Answer / jaffer

differential pressure transmitters:

1.both side applied a pneumatic pressure in the h.p&l.p side
check the response on the dp cell.
2.equal pressure on the both side and then transmitters shown
a zero value.
3.upper range value(URL)on the h.p side 10,000mmwc or 1kg/cm2. this value depend on process reqirement.
4.lower range value(LRL)on the l.p side 0 mmwc or 0 kg/cm2.
5.And then change value&change the tag no.
6.check the states of the transmitter. by the help of field calibration devices.

pressure transmitters:
1.the pressure transmitter is only one physical quantity sensing input&applied a input and then same 2,3,4,5,6steps.

yokogawa Temperature transmitter showing Error 15 which is Reverse Cal Fail (confirmation calculation result is bad) in manual they mentioned reasion That the output goes to the value set by hardware failure mode jumper. How can solve this problem ? anybody can say solution

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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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what is the thermocuple compensation circuit

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working principle of lvdt?

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Explain operation of Haskel pump.

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