DH Instruments FPG8601, Руководство по эксплуатации и обслуживанию

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FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 138
Table 50. Internal Valve Descriptions
VALVE DESCRIPTION
1 This valve is activated to use the absolute mode regulator to supply pressure to the FPG lubricating volume.
In gauge mode the valve is closed.
2 This normally open valve is opened to use the gauge mode regulator to supply pressure to the FPG
lubricating volume.
3 A three way valve used to allow the internal transducer to read the lubrication pressure in the lubricating
volume. The normal state of the valve is to read the lubrication pressure. When the valve is activated, the
internal transducer will either measure atmosphere, or the pressure in the lower mounting post, depending on
the state of valve 4.
4 A three way valve used to allow the internal transducer to read atmosphere or the pressure in the lower
mounting post. The normal state of the valve is to read atmosphere. Valve 3 must first be engaged before
this valve can be used to change the pressure supplied to the internal transducer.
5 Valve 5 evacuates the lubrication volume when actuated. This valve is used during the transition to absolute
mode and during absolute mode purging.
6 A normally open valve used to vent all pressure in the lubricating volume to atmosphere. This valve is opened
when the
[Shut Down]
icon is used and during purging in gauge mode.
7 Connects the LNI Regulator to vacuum for absolute mode operation. This regulator is adjusted to maintain a
40 kPa pressure relative to the pressure on it's reference port. Therefore in absolute mode, the lubrication
pressure is approximately 40 kPa. When a vacuum pump is on, this valve should never be opened at the
same time as valve 8.
8 Connects the LNI Regulator to atmosphere for gauge mode operation. This regulator is adjusted to maintain
a 40 kPa pressure relative to the pressure on it's reference port. Therefore in gauge mode, the lubrication
pressure is approximately 140 kPa. When a vacuum pump is on, this valve should never be opened at the
same time as valve 7.
9 Controls the vacuum reference isolation valve on the bottom of the FPG mounting post. The pneumatic driver
for this valve is on the FPG base.
10 Controls the normally open pneumatic bypass valve on the FPG manifold. The valve is activated to read a
pressure and deactivated to return to a zero pressure condition. The pneumatic driver for this valve is on the
FPG base.
11 Controls the pneumatic vacuum reference control valve on the FPG manifold. VLPC absolute pressure range
1 requires this valve to be actuated. FPG Tools automatically toggles the state of this valve based on the
current operation. The pneumatic driver for this valve is on the FPG base.
12 Controls the vacuum reference sensor isolation valve on the front of the lower mounting post. FPG Tools
actuates this valve to allow the vacuum reference sensor to measure the pressure in the lower mounting post.
The pneumatic driver for this valve is on the FPG base.