Easidew Plus Portable Hygrometer User’s Manual
Kahn Instruments
5
OPERATION
7. Switch the instrument on. The display will begin to change as the sensor
responds to the applied dew point.
8. Allow the gas to flow until the display shows a stable reading. Typically
this would be around 15 to 30 minutes for spot checks at dew points of
-40°F (-40°C ) and above.
9. Switch the unit off and disconnect the sample lines.
!
Before disconnecting the Easidew Plus Portable Hygrometer
from the gas line it is essential to vent the system to
atmospheric pressure, otherwise severe injury could result.
NOTE: Filters are essential for potentially dirty/contaminated gases – the
installed filter should be checked before and after use and replaced regularly
- as required.
3.3
Measuring Dew Points Below -40°F (-40°C )
Due to the significantly lower levels of moisture present at dew points of this level, and
the increased amount of time to dry the system out, the response times of the sensor
will be significantly increased. The table below offers an approximate guide to the
times taken for the instrument to stabilize at a given dew point (from a starting point
of 10°Cdp (50°Fdp) ambient):
Target Dew Point
T100 Response Time
(mins)
°F
°C
-22
-30
5
-40
-40
15
-58
-50
30
