ふ Analytical Balance GH-120 GH-200 GH-300 GH-202 GH-252 1WMPD4000891C
© 2008 A&D Company Ltd. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, or translated into any language in any form by any means without the written permission of A&D Company Ltd. The contents of this manual and the specifications of the instrument covered by this manual are subject to change for improvement without notice. Windows, Word and Excel are registered trademarks of the Microsoft Corporation.
Contents Basic Operation 1. Introduction .....................................................................................................................3 1.1. About This Manual .........................................................................................................3 1.2. Features..........................................................................................................................4 1.3. Compliance......................................................................
10.6. 10.7. Data Format Examples ............................................................................................... 42 Clock and Calendar Function...................................................................................... 44 11. 11.1. 11.2. ID Number and GLP Report ....................................................................................... 46 Setting the ID Number.................................................................................................
1. Introduction This manual describes how the balances of GH series work and how to get the most out of them in terms of performance. Read this manual thoroughly before using the balance and keep it at hand for future reference. 1.1. About This Manual This manual consists of the following five parts: Basic operation ........................ Describes precautions, the balance's construction and basic operation. Adapting to the environment ....
1.2. Features Automatic self calibration, using the internal mass, adapting to changes in temperature. Response adjustment adapting to drafts and/or vibration automatically. Memory function to store weighing data and calibration data. When weighing data is stored only, 200 data can be stored in maximum. Interval memory mode to store the weighing data periodically. Good laboratory practice (GLP) data can output using the RS-232C serial interface.
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2. Unpacking the Balance Unpack the balance carefully. Keep the packing material to be used for transporting the balance in the future. See the illustrations to confirm that everything is contained. Fine range breeze break ring This ring is an accessory for the GH-252 and GH-202. Before weighing with a minimum display of 0.01 mg, install this ring in place of the "breeze break ring" to avoid errors caused by drafts.
2.1. Installing the Balance 1 2 3 Install the balance as follows: Consider the section "3. Precautions " for installing your balance. Place the balance on a firm weighing table. Assemble the "Dust Plate", "Breeze Break Ring" (or "Fine range breeze break ring") "Pan support", and "Weighing Pan" on your balance. There is a reference illustration on the previous page. Leveling feet Adjust the level of the balance using the leveling feet.
3.2. During Use Note the following items to get accurate weighing data. Metal case Discharge static electricity from the weighing material. Charged material When weighing sample (plastics, insulator, etc.) could have a static charge, the weight value is influenced. Ground the balance, and Eliminate the static electricity using the optional AD-1683. Try to keep the ambient humidity above 45%RH at the room. Use a metal shield case. Grounding Wipe a charged material (plastic sample etc.) with a damp cloth.
Press the RE-ZERO possible errors. key before each weighing to prevent Calibrate the balance periodically so as to eliminate possible errors. Take into consideration the affect of air buoyancy on a sample when more accuracy is required. Avoid foreign matter (dust, liquid or metal fragments) that could get inside the balance. Operate your balance gently. Shorten the operation time as much as possible ( Opening and closing door, putting and removing sample).
4. Display Symbols and Key Operation Display The amount of stored data with memory data function Response indicator (Displayed for about 30 seconds when weighing starts.
5. Weighing Units 5.1. Units All weighing units and weighing modes are as follows: Percent mode Counting mode g mg pcs % oz ozt ct d m t tl GN dwt mom Density mode To use this mode, it must be stored in the function table as described on page 14. For details about this mode, refer to "14. Density Measurement". To select this mode, press the MODE key until the processing indictor blinks with the unit "g" displayed.
The tables below indicate the weighing capacity and the minimum display for each unit, depending on the balance model. GH-252 Unit Gram Milligram Ounce (Avoir) Troy Ounce Metric Carat Momme Pennyweight Grain (UK) Tael (HK general, Singapore) Tael (HK jewelry) Tael (Taiwan) Tael (China) Tola (India) Messghal Standard range Minimum Capacity display 250 0.0001 250000 0.1 8.82 0.00001 8.04 0.00001 1250 0.001 66.7 0.0001 160.8 0.0001 3858 0.002 6.61 0.00001 6.68 0.00001 6.67 0.00001 8.00 0.00001 21.43 0.
GH-300 Unit Gram Milligram Ounce (Avoir) Troy Ounce Metric Carat Momme Pennyweight Grain (UK) Tael (HK general, Singapore) Tael (HK jewelry) Tael (Taiwan) Tael (China) Tola (India) Messghal GH-200 GH-120 Capacity 320 320000 11.29 10.29 1600 85.3 205.8 4938 8.47 8.55 8.53 10.24 27.44 68.3 220 220000 7.76 7.07 1100 58.7 141.5 3395 5.82 5.88 5.87 7.04 18.86 46.9 13 120 120000 4.23 3.86 600 32.0 77.2 1852 3.17 3.21 3.20 3.84 10.29 25.6 Minimum display 0.0001 0.1 0.00001 0.00001 0.001 0.0001 0.0001 0.
5.2. Changing the Units The units or modes can be selected and stored in the function table. The sequence of displaying these can be arranged to fit the frequency of use. The units stored are maintained in non-volatile memory, even if the AC adapter is removed. 1 Press and hold the RANGE key until ba5fnc of the function table is displayed in the weighing mode, then release the key. 2 Press the RANGE key several times to display Unit . 3 Press the PRINT key to enter the unit selection mode.
5.2.1. Unit setting example The example below sets the units in the order with g (gram) as the first unit followed by pcs (counting mode). 1 Press and hold the RANGE key until ba5fnc of the function table is displayed in the weighing mode, then release the key. 2 Press and hold Press the RANGE key several times to display Unit . Press several times 3 Press the PRINT key to enter the unit selection mode. 4 Press the RE-ZERO key to specify the unit of g.
6. Weighing Precautions for the weighing operation Press the RE-ZERO key each time, before placing a sample on the weighing pan, to prevent possible errors. Place a sample in the center of the weighing pan gently. Temperature changes during measurement may cause weighing error. Shorten the operation time as much as possible. ( Opening and closing door, putting and removing sample) Use a pair of tweezers to avoid a temperature change due to having your hand in the weighing chamber.
6.2. Dual Range Precision range Standard range Weighing range GH-252 GH-202 0 g to 101 g 0 g to 51 g 101 g to 250 g 51 g to 220 g The GH-252 and GH-202 are equipped with two ranges "precision range" and "standard range". Available minimum display 0.01 mg Precision Range Turn on the balance When weighing is started by pressing the ON:OFF key, the minimum display will be 0.1 mg. 0.1 mg 0.1 mg Standard Range Turn on the balance Minimum display Minimum display 0.1mg 0.
6.3. Counting Mode (PCS) This is the mode to determine the number of objects in a sample based on the standard sample unit mass. The unit mass means an average mass of the samples. The smaller the variation in the samples, the more accurate the count will be. The balance is equipped with the Automatic Counting Accuracy Improvement (ACAI) function to improve the counting accuracy. Notes Use samples with a unit mass of 1 mg or more for counting.
Counting mode using the ACAI function The ACAI is a function that improves the accuracy of the unit mass automatically by increasing the number of samples as the counting process. ACAI: Automatic Counting Accuracy Improvement 8 9 If a few more samples are added, the processing indicator turns on. To prevent an error, add three or more. The processing indicator does not turn on if overloaded. Try to add the same number of samples as displayed.
6.4. Percent Mode (%) The percent mode displays the weight value in percentage compared to a 100% reference mass and is used for target weighing or checking the sample variance. Selecting the percent mode 1 Press the MODE key to select the unit % (Percent mode). If the percent mode can not be selected, refer to "5. Weighing Units". Storing the 100% reference mass 2 3 4 Press the RANGE key to enter the 100% reference mass storing mode.
7. Response Adjustment This function stabilizes the weight value, reducing the influence on weighing that is caused by drafts and/or vibration at the place where the balance is installed. This function adjusts by automatically analyzing the environment or by hand-operation. The function has three stages as follows : Response Indicator Parameter Response Stability indicator FAST Cond 0 Fast response, Sensitive value MID. Cond 1 Slow response, Stable value SLOW Cond 2 7.1.
7.2. Manual Response Adjustment 1 Press and hold the MODE key until RESPONSE is displayed, then release the key. Press the MODE key again quickly. Press and hold Release Press again immediately 2 Select a stage of the response adjustment using the MODE key. Either FAST , MID. or SLOW can be selected. Select a parameter Release and wait 3 The balance displays 1end1, returns to the weighing mode and displays the updated response indicator for about thirty seconds.
8. Calibration 8.1. Calibration Group Calibration Automatic self calibration (Calibration due to changes in temperature) Calibration using the internal mass (One-touch calibration) Calibration using an external weight that you have Calibration test Calibration test using the internal mass Calibration test using target mass that you have Correction of the internal mass value Correction of the internal mass value Caution Do not allow vibration or drafts to affect the balance during calibration.
8.2. Automatic Self Calibration Automatic self calibration due to changes in temperature This function automatically calibrates the balance when the balance detects an ambient temperature change. If GLP output is selected in the function table, the balance outputs the calibration report or stores the data in memory. Automatic self calibration functions even if the display is turned off (standby state). Refer to "9-1. Permit Or Inhibit" for the operation.
8.4. Calibration Test Using the Internal Mass This function tests the balance accuracy using the internal mass. (Balance is not calibrated) When the GLP output is set, the calibration test report is output or stored. 1 Connect the AC adapter and warm up the balance at least one hour. 2 Press and hold the CAL key until is CC in displayed, then release the key. 3 The balance measures the zero point. Prevent vibration and drafts to affect the balance. 4 The measured zero point data is displayed.
8.5. Calibration Using an External Weight This function calibrates the balance using an external weight. 1 Connect the AC adapter and warm up the balance for at least one hour with nothing on the weighing pan. Press and hold 2 Press and hold the CAL key until Calout is displayed, then release the key. 3 4 Release The balance displays Cal 0 . If you want to change the calibration mass, press the RANGE key and proceed to step 4.
8.6. Calibration Test Using an External Weight This function tests the weighing accuracy using an external weight. Calibration test report can be output or stored with "GLP output (info)" (Calibration test does not perform calibration). Connect the AC adapter and warm up the balance for at least one hour with nothing on the weighing pan. 2 Press and hold the CAL key until CC out is displayed, then release the key. 3 The balance displays CC 0 .
8.7. Correcting the Internal Mass Value The balance can correct the internal mass value within the range shown below. This function corrects the internal mass value to conform to an external weight. The corrected mass value is maintained in non-volatile memory even if the AC adapter is removed. The internal mass value is corrected as follows: The same mass Model Target Range 200g 200g Correct the internal GH-120 100.000 g mass by +0.6mg. GH-200 Calibrate with this 200. 0 000 g 200.0006g ±1.5 mg GH-300 200.
9. Function Switch and Initialization 9.1. Permit or Inhibit The balance stores parameters that must not be changed unintentionally (Example: Calibration data for accurate weighing, Data for adapting to the operating environment, Control data for the RS-232C interface). There are five switches for the purpose of protecting parameters. Each switch can select either "permit" or "inhibit". "Inhibit" protects parameters against unintentional operations. 1 Press the ON:OFF key to turn off the display.
9.2. Initializing the Balance This function returns the following parameters to factory settings. Calibration data Function table The sample unit mass value (counting mode), 100% reference mass value (percent mode) The data that is stored in the balance using the data memory function External calibration weight and target mass value Function switch settings ("9.1. Permit Or Inhibit") Liquid density and temperature in the density mode Note Be sure to calibrate the balance after initialization.
10. Function Table The function table reads or rewrites the parameters that are stored in the balance. These parameters are maintained in non-volatile memory, even if the AC adapter is removed. The function table menu consists of two layers. The first layer is the "Class" and the second layer is the "Item". 10.1. Setting the Function Table Display symbol and keys The symbol "〇" shows effective parameter. When pressing and holding the key in the weighing mode, the mode enters the function table mode.
Setting procedure 1 Press and hold the RANGE key until ba5fnc of the function table is displayed in the weighing mode, then release the key 2 Press the RANGE key to select a class. 3 Press the PRINT key to enter the class 4 Press the RANGE key to select a item. 5 Press the RE-ZERO key to select a parameter for the selected item. 6 If storing parameters of the selected class, press the PRINT key. Then the next class is displayed. If canceling the current operation, press the CAL key.
Setting example This example sets "Stores weighing data" for "Data memory" and "1 minute" for "Interval time".
10.2. Details of the Function Table Class Item and Parameter Cond Condition 5t-b Stability band width ba5fnc trc Environment Zero tracking Display 5pd Display refresh rate pnt Decimal point p-on Auto display-ON Cl adj Clock Description 0 1 2 0 1 2 0 1 2 3 0 1 0 1 0 1 Fast response, sensitive value FAST Slow response, stable value Stable range is ±1 digit Can be changed by response MID. adjustment. SLOW Stable range is ±3 digits OFF Normal Strong Very strong 5 times/second 10 times/second Point (.
Class Item and Parameter Description 0 Every measurement 1 2 seconds 2 5 seconds 3 10 seconds int Interval time in the interval memory 4 30 seconds mode when using prt 3, data 1 Interval time 5 1 minute 6 2 minute 7 5 minute 8 10 minute d-no 0 No output Refer to "12. Data Memory" Data number output 1 Output 0 No output Selects whether or not the time 5-td dout 1 Time only or date is added to the weighting data. Refer to "10.7.
t-Up Timeout 5if erCd Serial AK, Error code interface Ct5 CTS, RTS control d5 fnc ldin Density function Liquid density input Unit Unit C5 in Internal mass correction id ID number setting 0 1 0 1 0 1 0 1 No limit 1 second No output Output Not used Used Water temperature Liquid density Selects the wait time to receive a command. AK: ASCII code 06h Controls CTS and RTS. Available only when density mode is selected Refer to "5. Weighing Units".
10.3. Description of the Class "Environment, Display" Condition ( Cond ) Cond 0 This parameter is for sensitive response to the fluctuation of a mass value. Used for powder target mass, weighing a very light sample or when quick response weighing is required. After setting, the balance displays FAST. Cond 2 This parameter is for stable weighing with slow response. Used to prevent a mass value from drifting due to vibration or drafts. After setting, the balance displays SLOW.
10.4. Description of the Item "Data Output Mode" The parameter setting of "Data output mode (prt)" applies to the performance when the "Data memory (data)" parameter is set to "2" (to store the weighing data) and when the data is transmitted using the RS-232C interface. Key mode When the PRINT key is pressed with the stabilization indictor turned on, the balance outputs or stores the weighing data and the display blinks one time.
Interval memory mode The weighing data is periodically stored in memory. Example For periodical weighing without a personal computer command and to output all of the data, to a computer, at one time. The GH series can use time and date with "Time/Date output (5-td)". Required setting dout prt 3 Interval memory mode dout data 2 Data memory function is used dout int Interval time Optional setting dout 5-td1, 2, or 3 Adds the time and date. 10.5.
KF format 5if 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 placed before the data, with spaces in place of leading zeros, if the data is not zero or overloaded. This format outputs the unit only for a stable value. + 0 .
CSV format 5if type 5 This format separates the data of A&D standard format and the unit by a comma ( , ). This format outputs the unit even when the data is overloaded. When a comma ( , ) is selected for the decimal point, the separators are set to semicolon ( ; ).
10.6. Data Format Examples Stable Unstable Overload Positive error Overload Negative error A&D DP KF MT NU S T , + 0 0 0 . 1 2 7 W T + 0 . 1 2 0 . 1 2 7 8 + 0 . 1 2 7 S + 0 0 0 0 . 1 2 7 8 CR A&D DP KF MT NU U U S - S , S - 0 1 1 8 . D - 1 0 0 1 8 . 8 7 8 g 8 g CR LF g CR LF CR LF g CR LF LF 8 . 3 6 9 0 g CR LF 1 8 . 3 6 9 0 g CR LF C L 3 6 9 0 R F g CR LF 8 .
Units A&D g D.P.
10.7. Clock and Calendar Function The balance is equipped with a clock and calendar function. When the "GLP output (info)" parameter is set to "1" or "2" and the "Time/Date output (5-td)" parameter is set to "1", "2" or "3", the time and date are added to the output data. Set or confirm the time and date as follows: Operation 1 Press and hold the RANGE key until ba5fnc of the function table is displayed in the weighing mode, then release the key. 2 Press the RANGE key several times to display Cl adj .
Setting the date 7 Set the date using the following keys. RANGE key .............. The key to select the digits to change the value. The selected digits blink. RE-ZERO key ..... The key to increase the value by one. MODE key .......... The key to decrease the value by one. PRINT key .......... The key to store the new setting, display end and proceed to step 8. CAL key ................... The key to cancel the new setting and proceed to step 8.
11. 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 maintained in non-volatile memory even if the AC adapter is removed. The GLP output format is selected at "GLP output (info)" of the function table and can be output to a personal computer or printer using the RS-232C serial interface.
11.2. GLP Report Set the following parameters to output the report. Refer to "15.2. Connection to peripheral equipment" for connection to an AD-8121B. To print the report, set the "GLP output (info)" parameter to "1" and use MODE 3 of the AD-8121B. If MODE1 is used, select temporary dump print mode by pressing the STAT. key of the AD-8121B. To output the report to a personal computer using the RS-232C interface, set the "GLP output (info)" parameter to "2".
Calibration test report using an internal mass Note Calibration test does not perform calibration. Key operation 1 Press and hold the CAL key to display CC in and release the key. 2 CC is displayed and the balance is tested automatically. 3 The zero point is measured and the weight value is displayed for a few seconds. 4 Internal mass is weighed and the weight value is displayed for a few seconds. 5 If GLP output is used, glp is displayed and the calibration test report is output.
Calibration report using an external weight Key operation 1 Press and hold the CAL key to display Cal out and release the key. 2 Cal 0 is displayed. 3 When updating the calibration mass value, press the RANGE key and proceed to step 4. When using preset calibration mass value, proceed to step 5. 4 Specify calibration mass value using the following keys. RANGE key ........ The key to select the blinking figure RE-ZERO (+)key .. The key to increase the value of the blinking figure. MODE (-)key ........
Calibration test report using an external weight Note Calibration test does not perform calibration. Key operation 1 Press and hold the CAL key to display CC out and release the key. 2 Cal 0 is displayed. 3 When updating the target value, press the RANGE key and proceed to step 4. When using preset target value, proceed to step 5. 4 Specify calibration mass value using the following keys. RANGE key ........ The key to select the blinking figure RE-ZERO (+)key ..
Title block and end block When mass values are recorded as GLP data, a "Title block" is inserted at the beginning and an "End block" is inserted at the end of a group of mass values in the GLP report. Notes To output the report to an AD-8121B , use MODE 3 of the AD-8121B. If MODE1 is used, select temporary dump print mode by pressing the STAT. key of the AD-8121B. If the data memory function is used (except data 0), the "Title block" and "End block" can not be output.
12. Data Memory Data memory is a function to store weighing data and calibration data in memory. The data stored in memory are available for outputting at one time to a printer or personal computer. Weighing data Excluding date and time Including date and time Up to 200 sets Up to 100 sets Calibration report Internal calibration External calibration Calibration test report Internal test calibration External test calibration Last 50 sets 12.1.
12.2. Data Memory for Weighing Data The balance can store 200 sets of weighing data in memory (if time and date are added, the balance can store 100 sets). Even if the AC adapter is removed, the data is maintained in non-volatile memory. It is not necessary to connect the printer or personal computer to the balance continually, because the balance stores the weighing data in memory. The data in memory can be output at one time to a printer or personal computer.
Automatic self calibration can not be used while the interval memory mode is active. The following commands can not be used during data storage. Q Query command for weighing data. S Query command for stable weighing data. SI Query command for weighing data. SIR Query command for continuous weighing data.
Recalling the memory data Confirm that the "Data memory (data)" parameter is set to "1". 1 Press and hold the PRINT key until reCall is displayed, then release the key. 2 Press the PRINT key to enter the memory recall mode. The type of data appears in the upper left of the display as shown to the right. Recall the data in memory using the following keys. RE-ZERO key ..... To proceed to the next data set. MODE key ......... To go back to the previous data set. PRINT key .........
12.3. Data Memory for Calibration and Calibration Test Calibration data (when and how it is performed) and calibration test data can be stored in memory. All the data in memory is available to be output at one time to a printer or personal computer. Up to 50 data sets of the latest calibration or calibration test can be stored. When the memory capacity has been reached, "fUl" illuminates in the upper left of the display as shown below.
13. Underhook The underhook can be used for magnetic materials or density measurement. The built-in underhook is revealed by removing the cap on the bottom of the balance. Use the underhook as shown below. Caution Do not apply excessive force to the underhook. When not in use, attach the cap to prevent dust from getting into the balance. Do not push the underhook upward When turning the balance over, the weighing pan, pan support, breeze break ring and dust plate will fall off. Remove them first.
14. Density Measurement The balance is equipped with a density mode. It calculates the density of a solid using the mass value of a sample in air and the mass value in liquid. Note The density mode was not selected for use when the balance was shipped from the factory. To use the mode, change the function table and activate the density mode. When the density mode is selected, the response adjustment function can not be used. Minimum display is 0.0001 g while density mode.
Entering the density of a liquid Two ways to set the density of a liquid are available in the function table, "Liquid density input (ldin): by entering the water temperature or by entering the density directly. 1 Press the MODE key as necessary to select the density mode. When the density mode begins, "g (gram)" is displayed and the processing indicator ( ) blinks. 2 The water temperature currently set (unit:°C, factory setting : 25°C) is displayed. Use the following keys to change the value.
Measuring the density Note If the liquid temperature or the type of liquid is changed during measurement, input again the value of the liquid density as necessary. Density display is four decimal places. Minimum display can not change with the RANGE key. 1 Denisty is displayed after "Mass measurement in air" and "Mass measurement in liquid".
15. Standard Input and Output Interface 15.1. RS-232C Interface The balance is a DCE device. Connect the balance to a personal computer (DTE) using a straight through cable.
15.2. Connection to Peripheral Equipment Connection to an AD-8121B printer Preset the following parameters to use the AD-8121B printer.
Connection to a computer and the use of WinCT The balance is of the DCE type (Data Communication Equipment), which can be connected to a personal computer using the RS-232C interface. Before connection, read the personal computer manual thoroughly. Use a standard DCE cable for connection (cable type: straight-through).
15.3. Commands 15.3.1. Command List Note A command has a terminator added, that is specified using "5if Crlf" of the function table, and is sent to the balance. Commands to query weighing data C Cancels the S or SIR command. Q Requests the weighing data immediately. S Requests the weighing data when stabilized. SI Requests the weighing data immediately. SIR Requests the weighing data continuously. Commands to control the balance Same as the 1CAL1 key. CAL Turns the display off. OFF Turns the display on.
15.3.2. Acknowledge Code and Error Codes When the "Serial interface function (5if)" parameter is set to "erCd 1", the balance outputs code or error code to each command as follows: (06h) Acknowledge in ASCII code. When the balance receives a command to request data and can not process it, the balance transmits an error code (EC, Exx). When the balance receives a command to request data and can process it, the balance outputs the data.
15.3.5. Command Examples This example uses the "erCd 1" of "5if" so that the (06h) code is output.
CAL command (Calibration with internal mass) Computer Time Balance Zero display CAL command Command received Command completed Zero display Error code This example is of an error using the R command. "erCd 1" is used. The balance transmits an error code when the received command can not be achieved.
Weighing with a tare This example uses "erCd 1" of "5if" so that the (06h) code is output.
Setting a negative target value and filling with a sample until the display becomes zero This example uses "erCd 1" of "5if" so that the (06h) code is output.
16. Maintenance 16.1. Treatment of the Balance Clean the balance with a lint free cloth that is moistened with warm water and a mild detergent. Do not use organic solvents to clean the balance. Do not disassemble the balance. Contact the local A&D dealer if the balance needs service or repair. Use the original packing material for transportation. Consider "3. Precautions" when operation the balance. 16.2.
Display Error code Description Sample mass error The balance can not store the sample for the counting mode or for the percent mode because it is too light. Use a larger sample. Unit mass error The sample unit mass for the counting mode is too light. Storing and using it for counting will cause a counting error. Add samples to reach the specified number and press the 1PRINT1 key. Pressing the 1PRINT1 key without adding samples will shift the balance to the counting mode.
Display Error code Description Communications error EC,E00 A protocol error occurred in communications. Confirm the format, baud rate and parity. Undefined command error EC,E01 An undefined command was received. Confirm the command. EC,E02 EC,E03 EC,E04 EC,E06 EC,E07 Other error code Not ready A received command can not be processed. Example: The balance received a "Q" command, but not in the weighing mode. The balance received a "Q" command while processing a RE-ZERO command.
16.4. Checking the Balance Performance and Environment The balance is a precision instrument. When the operating environment or the operating method is inadequate, correct weighing can not be performed. Place a sample on the pan and remove it, and repeat this several times. If the balance seems to have a problem with repeatability or to perform improperly, check as described below. If improper performance persists after checking, contact the local A&D dealer for repair.
17. Specifications GH-120 GH-200 GH-300 Weighing capacity 120 g 220 g 320 g Maximum display 120.0084 g 220.0084 g 320.0084 g Minimum display 0.1 mg Repeatability (Standard deviation) 0.1 mg 0.2mg Linearity ±0.2 mg ±0.3 mg GH-202 GH-252 220 g 250 g 51 g 101 g 220.0084 g 250.0084 g 51.00009 g 101.00009 g 0.1 mg 0.01 mg 0.1 mg 0.02 mg 0.03 mg ±0.2 mg ±0.03 mg ±0.10 mg Approx. 3.5 seconds Approx. 8 seconds Percent Counting mode mode Stabilization time Approx. 3.
17.1.
17.2. Options and Peripheral Equipment GH-02 USB interface The interface to connect a balance to a personal computer, and is used to transmit the balance weight data to the personal computer via USB. Applicable OS is Windows 98 or later. As the Windows standard driver is used to transmit the weighing data, complicated installation of a dedicated driver is not necessary. The balance weighing data can be transmitted to applications such as Excel, Word and memo pad for Windows automatically.
AD-1653 Density Determination Kit Weigh in air x water density = sample density Weigh in water - Weigh in the air Example 10.0000 g x 0.9970 g/cm3 = 21.4 g/cm3 10.0000 g － 9.5334 g Temperature 0°C 10°C 20°C 30°C Water density 0.99984 g/cm3 0.99970 g/cm3 0.99820 g/cm3 0.99565 g/cm3 AD-1683 DC Static Eliminator The eliminator is able to dissipate static electricity on a charged sample. The eliminator does not use a ventilator and can be used in precision powder weighting.
AX-T-314A-S External key Plug This plug produces the same operations as pressing the RE-ZERO and PRINT keys. It enables remote control of the balance using an external switch. This operation must connect the GND line to the PRINT or RE-ZERO line for at least 100 miliseconds. External key Plug AX-T-314A-S Terminal AX-SW128 Foot switch The switch can be used to connect the external key plug and used to the RE-ZERO or PRINT keys.
Other options Order code AD-1682 AD-1684 AD-1685 AD-1689 AD-8526 AD-8920 AD-8922 Name and description Rechargeable Battery This option allows use of the balance in a place where AC power is not available. Electrostatic field meter This option measures the amount of the static charge on the sample, tare or peripheral equipment and displays the result. If those are found to be charged, discharge them using the AD-1683 DC static eliminator.
18. Terms/Index 18.1. Terms Calibration Adjustment of the balance so that it can weigh accurately. Calibration weight A weight used for calibration Data number Numbers assigned sequentially when weighing data or unit weight is stored. Digit The minimum weighing value available. Used for the balance, one digit is the smallest mass that can be displayed. Environment Ambient conditions such as vibration, drafts, temperature, static electricity and magnetic fields which affect the weighing operation.
18.2. Index % CC out Calibration test ............................. 27 CH 0 Response error ............................ 71 Cl adj Clock ............................................ 34 Clr Initializing the balance ................. 30 Cond Condition..........................21, 34, 37 Crlf Terminator .............................. 35, 62 C5 in Internal mass correction .............. 36 CSV format ..................................................... 41 Ct5 CTS, RTS control................... 36, 62 CTS ....
Numerical format ............................................. 40 Options ..................................................... 76 out Report output ......................... 55, 56 p5 Internal mass correction .............. 30 pnt Decimal point ......................... 34, 37 p-on Auto display-ON .................... 34, 37 prt Data output mode ............ 34, 38, 62 pU5e Data output pause ................. 35, 62 recend End block ..................................... 51 Repeatability ...................
MEMO 83
MEMO 84
