Endress+Hauser Ceraphant PTP31B - Turn down Calculation

Document information Ceraphant PTP31B, PTP33B
8 Endress+Hauser
1.5 Turn down calculation
LRV
URLURV
LRL
1 = 2
3
A0029545
1 Calibrated/adjusted span
2 Zero point-based span
3 URL sensor
Example
• Sensor:10 bar (150 psi)
• Upper range value (URL) = 10 bar (150 psi)
Turn down (TD):
• Calibrated/adjusted span: 0 to 5 bar (0 to 75 psi)
• Lower range value (LRV) = 0 bar (0 psi)
• Upper range value (URV) = 5 bar (75 psi)
TD =
URL
|URV - LRV|
TD =
10 bar (150 psi)
= 2
|5 bar (75 psi) - 0 bar (0 psi)|
In this example, the TD is 2:1.
This span is based on the zero point.