Local Operation; Introduction - Chroma 63800 Series Operation & Programming Manual

3.

Local Operation

3.1

Introduction

Chroma 63800 series electronic loads are suitable for design, manufacturing, testing and
quality assurance. It contains a processor, GPIB and RS-232C connectors, front panel
keypad, display, and power stage. Its built-in remote control function allows you to control,
read back current, voltage and status. All of them can be saved in the load EEPROM for
future use.
The load contains cooling fans. The fan speed increases or decreases automatically when the
load power rises or falls. This feature reduces the overall noise level as the fans do not always
run at the maximum speed.
Each load can operate in constant load modes and Rectified load modes. If the application
requires a greater power or current capacity than one load can provide, you need to connect
the loads in parallel.
The AC load can be configured to operate in local or remote mode. The operation in remote
mode through a remote GPIB controller or RS-232C will be described in Chapter 5. In this
section the operation in local mode through the keypad on the front panel and testing will be
described. The AC load is configured for local operation when it is turned on.
There are two kinds of load simulation for the 63800: AC Load Simulation and DC Load
Simulation. The operation is shown as below.
AC Load Simulation
Constant Load Modes
CC Mode
CR Mode
CP Mode
Model 63800
Rectified Load Modes
RLC Mode
CP Mode
Inrush Mode
Figure 3-1 Operation Structure
Local Operation
DC Load Simulation
CC Mode
CR Mode
CP Mode
CV Mode
Rectified Mode
3-1