Siemens SITRANS TK Bedienungsanleitung Seite 50

7NG3120, 7NG3121, 7NG3122
3 Commissioning
The transmitter's parameters must be chosen to suit the requirements of the task in
hand. Make sure that the parameters and the data on the rating plate correspond.
Close the cover of the terminal housing after connecting the sensor and the
auxiliary power supply. When the auxiliary power is activated, the transmitter
assumes operation after a start up time of around 3 seconds.
3.1 Functions
When using SITRANS-TK, the following functions can be executed via the SIPROM
TK parameterisation software, or, when using SITRANS TK-H, they can be
executed via the SIMATIC PDM parameterisation software or the hand-held
communicator (for a description, see Chapter 4.2 Operation with the hand-held
communicator)
- Set the high output current limit
- Store the measuring point identification data
- Set the sensor type and the type of input connection
- Set the measuring range, the unit and the attenuation
- Set the output current in the event of a fault
- Open-circuit monitoring
- Current sensor function (SITRANS TK-H)
- Sensor trimming (SITRANS TK-H)
- Restore works calibration (SITRANS TK-H)
- Measure line resistance
3.2 Output current in the event of a fault
The sensor lines and the electronic circuitry of the transmitter are constantly
monitored. In the event of a fault, the output current is set to 3.6 or 23.0 mA. The
respective value can be set.
3.3 Open-circuit monitoring
Open-circuit monitoring takes place during resistance measurement, resistance
thermometer measurement and thermocouple measurement, but not voltage
measurement.
50
Instruction Manual
SITRANS TK/TK-H
C79000-B7174-C12-07