A&DメーカーGH-120/GH-200/GH-300/GH-202/GH-252の使用説明書/サービス説明書
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ふ Analytical Balance GH-120 GH-200 GH-300 GH-202 GH-252 1WMPD4000891C.
© 2008 A&D Company Lt d. 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.
1 Contents Basic Opera tion 1. Intr oducti on ................................................................................................................ .....3 1.1. About This Manual ..............................................................
2 10.6. Data Forma t Exampl es ............................................................................................... 42 10.7. Clock and Calendar Functi on...................................................................................... 44 1 1.
3 1. Introduction This manual describes how the ba lances of GH series work and how to get t he most out of them in terms of performance. Read this manual thoroughly before us ing 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 .
4 1.2. Features Automatic self calibration, using the internal mass, adapting to changes in temperature. Response adjustment adapting to dra fts and/or vibration automatically. Memory function to store weighing data and calibration data. When weighing data is stored only, 2 00 data can be stored in maximum.
5.
6 2. Unpacking the Balance Unpack the balance carefully. Keep the packing ma terial to be used for transporting the balance in the future. See the illustrations to confirm that everything is contained.
7 2.1. Installing the Balance Install the balance as follows: 1 Consider the section "3. Pr ecautions " for installing your balance. Place the balance on a firm weighing table.
8 3.2. During Use Note the following items to get accurate weighing data. Discharge static electricity from the weighing material. When weighing sample (plasti cs, insulator, etc.) could have a static charge, the weight value is influenced. Ground the balance, and E li m in a t e t he s t a t i c el e c t r i c i t y using the optional AD-1683.
9 Press the RE-ZERO key before each weighing to prevent possible errors. 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.
10 4. Display Symbols and Key Operation Display Key operation Press and release the key immediately" or "Click the key" ........................................ Press and hold the key ....................................................
11 5. Weighing Units 5.1. Units All weighing units and weighing modes are as follows: A unit or mode can be selected and stored in the function table as described in "5.2. Changing the Units". If the law in your area permits, you may use all of the units.
12 The tables below indicate the weighing ca pacity and the minimum display for each unit, depending on the balance model. GH-252 Standard range Precision range Unit Capacity Minimum display Capacity Minimum display Gram 250 0.0001 101 0.00001 Milligram 250000 0.
13 GH-300 GH-200 GH-120 Unit Capacity Minimum display Gram 320 220 120 0.0001 Milligram 320000 220000 120000 0.1 Ounce (Avoir) 11.29 7.76 4.23 0.00001 Troy Ounce 10.29 7.07 3.86 0.00001 Metric Carat 1600 1100 600 0.001 Momme 85.3 58.7 32.0 0.000 1 Pennyweight 205.
14 5.2. Changing the Units The units or modes can be selected and stor ed 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.
15 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.
16 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 cent er of the weighing pan gently. Temperature changes during measurement may cause weighing error.
17 6.2. Dual Range Weighing range GH-252 GH-202 Available minimum display Precision range 0 g to 101 g 0 g to 51 g 0.01 mg 0.1 mg 1 mg Standard range 101 g to 250 g 51 g to 220 g 0.1 mg 1 mg The GH-252 and GH-202 are equipped with two ranges "precision range" and "standard range".
18 6.3. Counting Mode (PCS) This is the mode to determi ne the num ber of objects in a sample based on the st andard sample unit mass. The unit ma ss means an average mass of th e samples. The smaller the variation in the samples, the more accurate the count wi ll be.
19 Counting mode using the ACAI function The ACAI is a function that improves th e accuracy of the unit mass automatically by increasing the number of samples as the counting process. ACAI: Automatic Counting Accuracy Improvement 8 If a few more samples are added, the processing indicator tu rns on.
20 Pan Containe r 100% mass Place sample Percentage 6.4. Percent Mode (%) The percent mode displays the weight val ue 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).
21 7. Response Adjustment This function stabilizes the we ight value, reducing the influenc e on weighing that is caused by drafts and/or vibration at the place where the balance is insta lled. This function adjusts by automatically analyzing t he environment or by hand-operation.
22 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. 2 Select a stage of the response adjustment using the MODE key. Either FAST , MID. or SLOW can be selected.
23 8. Calibration 8.1. Calibration Group Calibration Automatic self calibration (Calibrati on due to changes in temperature) Calibration using the internal mass (One-touch calibration) Calibration usi.
24 8.2. Automatic Self Calibration Automatic self calibration due to changes in temperature This function automatically calibrat es the balance when the balance detects an ambient temperature change. If GL P output is selected in the functi on table, the balance outputs the calibration report or stores the data in memory .
25 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.
26 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. 2 Press and hold the CAL key until Calout is displayed, then release the key.
27 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).
28 8.7. Correcting the Internal Mass Value The balance can correct the internal mass val ue within the range shown below. T his function corrects the internal mass value to conform to an external we ight. The corrected mass value is maintained in non-volatile memory even if the AC adapter is removed.
29 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 operatin g environment, Control data for the RS-232C interf ace).
30 9.2. Initializing the Balance This function returns the follo wing parameters to factory settings. Calibration data Function table The sample unit mass value (counting mode), 100% reference mass va.
31 10. Function Table The function table reads or rewrites the param eters that are stored in the balance. These parameters are maintained in non-volatile memo ry, even if the AC adapter is removed. The function table menu consists of two laye rs. The first layer is the "Class" and the second layer is the "Item".
32 Setting procedure 1 Press and hold the RANGE key until ba5f nc 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.
33 Setting example This example sets "Stores weighing data" for "D ata memory" and "1 minute" for "Interval time".
34 10.2. Details of the Function Table Class Item and Parameter Description 0 Fast response, sensitive value FAST 1 MID. Cond Condition 2 Slow respon se, stable va lue SLOW Can be changed by response adjustment.
35 Class Item and Parameter Description 0 Every measureme nt 1 2 second s 2 5 second s 3 10 seconds 4 30 seconds 5 1 minute 6 2 minute 7 5 minute int Interval time 8 10 minute Interval time in the interval memory mode when using prt 3 , data 1 0 No output d-no Data number output 1 Output Refer to "12.
36 0 No limit t-Up Timeout 1 1 second Selects the wait time to receive a command. 0 No output erCd AK, Error code 1 Output AK: ASCII code 06h 0 Not used 5if Serial interface Ct5 CTS, RTS control 1 Used Controls CTS and RTS.
37 10.3. Description of the Class "Envir onment, Display" Condition ( Cond ) Cond 0 This param eter 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.
38 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 weighi ng data) and when the data is transmitted using the RS-232C interface.
39 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 us e time and da te with " Time/Date output ( 5-td )" .
40 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.
41 LAB-0 123 C R L F 2004/0 7/01 C R L F C R L F 12 : 34 : 56 CSV format 5if type 5 This format separates the data of A&D sta ndard 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 poi nt, the separators are set to semicolon ( ; ).
42 10.6. Data Format Examples Stable Unstable Overload Positive error Overload Negative error Space, ASCII 20h Carriage Return, ASCII 0Dh Line Feed, ASCII 0Ah C R C R L F C R L F C R L F L F C R L F C R L F C R L F H L F C R L F C R L F C R C R L F C R L F C R L L F g S 17 8 2g US -1 8 3 .
43 Units A&D D.P. KF MT g mg Counting mode Precent mode Ounce ( Avoir ) Troy Ounce Metric Carat Momme Pennyweight Grain Tael ( HK general, Singapo re ) Tael ( HK, jewelry ) Tael ( Taiwan ) Tael ( .
44 10.7. Clock and Calendar Function The balanc e is equipped with a clock and ca lendar function. When the "GLP output ( info )" parameter is set to " 1 " or " 2 " and t.
45 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.
46 11. ID Number and GLP Report The ID number is used t o iden tify the balance when Good Laboratory Practice (GLP) is used. The ID number is maintained in non-volati le memory even if the AC a dapter is removed.
47 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.
48 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 re lease the key. 2 CC is displayed and the balanc e is tested automatically. 3 The zero point i s measured and the weight value is di splayed for a few seconds.
49 Calibration report using an external weight Key operation 1 Press and hold the CAL key to display Cal out and re lease the key. 2 Cal 0 is displayed. 3 When updating the calibra tion mass value, press the RANGE key and proceed to step 4. When using preset calibration ma ss value, proc eed to step 5.
50 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 ta rget value, press the RANGE key and pr oceed to step 4.
51 ----------- A - & - D MODEL ----- GH-300 S/N ----- 01234567 ID ------ LAB-0123 DATE -- 2004/07/01 START TIME ---- 12:34:56 WT -- +123.4567 -- g WT -- +123.4612 -- g WT -- +123.4623 -- g WT -- +123.4634 -- g WT -- +123.4511 -- g WT -- +123.4534 -- g WT -- +123.
52 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.
53 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).
54 Automatic self calibration can not be used while the interval me mory 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.
55 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.
56 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 availa ble to be output at one time to a printer or personal computer.
57 13. Underhook The underhook can be used for magnetic mate rials or density meas urement. The built-in underhook is revealed by removing the ca p on the bottom of the balance. Use the underhook as shown below. Caution Do not apply excessive force to the underhook.
58 14. Density Measurement The balanc e 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.
59 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 sele ct the density mode.
60 Measuring the density N o te If the liquid temperature or the t ype of liquid is changed during measurement, input again the value of the liquid density as necessary. Density display is four decimal places. Minimum display ca n not change with the RANGE key.
61 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.
62 1 2 3 4 MODE ON 1 2 3 4 MODE ON 15.2. Connection to Peripheral Equipment Connection to an AD-8121B printer Preset the following parameters to use the AD-8121B pr inter.
63 Connection to a computer and the use of WinCT The balance is of the D CE 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.
64 15.3. Commands 15.3.1. Command List Note A command has a terminator added, that is specified using " 5if Crl f " 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.
65 15.3.2. Acknowledge Code and Error Codes When the "Serial interface function ( 5if )" parameter is set to " erCd 1 ", the balance outputs <AK> code or error code to each command as follows: <AK> (06h) Acknowledge in ASCII code.
66 15.3.5. Command Examples This example uses the " erCd 1 " of " 5if " so that the <AK> (06h) code is output. ON command (turning on the balance) Computer Time Balance ON co.
67 C AL command (Calibration with internal mass) Computer Time Balance CAL command Zero display 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.
68 Weighing with a tare This example uses " erCd 1 " of " 5if " so that the <AK> (06h) code is output. Computer Time Balance R command TR command S command ?PT command Sets t.
69 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 <AK> (06h) code is output.
70 16. Maintenance 16.1. Treatment of the Balance Clean the balance wit h 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 dis assemble the balance. Contact the local A&D dealer if the balance needs service or repair.
71 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.
72 Display Error code Description EC,E00 Communications error A protocol error occurred in communications. Confirm the format, baud rate and parity. EC,E01 Undefined command error An undefined command was received. Confirm the command. EC,E02 Not ready A received command can not be processed.
73 16.4. Checkin g the Balance Performance and Environment The balanc e is a precision instrument. When the operating environment or the operating method is inadequate, correct weighing can no t be performed. Place a sample on the pan and remove it, and repeat this several times.
74 17. Specifications GH-120 GH-200 GH-300 GH-202 GH-252 220 g 250 g Weighing capacity 120 g 220 g 320 g 51 g 101 g 220.0084 g 250.0084 g Maximum display 120.0084 g 220.0084 g 320.0084 g 51.00009 g 101.00009 g 0.1 mg Minimum display 0.1 mg 0.01 mg 0.1 mg Repeatability (Standard deviation) 0.
75 17.1. External Dimensions Unit: mm.
76 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.
77 AD-1653 Density Determination Kit Example Temperature Water density 0 °C 0.99984 g/cm 3 10 °C 0.99970 g/cm 3 20 °C 0.99820 g/cm 3 30 °C 0.99565 g/cm 3 AD-1683 DC Static Eliminator The eliminator is able to di ssipate static electricity on a charged sample.
78 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.
79 Other options Order code Name and description AD-1682 Rechargeable Battery This option allows use of the bal ance in a place where AC power is not available. AD-1684 Electrostatic field meter This option measures the amount of the static charge on the sample, tare or peripheral equi pment and displays the result.
80 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 da ta or unit weight is stored. Digit The minimum weighing value availa ble.
81 18.2. Index % Unit of percent mode ................... 20 CAL ke y ................................. 10, 31 MODE key ................................... 10 ON OFF key................................. 10 PRINT key.............................. 10, 31 RANGE key .
82 Numerical format ............................................. 40 Options ..................................................... 76 out Report output ......................... 55, 56 p5 Internal mass correction .............. 30 pnt Decimal point ..
83 MEMO.
84 MEMO.
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