Siemens SITRANS T4200, Operating Instructions Manual

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Functions
9.9 Calculation of differential value/mean value
SITRANS TH200/TH300
Operating Instructions, 06/2010, A5E00393069-03
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9.9 Calculation of differential value/mean value
The differential and averaging circuit interfaces have the following special features compared
to the standard connection:
Setting the start of scale value and full scale value:
● Enter the start of scale value and full scale value for both individual sensors first. The
start of scale value and full scale value are the same for both sensors. It is not possible to
assign different measuring ranges for the individual sensors in the parameters. Tip: use
the largest measuring range.
● Following this, assign the parameters for the start of scale value and full scale value for
the differentiation or the average value measurements.
Sensor calibration:
● Trim the individual sensors at the selected limits of the measuring range. The
differentiation or average set in the parameters cannot be trimmed.
9.10 Electrical damping
You can set the filter time constant of electrical damping to a point within a range from 0 to
30 s.
9.11 Current sensor function (only in SITRANS TH300)
● You can switch the transmitter to constant current mode for test purposes. In that case,
the output current no longer corresponds to the process variable.
● Using the operating software, you can set the value of the constant current for:
– 4 mA
– 20 mA
– "Other value"; this value can be selected at will, the setting range is between 3.6 to
23 mA.