Michell Instruments Optidew User Manual page 32

OPERATION
The Calibration Correction window is a utility that allows an authorized user to input
calibration information in order to effect a real-time correction of the displayed, charted
and logged data within the Opti-Soft application software.
Data for dew-point temperature and ambient temperature, both in units of °C, may be
entered for correction purposes, along with the original Calibration Certifi cate reference
number and date of calibration, providing full traceability of data. Once the correction
data has been applied, by clicking on the check box, the main Virtual Hygrometer
window will indicate that corrected data is being displayed and will show the Calibration
Certifi cate number and date. This information is also saved to the
export.
Figure 11 shows the Calibration Correction window. Four sets of data may be entered:
DP Ref
DP Reading
Temp Ref
Temp Reading
Data can be entered for between 3 and 11 different dew-point and temperature
calibration points. If no data is inserted, no calibration correction is possible. Data
should be entered with the highest dew-point and temperature values at the top of
the page, in descending value order to the bottom. If out-of-sequence data or spurious
characters are entered, the software will raise a warning message and bad data must
be re-entered.
The
Calibration Certificate Number
alphanumeric. Any information entered into this field will be displayed on the main
Virtual Hygrometer window when calibration correction is enabled. In addition it will
be saved to the
and logging when correction is enabled.
24
Dew-point data for the reference hygrometer (sometimes
called the actual dew point or the standard)
Measured dew-point value of the Optidew under test
Temperature data from the reference thermometer
Measured temperature value of the Optidew under test
file. Similarly, the date of calibration may be entered for display
Log
Optidew Series User's Manual
section is an optional entry field and is
97430 Issue 2, March 2017
fi le for data
Log