Emerson Rosemount 228 Reference Manual page 33

3.
4.
Rosemount 228 Sensor
Keep temperature compensation with the transmitter turned on. Confirm that the
temperature measurements in both process and referee instruments are accurate,
ideally to within ±0.5 °C.
Place the sensors in the grab sample.
Wait until the readings are stable before starting the calibration.
Adjust the reading from the process analyzer to match the conductivity measured
by the referee sensor.
Calibration
27