How we can re-range the DP transmitter, range is -0.5 to 2.0bara. new range is -0.5 to 5 bar
Answers were Sorted based on User's Feedback
Something is wrong with the stated situation. The stated range is in -0.5 to 2.0 bara, where bar is bar absolute.
An absolute pressure references absolute zero (a hard vacuum).
No measurement can be made below zero bar absolute because it violates the laws of physics.
While a DP transmitter can not make a negative absolute measurement, it can make a negative differential measurement where the low side pressure is higher than the high side pressure.
The method of changing the differential range depends on the brand/model of the transmitter.
- zero and span adjusting pots
- zero and span push buttons
- local indicator/push buttons
- HART communicator/modem-software
The first two require an applied reference pressure for zero and span.
The 3rd and 4th options might have a choice of applied pressure or entering values for zero and span.
Some DP transmitters do not have the same accuracy in the negative range as they do in the positive range.
Carl Ellis
Measure First
Is This Answer Correct ? | 4 Yes | 1 No |
Which language of programing is popular? how can i learn it ?
1.what is beta in control valves? 2.what is the condition followed by light in LASERs? 3.1kg/cm2=?psi 4.Integral action reduces what? 5.about vena contracta 6.a simple RC circuit 7.thermistor material's temp coefficient of resistance 8.if wave passes through the thicker area of a chord to a thinner area what changes will occur to wavelength? 9.if 4-20 mA represents 0-10 kg/cm2 what will be the current when pressure is 5 kg/cm2.................
T.x range -0.1 to 0.2 milibar,so how much mili ampear at 0.1 milibar?
What is the difference between dry contact and wet contact?
Why we use 4 - 20 ma?
sir,would you please send me the Hindustan petroleum corporation limited papers(HPCL).my e-mail ID is ujjwal_sharma1983@yahoo.com
What is limitation of the ht.of the displacer of a level trol?
Difference HAZOP and HIRA
What are the characteristics of Control Valve
if change the pid in D value so what action.
how to convert transmitter milliamps output to like temp,pressure etc.....
Is it possible to drill additional gland hole in EExd or EExe JBs? What are the points to take care?