31. INTRODUCTIONThis manual describes how this balance works and how to get the most out ofit in terms of performance.EJ series balances have the following features: The EJ series are high-resolution type electronic balances having a displayresolution of 1/12,000 ~ 1/60,000. The balance has a counting function, % function and a comparator function. The backlight LCD will help with use in a dimly lighted place. The balance can be operated with an AC adapter, or 4 x “AA” size dry-cellbatteries for cordless operation. The optional RS-232C serial interface can be connected with a printer or personalcomputer, and Good Laboratory Practice (GLP) data can be obtained. The optional USB interface is available to connect with a personal computereasily.2. UNPACKINGWhen unpacking, check whether all of the following items are included:Weighing pan Weighing panMain unit Main unitEJ-120 / EJ-200 / EJ-300 EJ-1500 / EJ-2000 / EJ-3000EJ-410 / EJ-610 EJ-4100 / EJ-6100Instruction Manual