Chapter 4. Using Special Features
70
Model PM880 Portable Hygrometer User’s Manual
4.10Entering Reference Data
WARNING! DO NOT CHANGE THESE VALUES UNLESS INSTRUCTED BY GE TO
DO SO.
The PM880 requires reference values for its measurement circuitry for
moisture and pressure inputs. The references are factory calibration values.
These values can be found on the label located inside the battery
compartment.
If instructed by GE to change these values, use the following steps.
1.
If the menu is not active, press
[MENU]
.
2.
Use the arrow keys to scroll to
Service
and press
[ENTER]
.
3.
Use the arrow keys to scroll to
References
and press
[ENTER]
. The
screen appears similar to Figure 30.
Figure 30: References Window
