search

Siemens SITRANS P Manual de usuario Pagina 110

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 222
  • Tabla de contenidos
  • MARCADORES
    • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 109
On-Line Operation UMSITRPDS3-1
November 2010
6-12
6.2.5 Zero Adjustment (Position Correction)
The zero error resulting from a non-vertical installation position can be easily corrected. This procedure
can be performed locally using the magnetic pushbuttons or remotely using the HART Communicator.
Section 7 Calibration and Maintenance discusses the cause of this zero error.
IMPORTANT
To zero an absolute pressure transmitter, a vacuum must be applied! The zero
adjustment of a ventilated absolute pressure transmitter will cause an erroneous
zero set.
1. Ventilate or evacuate the transmitter.
• Ventilate for pressure, differential pressure, flow, and flanged level transmitters.
• Evacuate for absolute transmitters to <0.1% of the measuring span.
2. Select mode 7 by pressing the mode pushbutton.
3. Set zero by simultaneously pressing the ( and ' pushbuttons for 2 seconds; 0.000 will appear in the
display.
4. Press the M pushbutton until no mode number is shown. An output current of 4 mA is generated.
6.2.5.1 Zero-Point Alignment at Absolute Pressure
Performing a position correction to an absolute pressure transmitters may not properly calibrate zero if a
vacuum is not available as the reference pressure. In this case, the three options below are available.
• Perform a lower sensor alignment using the Communicator.
Carry out a lower sensor alignment at an applied, known and sufficiently stable reference pressure.
2
With this type of alignment, the digital displayed measured value is adjusted. The output current is
relative to this displayed value.
• Set the current in mode 2 of local operation.
Use the formula below to calculate the current to be set for a known, sufficiently stable reference
pressure. (See the footnote below.)
mAmA
pp
pp
I
zofso
setptref
416
)(
)(
+∗
−
−
=
In model 2, enter this current with the ( and ' pushbuttons and save the value by pressing the M
pushbutton.
With this setting, the digital displayed value is not changed.
• Change the value of the start of measurement in mode 5 of local operation:
2
If the applied process pressure is known and sufficiently stable, it can be used instead of the reference pressure.
Enter mode 4, when necessary, and enter an appropriate damping value.
Vista de pagina 109
1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 221 222

Comentarios a estos manuales

Sin comentarios
Relacionado con productos y manuales para De medición, control y control Siemens SITRANS P
De medición, control y control Siemens HydroRanger 200 Manual de usuario   (4 paginas)
De medición, control y control Siemens sitrans LU01 Manual de instrucciones   (114 paginas)
De medición, control y control Siemens sitrans LU01 Manual de usuario   (12 paginas)
De medición, control y control Siemens BTC-BR Manual   (264 paginas)
De medición, control y control Siemens sitrans LU01 Manual de usuario   (5 paginas)
De medición, control y control Siemens XT75 Especificaciones   (58 paginas)
De medición, control y control Siemens HydroRanger 200 Manual de instrucciones   (256 paginas)
  • EYEZONE Wet Sounds Punkt Char-Griller Elmomc
  • Coleman Linternas D-Link Cámaras De Seguridad 3M Proyectores de datos Indesit Lavadoras Smeg Lavaplatos
  • Radio-shack 22-218 Petzl OK TRIACT-LOCK Samsung SM-G903F Daewoo RC-350 Cisco NM-8AM-V2=
  • Minox 35 GL El manual del propietario Beko TSE 1260 Manual de instrucciones Dell PowerEdge T710 Manual de usuario AEG L87495XFL Manual de usuario Electrolux EW6F328WU Manual de usuario