DH Instruments FPG8601, Руководство по эксплуатации и обслуживанию

Страница: 46 / 166

FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 34
After connecting the ION gauge cable, lock in the protective housing by rotating it
clockwise 1/4 turn.
Use the
[Config], [System Setup], <Options>
tab (see Section 6.6.2.2) to activate the
ion gauge and to specify the RS232 COM port.
FPG Tools will automatically use the ion gauge when zeroing the DUT manifold. Refer to
the
<DUT Manifold>
display (see Section 6.3.8) to control the ion gauge and to view the
current pressure output.
4.12 CHANGING LUBRICATION GAS
To change lubrication gas, the FPG must be shut down (see Section 5.9). All of the basic supply
connections to the FPG must then be set up with the new gas (see Section 4.4).
Press the
[Shut Down]
icon on the FPG Tools software. Wait until FPG Tools displays
<SHUTDOWN>.
Turn off the regulator that connects the FPG to the supply bottle.
Turn off the supply bottle.
Crack the fitting on the supply port of the FPG. Slowly bleed the supply pressure from the supply port
of the FPG by loosening the Swagelok fitting.
Once the supply fitting is removed, slowly turn the regulator up to release any pressure trapped
between the regulator and the bottle.
Remove line from the bottle.
Change the bottle to the new gas.
Reattach the supply fitting onto the supply port of the FPG.
Make sure that the regulator is turned down (off).
Turn on the bottle.
Adjust the supply regulator to 700 kPa (100 psi).
Press the shut down icon on the FPG Tools software to reset gauge mode operation.
Use
the
[Config], [System Setup]
menu option and locate the
<Lubrication Gas>
option found on
the
<Setup>
folder. Select the new gas then press
<Accept>
to store the change.
4.12.1 PURGING THE LUBRICATING VOLUME WITH A NEW GAS
When lubricating gas species a process of purging must take place. If the purging sequence
is not performed, there will be multiple mixing gases in the lubricating volume. This will cause
the determination of air density to be incorrect as well as affect the zero stability of the load
cell. Refer to Section 11.1 for a complete valve schematic of the FPG.
The FPG should be in gauge mode.
Change the user level mode to factory mode if FPG Tools is not already in factory mode
(see Section 6.10).
Activate valve six on the valve toolbar.
Allow valve six to be active for approximately 15 minutes.
Deactivate valve six on the valve toolbar.
Press the purge toolbar button in order to reach a stable humidity.