Trimming The Lower Sensor Calibration (Trim) Point; Trimming The Upper Sensor Trim Point - Siemens SITRANS T Series Operating Instructions Manual

9.13.3

Trimming the lower sensor calibration (trim) point

Trimming the lower sensor trim point
With this function:
● You apply the process variable, e.g. temperature or resistance - on which the lower
sensor calibration should be performed - to the transmitter input.
● You can use the operating software to instruct the transmitter to accept this process
value. SITRANS TH200 uses the operating software SIPROM T; SITRANS TH300 uses
the operating software SIMATIC PDM or the HART communicator.
The acceptance of this process value is represented by an offset shift to the characteristic
curve, see B in the "Sensor calibration" diagram.
9.13.4

Trimming the upper sensor trim point

Trimming the upper sensor trim point
With this function:
● You apply the process variable, e.g. temperature or resistance - on which the upper
sensor calibration should be performed - to the transmitter input.
● You can use the operating software to instruct the transmitter to accept this process
value.
The acceptance of this process value is represented by a gradient correction to the
characteristic curve, see C in the "Sensor calibration" diagram. The lower sensor trim point is
not affected by this.
SITRANS TH200/TH300
Operating Instructions, 08/2015, A5E00393069-04
Functions
9.13 Sensor calibration
49