Siemens SITRANS P Instruções de Operação Página 75

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Operating functions
Note
Zero point calibration
For absolute pressure transmitters, the start of scale value is at vacuum.
A zero point calibration with transmitters which do not measure absolute pressure leads to
faulty settings.
Table 6-4 Operating functions using keys
Function Mode Key function Display, explanations
[M] [↑] [↓] [↑] and [↓]
Measured value The
modes
are
select
ed
here.
The current measured value is displayed as you
have
adjusted it in the "Measured value display,
mode 13" function.
Start of scale value
(only in "Pressure"
measuring mode)
2 Current
higher
Current
lower
Set to 4 mA Output current in mA
Full scale value
(only in "Pressure"
measuring mode)
3 Current
higher
Current
lower
Set to 20 mA Output current in mA
Electrical damping 4 Damping
higher
Damping
lower
Set to 0 Time constant T63 in seconds
Adjustment range: 0.0 s to 100.0 s
Start of scale value
in
the so-called blind
adjustment
5 Pressure
higher
Pressure
lower
Set the start
of scale value
to 0
Start of scale value in the selected pressure unit
Full scale value in
the so-called blind
adjustment
6 Pressure
higher
Pressure
lower
Set the full
scale
value to
upper
measuring
limit
Full scale value in the selected pressure unit
Zero point
calibration (position
correction)
7 Correction
value
higher
Correction
value lower
execute Ventilate the transmitter for gauge pressure,
differential pressure, flow rate or level.
Evacuate the transmitter for absolute pressure
(< 0.1‰ of the measuring span).
(Start of scale value remains unaffected)
Measured value in pressure unit
Current transmitter 8 Current
higher
Current
lower
switch on constant output current in mA
"3.6"; "4", "12", "20" or "22.8"
Switch off using the [M] key.
Output current in
case of fault
9 Switch between lower
fault current and upper
fault current.
lower fault
current
selected output current possible: Fault current
limits adjusted by user
Operation
6.5 Local operation
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 73
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