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Deltabar S
Hauser
9
Explanation of terms
Explanation of the terms: Turn down (TD), set span and zero based span
Case 1:
•
Lower range value
Upper range value
Example:
• Lower range value (LRV) = 0 mbar
• Upper range value (URV) = 100 mbar
• Nominal value (URL) = 500 mbar
Turn down:
• TD = URL /
URV
:1
set span
:
• URV – LRV = 100 mbar
This span is based on the zero point.
P01-xxxxxxxx-05-xx-xx-xx-001
Example: 500 mbar sensor
Case 2:
•
Lower range value
Upper range value
Example:
• Lower range value (LRV) = –300 mbar
• Upper range value (URV) = 0 bar
• Nominal value (URL) = 500 mbar
Turn down:
• TD = URL /
(LRV)
= 1.67:1
set span:
• URV – LRV = 300 mbar
This span is based on the zero point.
P01-xMD7xxxx-05-xx-xx-xx-007
Example: 500 mbar sensor
1
Set span
2
Zero based span
3
Nominal value
i
Upper range limit (URL)
4
Nominal measuring range
5
Sensor measuring range
LRL
Lower range limit
URL
Upper range limit
LRV
Lower range value
URV
Upper range value
–500 mbar
0
+500 mbar
100
LRL
LRV
URL
URV
➁
➀
=
➂
➃
➄
–500 mbar
+500 mbar
LRV
URL
URV
➂
0
LRL
–300 mbar
➁
➀
=
➃
➄