Analog Output Overrange Example - INDIGO200SERIES - INDIGO201

Indigo 201 User Guide

Document code
M211877EN
Revision
F
Language
English (United States)
Product
INDIGO200SERIES
INDIGO201
Document type
User guide
Consider a probe with 0 ... 5 V output, scaled to 0 ... 200 000 ppm (= 0 ... 20 %) CO2.
  • When the measured CO2 rises above 20 %, the output rises above 5 V.
  • The output keeps rising until the measurement is 21 %CO2, at which point the probe outputs 5.25 V.
  • If the CO2 level rises above 21 %CO2, the output still remains at 5.25 V.
  • If the CO2 level rises above 22 %CO2, the output enters the error state, which is 0 V for the 0 ... 5 V output.
Figure 1. Example of Analog Output Overrange Behavior

This example uses output scaled to 0 ... 5 V and 0 ... 200000 ppm, error level set to 0 V, clipping set to 5 % overrange, and error limit set to 10 % overrange. CO2 concentrations (ppm) are indicated for the clipping point and error limit point.