NTI ENVIROMUX Series Instruction Manual page 18

NTI ENVIROMUX TEMPERATURE/HUMIDITY SENSOR ATTACHMENT
Accuracy
The reported accuracy of these sensors is based on an environment of moving air. In a stagnant air environment, the sensor
may read higher than actual temperature.
Coverage
The coverage area for temperature/humidity sensors cannot be specified as there are too many variables that can affect the range
in a sensor's environment.
Behavior
When an E-STHS-xx, E-STHSB or E-STHSM-E7 is connected to an ENVIROMUX system, three sensors values will be reported
for the connected port;
First will be displayed the observed temperature value of the sensor.
Second will be displayed the observed humidity value of the sensor.
Third, is a calculated value using the observed Temp and Humidity values called Dew Point. Dew point temperature is
the value where 100% humidity would be achieved. If air and/or surface temperatures are below this value,
condensation will occur.
Dew Point Measurement as it relates to Electronic Equipment
The dew point is the temperature at which air becomes saturated with water vapor.
When further cooled, the airborne water vapor will condense to form liquid water (Dew is an example).
The two primary factors influencing the Dew Point is Temperature and Relative Humidity. As the humidity rises the closer the Dew
Point will be to the current temperature.
In a controlled environment it is important to keep condensation away from electronic equipment. Most electronic equipment will
be susceptible to failure in a condensing environment.
Also in very low Dew Point environments static discharge events are more likely to occur, again putting electronic equipment at
risk.
Note: For people, Dew Points higher then 21°C (70°F) and below -22°C (-8°F) are uncomfortable environments.
Warnings and Alerts from the ENVIROMUX
Setting the Dew Point alerts will depend upon the environment that is being monitored.
An example would be an equipment room that normally operates at 21°C (70°F).
It may be desirable to be warned when the Dew Point reaches 19°C (66°F) and alerted when the Dew Point reaches 21°C (70°F)
as condensation would become a high probability.
For low Dew Points, it may be desirable to be warned when the Dew Point reaches -1°C (30°F) and alerted when the Dew Point
reaches -4°C (25°F) as these conditions would be perfect for static discharge events.
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