Figure 33 Slew rate damping
Avoid overdamping, the signal should not be made insensitive.
7.2 Configuring output signal hold
functionality
The refractometer can be configured to temporarily hold its measurement result in three
dierent cases:
1. By using an external hold switch, see Configuring input switches (page 68).
2. During prism wash, see Setting prism wash parameters (page 82).
3. For a preprogrammed time when there is an intermittent loss of sample on the prism
(due to voids in the process).
When the measurement result is in hold, the displayed concentration value and mA output
do not change. The diagnostic values (for example,
nD) shown on-screen always reflect the
actual state of the measurement.
The measurement hold takes place after the CALC value and field corrections have been
calculated but before the signal
filtering (damping) takes place, see Calibrating
concentration measurement (page 72). If the hold is on, the output filter remains in its
earlier state, and the output signal is stationary. If the hold is started when there is no output
signal (for example, no sample on the prism), there will be no measurement signal during
the hold.
PR-23 Series User Guide
IM-EN-PR23-E
62
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