DH Instruments ADCS-601 - Running Validation

ADCS-601™ OPERATION AND MAINTENANCE MANUAL
© 2005 DH Instruments, Inc. Page 138
to determine the cause of the failure and correct it. Corrective actions to address an
FPG8601 validation failure include, in normal order of execution:
• Enter the correct value of local gravity at the site of use in ADCS Tools (see
Section 3.4.5).
•
Assure that the FPG8601 load cell is zeroed and spanned properly before the
test (see Section 7.2.2).
•
Assure there are no leaks in the system. Disconnect any DUT that may have
been connected to the TEST(+) port and plug the port using the plug provided.
Observe the drop rate of the PG7601 piston gauge when it is floating at a set
point and check that the fall rate is normal.
• Check stability of FPG8601 readout at zero (bypassed). The FPG8601 can be
put into the bypass position by pressing the [VENT] button on the ADCS Run
Screen Toolbar in absolute or gauge measurement mode. Check the value of
<N> on the FPG Run Screen (see Section
4.3.6.2). This value should be
stable within ± 2. If it is not, the FPG8601 piston-cylinder may need to
be
manipulated or cleaned (see Section
6.3).
•
Check the FPG8601 P, T, H indications (see Section 7.2.3.3).
•
Check the FPG8601 bubbler water supply (see Section 6.2).
•
Zero the PG7601 and FPG8601 reference vacuum CDGs (see Section 7.2.6).
•
Validate load cell linearity with the FPG8601 mass set (see Section 7.2.5)
If the FPG Validation test is not able
to result in a <PASS> condition after all
corrective actions, the FPG8601 and/or other components of the ADCS-601
system require service and DHI Authorized Service Provider should be contacted
(see Section
9.3).
7.2.3.2 RUNNING VALIDATION
To run the FPG8601 validation proceed as follows (the complete process
typcially requires 20 to 30 minutes using the default validation setup):
Prepare the ADCS-601:
Vent the ADCS-601 system by pressing the [VENT] button on the ADCS
Run Screen Toolbar. Wait for the operation to complete.
Disconnect any device that is connected to the TEST(+) port at the port and
plug the port using the plug quick connector stem provided.
Put the ADCS-601 system into the measurement mode in which the validation is
to be run (see Section
4.2.3). The absolute mode va
lidation is used to fully
verify the system and is the default mode for FPG Validation.
In ADCS Tools press [Maintenance], [Run FPG Validation]
View the [Validation Setup] form (see Figure 59). Edit if desired.
Recommended (default) values are:
<Zero FPG before each validation cycle>: Box checked to zero FPG
between each validation cycle.