Sequence Looping Makes SGX Series Ideal for Repetitive Testing

Posted by Grady Keeton on Dec 23, 2019 2:00:00 PM

The Sorensen SGX Series combines onboard intelligent controls with the outstanding power electronics common to all SG family supplies. These controls enable sophisticated sequencing, constant power mode and save/recall of instrument settings. The ability to program sequences and loop through them makes the SGX ideal for repetitive testing.

The sequencing function allows you to set up the supply to automatically run a series of voltage, current and power mode operations. This is especially useful for setting up the supply to test to compliance standards or unburdening the test computer in automated testing applications.

Via the SGX's RS-232, IEEE-488 or Ethernet interfaces, an external computer can trigger the sequences. Up to 50 sequences may be stored, with each sequence containing up to 20 individual steps. With the ability to string sequences together and an extensive list of step functions such as ramping, looping, go to and subroutine calls, the user can define a nearly infinite variety of test sequences.

When creating test sequences, use the following guidelines to prevent damage to the unit:

  • Estimate the AC frequency and peak-to-peak voltage, V(PK-PK) of the desired test sequence.
  • Convert the estimated V(PK-PK) to a % of maximum output voltage (e.g., if V(PKPK) is 10V and maximum voltage of the supply is 100V, then %V(PK-PK) = 10%).

Verify that the frequency and %V(PK-PK) do not exceed the values below:


Another consideration is the actual rise and fall capabilities of the output of the supply. Although damage will not occur, the shape of the output waveform will be affected by the rise/fall times in relation to programmed sequence settings. These vary widely depending on the load conditions, so contact us if the output waveform is critical in your application. Also contact us for detailed information if the desired waveform exceeds the recommended limits in the table.

Also, note that there are some guidelines to follow when programming sequences. For example, you cannot use non-sequence related SCPI commands while performing sequence operations, nor can you use sequence SCPI commands as stand-alone commands outside a sequence.

For more information on the SGX Series or any of AMETEK’s programmable power supplies and programmable loads, contact an authorized AMETEK Programmable Power sales representative by visiting AMETEK Programmable Power also can be contacted directly toll free at 800-733-5427 or 858-450-0085 or at

Topics: Sorensen SGX Series, Sequence Looping

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