YSI WaterLog Series, Owner'S Manual

Page: 40 / 174

tp20m( AnalogX ): Convert the voltage on analog channel X (specified in Task
AnalogX) to a temperature based on the built in voltage to temperature equation
TP20M. This is a temperature probe used by the Maine district of the United
States Geological Survey. The actual equation is:
Created Tasks:
The Created Tasks button allows measurement values from other Tasks as well as the current
Task to be used. The current Task value will appear as RawValue in the list. Note that some
values may not appear in the list and can thus cause an ERR or erroneous value to appear when
pressing the Evaluate button. To avoid this, verify that each Task being used in the equation has
a Value, and if not, select the Task and press the Measure button.
System Constants:
There are a few constants the system recognizes. They are implemented to the highest precision
possible.
pi The value for pi is 3.14159265359.
e
The value for
e
is 2.71828182846.
4-14 Managing Tasks
System 5000
TM