SiteView help
| SiteView help
|
A thermistor is a type of resistor whose resistance varies significantly with
temperature. All Site-Log data loggers except LRHT-1/2 have on-board thermistor
channel to record the ambient temperature. External thermistor channels of
LPTH-1 are for user to connect nearly any type thermistors. The Steinhart-Hart equation is widely used for thermistors for a wide range
of temperatures with high precision: When you use 'Temperature' equation for an external thermistor
channel, you need to specify a, b and c coefficients which you can get from the
thermistor manufacturer. The above screenshot is part of Logger Configuration dialog.
After you selected "Temperature" as the equaiton for channel #1 External
Thermistor, "Change Coefficients" button will display in "Action" column to
allow you change those a, b and c values: After you changed those values and click "OK" button the above dialog will
close. Then in the Logger Configuration Dialog once you applied the changes the
equation will be transferred to the logger. You can also let the system to do the calculation and fill the results to a,
b and c fields. Click "Calculate Thermistor Coefficients and Fill the Above
Fields" button and follow the on-screen instructions:
