Operation Overview
3. Operation Overview
3.1 Introduction
Chroma 63600-5, 63601-5 multiple electronic load mainframes are suitable for design,
manufacturing, testing and quality assurance for electronic products. The Mainframe
contains five slots of load modules. Each Load module occupies one slot depending on the
power rating of the module.
The Mainframe 63600-5, 63601-5 can dissipate up to 2,000 watts when it is full loaded. It
contains a processor, two System Bus ports, a USB port, a GPIB card (optional), an Ethernet
card (optional), front panel keypad and display, and PASS/FAIL signals. The built-in remote
control function enables you to control and read back the current, voltage and status. The
SYNC function on the Mainframe synchronizes each module when the module current/
voltage level changes. The Save/Recall feature allows you to save up to 100 files, 10
programs, and one default setting. All of them can be saved in module EEPROM for future
use.
The Model 63601-5 only provides commands for save and recall
functions with no support of manual operation.
The Load Module has one cooling fan. The fan speed automatically increases or decreases
when the module power rises or falls. This feature reduces overall noise level as the fans do
not always run at maximum speed.
Each module can operate independently in constant current (CC), constant resistance (CR),
constant voltage (CV), constant power (CP), and constant impedance (CZ)…etc. An
individual module may have one or two channels. Each of them has its own channel number
with its own input connectors, and can be turned on/off or short-circuited independently. If
your application requires a greater power or current capacity than one module can provide,
you have to connect load modules in parallel in CC, CR, or CP mode.
Each load module can be controlled any remotely via GPIB / Ethernet / USB / System Bus
interface. Once a channel is selected or addressed, all subsequent commands go to that
channel till another channel is selected or addressed. The operation of all modules in the
Mainframe is similar in spite of power ratings; meanwhile each module has a keypad to
control itself.
Each module operates independently in CC, CR, CV, CP, or CZ mode as a load and
simultaneously measures current, voltage, or power level. The user is allowed to off-line edit
above mentioned parameters. Beside, in any of the operation modes, when active, the on-
line change of parameters changes the Electronic Loading accordingly, thus making it easy
to achieve an optimized test condition and then saved for later use.
The module allows the user to enter specification of a UUT including V and I for later GO/NG
check. In addition, the real time measurement bar on the VFD display indicates the degree of
deviation from specification and guides the users in adjusting to fulfill spec.
This chapter covers the interpretation of the front and rear panel description, the initial setup,
and the operation of static load under different operating modes including CC, CR, CV, CP
and CZ, and CC dynamic load.
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