BEAMEX PGL, Instruction Manual, Page: 13 / 16

7
Leak Tests
If you want to test the pump and the connected measurement system, do as follows:
If you do not already have a calibration measurement system connected to the pump,
connect an accurate enough pressure measurement instrument, e.g. a Beamex
400mC pressure module to the pump.
You'll also need a clock to measure time.
Leak Test for Positive Pressure
Increase pressure using constant change rate up to pump's full scale positive pres-
sure (400 mbar / 6 psi). Start your clock.
After five minutes, record the pressure indication, p
5
.
After ten minutes, record the pressure indication, p
10
.
Calculate the leak, L
p
, using this equation:
5
10 5
p
p
p p
L


If L
p
is less than 0.01 (1 %), the system is leak free.
Leak Test for Negative Pressure (Vacuum)
Decrease pressure using constant change rate down to pump's full scale negative
pressure (-400 mbar / 40 kPa / -6.0 psi). Start your clock.
After five minutes, record the pressure indication, p
v5
.
After ten minutes, record the pressure indication, p
v10
.
Calculate the leak, L
v
, using this equation: L
v
= p
v5
- p
v10
[kPa].
If L
v
is less than 1 kPa (approx. 0.14 psi), the system is leak free.