Siemens SITRANS P500, Руководство по эксплуатации, Страница: 70 / 238

Operate
6.2 Parameter description
SITRANS P500 with HART
70
Operating Instructions, 12/2014, A5E02344528-09
Purpose: Setting the start of scale value (MA)
Description: This parameter allows you to set the MA. By inputting the pressure MA and
pressure ME, a rising characteristic results if MA < ME. A decreasing char-
acteristic results if MA > ME.
Combinations that result in a range that is smaller than the smallest permis-
sible range (depending on the measuring cell) will be rejected.
"1.1.3.1.3 Setting URV"
Factory setting: Upper measurement limit, or as specified in order
Setting range: Sensor limits
Purpose: Setting the full scale value (ME)
Description: This parameter allows you to set the full scale value. By inputting the pres-
sure MA and pressure ME a rising characteristic results if MA < ME. If
MA > ME, this results in a falling characteristic.
Combinations that result in a range that is smaller than the smallest permis-
sible range (depending on the measuring cell) will be rejected.
"1.1.3.2 With Pressure"
"1.1.3.2.1 Pressure Unit"
Factory setting: mbar
Setting range: inH
2
O, inHg, ftH
2
O, mmH
2
O, mmHg, psi, bar, mbar, g/cm
2
, kg/cm
2
, Pa, kPa,
HPa, Torr, atm, MPa, inH
2
O (4 °C), mmH
2
O (4 °C)
Purpose: Selection of the unit for the pressure parameter
Description: This parameter allows you to select the unit for the measured pressure
value. The parameters associated with this unit are automatically converted
to the new unit.
"1.1.3.2.2 Set LRV with Pressure"
Setting range: Within sensor limits
Purpose: Setting the start of scale value
Description: Use this parameter to set the start of scale value to the current pressure
value. The change to the start of scale value causes a respective change to
the full scale value, so that the range remains constant. Should the move-
ment of the full scale value violate an upper or lower sensor limit, setting of
the start of scale value is rejected.