Uson SPRINT LC, Owner'S Manual

Page: 95 / 208

Page 95
Fill
Zero
Pressure Error
Pressure error is important because—
¾ P ERR tells Sprint to stop the test if the pressure goes too far above
the preset test pressure. Figure 42.
¾ If the pressure doesn’t get close enough to the preset test pressure,
P ERR tells Sprint LC to stop the test. Figure 43.
In a pressure decay test, the
Press. Error is set as an equal plus and minus
tolerance around a nominal test pressure value. Figure 41. Enter one
number in pressure units and Sprint LC sets both the high and low
pressure error values. Sprint LC monitors pressure error during the fill and
stabilization phases of a pressure decay leak test.
In a flow test, pressure error is checked at the end of test time to allow for
the necessary pressure drop caused by the flow. More later about how
pressure error functions in a flow test.
Negative Pressure Error
FIGURE 43
TIME
Test Pressure
(- P ERR)
(+ P ERR)
PE