Siemens SITRANS P500, Руководство по эксплуатации, Страница: 107 / 238

Operate
6.2 Parameter description
SITRANS P500 with HART
Operating Instructions, 12/2014, A5E02344528-09
107
"2.4.3.1.2 20 mA"
Purpose: Digital analog converter calibration at 20 mA
Description: Trimming is carried out in 3 steps:
•
"2.4.3.1.2.1 Enable 20 mA fixed"
This menu command causes the pressure transmitter to output 20 mA
constant current.
• "2.4.3.1.2.2 Enter value"
This reads the indicated current value on a connected ammeter, and en-
ters it in the menu.
•
"2.4.3.1.2.3 Perform Gaintrim"
The pressure transmitter carries out the calibration and uses this value
for a gradient correction of the current.
"2.4.3.2 Lower Sensortrim"
Purpose: Specification of the lower sensor trim point
Description: Trimming is carried out in three steps:
•
"2.4.3.2.1 Sensorvalue"
Enter the pressure value that you have established.
• "2.4.3.2.2 Perform Trim"
The device performs an offset correction so as to calibrate to your value.
•
"2.4.3.2.3 Display Lower Trimpoint"
The device displays the active trim point.
See also
Trimming the sensor (Page 161)
"2.4.3.3 Upper Sensortrim"
Purpose: Specification of the upper sensor trim point
Description: Trimming is carried out in three steps:
• "2.4.3.3.1 Sensorvalue"
Enter the pressure value that you have established.
•
"2.4.3.3.2 Perform Trim"
The device performs a correction to the characteristic gradient so as to
calibrate to your value.
• "2.4.3.3.3 Display Upper Trimpoint"
The device displays the active trim point.
See also
Trimming the sensor (Page 161)