Answer / krishna reddy

Let me know first which make you have.

Instrument have min and max ranges on its name plate.
So wiht multimeter you can check 4-20ma of flow meter.It
must be 4 ma if flow is zero and 20ma if flow is max range.
supose your flow mete got 100L/hr.
for 4ma flow should be 0 L/hr
8ma - 25L/hr
12ma - 50L/hr
16ma - 75L/hr
20ma - 100L/hr

Like this you can check.

Answer / amit

U can do the cold test by checking the sensor.It has piezo
sensors in symetrical manner. U can check both piezo
sensor by checking the capacitance. If capacitance is
accordance with size means sensor is OK. same way u can
check temp and pressure sensor(by checking the resistance)
if it has.This way u can check the healthiness of the
sensor. If u want to check the response of sensor, u can
give little vibration to the sensor by hammering on it and
check the response on transmitter. U cannot directly check
the calibration for flow on field itself.

Answer / tuhin

@soumil: no hp and lp side exist in vortex flowmeter. Vortex
principle is different.

Answer / saumil

In this meter hp or lp any one side we isolate line valve and check zero if it is ok then meter is ok

Why in turbine used two critical speed band ?

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in a power plant which system are compensated?

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A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

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What is the purpose of the analyzer in petrochemical plant?

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i m passed my engineering in 2010 in instrumentation and control engineering. my question is can i apply for software jobs or vacancies.??????????? plz give me answer soonnn......

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I have 0.75mm sq multicore cable (IS type) , can use instead of same type but 1.5 sq mm cable ? Note : The distance is around about 150 meter.

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