Siemens SITRANS T4200, Operating Instructions Manual

Page: 67 / 100

Functions
9.20 Simulation (only in SITRANS TH300)
SITRANS TH200/TH300
66
Operating Instructions, 06/2010, A5E00393069-03
Simulation measurement input
Note
Simulation
 While simulation is activated, the transmitter will not react to changes in the sensor input
signals.

If the internal electronics temperature is to be simulated, the device parameters are not
allowed to be set to "Thermocouple with internal cold junction compensation" for this
purpose. In this case, the internal electronics temperature is a measured variable and
cannot be replaced by a simulation value.
● Simulation as fixed value
You can assign fixed simulation values in the parameters for both simulation paths
(primary measured value and electronics temperature) by taking the physical unit into
account. The analog output adopts a value according to the specification for the primary
measured value.
● Simulation with a periodic ramp function
As well as the adjustable fixed values, you can also assign a periodically recurring ramp
function in the parameters for both simulation paths. Adjustable start-of-scale and full-
scale values together determine the limits between which the simulation values move
with a rising or falling tendency. You can calculate the step width with the step number,
which is also adjustable.
Upper value – lower value
Increment
Step width =
The duration between two successive simulation values is defined by the step duration.
The analog output follows the simulated values in the simulation for the primary
measured value.