Bedienungsanleitung SDT43
BDA Serie SDT43 (Stand Jan. 2018)
Seite 39
The menu span adjustment also has the choice of “
use process
”. The transmitter can be adjusted to
the span in a real process situation. When chosen, the transmitter will measure the pressure in an
actual process. This measurement will be used as the span value. (20 mA)
5.
Navigate to program point
1.02
, and push the button to enter the menu.
6.
Choose “
Use process
” , and push to confirm. The transmitter will display the actual measured value.
7.
Push the navigation button to confirm, and select
to save the setting.
8.
The transmitter will return to the main menu.
1.02 is the adjustment of the total span.
When a compound range must be adjusted (for example -1 till +3 bar), a span of 4 bar must be programmed.
The Zero (P101) must be set at -1 bar. The transmitter is adjusted at
- 1 bar = 4 mA
and
+3 bar = 20 mA
.
If the process temperature at -1 bar is above 20 °C another filling oil must be applied inside the transmitter (Option G26).
If the process temperature at -0,5 bar is above 60 °C another filling oil must be applied inside the transmitter (Option G26).
6.3
CANCEL MOUNTING POSITION EFFECT (4 mA)
All transmitters are vertically calibrated. If the transmitter is installed
horizontally, the transmitter has a small "mounting position" effect on
the zero (4 mA). The current value displayed, will be for example 4,020 mA instead of
4,000 mA. This effect can be neutralized within this menu.
3.
Navigate to program point
1.03 – MOUNT corr.
, and push the navigation button to enter the menu.
4.
Two choices appear on the screen: “
Set
” and “
Reset
”
Choosing
Set
will adjust the zero to 4,000 mA in the mounting position when applicable.
Select
Set
, and push the button to confirm.
The Save icon will be displayed to indicate that the setting is saved.
The transmitter will return to the main menu.
Choosing
Reset
will put the transmitter back to factory setting. (vertical adjustment 4 mA)
Select
Reset
, and push the button to confirm, the setting will be put back to
factory setting. The Save icon will be displayed to indicate that the setting is
saved.
The transmitter will return to the main menu.
CAUTION: Do not apply pressure while executing "Cancel mounting position effect"
6.4
DISPLAY SETTING OF UNITS
Various engineering units can be displayed on the display.
Factory setting = mbar
6.
Navigate to program point
1.04 – UNIT
, and push the navigation button to enter the menu.
7.
Several engineering units can be selected. Each selected engineering unit is automatically
converted to the correct value of the corresponding unit.
8.
Navigate through this menu and choose the required unit, push to confirm.
9.
The Save icon will be displayed to indicate that the setting is saved.
10.
The transmitter will return to the main menu, the measured reading will be displayed in the
chosen unit in the home screen.
CAUTION: The
selected pressure
unit is
only
visible on
the display
,
if
UNITS is chosen in program
point 1.09 – Readout.
6.5
OUTPUT SELECTION 4-20 mA or 20-4 mA
The transmitter is standard set to 4-20 mA.
i
1.03
Mount. corr.
1.04
Unit
1.05
Reverse mA
