With wireless technology it is possible to achieve telemetry of distant sensors
using the popular GSM network and DPS-Promatic Telecom Control Systems (TCS) boards.
Sensors can be 4-20 ma type, 1-5 V type or others on request.
TCS 3.0 Industrial board can come with a built-in signal conditioner for a 4-20 ma
or for a 1-5V sensor.
A menu in the TCS OS lets you set the 2 low and the 2 high thresholds, as follows:
Analog In 4-20mA = 50%
1) Lower Threshold 10%
2) Low Threshold 25%
3) High Threshold 60%
4) Higher Threshold 80%
5) Alarms = Disabled
The value in the first line is what the TCS reads at the moment from the sensor.
The value is expressed in percentage. 0%=4 ma, 100% equals 20 ma.
If no sensor is connected you will get a SENSOR ERROR (if alarms are enabled).
Example: if thresholds are set as above, and value is 50%, no alarm will be sent.
If the signal goes to 18% (below 25), an alarm will be sent, if it goes to 7% (below 10)
another alarm will be sent. Same will happen if it will goes above 60% or above 80%.