Siemens SITRANS F TRANSMAG 2, Руководство по эксплуатации, Страница: 56 / 126

If the electrodes have no contact with the medium, the alarm signal "Tube empty" is triggered
through the digital outputs. This alarm is also triggered in the case of an insulating coating on
the electrodes.
WARNING
This message does not mean that the tube has actually run empty. Therefore you must make
sure that the pipeline is actually empty before your remove the tube!
Note
Response threshold and timing behavior of the "immersion check" function depend on the
conductivity of the medium and the nominal width and cladding of the sensor (min 50μS/cm).
The switching threshold can be adapted to these conditions, if necessary (see menu item 6.7.5).
Device test (Menu item 2.4)
The device test comprises the following test components:
• Self test, menu item 2.4.1
The self test routines are inserted in the current measurements and are completed after
about 60 seconds. If there is no error, "OK" is displayed, otherwise "not OK". The type of error
can then be read out in the menu item "2.1 Device status".
• Display test, menu item 2.4.2
The LCD is checked with this menu item. The display is initially dark for approx. 5 seconds and
then bright for approx. 5 seconds.
Simulation flow (Menu item 2.5.1)
The flow can be simulated in a range from ±110 %.
Here you also have the possibility of checking displays, totalizers, limit values and outputs in
certain measuring ranges. The running simulation is indicated by a flashing ’F’. It ends at the end
of a previously set period or after entering the ’End’ parameter in this menu item.
Simulation outputs (Menu item 2.5.2, 2.5.3, 2.5.4)
With this function you can check the signal circuits of the analog output, the digital outputs 1
and 2 as well as the flow.
In the individual menu items, you select the value to be simulated with the and operating
elements. You activate the setting by confirming the selected value with the operating element
. The running simulation is indicated by a flashing ’F’. You end simulation of the output signal
by actuating the operating element (exit the menu item).
Digital output 1 must be configured for the "Alarm" function for simulation of the alarm signal
(setting in the menu item "4.2.1 Function").
Functions
8.3 Function Group Diagnostics
TRANSMAG 2 with MAG 911/E
56
Operating Instructions, 03/2021, A5E00102775-AC