VP-3
User’s Manual
7. Troubleshooting
24
7. Troubleshooting
If you encounter problems with the VP-3 sensor, they most likely
will manifest themselves in the form of no reading from
communication problems or catastrophic sensor failure, or highly
inaccurate measurements due to sensor poisoning by volatile
chemicals. Before contacting 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's batteries are not dead or
weakened.
3. Check the configuration of your data logger in ECH
2
O Utility
or ECH
2
O DataTrac to make sure you have selected VP-3.
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
contaminated 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.
