Additel 226, User Manual

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c. Start counting down the waiting time, and record the real-time pressure at the end of the waiting time as the initial
pressure;
d. Start the test, count down the test time, and start to calculate the real-time leakage, real-time leakage = initial
pressure-real-time pressure;
e. Record the pressure at the end of the test time as the end pressure;
f. The entire leak detection process ends, and the final leakage = initial pressure - end pressure;
2. The whole process will be displayed in stages in the leak curve at the bottom of the screen.
7.3 PSV test
The PSV test is used for testing the opening pressure of the safety valve. In order to ensure the accuracy of the test,
after starting the test, the pressure gauge/calibrator will automatically read the data with a high-speed of 10 times per
second and continuously record the real-time pressure data. It will calculate the maximum pressure, and draw the
real-time pressure curve to visually show the trend of the pressure. Click on the start button in bottom area of the PSV test
page to enter the setup, as shown in Table 39.
Table 38 PSV test setting
Subject Valid value Description
Pressure type Gauge/ absolute Pressure type of DUT, see the calibrator model
Unit Different modules support different pressure units Select corresponding pressure unit
7.3.1 PSV test performing
1. Connect air circuit
a. Connect the device to the air circuit;
b. Press the Start icon on the right of the screen to start performing, apply the pressure gradually to the safety valve;