Hold And Signal Damping; Hold Functions With Dd-23; Figure 35 Damping Stops During Hold - Vaisala PR-23 Series User Manual

7.2.6 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). The following
figure shows this behavior (gray areas represent the periods when the hold is active).
Figure 35 Damping stops during hold
7.2.7 Hold functions with DD‑23
The Digital Divert Control System DD‑23 uses the displayed concentration value in its
decision logic.
CAUTION!
system unsafe by freezing the measurement result.
Hold during wash must be used with DD‑23. Otherwise the signal damping combined with
low n values caused by the wash process may give erroneous information to the DD‑23
D
after the wash is over.
Do not use the external hold functionality with a DD‑23. It could render the
Chapter 7 – Configuration and calibration
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