|
Fan-Aspirated
MET4A
Humidity Sensor Response Time |
|
by Tim Potter |
|
|
Summary |
| A Fan-Aspirated MET4A Meteorological Measurement
System was tested to determine the
recovery time of the relative humidity sensor from 100% RH.
The measured relative humidity recovery time constant was
less than 11 seconds. |
|
Test
Method |
|
The MET4A was placed into a humidity chamber.
Time-stamped relative humidity measurements were
periodically taken until 100% RH was measured.
The MET4A was immediately removed from the chamber and
relative humidity measurements continued until the measured RH
values stabilized at room ambient humidity.
The test data was analyzed to determine the relative
humidity recovery time constant, defined as the time required
for a 63.2% change in measured RH. |
|
Results |
|
Refer to Figure 1.
The graph demonstrates a measured relative humidity
recovery time constant of less than 11 seconds.
Figure 1. Met4A Humidity Recovery Time
|
|
|
©2007
Paroscientific, Inc.
|
