Array electronic 3720A, Manual

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Chapter1 General Introduction
ARRAY 372x Series programmable electronic load ， as a new generation of product developed by
ARRAY Electronic Co., Ltd., is designed with high performance. It provides you powerful test
function, user-friendly HMI, as well as RS232, USB, GPIB interfaces to support SCPI and Labview.
372x Series is widely used in scientific research and production fields such as aerospace, shipbuilding,
automotive electronics, solar cell, and fuel cell.
All “electronic load” and “load” appear in this manual refer to ARRAY 372x Series Electronic
Load if there is no special explanation.
1.1 Function Features
Main functions and features of ARRAY372x Series:
 4 basic test functions: CC,CV, CR, and CP; 8 basic operating modes: CCL, CCH, CV, CRL,
CRM, CRH, CPV, CPC;
 The 24 bits A/D and 17 bits D/A converters incorporated, provide this equipment with
greatly enhanced setting and measurement resolution. 100kHz D/A conversion rate fully
improves high-speed performance;
 Minimum operating voltage is less than 0.6V at the load’s full rated current (3720/3721).
With optional low-voltage testing devices, the maximum current can be achieved even
though the input voltage is 0V. This is especially suitable for fuel cell, solar cell and other
new energy test applications;

Perfect protection assures high reliability in the most complicated test environments;
 Innovative design of CPV and CPC modes effectively improves the practicability of CP
mode;
 Circuit improvement greatly enhances the dynamic response of CR mode and widens the
application scope of that mode;
 High-speed transient operation with a maximum test frequency of 50kHz:
 Powerful sequential test function; with a minimum step time of 10us; and a maximum step
time of 10000s. Cyclic numbers can be adjusted freely and a sequence can be chained to
another sequence to achieve even more complex test procedures;
 The input binding posts with their innovative design are especially suitable for large current
testing;
 Provides short-circuit test, battery discharge test and other auxiliary functions;
 A high-efficiency, intelligent cooling system can effectively reduce system temperature and
enhance power density;
 Automatic ON/OFF function simplifies test operation;
 Knobs and digital keypad makes the operation more convenient;
 Save/recall function can save multiple groups of general settings;
 Supports SCPI (Standard Commands for Programmable Instrumentation) and Labview, and
provides necessary PC software;