Configuring output signal hold functionality - PR-21-S

PR-21 Series User Guide

Document code
IM-EN-PR21S
Revision
C
Language
English
Product
PR-21-S
Document type
User guide

The refractometer can be configured to temporarily hold its measurement result in three different cases:

  1. By using an external hold switch, see Configuring input switches.
  2. During prism wash, see Setting prism wash parameters.
  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. 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.