Sequoia / Tahoe Series User Manual California Instruments
80 M447352-01 REV-A
WARNING!
In the three-phase mode of opertaion, Neutral connection is mandatory. Neutral from the
output of UUT must be connected to the output neutral of the Sequoia.
4.1.3.1 eLoad Phase Modes
On Sequoia models operating in three-phase mode, the regulation mechanisms are implemented on a
phase-by-phase basis. This means that these parameters can be different for each phase. To set all
parameters to the same value for all three phases, use the individual PHASE button on the front panel to
select the individual phase A, B, and C of the front panel display. This will allow you to set these values for
all three phases. To set values by individual phase.
In the three-phase mode of operation, Sequoia requires a STAR-connected source as UUT. Neutral from
the output of UUT must be connected to the output neutral of the Sequoia. Refer to the Figure 4-3.
4.1.3.2 Basic Output Programming
For basic operation, the Sequoia requires the selection of the operating mode, output phase number (1-
Phase or 3-Phase), output voltage mode (AC or DC), voltage range (Low-Range or High-Range), the
configuration of the sync parameters (sync voltage, sync frequency, and sync phase sequence),
Synchronization and adjustment of the load parameters based on programming mode selected (Current
and phase shift for current programming mode, Active and reactive power for the power programming
mode, and R, L, and C for the Parallel RLC Programming mode).
This could be accomplished through the front panel display by navigating to the appropriate menu, entering
the desired values, performing the synchronization, and enabling the output; alternately, the remote digital
interface could be used with SCPI commands (refer to the Sequoia Series Programming Manual P/N
M447353-01) or the Sequoia Virtual Panels GUI; refer to AMETEK PPD website,
www.programmablepower.com, to download the latest version.
4.1.3.3 Basic Functional Test
Steps to be followed
1. Electrical Connection: Connect the UUT output to the SEQUOIA output as shown in Figure 4-3.
2. Select the Operating Mode.
3. Configure the Sync settings and turn on the UUT output.
4. Synchronize Sequoia Output to UUT output using steps given in Section 4.1.3.4.
5. Program load parameters for the selected Operating mode.
6. Turn ON the Output of the Sequoia.
4.1.3.4 Synchronization
To use the Sequoia in eLoad operating mode; the voltage, frequency, and phase sequence of Sequoia
and UUT must be synchronized for the AC mode of operation and only voltage to be synchronized in the
DC mode of operation.
Steps to perform the AC mode Synchronization:
1. Connect UUT output to the output of the sequoia.
2. Power up UUT followed by the Sequoia.
3. Verify the operating mode of the Sequoia is set to eLoad mode from the banner screen of the front
panel display during the bootup, refer to the below image.
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