# CALIBRATION OF DP LEVEL TRANSMITTER (SUPPRESSION) :

Updated: Apr 9

**In this article, we will we discussing Calibration of the DP transmitter when the transmitter installed below 0% level.**

**(1) DRY LEG**

**Let, consider the above-stated example in which we have a height from the centre to centre tapping is 8360 mm and the height from 0% to HP connection is 310mm.**

__1. Calculate Range__

** Range = centre to centre (0% to 100%) * S.G.**

** = 8360 * 1.21**

** Range = 10115.6 mmH20**

__2. Calculate LRV__

** LRV = HP -LP**

** = (1.21 * 310) - 0**

** LRV = 375.1 mmH20**

__3. Calculate URV__

** URV = LRV + Range**

** = 375.1 + 10115.6**

** URV = 10490.7 mmH2o**

**(2) WET LEG**

**Now let take same above example with this time for wet leg having a** **specific gravity of 1.25 **

__1. Calculate Range__

** Range = centre to centre (0% to 100%) * S.G.**

** = 8360 * 1.21**

** Range = 10115.6 mmH2o**

__2. Calculate LRV __

** ****LRV = HP - LP **

** = (310 * 1.21) - (8880 * 1.25) **

** (Due to wet leg add height
310+8360+210 = 8880)**

** = 375.1 - 11100**

** LRV = -10724.9 mmH2o**

__3. Calculate URV__

** ****URV = LRV + Range**

** = -10724.9 + 10115.6**

** URV = -609.3 mmH2o**

**After calculation of LRV and URV put this value in the transmitter.**