YSI WaterLog Series, Owner'S Manual

Page: 39 / 174

Logical functions:
if(x,y,z) If condition x is true then return y else return z
IF (Batt
>
12.5,10,-10) = 10.0 if Batt is greater than 12.5
= -10.0 if Batt is less than 12.5
Built In Specific Sensor Functions:
When a sensor is used in several applications it may be easier to build an equation
into the operating system for that sensor rather than have customers enter the
equation every time the sensor is used. The following temperature equations are
for thermistor based temperature probes. When using one of these temperature
probes see the app note for its full details.
h377c( AnalogX ): Convert the voltage on analog channel X (specified in Task
AnalogX) from the H-377 thermistor probe to temperature in degrees Celsius. The
following is the actual equation used:
h377f( AnalogX ): Convert the voltage on analog channel X (specified in Task
AnalogX) from the H-377 thermistor probe to temperature in degrees Celsius.
This function uses the same equation as the function above, but uses the following
conversion from degrees C to degrees F:
tp20b( AnalogX ): Convert the voltage on analog channel X (specified in Task
AnalogX) to a temperature based on the built in voltage to temperature equation
TP20B. The following is the actual equation:
System 5000
Managing Tasks 4-13
TM