5. 8BTROUBLESHOOTING
Page 21
© 2007 DH Instruments, a Fluke Company
5.5
BOOSTER RUNS (CYCLES) CONTINUOUSLY
The booster is a pneumatically operated pump. The reciprocating action is caused by an imbalance of
forces within the pump due to the opposing drive air pressure and the high pressure instrument gas
supply that is being boosted. If the booster runs continuously, and there is no problem with the check
valves (see Section 5.4), it means that the forces do not equalize.
•
Check that the high pressure supply to the booster
IN
port is at least 300 psi (2 MPa). If not, ensure
that supply meets required specifications (see Section 2.3.2.2).
•
Check that the high pressure circuit connected to the booster
OUT
port is not open to atmosphere or
doesn’t have a severe leak.
•
If the shop drive air supply pressure is above 40 psig (250 kPa), adjust to below this limit. If the
booster stops running, increase high pressure supply to
IN
port instrument gas supply and try again.
5.6
CANNOT ACHIEVE DESIRED PRESSURE
•
Check that the high pressure gas supply to the booster
IN
port is set above 300 psi (2 MPa)
(the minimum value). In some cases, the minimum pressure supply is 600 psi (40 MPa). If in doubt,
increase instrument gas supply to 600 psi (40 MPa).
•
Check that the drive air is set at the correct value and that it is supplied to the booster. See Section
2.3.2.1.
•
Check that no leaks exist in any of the pressure circuits. Repair any existing leaks.