If range of 3-15 psi, a multiplying relay with a 1:2 ratio would give what output pressure for 6 psi input?
1 3539If you calibrate a pneumatic pressure transmitter, how many adjustments are normally necessary or mandatory?
1 3721Post New Instrumentation Questions
in which principle pressure tx,level tx ,flow tx,temp tx ,control valve works?
What you mean by multi stage control vavles?
Explain Gas Turbine startup and shutdown sequences
what about your moleg in pogrees with company
what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .
Why is the orifice tab provided?
What is the purpose of bypass valve across AS valve.
line up procedure for dp type flow transmitter?
What is wet leg condition and why is it used?
What is Span Error
Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =
what is compensation? temprature & pressure
What is sensitivity in vibration probes..?
please any body have most important data for study for saudi aramco test of instrument QC thanks email shahnaveedullah@gmail.com
use of split range ? where it is used ? in which control loop it is used ?
