YSI WaterLog Series, Owner'S Manual

Page: 37 / 174

Operators: Built-in operators provide the base for arithmetic and logical equations. They are of
lower precedence than built-in functions and can be accessed by pressing the Operators button.
Powers:
x^y: x raised to the power of y, 3^5 = 243
Multiplication / Division:
x * y: x multiplied by y, 20 * 30 = 600
x / y: x divided by y, 20 / 30 = 0.666667
Addition / Subtraction:
x + y: x added to y, 20 + 30 = 50
x - y: x subtract y, 20 - 30 = -10
Low Level Logic:
x == y: Is x equal to y (Notice double equal signs) 1 if true 0 if false
x!=y: Is x not equal y 1 if true 0 if false
x > y: Is x greater than y 1 if true 0 if false
x >= y: Is x greater than or equal to y 1 if true 0 if false
x < y: Is x less than y 1 if true 0 if false
x <= y: Is x less than or equal to y 1 if true 0 if false
x & y: Logical AND operation. If x does not equal 0.0 AND y does not
equal 0.0 then return 1.0, else return 0.0. For example,
(A1
>
2.5)&(A2
>
3.5) returns 1.0 if Task A1 is greater than 2.5
AND Task A2 is greater than 3.5, else it returns 0.0
x | y: Logical OR operation. If x does not equal 0.0 OR if y does not
equal 0.0 then return 1.0, else return 0.0. For example,
(A1
>
2.5)|(A2
>
3.5) returns 1.0 if Task A1 is greater than 2.5 OR if
Task A2 is greater than 3.5, else it returns 0.0
System 5000
Managing Tasks 4-11
TM