DH Instruments ADCS-601, Operation And Maintenance Manual

Page: 117 / 174

6. GENERAL MAINTENANCE AND ADJUSTMENTS
© 2005 DH Instruments, Inc. Page 105
6
6
.
.
G
G
E
E
N
N
E
E
R
R
A
A
L
L
M
M
A
A
I
I
N
N
T
T
E
E
N
N
A
A
N
N
C
C
E
E
A
A
N
N
D
D
A
A
D
D
J
J
U
U
S
S
T
T
M
M
E
E
N
N
T
T
S
S
6.1 SUMMARY
PG7000 was designed for very low maintenance operation. However, certain regular maintenance
functions are required to assure reliability and the best performance over time. These are summarized in
Table 18, including cross-references to sections of this manual detailing each procedure.
Table 18 . Mechanical maintenance procedures
SYSTEM PROCEDURE DESCRIPTION FREQUENCY SEE
SECTION
FPG8601 Add water to
the bubbling
system and
purge the trap Access filter trap and bubbler on rear of
FPG8601 Platform to empty trap and add
water to bubbler. Every 3 months or when humidity
indicated on
FPG8601 Run Screen is
out of range low.
6.2
FPG8601 Clean piston-
cylinder
Remove piston-cylinder from FPG
mounting post, clean and reinstall. When FPG read out is unstable; when
the FPG lubrication gas is known to
have been contaminated 6.3
PG7601 Clean piston-
cylinder
Remove piston-cylinder module from the
PG7601 Platform. Disassemble the
module and clean the piston-cylinder.
Reassemble and lubricate the module.
Install in the PG7601 Platform. When pressure set by PG7601 is
noisy; pressure controller is unable to
float piston consistently; rotation time
is lower than usual and/or deceleration
is faster than usual 6.6
PG7601 Adjust piston
position
indication
system
Run a routine from the PG7000 Terminal
with piston in fully down and up positions. 6 months; if pressure control to float
PG7601 piston does not operate
correctly; if pressure is not stable
when piston is floating 6.7
PG7601 Replace piston
rotation drive
belts
Disassemble PG7601 rotation plate,
replace belts and reassemble. If piston rotation system no longer
operates reliably 6.8
PG7601 Adjust on-board
vacuum gauge
Run an automated function from ADCS
Tools that automatically adjusts the
PG7601 internal vacuum gauge to make
it agree with the reference vacuum CDG.
6 months 6.9
ADCS
Control
Cabinet Change or
interrupt
TEST
GAS SUPPLY ,
If it is necessary to interrupt the pressure
supply to the
TEST GAS SUPPLY port
on the Control Cabinet, a special
procedure must be used to be sure
supply pressure does not become lower
than the pressure in the FPG lubrication
circuit.
When it is necessary to interrupt
pressure supply to the Control Cabinet
TEST GAS SUPPLY port.
6.11
ADCS
Control
Cabinet Empty drive air
traps Access drive air traps from front of the
control cabinet and drain traps. 3 months, or more frequently if water
is observed in traps 6.12
ADCS
Control
Cabinet Check/adjust
Gas Supply
Panel settings Access Gas Supply Panel from front of
the control cabinet and make
adjustments to regulators as needed. 3 months or more frequently if gas
supplies are unstable 6.13
FPG8601
and
PG7601 Adjust PPC3
pressure
controllers Run an automated routine from ADCS
Tools that automatically adjusts the PPC3
pressure controllers to agree with their
pressure reference (PG7601 or PFG8601).
1 year or if pressure control becomes
too slow or unreliable. Use to reduce
difference between requested pressure
and final pressure when using FPG8601
pressure reference. 6.10