Troubleshooting - Decagon Devices VP-4 Operator's Manual

8 TROUBLESHOOTING

8 Troubleshooting
If you encounter problems with the VP-4 sensor, they most likely
manifest themselves in the form of no reading from communication
problems, catastrophic sensor failure, or highly inaccurate measure-
ments due to sensor poisoning by volatile chemicals. Before contact-
ing Decagon about the sensor, do the following:
Data Logger
1. Check to make sure the connections to the data logger are both
correct and secure.
2. Ensure that your data logger batteries are not dead or weak-
ened.
3. Check the configuration of your data logger in ECH2O Utility
or ECH2O DataTrac to make sure you have selected VP-4.
Sensors
1. Check sensor cables for nicks or cuts that could cause a mal-
function.
2. Check your screen and filter to make sure that they are not con-
taminated or blocked. Airflow must not be restricted through
the filter.
3. In the case of inaccurate readings, consider evaluating sensor
accuracy and/or reconditioning the sensor as described in the
RH Sensor section.
20
VP-4