Entering Constants And User Functions - GE PM880 User Manual

Chapter 4. Using Special Features

4.7 Entering Constants and User Functions

The PM880 enables you to enter two types of constants, a user constant and
a saturation constant, as well as user-defined functions and tables to
manipulate data.
A user constant is a fixed value that is used to multiply the moisture ppm

value (K PPMv). A saturation constant is used to calculate PPMw in
non-aqueous liquids. If you do not know the saturation constant of the
liquid, contact the factory.
To extend programming capability, user functions enable you to program up
to 8 mathematical equations. The PM880 also enables you to enter up to
6 tables of non-linear or empirical data to support user function equations.
This section consists of the following information:
•
Entering a User Constant - page 55
•
Entering a Saturation Constant - page 56
•
Entering User Functions - page 58
•
Setting Up User Tables - page 62
54 Model PM880 Portable Hygrometer User's Manual