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FIGURE 40
When we talk about test pressure, we talk about two possible values—
Preset Test Pressure is the pressure that was set using the pressure
regulator on the rear panel. The pressure value is the “ideal” or target test
pressure. Figure 39.
Actual Test Pressure is the pressure the product is subjected to during a
test (black curve in figure 40). The actual pressure could be different from
the preset test pressure due to variations in product and small changes in
the test system. For this reason, set the pressure error tolerance to allow
for a range of acceptable test pressure. The pressure error tolerance is the
acceptable difference between the actual test pressure and the target test
pressure. Figure 41.
Fill Stabilize Test Dump
Zero
Peak pressure
should be near
the preset test
pressure
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