Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / gireesh gokuldas
1)Obtain Permit to work. Confirm proper isolation of process.
2)Depressurize the system by draining or venting.
3)Disconnect the process tubing and replace with correct fittings for calibration with pressure source.
4)Wear goggles to avoid splashing of liquid into eyes when depressurizing.
5)Use a Digital Multimeter (DMM) set to the continuity range to check and verify that the switch contacts are as indicated: NO (Normally open) and NC (Normally close).
6)Connect the DMM between the normally open contacts (NO) and the common terminal (C) of the switch. The meter should read "open circuit"
7)Adjust the hand pressure regulator to increase the pressure to the set point of the pressure switch until the contacts change over.
8)The meter should now read "short circuit". Note the pressure reading and write it down. This pressure is the switch set point for a "rising" pressure.
9)Increase the pressure to the switch to its maximum rating.
10)Slowly reduce the pressure to the switch until the switch changes over from closed to normally open again.
11)Note and write down this pressure reading. This pressure is the switch setting for a "falling" pressure.
12)From the readings you have taken work out the pressure difference between the rising and falling pressure settings. This is called the "dead-band" of the switch.
13)The dead-band calculated should be equal to or less than the manufacturers’ dead-band
14)Disconnect the calibrator and restore the process tubing and put the switch in service.
15)Complete the calibration form and apply the appropriate calibration label.
16)Clean the area and clear Permit to work.
| Is This Answer Correct ? | 16 Yes | 3 No |
Post New Answer View All Answers
How digital input and digital output 's are working in dcs
what is function of sensor, and how is it work , explain with difination
few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters
can we create an interrupt in plc through scada?
what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail
which processor is used in dcs.
2. What is ultrasonic flowmeter?
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?
How to interfacing microcontroller with a DC motor
We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.
why we take %i0.0 as input for twido plc
The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?
How it the difference between force balance system and dispalacement balance system?
What is the use of GMV in turbine?
what is effect of specific gravity in differential level transmitter , explain formula related with this .
