Answer / tontoy

1 prepare the instruments needed in calibrating temp.
transmetter.
2 unsrew the resistance input of the transmetter, and
connect it to a resistance box.
3. unsrew the output side of the transmetter, connect the
ammeter serries with the supply of 24 volts dc.
4. supply it with the resistance of 0% or 100 Ohm until
100%. and record it to the data in the as found.
5. the next is the zeroing. supply the input with 100ohm
resistance. adjust the adjustment of the zero side by
twisting slowly to the left to have an output of 4mA.
6. span- supply the transmitter with 100% depends on the
value of high temperature of the RTD value. and adjust it
to 20mA.
7 repeat it up to 4-5 times.
then supply is again with 100Ohn, mast have an output of
4mA until 100%.
record it to the data as asleft.
for 0% must have an output of 4mA, 25% 8mA, 50% 12mA, 75%
16Ma, and 20mA for 100%.

Answer / sumit yadav

1)There is equipment available where we can put RTD and
give temperature.Now set temp transmitter parameters to
produce mA equivalent to temp given.

Answer / gcs

1. First select the calibrating equipment
2. for ex: For RTD, select RTD circuit with zero and span adjustment potentiometers.
3. make the input quantity (temperature) to zero.
4. adjust the zero adjustment pot ntill the output of the RTD becomes zero.
5. make the input quantity to high (Ex.100 deg) and adjust the span pot till the output becomes 100.
6. Repeat steps 3 through 5 till there are no changes in zero and span pot.
7. now the instrument is calibrated.

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