Revision 1
STT700 Series HART/DE Option User’s Manual
Page 81
7 HART Calibration
7.1 About This Section
This section provides information about calibrating a transmitter’s analog output and measurement
range. It also covers the procedure to reset calibration to the default values as a quick alternative to
measurement range calibration.
This section includes the following topics:
How to calibrate a transmitter’s analog output circuit using a communicator
How to perform a two-point calibration of a transmitter
How to perform a correct reset to return a transmitter calibration to its default values.
7.1.1 About Calibration
The STT700 SmartLine Transmitter does not require calibration at periodic intervals to maintain
accuracy. If a recalibration is required, we recommend that perform a bench calibration with the
transmitter removed from the process and located in a controlled environment to get the best accuracy.
Before recalibrating a transmitter’s measurement range, please calibrate its analog output signal.
7.1.2 Equipment Required
Depending on the selected calibration, you may need any of the following test equipment items to
accurately calibrate the transmitter:
Digital voltmeter or millimeter with 0.01% accuracy or better
MC Toolkit calibration standard temperature source with a 0.02% accuracy
250 ohm resistor with 0.01% tolerance or better.