Answer / carl_ellis

how to calculate flow range in DP tx

A flow range is calculated for a primary flow element
according to design flow conditions. The result of the
calculation is a maximum flow rate at a given DP span.

The DP transmitter does not 'calculate flow'. The DP
transmitter is spanned to the value in the calculation.
The DP transmitter can extract the square root from the
normalized percentage of the DP. That square root value
can be assigned flow rate values in fieldbus transmitters.
Or the square root value can be assigned flow rate values by
the local indicator on the DP transmitter. But the square
root 4-20mA output is just a signal representing the span of
the flow rate. Flow rate values are assigned by scaling in
the receiver.

Carl Ellis
Measure First

What is deffrence between Battery and capacitor

3 Answers   Siemens,

---

Draw a complete P&ID of a flow suction tank indicating all control & protection equipment. Indicate all its inlets and outlets. Explain the controls for this system

0 Answers  

---

How much Resistance Show by RTD(PT100) when it is installed in process(Consider Process Fluid temp 29 Deg C)?

5 Answers  

---

1)What is the suitable MOC for flow meters working at temperature between 200 - 250 cen. 2)In which application the mass flow meters are not advisable 3)Is it advisable to use radiation type or radar type instrument for non contact application

1 Answers  

---

What is the purpose of LO Overhead tank in turbines.

0 Answers   ADMA OPCO,

---

---

What does it mean 3/2 sov

5 Answers  

---

Please asked me How calculate DCS controller memory.

0 Answers   Yokogawa,

---

what is the PC interface and software for connection to ABB logic module “ LM011-CE18RAC “ ( for Programming ) ??

0 Answers  

---

I have flow transmiter DP range is 0 to 5000mmwc,(convert) Display to be show in m3/Hr.

3 Answers   Orient,

---

what is difference between Floating D.C.Voltage and Fixed D.C.Voltage?

2 Answers  

---

Specify for Cables - Flame Retardant and Fire Resistant?

0 Answers  

---

If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?

1 Answers   Process Control Technologies,

---