Siemens 7MF4033 series, Руководство пользователя

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UMSITRPDS3-1 On-Line Operation
November 2010
6-13
Change the display, when necessary, by use of mode 13, so that the physical unit selected in mode 14
is in display mode.
Calculate the difference between the measured pressure and the known and sufficiently stable
reference pressure. (See the footnote on the previous page.)
Change to mode 5. Add the calculated difference with the correct sign to the displayed measured start
position. Enter this calculated value using the
( and ' pushbuttons and save the value by pressing
the M pushbutton.
6.2.6 Fixed Current Output
The transmitter can be switched to a fixed current output mode for loop troubleshooting. Here, the analog
output current will not vary with process pressure or level variations.
The fixed current output can be set locally or remotely to 3.6 mA, 4.0 mA, 12.0 mA, 20 mA, or 22.8 mA.
Other values can be set using the HART Communicator.
1. Press the M pushbutton until mode 8 is shown on the transmitter display.
2. Set zero by simultaneously pressing the ( and ' pushbuttons for 2 seconds; the selected current will
appear in the display.
3. Select the desired current by pressing the
(
or
'
pushbutton.
4. To cancel the fixed current mode, press the M pushbutton.
6.2.7 Failure Current
The failure current is the current that is to be output in the event of a fault or alarm. The default values are
3.6 mA and 22.8 mA. These values can be changed using the HART Communicator.
1. Press the M pushbutton to display mode 9.
2. Select the desired fault current by pressing the ( or ' pushbutton.
3. Press the M pushbutton to save the selection and exit mode 9.