Instruction/ maintenance manual of the product EJ-120 A&D
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1WMPD4001917.
This manual and Marks All safety messages are identified by the following, “W ARNING” or “CAUTION”, of ANSI Z535.4 (American National S t andard Institute: Product Safety Signs and Labels). The meanings are as follows: WA R N I N G A potentially hazardous sit uation which, if not avoide d, could result in death or serious injury .
1 CONTENTS 1. INTRO DUCTION ............................................................................................................. 3 2. UNP ACK ING ................................................................................................
2 1 1. MAINTE NANCE .......................................................................................................... 34 1 1-1. Notes on maintena nce ............................................................................................
3 1. INTRODUCTION This manual describes how this balance works and how to get the most out of it in terms of performance. EJ series balances have the following features: The EJ series are high-resolution ty pe electronic balances having a display resolution of 1/12,000 ~ 1/60,000.
4 3. P ART NAMES AND FUNCTIONS T urns the power on or off. Held down to enter the function setting mode. pcs mode: Enters the sample unit weight storing mode. % mode: Enters the 100% weight storing mode. Clears the display to zero (combined zero and tare).
5 4. SETTING UP 4-1. Setting up your balance 1. Place the weighing pan on the main unit as shown in “2. UNP ACKING”. 2. Adjust the level of the balance using the le veling feet. Use the spirit level to confirm. The bubble should be in the center of the circle.
6 Remove batteries when the balance is not to be used for a long time. They may leak and cause damage to the balance. Damage due to battery leakage is not covered by the warranty . Inst alling batteries 1. T urn of f the balance and disco nnect the AC adapter if used.
7 5. OPERA TION 5-1. T urn the power ON and OFF 1. Press the ON:OFF key to turn the power ON. All of the symbols are disp layed as shown above. (About units: Only the unit s available will be displayed.) The display turns off except for a weighing unit and the decimal point.
8 5-3. Unit s The most common unit of weight used around t he world is the gram, but there is often a need to shift to alternative unit s specific to the country where the balance is used or to select modes such as counting or percent.
9 5-4. Selecting a weighing unit Press the UNITS key to select a unit. The following sections are a description of the three common units: g (gram mode), pcs (counting mode), and % (percent mode). 5-5. Basic operation 1. Select a weighing unit. 2. When the display does not show zero, press the RE-ZERO key to set the display to zero.
10 5-6. Counting mode (pcs) Weighs the sample pieces and calculate it s unit weight. Using the sample unit weight, the scale counts the number of p arts or items. As for the minimum unit weight a ccept able, see the function setting “ Umin ”. Selecting the counting mode 1.
11 9. The balance re-calculates the unit weight wh ile the ACAI indicator is blinking. Do not touch the balance or samples on the pan until the ACAI indicator turns off. 10. Counting accuracy is impr oved when the ACAI indic ator turns off. Each ti me the above operation is performed, a more accura te unit weight will be obtained.
12 6. COMP ARA T OR The results of the comp arison are indica ted by HI, OK or LO on the display . The comparison is as follows: LO < Lower limit value ≤ OK ≤ Upper limit value < HI Operating conditions (see the function setting “ Cp ”): No comparison (comp arator function disabled).
13 Entering the upper and lower limit values 6. With Cp Hi displayed, press the PRINT key . Enter the upper limit value using the following keys. SAMPLE key T o select the digit blinking to change. RE-ZERO key T o set the value of the digit selected. Hold down the key to switch the sign “+” and “-“.
14 7. CALIBRA TION This function adjusts the bal ance for accurate weighing. Perform a calibration in the following cases. When the balance is first used. When the balance has been moved. For regular calibration. 7-1. Calibration using a weight Prepare the calibration weight (sold sep arately) in advance.
15 5. At step 3, pressing the PRINT key to weigh the zero-point value. Do not touch the pan during weighing. 6. Place the calibration wei ght with the same value as displayed on the pan. Press the PRINT key to weigh it. Do not touch the pan during weighing.
16 7-2. Gravity acceleration correction When the balance is first used or has been mov ed to a different place, it should be calibrated using a calibration weight. But if the calibration weight cannot be prepar ed, the gravity acceleration correction will compensate the balance.
17 8. FUNCTIONS 8-1. Key operation Cancels the operation and turns off the balance. Item key Selects a class and an item. In the weighing mode, press and hold the key to enter the function setting mode. Enter key Proceeds to the selected class. S tores the settings per class and goes to the next class.
18 8-3. Setting example T o set auto power-off function to “Enabl ed”, and the ACAI function to “Disabled”. 1. Press and hold the SAMPLE key to display func . 2. Press the PRINT key . The balance displays poff 0 . 3. Press the RE-ZERO key to display poff 1 .
19 8-4. S toring weighing unit s It is possible to store the weighing units that will be actually used from the units available. For the units available, see “5-3. Unit s”. Select and store the weighi ng units as described below: 1. Press and hold the SAMPLE key to display func .
20 8-5. Function list Class Item Param- eter Description 0 Auto power-off disabled poff Auto power-off 1 Auto power-off enabled Automatically power off 0 Fast / sensitive 1 2 3 Cond Response 4 Slow / stable Software filtering 0 S table when within ± 0.
21 Class Item Param- eter Description 0 ACAI disabled aCai ACAI function 1 ACAI enabled If “ 0 ” is set, no additional samples required. 0 1 d 1 1/10 d Umin Minimum unit weight 2 total sam.
22 9. OPTIONS The following options are available for the EJ series: EJ-02 USB interface EJ-03 RS-232C serial interface EJ-07 Underhook for EJ-3000 / EJ-4100 / EJ-6100 EJ-08 Underhook .
23 4. Secure the EJ-02 with the screws supplied with the EJ-03. Connector inside the option slot. Interface specifications T ransmission system EIA RS-232C T ransmission form Asynchronous, bi-directio.
24 Data form at S T , + 0 0000 . 00 g C R L F Header Data Unit T erminator There are four types of headers: ST : S table weighing data (including % dat a) QT : S table counting data US : Unstable weighing dat a (including count and %) OL : Out of weighing range (Over) The data is normally 9 digits including a decimal point and a sign.
25 Key mode Set the function “ prt 1 , 2 or 3 ”. When the PRINT key is pressed while t he weighing data is stable (the ST ABLE indicator is on), the balance transmits the data. When the dat a is transmitted, the display will blink one time. Auto-print mode A Set the function “ prt 2 ”.
26 9-3. EJ-07 / EJ-08 Underhook By attaching the underhook to t he bottom of the balance, large objects that are dif ficult to load on the weighing pan can be weighed, and the density (specific gravity) of objects may be measured. Refer to the “9 -6.
27 9-6. EJ-13 Density Determination Kit Using this option and calculation program, the balance can determine the density (specific gravity) of a sample. EJ-13 Installation Push the fixing frame out, and remove the weighing pan. Att ach the beaker stand to the balance and fit the pan st and to the pan support of the balance.
28 Change the function table Selecting a way to set the density of a liquid Select the liquid density input method from the function table below . The function table is available only when the density measurement mode is selected.
29 2. Place a sample on the upper pan. 3. W ait for the ST ABLE indic ator to be displayed and press the SAMPLE key to store the weight in air . 4. The display shows that LO blinks and the balance start s to measure weight in water . 5. Place the sample on the lower pan in water .
30 10. ID NUMBER AND GLP The ID number is used to identify th e balance when Good Laboratory Practice (GLP) is used. The ID number is held in memory even if power to the balance is switched off. The following GLP data is transmitted to a printer or a computer using the optional RS-232C interface.
31 10-2. Output example T o print the GLP report, set the function “ info 1 ” and use MODE 3 of the printer AD-8121B. T o output the GLP report to a per sonal computer , set the function “ info 2 ”. Dat a format for “calibration report” Perform calibration using a weight.
32 “Title bloc k” and “End block” When a weight value is recorded as the GL P dat a, “Title block” and “End block” are added at a group of weight values in the GLP report. T o output the GLP report to the printer AD-8121B , use MODE 3 of it.
33 2. CC 0 is displayed. 3. If necessary to change the weight value to check, press the SAMPLE key and change the weight value using the following keys. SAMPLE key T o select the digit blinking to change. RE-ZERO key T o set the value of the digit selected.
34 1 1. MAINTENANCE 1 1-1. Notes on maintenance Do not disassemble the balance. Cont act your local A&D dealer if your balance needs service or repair . Please use the original package for transport ation. Do not use organic solvents to clean the balance.
35 the unit weight. Note: Pressing the PRINT key without adding samples may reduce counting accuracy . St arting from the 100 samples, 100 - may be displayed when the sample weight is light. This is for your notice and press the PRINT key without adding any samples.
36 12. SPECIFICA TIONS 12-1. EJ series MODEL EJ-120 EJ-200 EJ -300 EJ-410 EJ-610 Weight cap acity 120 g 210 g 310 g 410 g 610 g Min. display “d” 0.01 g 0.01 g 0.01 g 0.01 g 0.01 g Repeatability (S td. deviation) 0.01 g 0.01 g 0.01 g 0.01 g 0.01 g Linearity ±0.
37 12-2. Other weighing unit s M O D E L EJ-120 EJ-200 EJ-300 EJ-410 EJ-610 C a p a c i t y 4.233 7.408 10.935 14.462 21. 517 oz. M i n . d i s p l a y 0.001 0. 001 0.001 0. 001 0.001 C a p a c i t y 0.2646 0.4630 0.6834 0.9039 1.3448 lb M i n . d i s p l a y 0.
38 12-3. Options EJ-02 USB interface EJ-03 RS-232C interface EJ-07 Underhook for EJ-3000 / EJ-4100 / EJ-6100 EJ-08 Underhook for EJ-1500 / EJ-2000 EJ-1 1 Breeze break EJ-12 Carrying case EJ-13 Density Determination Kit for EJ- 120 / EJ-200 / EJ-300 / EJ-410 / E J-610 12-4.
39 GRA V ITY ACCELERA TION MAP V alues of gravity at various locations Amsterdam 9.813 m/s 2 Manila 9.784 m/s 2 Athens 9.807 m/s 2 Melbourne 9.800 m/s 2 Auckland NZ 9.799 m/s 2 Mexico City 9.779 m/s 2 Bangkok 9.783 m/s 2 Milan 9.806 m/s 2 Birmingham 9.
40 W orld map.
An important point after buying a device A&D EJ-120 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought A&D EJ-120 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data A&D EJ-120 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A&D EJ-120 you will learn all the available features of the product, as well as information on its operation. The information that you get A&D EJ-120 will certainly help you make a decision on the purchase.
If you already are a holder of A&D EJ-120, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime A&D EJ-120.
However, one of the most important roles played by the user manual is to help in solving problems with A&D EJ-120. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A&D EJ-120 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
