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A&D EJ-123 Instruction Manual

Compact precision balance
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1WMPD4002746B

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Summary of Contents for A&D EJ-123

  • Page 1 1WMPD4002746B...
  • Page 2 This Manual and Marks All safety messages are identified by the following, “WARNING” or “CAUTION”, of ANSI Z535.4 (American National Standard Institute: Product Safety Signs and Labels). The meanings are as follows: A potentially hazardous situation, which if not avoided, could result WARNING in death or serious injury.

  • Page 3: Table Of Contents

    CONTENTS 1. INTRODUCTION ........................3 2. UNPACKING...........................3 3. PART NAMES AND FUNCTIONS ..................4 4. SETTING UP ..........................6 4.1. Setting Up Your Balance....................6 4.2. Power Source .......................7 4.3. Breeze Break ........................8 5. OPERATION...........................9 5.1. Turn The Power ON And OFF..................9 5.2. LCD Backlight .......................9 5.3.
  • Page 4 12. SPECIFICATIONS........................37 12.1. Generals ........................37 12.2. Weighing Units......................37 12.3. Options ........................38 12.4. Dimensions......................38 13. GRAVITY ACCELERATION MAP ..................39...

  • Page 5: Introduction

    This manual describes how this balance works and how to get the most out of it in terms of performance. The EJ-123 and EJ-303 compact precision balance has the following features: The balance is high-resolution type electronic balance having a display resolution of 1/120,000 to 1/300,000.

  • Page 6: Part Names And Functions

    3. PART NAMES AND FUNCTIONS Total indicator Measurement in air for specific gravity M+ indicator Measurement in water ACAI indicator for specific gravity Battery indicator Density (Specific gravity) Hold indicator STABLE indicator STABLE Weighing units NET indicator ZERO ZERO indicator Wind shield cap (Accessory) Breeze break...
  • Page 7 Turns the power ON or OFF. Switches the weighing units and modes. Clears the display to zero (combined zero and tare). Held down to enter the function setting mode. pcs mode: Enters the sample unit weight storing mode. % mode: Enters the 100% weight storing mode.

  • Page 8: Setting Up

    4. SETTING UP 4.1. Setting Up Your Balance 1. Place the weighing pan on the main unit. 2. Adjust the level of the balance using the leveling feet. Use the spirit level to confirm. The bubble should be in the center of the circle. 3.

  • Page 9: Power Source

    4.2. Power Source For the power source, the AC adapter or 4 x “AA” size dry-cell batteries can be used. When Using The AC Adapter Use a stable power source. To use the AC adapter, insert the AC adapter plug into the AC adapter jack AC adapter jack on the rear side of the balance.

  • Page 10: Breeze Break

    4.3. Breeze Break The breeze break can prevent a measurement error due to a (disturbing) wind. Wipe it with a dry lint free cloth or a lint free cloth which is moistened with warm water. To keep the antistatic treatment, do not use alcohols and solvents to clean the balance. When an antistatic treatment becomes weak, apply an antistatic agent to the clear plastic parts.

  • Page 11: Operation

    5. OPERATION 5.1. Turn The Power ON And OFF 1. Press the ON:OFF key to turn the power ON. STABLE Weighing units ZERO All of the symbols are displayed as shown above. (About units: Only the available units will be displayed.) When the scale is operating using dry-cell batteries, the scale performs count a down using the under-bar on the display.

  • Page 12: Units

    5.3. Units The most common unit of weight used around the world is the gram, but there is often a need to shift to alternative units specific to the country where the balance is used or to select modes such as counting or percent. The units and the order they appear in the display are as follows: Ounce (avoir) Troy ounce...

  • Page 13: Basic Operation

    5.5. Basic Operation 1. Select a weighing unit. Container 2. When the display does not show zero, press the RE-ZERO key to set the display to zero. Weighing pan 3. When using a tare (container), place the container on the weighing pan, and press the RE-ZERO key to subtract the tare weight.

  • Page 14: Counting Mode (Pcs)

    5.7. Counting Mode (pcs) The balance weighs the sample pieces and calculates the unit weight. Using the sample unit weight, the scale counts the number of items in the sample. As for the minimum unit weight acceptable, see the function setting “Umin”. Selecting The Counting Mode 1.

  • Page 15: Percent Mode (%)

    10. Counting accuracy is improved when the ACAI indicator turns off. Each time the above operation is performed, a more accurate unit weight will be obtained. There is no definite upper limit of ACAI range for the number of samples exceeding 100. Try to add a similar number of samples as that displayed.

  • Page 16: Accumulation Function

    6. ACCUMULATION FUNCTION This function counts the number of times articles are weighed, calculates the total mass value and can display the number (accumulation count) and accumulated mass value. Preset the item "Hold" of the function list to use the accumulation function. The accumulation count and accumulated mass value are stored in the scale even if the power is removed.
  • Page 17 Operations Selecting A Weighing Unit 1. Select a unit to be used in the accumulation function with pressing the UNITS key. 0. 0 00 ZERO The unit can not change after storing the accumulation data. If changing the unit, reset Unit the current accumulation data, change the unit.

  • Page 18: Calibration

    7. CALIBRATION This function adjusts the balance for accurate weighing. Perform calibration in the following cases. When the balance is first used. When the balance has been moved. For regular calibration. Calibration (CAL) switch Calibration (CAL) switch cover 7.1. Calibration Using A Weight Prepare a calibration weight (sold separately) in advance.

  • Page 19: Gravity Acceleration Correction

    is displayed. Remove the weight from the pan. To store When the GLP output (function setting “info 1” or 100. 0 00 “info 2”) is selected, glp is displayed. The calibration report is output and end displayed again. Then the balance will be turned off. 0end000 Note GLP output...

  • Page 20: Functions

    8. FUNCTIONS 8.1. Key Operation The ON:OFF key to cancel the operation and turns the balance off. Item key to select a class and an item. In the weighing mode, press and hold the key to enter the function setting mode. The enter key to proceed to the selected class and store the setting per class and goes to the next class.

  • Page 21: Setting Example

    8.3. Setting Example To set auto power-off function to “Enabled”, and the ACAI function to “Disabled”. Press and hold 1. Press and hold the SAMPLE key to display func func 2. Press the PRINT key. The balance displays poff 0 . poff 0 3.

  • Page 22: Storing Weighing Units

    8.4. Storing Weighing Units It is possible to store the weighing units that will actually be used from the units available. For the units available, see “5.3. Units”. Select and store the weighing units as described below: Press and hold 1.

  • Page 23: Function List

    8.5. Function List Param- Class Item Description eter  0 Auto power-off disabled poff Automatically power off Auto power-off 1 Auto power-off enabled 0 Fast / sensitive Cond  1 Software filtering Response 2 Slow / stable The STABLE indicator is 0 Judge precisely (±...
  • Page 24 Param- Class Item Description eter  0 Water temperature ldin The way to input liquid density. Liquid density input Liquid density  0 Not used d = digit : in unit of minimum display Hold: When a stable value leaves Hold.

  • Page 25: Options

    9.1. EJ-02 USB Interface The EJ-02 allows an EJ-123/EJ-303 balance to be connected with a printer or a personal computer with the USB interface. The EJ-02 can transmit the weight value (numerical value only) uni-directionally to a personal computer via USB.

  • Page 26: Rs-232C Serial Interface

    9.2. EJ-03 RS-232C Serial Interface The EJ-03 allows an EJ-123/EJ-303 balance to be connected with a printer or a personal computer with the RS-232C interface. The RS-232C serial interface has the following four modes. Stream mode Outputs data continuously....

  • Page 27: Data Format

    Pin Connections D-Sub 9 pin male connector N.C. Transmit data Receive data N.C. Signal ground Data set ready Request to send Clear to send N.C. Inside of the balance The interface is designated as DCE (Data Communication Equipment). 9.3. Data Format Header Data Unit...
  • Page 28 Data Output Mode Stream mode Set the function to “prt 0”. The balance outputs the current display data. The data-update rate is approximately 10 times per second. This rate is the same as the display-update. The balance does not output data while it is in the setting mode. Key mode Set the function to “prt 1, 2 or 3”.

  • Page 29: Density Determination Kit

    9.4. EJ-13 Density Determination Kit Using this option and calculation program, Breeze break the balance can determine the density Weighing pan (specific gravity) of a sample. EJ-13 Installation Remove the weighing pan and the fixing frame. Install the beaker stand on the balance and attach the pan stand to the pan Fixing frame support of the balance.
  • Page 30 Entering the density of a liquid (ldin = 0) SG indicator 1. Press the UNITS key to select SG . 2. Press and hold the UNITS key to display the liquid 0. 0 00 density input mode. The display will show the water temperature currently set (factory setting: 25 °C).
  • Page 31 Example of density measurement Selecting the density measurement mode Measuring weight in air. 1. Press the UNITS key to select SG . SG indicator The weighing unit is “g”. The display shows that blinks and the 0. 0 00 balance is measuring the weight in air. When the display does not show zero, press the RE-ZERO key to set the display to zero.

  • Page 32: Id Number And Glp

    10. ID NUMBER AND GLP The ID number is used to identify the balance when Good Laboratory Practice (GLP) is used. The ID number is stored 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 serial interface.

  • Page 33: Glp Report

    The balance is turned off. The balance is turned off. AD-8121 format “info 1” General format “info 2” Manufacturer ~~~~~~~~~~~ ___________A_&_D & <CRLF> Model MODEL_____EJ-123 MODEL~~~~~EJ-123<CRLF> Serial number S/N~~~~Q12345678<CRLF> S/N____Q12345678 ID number ID~~~~~~~~ABCDEF<CRLF> ID________ABCDEF DATE<CRLF> Date DATE__2013/11/14 <CRLF> Time TIME____02:53:21 TIME<CRLF>...
  • Page 34 Calibration Test Report The calibration test mode is used to compare a calibration test weight with the calibration test data weighed by the balance. This test does not perform calibration and this mode is available even after sealing the calibration (CAL) switch. Press and hold both keys.
  • Page 35 AD-8121 format “info 1” General format “info 2” Manufacturer ~~~~~~~~~~~ ___________A_&_D & <CRLF> Model MODEL_____EJ-123 MODEL~~~~~EJ-123<CRLF> Serial number S/N~~~~Q12345678<CRLF> S/N____Q12345678 ID number ID~~~~~~~~ABCDEF<CRLF> ID________ABCDEF DATE<CRLF> Date DATE__2013/11/14 <CRLF> Time TIME____02:53:21 TIME<CRLF> Calibration test type CAL.TEST(EXT.) <CRLF> ACTUAL CAL.TEST(EXT.)<CRLF> Zero value ________0.000__g...
  • Page 36 The balance return to the weighing mode. AD-8121 format “info 1” General format “info 2” Title block Manufacturer ~~~~~~~~~~~ ___________A_&_D & <CRLF> Model MODEL_____EJ-123 MODEL~~~~~EJ-123<CRLF> Serial number S/N~~~~Q12345678<CRLF> S/N____Q12345678 ID number ID~~~~~~~~ABCDEF<CRLF> ID_______ABCDEF DATE<CRLF> Date DATE__2013/11/14 <CRLF> Start time START START<CRLF>...

  • Page 37: Maintenance

    11. MAINTENANCE 11.1. Notes On Maintenance Do not disassemble the balance. Contact your local A&D dealer if your balance needs service or repair. Please use the original package for transportation. Do not use organic solvents to clean the balance. Use a lint free cloth dampened with warm water and a mild detergent.
  • Page 38 Note: Pressing the PRINT key without adding 50 - samples may reduce the counting accuracy. 100 - Starting from the 100 samples, may be displayed when the sample weight is light. In this case, press the PRINT key without adding any 100 - samples.

  • Page 39: Specifications

    12. SPECIFICATIONS 12.1. Generals MODEL EJ-123 EJ-303 Weight capacity 120 g 310 g Minimum display “d” = digit 0.001 g 0.001 g Repeatability (Standard deviation) 0.003 g 0.003 g Linearity ±0.003 g ±0.003 g Sensitivity drift ±20 ppm / °C (10 °C to 30 °C / 50 °F to 86 °F) No.

  • Page 40: Options

    12.3. Options EJ-02 USB interface EJ-03 RS-232C serial interface EJ-13 Density determination kit 12.4. Dimensions Unit: mm 110 ○ Minimum...

  • Page 41: Gravity Acceleration Map

    13. GRAVITY ACCELERATION MAP Values Of Gravity At Various Locations Amsterdam 9.813 m/s Manila 9.784 m/s Athens 9.807 m/s Melbourne 9.800 m/s Auckland NZ 9.799 m/s Mexico City 9.779 m/s Bangkok 9.783 m/s Milan 9.806 m/s Birmingham 9.813 m/s New York 9.802 m/s Brussels 9.811 m/s...
  • Page 42 World Map...
  • Page 44 3-23-14 Higashi-Ikebukuro, Toshima-ku, Tokyo 170-0013, JAPAN Telephone: [81] (3) 5391-6132 Fax: [81] (3) 5391-6148 A&D ENGINEERING, INC. 1756 Automation Parkway, San Jose, California 95131, U.S.A. Telephone: [1] (408) 263-5333 Fax: [1] (408)263-0119 A&D INSTRUMENTS LIMITED Unit 24/26 Blacklands Way, Abingdon Business Park, Abingdon, Oxfordshire OX14 1DY United Kingdom Telephone: [44] (1235) 550420 Fax: [44] (1235) 550485 A&D AUSTRALASIA PTY LTD...

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