CDP301 Dew-Point Tester User’s Manual
22 97585 Issue 1, June 2020
OPERATION
Max Depress
10 to 150°C (50 to 302°F) in 1°C (1.8°F) increments – the maximum temperature
depression below Tb which can be set.
Dew-Point Type (DEWP Type)
HCdp, Wdp – Hydrocarbon dew point or Water dew point. The selection determines the type
of illumination applied to the mirror surface. White light in HCdp mode enables observation
of thin lms of hydrocarbon condensates on the mirror surface. Red light in Wdp mode
provides greatest sensitivity to observe water dew droplets and ice crystal formations.
Tip:
By changing between the two Dew Point Type modes when observing precipitation on
this mirror surface the user can determine if the dew point observed is that of pure
hydrocarbon, pure water/ice or a combination of both occurring simultaneously at the
same analysis pressure and mirror temperature.
Cal Oset (Calibration Oset)
-10.0 to +10.0°C (+14 to +50°F)/min in 0.1°C (0.18°F) increments – an oset value
to correct total measurement error. If the user wishes, a known dew-point gas may
be used as a reference and a measurement taken. Any oset in the measurement can
be noted and entered here as a xed oset correction to subsequent measurements.
CDP301 is factory calibrated and certied. The fundamental cooled-mirror measurement
principle applied is inherently stable and accurate. Calibration adjustments should not
be necessary. Normally Cal Oset will remain at the default value, 0.0˚C.
3.2.4.2 Logging Configuration Page
Allows the user to set parameters for log data, still image and video captures.
• Enter key press – access options table
• Arrow keys press – scroll through options table
• ESC key press – exit options table
Figure 14
Configuration Menu – Logging Page
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