High Power DC Electronic Load 63200 Series Operation & Programming Manual
Recommended safety precautions:
Ensure wiring, external circuit elements, etc are sized to the maximum rating of the LOAD
even if intended UUTs are smaller. This provides protection in the event that users
inadvertently apply full rated voltage, current or power or larger UUTs are tested in the future.
The user should take into account the power dissipated in the output cable under worse case
conditions to ensure the wire the gauge and cooling is adequate.
Ensure the load always receives adequate ambient cooling air at all times and air filters,
ducks, etc are maintained regularly. If loads are used with a cabinet, precautions should be
taken to minimize heating within the cabinet.
If the UUT may be damaged or an unsafe condition may occur in the event of a load short
circuit (e.g. certain types of batteries), or if there is no means of de-energizing the UUT in the
event of a load failure, the user may consider to include a suitably rated circuit breaker, fuse
or other means of disconnecting the load from the UUT under emergency conditions.
If there are any questions regarding safe operation of the equipment or adding
external protection circuits, please contact Chroma’s service personnel.
2.4.2 Remote Sensing Connections
There are two sensing points for the Electronic Load. One is measurement at Load
terminal, and another is measurement at Vsense. The Load will automatically switch to
Vsense when Vsense terminals are connected to UUT, otherwise it will measure at Load
terminals. Remote sensing compensates for voltage drop in applications that require long
lead lengths. It is useful when the load is operating in CV or CR mode, or when it needs
precise measurement. Figure 2-2 also illustrates a typical setup for remote sensing
operation.
The potential of V-sense red connector must be higher than that of
V-sense black connector.
Due the nature of load, the associate internal designs are shared for use.
Follow the precautions listed below for operation.
1. The internal resistance of each Electronic Load is different and
varied when connecting to a UUT. Use a professional digital power
meter if more accurate voltage measurement is required.
2. Use the load UUT Vsense or Local terminal to do voltage
measurement. Connect the negative ends is suggested to avoid
any possible loop current that may affect the measurement result.
3. Contact Chroma technical service center if there is a need to use the
UUT voltage measurement function as a power meter.
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