Chapter 4. Using Special Features
Model PM880 Portable Hygrometer User’s Manual 71
4.10 Entering Reference Data (cont.)
4. Use the arrow keys to move to the desired tab and press [ENTER].
5. Use the arrow keys to move to High Ref and press [ENTER] to open the
text box.
6. Use the numeric keys to enter the value recorded on the back of the
PM880 and press
[ENTER].
7. Repeat steps 5 and 6 for the low reference value.
Next, do one of the following:
• To exit and return to taking measurements, press [F3] and then
[MENU].
• If you need to change values, use the arrow keys to move to the other
tab and return to step 5 above.
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