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6 Configuration and calibration
45
defined tolerance time (see Section 6.2.3 for tolerance time). By default the QF thres-
hold value is -500.
6.2.5 Hold source interactions
There are three different reasons why the measurement signal may be in hold. All
three result in the same behaviour, but they also interact with each other.
Wash-related hold (Section 6.2.2) and external hold (Section 6.2.1) are connected in
parallel. If at least one of them is active, the measurement result will be in hold. Tol-
erance time (Section 6.2.3) is independent of these two, but the tolerance time will be
reset whenever there is another reason for the measurement hold.
For example, if the tolerance time is set to 10 seconds, and wash hold becomes active
after 7 seconds, the remaining tolerance time will be reset to 10 seconds After the
wash is over, there is still 10 seconds of tolerace time remaining.
6.2.6 Hold and signal damping
The signal filtering (damping) is stopped during hold. The last filtered value is shown
on the screen and set to the mA output (if the concentration output is configured).
Figure 6.5 illustrates this behaviour (gray areas represent the periods when the hold
is active).
0
50
100
150
200
Time [s]
40
42
44
46
48
50
52
54
56
58
60
CONC [%]
Original signal
Filtered (damped) output
Figure 6.5
Damping stops during hold
Содержание K-PATENTS PR-23 Series
Страница 1: ...IM EN PR23 v 2 00 Instruction Manual Vaisala K PATENTS Process Refractometer PR 23...
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Страница 17: ...2 Inline refractometer sensor 7 2 2 2 PR 23 mounting guide...
Страница 26: ...16 PR 23 instruction manual...
Страница 29: ...4 Prism wash systems 19 Figure 4 1 A prism wash system for steam non sanitary...
Страница 30: ...20 PR 23 instruction manual Figure 4 2 A sanitary prism wash system for steam...
Страница 32: ...22 PR 23 instruction manual Figure 4 5 Wiring for a prism wash system for steam...
Страница 33: ...4 Prism wash systems 23 Figure 4 6 A prism wash system for high pressure water non sanitary...
Страница 34: ...24 PR 23 instruction manual Figure 4 7 A sanitary prism wash system for high pressure water...
Страница 35: ...4 Prism wash systems 25 Figure 4 8 Wiring for a prism wash system for high pressure water...
Страница 39: ...4 Prism wash systems 29 Figure 4 12 Mounting of the wash nozzle for Process refractometer PR 23 GP...
Страница 40: ...30 PR 23 instruction manual...
Страница 50: ...40 PR 23 instruction manual...
Страница 72: ...62 PR 23 instruction manual...
Страница 74: ...64 PR 23 instruction manual Figure 8 2 Motherboard PR 10600 and H1 interface card PR 10701 in detail...
Страница 113: ...9 Sensor specifications 103 WZ WZ WZ WZ WZ Figure 9 15 Mounting the sensor with a wfc flow cell...
Страница 151: ...9 Sensor specifications 141 Figure 9 38 Intrinsically safe wiring PR 23 IA according to WRG 362...
Страница 152: ...142 PR 23 instruction manual Figure 9 39 Intrinsically safe wiring PR 23 IF with STR according to WRG 478...
Страница 174: ...164 PR 23 instruction manual...
Страница 179: ...11 Safe Drive 169 11 3 3 Safe Drive steam wash system parts...
Страница 186: ...176 PR 23 instruction manual 11 4 2 Wiring Figure 11 9 PR 23 SD system wiring...
Страница 204: ...194 PR 23 instruction manual Figure 11 19 Markings on the retractor handle...
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