**The formulas for calculating transmitter URV and LRV are as follows:**

**HP Side or LRV or Transmitter 0% = Hmin.S1 – X.S2**

**LP Side or URV or Transmitter 100% = Hmax.S1 – X.S2**

**Where**

S1 = Specific gravity of tank liquid.

S2 = Specific gravity of seal liquid.

Hmin = Equivalent head of water at minimum level.

Hmax = Equivalent head of water at maximum level.

X = Distance between transmitter and tapping point.

NOTE:

1. The Parameters H,X can be entered in any units like mmh20, inh20 but must be same

2. If you are using direct tubing from tapping point to transmitter without filling any additional liquid (Like water) that means you are not using any special seal liquid, so S2=S1, Here Specific gravity of Process liquid only considers for both S1 & S2. Hence S1=S2.

The Following tables specifies the seal liquid constant values:

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## 11 comments

Its a wonderful tool.

It takes less than 2 minutes to calculate the instrument range.

Thanks

Anupam

pls post procedure for calibration closed tank dp level transmitter

Hi Arun,

Thanks for the comment. Closed tank DP level transmitter dry & wet leg calibration procedures available here

https://instrumentationtools.com/closed-tank-dp-type-level-measurement-with-dry-leg-and-transmitter-installed-below-tapping-poin/

https://instrumentationtools.com/closed-tank-dp-type-level-measurement-with-wet-leg-and-transmitter-installed-below-tapping-poin/

Thanks,

S Bharadwaj Reddy

Mr Bhardwaj Reddy you have done very good job,

Manchi pani chesaru

Closed Tank DP Type Level Measurement with wet leg and transmitter installed above tapping point is it possible

Definitely Yes, Possible. But in the above figure it is shown the transmitter installed above the tank i.e. only for understanding purpose. In Practice, the transmitter installed just above tapping point only not above the tank. Thanks

Good Info……Keep it uP…

thank sir,it very usefull sir,

closed tank level tx install below& above tapping point

great job sir, great indian app

Dear Sir, Can you explain me how to Calibrate Transmitter like FT PT LT in very easy way.

HI MR. S BHARADWAJ REDDY, GOOD AFTERNOON AND GREETING,

WILL YOU PLEASE MASG ME ERS(ELECTRONIC REMOTE SENSOR ) TYPE LEVEL TXM, ITS INSTALLED AT FIRST PLATFORM OF DRUM. ITS BEFORE GOOD WORKING NOW, ITS START PROBLEM. HART NOT CONNECT AND DEVICE ALWAYS SHOW DEVICE NOT FOUND, TXM DISPLAY SHOW. WHEN EVER WE CONNECT HART.

WILL YOU PLEASE GIVE ME ANY SOLUTION . ALL WIRE AND EARTHING IS GOOD, NO WIRE CUT ALSO. PANEL SITE ALSO GOOD, JB WIRE ALSO GOOD.