Analog output overrange behavior - GMP231

Analog output of the GMP231 has a defined behavior when the values measured by the probe are outside the scaled analog output range:

• Output is allowed to go 10% over the scaled range.
• Output is set to error state when measured value is more than 10% outside the scaled range.
• Output resumes normal function when measured value returns to within 10% of the selected range.

For example, consider a GMP231 with 0 ... 20 mA analog output, scaled to 0 ... 10 %CO₂.

• When measured CO₂ rises above 10 %CO₂, the output rises above 20 mA.
• The output keeps rising until the measurement is 11 %CO₂, at which point the probe outputs 22 mA.
• If the CO₂ level rises above 11 %CO2, the output enters the error state, which is 23 mA for the 0 ... 20 mA output.

You can change the analog output overrange behavior using the AOVER command.