how to calibrate transmitter
Answers were Sorted based on User's Feedback
Answer / binosh
pressure transmitter:
in bench calibration connect a power supply 24v.give a
250ohms as loop resistance.connect a multimeter in
milliamph mode and connect it in series.and put a
communicator across the loop.the transmitters HP&LP sides
should be in open to atmosphere.this condition the
ammeter shows 4ma and the communicator shows LRV .connect a
pressure calibrator to the HP side and LP keep it open to
atm.apply pressure as the range and go on as 25%,50%,75%and
URV.then the ammeter shows 4,8,12,16,20ma
respectivly.incase you are not getting zero,make zero trim.
Is This Answer Correct ? | 7 Yes | 1 No |
Answer / s. kanniyappan
TEMPERATURE TRANSMITTER:
GIVE 24VDC TO THE TRANSMITTER
CONNECT MULTIMETER IN SERIES WITH -VE TO THE TXT
GIVE RESISTANCE INPUT TO THE TRANSMITTER
GIVE LRV VALUE BY ADJUSTING THE DRB
ADJUST ZERO FOR LRV
GIVE URV VALUE BY ADJUSTING THE DRB
ADJUST SPAN FOR URV
GIVE 25%, 50%, 75%, 100% OF URV (RESISTANCE) AND CHECK THE
CORRESPONDING MILLIAMPS OUTPUT
PRESSURE TRANSMITTER:
GIVE 24VDC TO THE TRANSMITTER
CONNECT 250 OHMS IN SERIES WITH -VE TO THE TXT
CONNECT THE HART TO THE TERMINALS OF RESISTANCE
CONNECT THE TRANSMITTER TO THE SOURCE VIA REGULATOR AND MAKE
A T OFF CONNECT TO A MASTER GAUGE
VARY THE PRESSURE BY ADJUSTING THE REGULATOR
MAKE ZERO TRIM FOR ZERO PRESSURE THROUGH HART
ADJUST THE REGULATOR AND CHECK FOR THE LRV VALUE IF NOT
MATCHING ADJUST THE ZERO
DO THE SAME FOR THE URV
GIVE 25%, 50%, 75%, 100% OF URV (PRESSURE) AND CHECK THE
CORRESPONDING MILLIAMPS OUTPUT
DP TYPE TRANSMITTER
LP LINE SHOULD BE LEFT OPEN TO ATMOSPHERE
CONNECT THE HP LINE TO THE SOURCE AND DO THE SAME AS ABOVE
Is This Answer Correct ? | 4 Yes | 2 No |
Answer / rajkumar
Any Txr has input, output, supply. give the simulated input
ie.. mA source or mV or pneumatic and check the o/p. if o/p
doesn't match adjust zero or span . Have details of range of
measurements in hand. In need use them also to get desired
output
Is This Answer Correct ? | 6 Yes | 8 No |
Why thermo wells are used? What materials are used in thermo wells?
What is procedure on mmwc in to tph
What is PLC(programmable logic control)?
What is the Difference between E/P Positioner and I/P positioner in a control valve? In which applications the respective positioners are used in?
The DCS has the following signal type:
I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?
WHAT DO WE MEANT BY INSTRUMENT MAINTENANCE IN SOFTWARE SIDE.
Control valve Flow characteristic. How the equal percentege curve form?
Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer
sir ,iam in dem urgent need of HPCL Paper of Instrumentation Branch plz send me at your earliest convenience at ujjwal_sharma1983@yahoo.com
What is minimum distance between three thermocouples (2oo3) mounted on same pipe line (20")? Technically accepted by stright line mounted or circler mounted?
in which principle pressure tx,level tx ,flow tx,temp tx ,control valve works?