1. Categories >> Engineering >> Instrumentation
  2. Suggest New Category

why we are using negative range like -750 to 0 mmwc in
closed tank?and what is the reason can you explain clear?

Question Posted / navodit

Answer Posted / navodit

whenever there is close tank, there is vapour which will
condensate in top taping tubing(LP taping), which will
remain there even after empty tank, that time output
pressure will be in negetive(as HP taping is empty and LP
taping has filled with condensate), as LP line is filled.
so negetive will shove 4 mA at negetive value

Is This Answer Correct ?    11 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is Cavitation in a control valve?

1557

How we can check the 2 wire proxy switch? & how it is connected to DI MODULE OF PLC?

2019

What is the start up procedure of desalter

3040

how do u calibrate the vacuum transmitter if it shows more reading

1585

Yokogawa CENTUMVP R6.09 unable to download to Engineering Station with ExaOPC R3.75 The issue is when I try to download the common project section to the Engineering Station (STN) from the HIS in System View, it is unable to connect. The error displayed is: WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. STN0149 ---- ERROR = 2 WARNING = 1 ---- Background: >Updated the ExaOPC software on the STN from 3.60 to 3.75 >STN operating system is Windows Server 2008 R2 >HIS operating system is Windows Server 2016 Stanard Solutions attempted include: >Ensuring all IP addresses are correct and all networked devices can be pinged. >The ability to ping a device using its host name from another device ( from HIS) >Ensure both devices firewalls are disabled. >The antivirus installed on the STN is disabled. >Ensuring both devices are within the same workgroup. >Added both devices to each other's Host and LMHost files. >Running IT Security tool after changing any administrative settings.

1632




Displace type LT to be calibrated in workshop, wt. 40, dia- 60 mm, density- 0.8kg/cm3.

1437

1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC

2074

What is Predictive Maintenance

742

How to calibrate level transmitter with use of HART?

2174

Explain plc level and its type?

748

How to calibrate capillary type level transmitter

1198

Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.

1497

What is hp & mp seperator .& what is its working principle ?

1821

Which are all the commonly used Bordon tubes in the pressure gauges. Do any one use ASTM A 312 tubes for this purpose?

1317

give me the formula for analog to digital converter and also d to a converter

2360