Deltabar S PMD70/75 FMD76/77/78
Deltabar S, PMD70, PMD75, FMD76, FMD77, FMD78 - from AoteWell
Deltabar S, PMD70, PMD75, FMD76, FMD77, FMD78 - from AoteWell
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<strong>Deltabar</strong> S<br />
Explanation of terms<br />
Explanation of the terms "turn down (TD)",<br />
"set span" and "zero-based span"<br />
Case 1:<br />
• Lower range value (LRV) Upper range value<br />
(URV)<br />
Example:<br />
• Lower range value (LRV) = 0 mbar<br />
• Upper range value (URV) = 100 mbar (1.5 psi)<br />
• Nominal value (URL) = 500 mbar (7.5 psi)<br />
Turn down:<br />
•TD = URL /URV5:1<br />
Set span:<br />
• URV – LRV = 100 mbar (1.5 psi)<br />
This span is based on the zero point.<br />
➀ = ➁<br />
LRL LRV URV URL<br />
–500 mbar 0 100 +500 mbar<br />
➄<br />
➃<br />
Example: 500 mbar (7.5 psi) measuring cell<br />
➂<br />
P01-xxxxxxxx-05-xx-xx-xx-001<br />
Case 2:<br />
• Lower range value (LRV) Upper range value<br />
(URV)<br />
Example:<br />
• Lower range value (LRV) = –300 mbar (4.5 psi)<br />
• Upper range value (URV) = 0 bar<br />
• Nominal value (URL) = 500 mbar (7.5 psi)<br />
Turn down:<br />
•TD = URL / (LRV) = 1.67:1<br />
Set span:<br />
• URV – LRV = 300 mbar (4.5 psi)<br />
This span is based on the zero point.<br />
LRL<br />
LRV<br />
–500 mbar 0<br />
+500 mbar<br />
–300 mbar<br />
➀ = ➁<br />
URV<br />
➄<br />
➃<br />
Example: 500 mbar (7.5 psi) measuring cell<br />
URL<br />
➂<br />
P01-xMD7xxxx-05-xx-xx-xx-007<br />
1 Set span<br />
2 Zero-based span<br />
3 Nominal value i upper range limit (URL)<br />
4 Nominal measuring range<br />
5 Sensor measuring range<br />
LRL Lower range limit<br />
URL Upper range limit<br />
LRV Lower range value<br />
URV Upper range value<br />
Endress+Hauser 9<br />
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