FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Page 44
5.9
SHUTTING DOWN THE FPG
Always shutdown the FPG when it will not be used for an extended amount of time or prior to performing
maintenance operations. This reduces the risk of back pressurizing the system and contaminating
internal pneumatic plumbing or the piston-cylinder.
If at any time the supply pressure to the FPG is reduced to ATM and the FPG is in gauge mode, water
can be forced from the bubbling system into the main supply regulators and valves. This standing
water will rapidly deteriorate these parts and prevent the FPG from functioning properly.
If at any time the pressure in the reference or test ports of the FPG exceeds the lubrication pressure,
the lubricating flow will move in reverse from the mounting post to the lubricating volume. This
typically results in a dirty piston-cylinder indicated by poor stability at zero.
Press the function toolbar
[Shut Down]
button (see Section 6.4.2) to shut down the FPG. FPG Tools
sets the FPG to a zero condition (see Section 5.2.1) then vents all lubrication pressure. Only after the
lubrication pressure is near ATM is the shutdown process complete. At this point it is safe to perform
maintenance operations on the FPG. To resume normal operation, press the
[Shut Down]
button again
or re-select the current pressure measurement mode in the
[Units]
menu.
Содержание FPG8601
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