Quality Assurance Of The Instrument - Swann AMI Hydrogen QED Operator's Manual

AMI Hydrogen QED
Maintenance
6.5.
Quality
assurance
level
40

Quality Assurance of the Instrument

Every SWAN on-line instrument is equipped with integrated, auton-
omous quality assurance functions to survey the plausibility of each
measurement.
For the AMI Hydrogen QED these are:
 continuous monitoring of sample flow
 continuous monitoring of the temperature inside the transmit-
ter case
 periodic accuracy test with ultra high precision resistors
Further a manual, menu driven inspection procedure can be carried
out using a certified reference instrument. The AMI Inspector is
connected to the same sample point and provides the reference
value. After enabling the quality assurance procedure by defining
the quality assurance level, the instrument reminds the user period-
ically to run the procedure and results are stored in a history for re-
view.
Central feature of the quality assurance function is the assignment
of the monitored process to a Quality assurance level.
There are three predefined levels plus a user level. Hereby the in-
spection interval, the deviation limits of temperature and measuring
result between the inspection equipment and the monitoring instru-
ment are defined.
 Level 1: Trend; Measurement used as an additional informa-
tion to follow the process indicating trends.
 Level 2: Standard; Monitoring of several parameters of a pro-
cess (e.g. hydrogen, saturation). In case of instrument failure,
other parameters can be used for process monitoring.
 Level 3: Crucial; Monitoring of critical processes, value is
used for control of another part or subsystem (valve, dosing
unit, etc.).
Additional level:
 Quality level 4: User; User defined inspection interval, maxi-
mal deviation of temperature and measuring result.
A-96.250.791 / 040219