monitor 211

Error 6 is indicating that the input is over the maximum value allowed for the sensor type you have select. If you are using a silicon diode sensor, the maximum input value is 2.5V and if you are using a resistive sensor like a Platinum or Cernox, the maximum resistance is 7500 ohms. If you are using silicon diodes, the Error 6 normally indicates that the sensor is reading open. If you have a Cernox sensor, it may be that the resistance is greater than 7500 ohms or an issue with the connections.

Let me know what sensor you are using and I can offer more troubleshooting advice.

On the 25-pin connector that plugs into the Model 211, use a high impedance digital multimeter to measure the resistance of the sensor leads between pins 3 & 4 and also between pin 15 & 16. This should be a low resistance that is less than 50 ohms. If you have continuity for both readings, place the Common probe on pin 16 and the Ohms probe on pin 4 and you should read a very high resistance from 3 to 6 Meg Ohms. Reverse the probes and you should read an open circuit.

If you do not have continuity with either of the first measurements, you have an open lead going to the sensor. If you read a resistance in both directions of the 2nd reading, the sensor is defective and would need to be replaced.