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PIM 417-O
PITOT-STATIC LEAK TESTER TYPE D51600
Issue 5
November 2009
Page 21
Figure 18 System Pressurisation
F. In this mode, the system will continue to control to the Set Point until the STOP key is pressed
to enter the Pressure Monitor Mode. As with the Leak Test Mode, the Pressure Control Mode
allows the Operator to restart the test and to increase or decrease the value of the Set Point
while the system is pressurised. When monitoring pressure, the SEL key can be used to
toggle between the pressure monitor display and a leak rate display (
Figure 19 ).
Figure 19 Leak Rate Display
G. As with the Leak Test Mode the STOP key is used to initiate a Vent Cycle and return the
equipment to atmospheric pressure. If the equipment remains powered, the display reverts to
the Menu 2 Pressure Control screen.
7. SETUP MODE
Main Menu 3, Setup, is used to set up timiing parameters within the system. Default values are
set for the settling period, the checking period, and the power down period. The settling period
and the checking period are part of the Leak Test Mode. The settling period is the time the system
waits from when the set pressure is achieved before continuing with the test. The checking period
is the time during which the leakage rate is measured. The power down period is universal to all
modes of operation and is the time out period for the PSLT, i.e. the time the PSLT will wait idle
before it automatically powers down.
NOTE: Automatic power down is inhibited when the PSLT is pressurised.
The default values set at the factory are suitable for most applications, and the Operator may
decide to omit any setup procedure. If the default values are to be changed to suit individual
operating requirements, then they are changed via this menu. Following power down of the
system the new settings are retained by the system EEPROM memory until further values are set.