Answer Posted / rakesh

Hysteresis results from the inelastic quality of an element
or device. Its effect is combined
with the effect of dead band. The sum of the two effects may
be determined directly from the
deviation values of a number of test cycles, and is the
maximum difference between
corresponding upscale and downscale outputs for any single
test cycle. Hysteresis then is
determined by subtracting the value of dead band from the
corresponding value of hysteresis
plus dead band for a given input. The maximum difference is
reported.
The difference may be expressed as a percent of ideal output
span.
Example: The hysteresis is 0.2% of output span.

If P will increase then what will happen with PID?

5975

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OBJECTIVE TYPE QUESTIONS OF ANALYTICAL INSTRUMENTATION

10665

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we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

1654

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flow transmeter accuracy 0.075% of full scale & find ucertainty is 0.025 % so what is maximum limit band of uncertainty

2254

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1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?

2131

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why we us isolation barrier in hazardous area how it works to protect the area and please clarify its current flow.

1894

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why we are using digital signals for I/O & how to measure this signals is getting or not ?

1920

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How can you add value to this Industry if offered the job?

1519

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What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?

1879

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Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

4590

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How r the calculation of process line mpm.

4725

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what is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

1927

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How process line mpm calculation is done?

1339

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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.

2138

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What is difference between differential pressure & delta pressure?

1029

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