response. Use to prevent a weight value from drifting depending on the balance location. Stability band width (St-b) This item controls the width of a weight value as a stable value.
A&D GR Series Instruction Manual 9. Serial Interface 9.1. “Data output mode” The [PRINT] key can be used at any time for transmitting data. Key Mode When you press the [PRINT] key and the display value is stable, the balance outputs the weighing data and the display blinks one time.
Required setting Example dout Prt 3 Stream mode dout dAtA 1 Data memory function is used dout int Interval time “Periodical weighing without computer command and outputting all of the data to a computer at one time.” 9.2. “Data format” A&D standard format SiF tyPE 0 This format is used when the peripheral equipment, capable of receiving A&D format, is connected. If an AD-8121 is used, set the printer to mode 1 or 2. • • • • • This format consists of fifteen characters (excluding the terminator).
A&D GR Series Instruction Manual KF format SiF tyPE 2 This is the Karl-Fischer moisture meter format, and is used when the peripheral equipment can only communicate using this format. • • • • • This format consists of fourteen characters (excluding the terminator). This format has no header characters. The polarity sign is first, if not zero or overloaded. The weight data uses spaces in place of leading zeros. This format outputs the unit "g" only for a stable value.
English 9.3.
A&D GR Series Instruction Manual GB 42
English 10. ID Number and GLP Report • The ID number is used to identify the balance when Good Laboratory Practice (GLP) is used. • The ID number is output on the “Calibration Report”, “Calibration Test Report” and “Title Block”. • The GLP output format is selected at the “GLP output (inFo)” of the “Function Table”. • The balance can output the following reports for GLP: “Calibration Report” using the internal weight. “Calibration Report” using an external weight.
A&D GR Series Instruction Manual 10.2. GLP output Set the following parameters to output the report: • If the report is printed, set the “GLP output (inFo)” to “1”. The AD-8121 printer is used in this explanation. Refer to “14. Connection to the AD-8121”. The AD-8121 uses MODE 3. • If the report is output to the RS-232C interface of a computer, set the “GLP output (inFo)” to “2”. 10.3. Calibration report using the internal weight Key operation 1. Press the [CAL] key to display cAL in.
English 10.4. Calibration test report using the internal weight Key operation 1. Press and hold the [CAL] key until displaying CC in. Release the key. 2. The balance displays CC and performs calibration test automatically. 3. The zero point is measured and this value is displayed. 4. The internal weight is measured and this value is displayed. 5. If the calibration test report is output, GLP is displayed and the GLP data is output. 6. The balance returns to the weighing mode automatically.
A&D GR Series Instruction Manual 10.5. Calibration report using an external weight Key Operation 1. Press and hold the [CAL] key until displaying CAL out. Release the key. 2. The balance displays CAL 0. • If you want to change the calibration weight value, proceed to step 3. • If you use the stored calibration weight value in the balance, proceed to step 4. 3. Press the [RANGE] key and adjust the calibration weight using the following keys.
English 10.6. Calibration test report using an external weight Key Operation 1. Press and hold the [CAL] key until displaying CC out. Release the key. 2. The balance displays CC 0. • If you want to change the calibration weight value, proceed to step 3. • If you use the stored calibration weight value in the balance, proceed to step 4. 3. Press the [RANGE] key and adjust target weight using the following keys.
A&D GR Series Instruction Manual 10.7. Title Block and End Block Use When a weight value is recorded as the GLP data, the GLP report can put the weighing value between “Title block” and “End block”. Caution If data memory function is used, the “Title block” and “End block” can not be output. Use MODE 3 of the AD-8121. Key Operation 1. Press and hold the [PRINT] key to display StArt and release the key. The “Title block” is output. 2. The weighing data is output. 3.
English 11. Data Memory Function 11.1. Use and Method of Storing Data • The data memory function can store 200 sets of weighing data. If the power switch is turned off, AC power is interrupted or the AC adapter is removed, the data is maintained in non-volatile memory. • It is not necessary for the printer or computer to be continually connected to the balance, because the balance stores the weight data in memory. • There are four types of operating modes to store the data.
A&D GR Series Instruction Manual • When weighing data is being placed in memory, the data cannot be output to the RS-232C interface. • The “FUL” displays full memory. More data cannot be stored until deletion of the stored data. • Automatic self calibration cannot be used while the interval memory mode is working. • The Q S SI SIR following commands cannot be used during data storage. Query command for weighing data. Request command for stable weighing data. Query command for weighing data.
English Transmiting All Data at One Time 1. Setup the RS-232C interface using “SiF” of the function table. 2. Press and hold the [PRINT] key until displaying rECALL and release the key. 3. Press the [RANGE] key to display out. 4. Press the [PRINT] key to enter this mode. 5. Press the [RE-ZERO] key. Then the balance displays out Go. 6. Press the [PRINT] key to transmit all data to RS-232C interface. 7. The balance displays CLEAr after the finish. 8. Press the [CAL] key to return to weighing mode.
A&D GR Series Instruction Manual 12. Underhook The underhook can be used for weighing large items, such as magnetic material or density measurement. The built-in underhook is behind the plastic cap on the under side of the balance. • When not using the underhook, attach the plastic cap to prevent dust from getting into the balance. • The underhook can only be used to support items within the weight range of the balance. Do not overload it. • Operate the underhook with care.
English 13. Specific gravity (density) measurement GR series balances are equipped with the specific gravity measuring mode. It calculates the density of solid according to the weight of the sample in air and weight in liquid. • The specific gravity measuring mode is not ready for use upon receiving the balance. To use the mode, change the function table and activate the specific gravity measuring mode.
A&D GR Series Instruction Manual 2. In the specific gravity measuring mode, press and hold the [MODE] key to enter the mode to set the liquid density. Note • In the normal weighing mode, the same procedure will activate the automatic response adjusment. This function is not avaible in the specific gravity measuring mode.
English Entering the density directly (Ld in 1) In the specific gravity measuring mode, press and hold the [MODE] key until the density currently set (unit: g/cm3, factory setting: 1,0000g/cm3 is displayed. Use the following keys to change the value. [RE-ZERO] key Changes the numerical value of the digit selected. [RANGE] key Selects the digit to change the value.
A&D GR Series Instruction Manual Measuring procedure Step 1 Confirm that the balance is in the mode to measure the weight of the sample in air. („g“ displayed and processing indicator flashing) Step 2 Confirm that the balance indicates zero. If it does not indicate zero, press the [RE-ZERO] key to reset the displayed value to zero. Step 3 Place the sample on the upper pan (in air).
English 14. RS-232C Specifications 14.1. Setting of the ID Number Transmission system: Transmission form: Data format: EIA RS-232C Asynchronous, Baud rate: Data: Parity: Stop bit: Code: bi-directional, half duplex 600, 1200, 2400, 4800, 9600 bps 7 or 8 bits Even, Odd (7 bits) None (8 bits) 1 bit ASCII RS-232C -5 V ~ -15 V +5 V ~ +15 V Data bits Start bit Stop bit Parity bit Pin connections Pin No.
A&D GR Series Instruction Manual 15. Connection to Equipment 15.1. Connection to the AD-8121 Printer • Set the following parameters to use the AD-8121 printer. Function items Summaries dout Prt 0, 1, 2, 3 Selection of a print mode. dout AP-P 0, 1, 2 Selection of the polarity for the auto-print mode. dout AP-b 0, 1, 2 Selection of the auto-print band. dout PUSE 0, 1 Selection of pause. SiF bPS 2 “2400bps”. SiF btPr 0 “7 bits, Even parity check”. SiF CrLF 0 “CR, LF”.
English 15.2. Connection to a Computer • The RS-232C is of the DCE type (Data Communications Equipment) and can use standard DCE cables. • When connecting to other equipment, check the specific manual for proper settings and connections. • Keep the RTS line set "HI", when RTS is used. Program Example This example sets the display to zero, waits for placing a weight, requires stable weighing data and displays it.
A&D GR Series Instruction Manual 16. Commands 16.1. Command list Commands to request weighing data C Cancel command for the SIR command. Q Query command for weighing data. S Request command for stable weighing data. SI Query command for weighing data. SIR Request command for continuous weighing data. Commands to control the balance CAL Calibration command. MCL Command to delete all stored data. MD:nnn Command to delete data of data number nnn. OFF Display OFF command.
English 16.2. Commands to Request Weighing Data Cancel command for the SIR command The balance will stop sending data in stream mode. Command Reply (Output is stopped) Query command for weighing data The balance will respond with the weighing data immediately. Command Reply Request command for stable weighing data The balance display will blink when the data is transmitted. Command Reply Query command for weighing data The balance will respond with the weighing data immediately.
A&D GR Series Instruction Manual 16.3. Commands to Control the Balance Calibration command Balance performs calibration using the internal weight. Command Reply (Balance is calibrated) Command to delete all stored data. Command Reply ( code is replied) Command to delete data of data number nnn. Command Reply ( code is replied) Display OFF command If the balance is ON, it will turn OFF. If the balance is already off, nothing will happen.
English Calibration test command The balance performs the calibration test using the internal weight. Command Reply (Calibration test is performed) Same as the [MODE] key, Unit command. The unit can be changed. The command works as the [MODE] key. Command Reply (Unit is changed) 16.4. Commands to Request Memory Data Output command to transmit all memory data. Command Reply (Case to output data number) Request command to transmit data of data number nnn.
A&D GR Series Instruction Manual 16.5. Acknowledge Code and Error Codes This is an explanation of ErCd in the function list (06h) --- Acknowledge in ASCII code. In the Case of erCd 0 • The balance does not output code or the error code. In the Case of erCd 1 • When the balance receives a command requesting data and cannot process it, the balance transmits an error code ( EC, Exx). When the balance is able to process a command requesting data, the balance outputs the data.
English 16.7. Command Examples This example is set to CtS 1 to output the code. There is a delay time required between receiving and transmitting the next command. When the command is transmitted to the balance, include a time delay as follows : 1… Example of a BASIC program 120 LINE INPUT #1, AK$ (delay statement) 130 FOR LL = 1 TO 1000 : NEXT LL 140 PRINT #1, “Q” + CHR$(13) 1… is Acknowledge in ASCII code 06h. “LL” is the delay variable.
A&D GR Series Instruction Manual CAL Command (To calibrate the balance) Computer Time Balance Weighing mode CAL command Confirmation of command receipt Message of “start” Ready Measurement of zero point Ready Measurement of internal mass Message of “end” Process of zero display Command completion Weighing mode GB 66
Computer Time Balance Weighing mode R command Confirmation of command receipt Processing command Assume that the balance can not stabilize due to vibration. The balance sends an error code and displays it. CAL command If a CAL command is received, the R command canceled. Weighing mode GB 67 English Error Code and Command Cancellation Example: When the R command is received, but the balance cannot process it and an error code is output. This example is set to ErCd 1.
A&D GR Series Instruction Manual 17. Maintenance • Do not disassemble the balance. Contact your local A&D dealer if your balance needs service or repair. • Please use the original shipping box for transportation. • Do not use organic solvents to clean the balance. Use a warm lint free cloth that is damp, along with a detergent for cleaning. • The “Floor Plate of the Weighing Chamber” can be removed and cleaned. • See “Section 1.5. Caution” when operating the balance. 17.1.
Error code English Display Description of the error EC, E06 Format error A command includes incorrect data. Confirm command. ex. Data is numerically incorrect. EC, E07 Range error for a parameter The received data exceeds the range that the balance can accept. Confirm parameter range of command. Internal condition information There is no problem when this is displayed for a few seconds and returns to weighing mode. Turn the balance off then on again, if this display is continuously displayed.
A&D GR Series Instruction Manual Display Error code Description of the error Weighing pan Error This is a warning that the weight value is too light. Confirm that the weighing pan and the pan support are properly installed. Unit weight, 100% weight error The unit weight of the sample is very light in the counting mode, or the 100% sample is too light in percent mode. The balance can not calculate it. Increase the unit weight or 100% weight.
English 17.2. Other Symbols When this indicator blinks, automatic self calibration is required. The indicator blinks when the balance detects a change in ambient temperature. If the balance is not used for several minutes with this indicator blinking, the balance performs automatic self calibration. The environment may affect the blinking time.
