Commissioning; Functions; Output Current In The Event Of A Fault; Open-Circuit Monitoring - Siemens SITRANS TK-L 7NG3120-0 Betriebsanleitung

Operating instructions
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 corre-
spond.
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 10 seconds.
3.1

Functions

When using SITRANS TK-L, the following functions can be executed via the
SIPROM TK parameterisation software:
- Set the upper/lower output current limit
- Store the measuring point identification data
- Set the type of input connection (two-, three- or four-wire connection)
- Set the measuring range, the unit and the attenuation
- Set the output current in the event of a fault
-

Open-circuit monitoring

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 3.5 or 23.0 mA. The
respective value can be set.
3.3 Open-circuit monitoring
Open-circuit monitoring takes place during resistance thermometer measurement
in two-, three- and four-wire connection.
3.4

Line compensation

Line compensation is necessary for a two-wire resistance thermometer
measurement.
Line compensation is set by numerically specifying the measured line resistance
(sum of the foward and return conductors).
SITRANS TK-L
A5E00095604-01
7NG3120-0, 7NG3122-0
31