O & M Manual
Revision C (7/09)
3 -
5.25
Control Menu [CONTROL] ................................................................................................................. 38
Figure 5-3 Control Relay Example, Hysteresis and Two Opposite Phase Options ........................................ 41
Figure 5-4 Alarm Relay Example ............................................................................................................... 42
5.26 Diagnostics Menu [DIAG] ...................................................................................................................... 43
PART 6 – CALIBRATION ................................................................................................................................ 47
6.1 General ...................................................................................................................................................... 47
6.11
D.O. Span Cal (1-spl) ............................................................................................................................ 47
6.12
Dissolved Oxygen Air Span Cal (% sat) ................................................................................................ 49
6.13
Dissolved Oxygen Zero Cal................................................................................................................... 50
6.2
Temperature Calibration........................................................................................................................ 52
PART 7 – PID CONTROLLER DETAILS ....................................................................................................... 53
7.1
PID Description .................................................................................................................................... 53
7.2
PID Algorithm ...................................................................................................................................... 53
Figure 7-1 Q45 ISA (Ideal) PID Equation ................................................................................................... 54
7.3
Classical PID Tuning ............................................................................................................................ 55
7.4
Manual PID Override Control ............................................................................................................... 56
7.5
Common PID Pitfalls ............................................................................................................................ 56
PART 8 – SYSTEM MAINTENANCE .............................................................................................................. 58
8.1
General ................................................................................................................................................. 58
8.2
Analyzer Maintenance........................................................................................................................... 58
8.3
Sensor Maintenance .............................................................................................................................. 58
PART 9 – TROUBLESHOOTING .................................................................................................................... 59
9.1
General ................................................................................................................................................. 59
9.2
External Sources of Problems ................................................................................................................ 59
9.3
Analyzer Tests ...................................................................................................................................... 60
9.31
Display Messages ................................................................................................................................. 61
Figure 9-1 Q45D Display Messages ............................................................................................................ 62
Figure 9-1 Q45D Display Messages (continued) .......................................................................................... 63
9.4
Sensor Tests .......................................................................................................................................... 63
Figure 9-2 Pt1000 RTD Table .................................................................................................................... 64
Figure 9-3 Reference – Barometric Pressure Conversion ............................................................................. 65
Figure 9-4 Reference – Oxygen Solubility Table ......................................................................................... 66
SPARE PARTS .................................................................................................................................................. 67
