Figure 20 Room Measurement Example - Kahn Optisure Remote User Manual

OPERATION
The basic considerations for each measurement type are as follows:
In-Situ
1. Dew Point Sensor position – will the sensor see an area of the environment
that is representative of what you want to measure? For example; you are
looking to measure the Relative Humidity of a room which is controlled by
an HVAC vent at either end (see figure – Room Measurement Example)
you will get very different readings depending on whether the sensor
is positioned at point A, point B or point C. Point C provides the most
representative sampling point given that it won't be disturbed by the vent
or the door.
2. Gas speed – if you are planning on installing the sensor in a duct, consider
how fast the sample gas is moving through it. Excessive flow speed will
cause displacement of the condensate layer on the mirror, leading to
unstable measurement.
3. If this is the case, then a guard fitted over the sensor can mitigate the effects
of excessive gas speed by dissipating the sample throughout its' surface
area. An appropriate guard can be purchased from Kahn Instruments.
24
1
A
C
1. Door
2. HVAC Duct, air into room
3, 4. Ceiling Vents
Room Measurement Example
Figure 20
Optisure Remote User's Manual
2
3
B
4
March 2018