Answer / yomama

Your question suggest you are using a "Differential Pressure
Transmitter" in which case since the -10 Bar vacuum is
applied to both the Hi and Low legs the -10 Bar vacuum is
neutral the Transmitter

In that case we merely multiply the distance (850 mm) x (.73
SG) = 620.5

Answer / aftab ahmed mazari

If you installed the remote seal transmitter at flanges,
then in case empty tank /vessel, the transmitter will
showing -mA. so do the followings:
1. Make transmitter 4 mA in this case(without any pressure,
only lower low leg remote seal pressure acting)
2. Apply 850 x 0.73 =620.5 mm of water to high side of
transmitter flange and set transmitter out put 20 mA.
aftabmazari@yahoo.com

Answer / yomama

Your question suggest you are using a "Differential Pressure
Transmitter" in which case since the -10 Bar vacuum is
applied to both the Hi and Low legs the -10 Bar vacuum is
neutral the Transmitter

In that case we merely multiply the distance (850 mm) x (.73
SG) = 620.5

Answer / ys

close the both hp and lp iso valve(so that any pressure
should not act on tx diaphragm). now measure the input
pressure in mm by connecting hand communicator to tx.. this
is the LRV.now measure span(ie here it is 850mm).multiply
span with liquid density(ie 850*0.73).we will get 620.5.
this is your URV

anybody having Qatar Petroleum questions for instrument Technician offshore ....please send me

0 Answers  

---

what is modbus?and why use it?what benifit

2 Answers  

---

Furnace draft transmitter range is -50 to +50 mmwc. why the impulse line connected in hp side?

2 Answers   Arena,

---

What is the cascade control

0 Answers  

---

what is unit and element of viberation?

1 Answers   Kentz, KOC,

---

if we have 450 mm heigth boiler drum level ,so what is span & zero value for a dpt tranmitter

4 Answers  

---

When doing a liquid seal on a differential flow transmitter , most of the time the sealing liquid will be heavier then the process fluid. For wich application will the sealing liquid be lighter than the process fluid if transmitter is mounted below the process line.

0 Answers   Chevron,

---

When a timer is placed in RS Logix 5000 with preset value less than its scan time it is malfunctioning. i.e., if the preset is set to 30ms still the timer TT bit is counting till 150ms(its scan time). Any solution for the problem?

2 Answers   Balco,

---

In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

0 Answers  

---

What happen if I install my pressure transmitter below the elevation of pipe in natural gas service?

0 Answers  

---

What is the difference between mmwc and mmwg?

0 Answers  

---

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

5 Answers  

---