PURPOSE
To established a procedure for the calibration of temperature gauge & temperature controller.
SCOPE
This procedure covers all temperature gauges & temperature controllers being calibrated by Siza personal.
EQUIPMENT USED
Calibrated Digital Temperature Indicator.
Oil Bath with Electric Heater.
PROCEDURE
The Temperature Gauge & Temperature Controllers is handled in the following way.
Not down all relevant information of instrument in the data sheet.
Now clean the gauge for any stain or rust.
Now increase the temperature of the oil bath system regarding to the gauge to be calibrated and fix the gauge in the oil bath and sensor of the digital temperature indicator, leave it for some time to maintain its temperature.
Now check the Temperature gauge reading & Digital Temperature Indicator Reading.
The gauge is to be calibrated on three times approximately or at the temperature ranged used normally in the system.
Note down the temperature reading of first set point in the column marked “READ VALUE”. In the data sheet.
Note down the reading on the standard instrument in the column marked “TRUE VALUE” in the data sheet.
Repeat steps for next set point and note the readings in the respective Calculate the deviation by subtracting the READ value from the TRUE value, and enter the deviation in the column marked “DEVIATION” in the data sheet.
Now analyze the deviation. If the deviation is out of the specified deviation of the temperature gauge is to be adjusted until the deviation comes within required deviation. If after adjustment deviation does not come within specified deviation stop calibration and replace the instrument with new one and calibrate it again and fill the final inspection sheet accordingly.
If the deviation within specified deviation affix the calibration sticker on the temperature gauge or temperature controller and submit the data sheet to Maintenance Manager.
Calibration engineer prepare the calibration sheet and submit to Maintenance Manager.
The record sheet is sign by concern calibration Engineer.lumns in the data sheet.
