Chapter 4. Using Special Features
Model PM880 Portable Hygrometer User’s Manual 61
4.8.2e Entering an Equation
1. Use the arrow keys to move to the blank box at the bottom of the screen
and press
[ENTER]. A screen similar to Figure 26 appears.
2. Press [SEL] to view additional characters, symbols and functions for
creating an equation.
3. Use the arrow keys to scroll to the desired character and press [ENTER].
Press
[F1] (Delete) to delete any unwanted letters or numbers.
IMPORTANT: To enter a measurement (dewpoint, temperature, etc.) into the
equation, click on MODE in the middle of the third row. The
Select Measurement window appears. Select the desired
measurements, press
[SEL], select the desired units and press
[F3] (OK).
Figure 26: Function Creation Window
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