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Figure 3-11. burn-in sequence example -31 – AMETEK SGI Series User Manual

Page 83

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Sorensen SGI Series

Calibration and Verification

M550221-01 Rev AA

3-31

Resume key to continue the sequence or the Stop key to
end the sequence.

S

EQUENCING

E

XAMPLE

The following provides an example of programming and running a test
sequence.

A typical burn-in sequence requires the voltage to the device-under-test
(DUT) to ramp up to a nominal voltage, allow the unit to soak at that voltage
for a period of time, then ‘bump’ up that voltage to another level, soak, etc.,
then return the output back to zero. In some cases, an on/off power cycle
sequence may also be required. Figure 3-11 provides a graphical
representation of this example burn-in sequence.

Figure 3-11. Burn-in Sequence Example

To begin programming a sequence it is important to know the exact settings for
each step of the sequence. In this case, two sequences will be programmed:
the first being the up/down ramp sequence, and the second the on/off
sequence. The two will be strung together using a Goto command.

The example sequence will perform the following:

Sequence 1

– Up/Down Ramp

Step 1

– Ramp the output voltage from 0 V to 20 V over a 1 s period

Step 2

– Hold the voltage at 20 V for 2 s

Step 3

– Ramp the voltage from 20 V to 40 V over a 500 ms period

Step 4

– Hold the voltage at 40 V for 2.5 s

Step 5

– Ramp the voltage from 40 V to 0 V over a 2 s period

Step 6

– Hold the voltage at 0 V for 2 s

Step 7

– Go to sequence 2

Burn-in Sequence

0

5

10

15

20

25

30

Tim e in seconds

O

u

tp

u

t

V

o

lt

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