CALIBRATION OF P-I CONVERTER

AIM:

To calibrate the given P-I converter.

REQUIREMENTS:

1. P-I converter.2. 24v DC power supply.

PRE-REQUISTIES:

1. Ensure power supply connection. Note output of P-I converter that is measured in series with power supply.

2. Ensure air supply connection.

PROCEDURE:

1. After making proper electrical and air connection switch or power supply. Note that LED of P-I converter glows only when input air supply reaches 0.2kg/cm2.

2. Now increase input air to 0.2kg/cm2 and note down the output reading of PI converter. It should be 4mA. If not adjust zero point to make it 4mA.

3. Now pressure is increased to 0.4, 0.6 ,0.8 and 1. Note down output reading. For 1kg/cm2 output should be 5mA.

4. Do not adjust zero or span pot middle of any reading.

BLOCK DIAGRAM OF P-I CONVERTER:

P-I CONVERTER (upscale & downscale)

pressure STDAmmeter(mA)

Unit under calibration

% error % accuracy PSI mm of Hg

STUDY OF INCLINED MANOMETER

AIM:

To make a comparison between H2O in inclined tube and mm of H2O and to familiarize with comparison of pressure measurement reading.

PRE-REQUISTIES:

1. Ensure proper pneumatic air connections.2. Before starting experiment convert equivalent mm of H2O reading for

calculation using conversion table.

PROCEDURE:

1. After ensuring proper pneumatic connections apply pressure to water column.

2. Repeat same for various reading.

BLOCK DIAGRAM OF INCLINED MANOMETER:

INCLINED MANOMETER:

Inclined manometer Vertical observed(cm of H2O)

%error %accuracyMm of H2O Cm of H2O

VACCUM MEASUREMENT

AIM:

The basic idea of experiment is how vacuum is being created and measured

1. Vacuum pump to create vacuum.2. Vacuum gauge to measure vacuum.

PRE-REQUISTIES:

1. 230V AC supply for vacuum supply pump.2. Proper tubing connection.

PROCEDURE:

1. Switch on power supply to vacuum pump and wait for 1min so that pump can develop full vacuum.

2. After 1min see reading in vacuum gauge.

BLOCK DIAGRAM OF VACUUM MEASUREMENT:

Vacuum gauge Manometer reading(cm of hg)

Upscale Downscale

RESULT:

Thus pressure switch, PI converter, study of inclined manometer and vacuum measurement is performed.