When using the above sensors in conjunction with a BAS or Sigma building management system, out of range values can occur.
If is possible for the sensor to provide greater than the specified 10 Volts DC output, and this causes the Outstation / Controller to display a default value.
To resolve this issue carry out the following;
1 - Connect a 10K ohm 0.1% resistor in series with the 0 – 10 volt signal as shown in the drawing below.
2 - Create a lookup table in Sigma or BAS 2800+ with the following values.
0 – 0
83.335 – 100.000
100.000 – 100.000
3 - Allocate this table to the analogue input object, and download the (Point / Object) and table, to the (Outstation / Controller).
The above configuration will allow the DC voltage to rise to 11.335 Volts before an out of range alarm would be generated.