Answer / dinesh

Solenoid valve operates with 24VDC supply . It is used to actuate the pneumatic supply to the actuator when the command is given for open/close to open the ESD/XSY valve. Solenoid valve of some types contains a reset button on their body which will be pressed by the operator in field to open the valve when an open command is given.

how to change measuring units from mmwc to cubm/h in rosemount air flow transmitter with hart communicator fluke 744

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I work on a electronic positioner transmitter 4211 at the field.I connect my multimeter in series to get the current output then I calibrate it to 4ma in 0% of position of the valve and 20ma in 100% position of the valve.My problem is in the field I get the correct output current based on my multimeter but in the dcs they only receive 40% in a output 20ma of this positioner.Then I try to simulate in this analog card and they receive the equivalent percent on the value that I simulated.Is ther any possibility to reset the zero and span of this positioner 4211 fisher.And what other possibility I can do to fixed this.This is my email add ( landicho_randy@yahoo.com )

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Tell me the field calibration procedure step by step with diagram of temperature transmitter, temperature indicator, flow indicator, level indicator, control valve, thermocouple, pressure indicator (digital & analogue).

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Is SmartPlant Instrumentation taking advantage of the quality assurance procedures within Intergraph?

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why we use -ve voltages in vibration prob?

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how to calibrate ph meter?

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pls tell me whethere flame proof HMI's are available or every HMI is manufactured by considering flame proof standard.

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what should be distance from tapping point to inallation place of instruments?

3 Answers   Tasnee Petrochemicals,

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Steve said that "An eddy-current probe works by passing an alternating current through a coil of wire and measuring the coil’s impedance" while we are using -24 Volt DC , So I am confused about DC and AC. Plz .

2 Answers   Jindal, Sadara Chemicals,

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how to measure temperature from resistance of rtd?and how to measure temp from voltage of thermocouple?is there any formulas?

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What is Trim?

1 Answers   Gujarat Borosil,

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what is the square root flow transmitter formulla ?

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