Thermometer Calibration Procedure

Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and covered mass length and volume calibrations for field.

Thermometer calibration procedure.

Different digital thermometers have different methods for the purpose of calibration. Thermometer calibration for use in cold process and products ice water method an easy way to calibrate your thermometer is to put it in ice water and adjusting it to read. Finally thermometers require regular calibration daily or weekly when they are used frequently. Add a little clean water until the glass is full and stir.

Use water for 0 0 c and silicon oil for the temperature above 50 c. Thermometers that cannot be easily calibrated through direct immersion in either. Here s a useful video on the calibration process. Nbs handbook 145 1986 handbook for the quality assurance of metrological measurements by john k.

A similar calibration procedure can be used for thermometers intended to be used in cold processes and products. 10 1 annual thermometer calibration reports for nist traceable thermometers sections 7 1 7 2 and 7 3 are stored in the thermometers calibration certificates. Record the results using actual values on the thermometer calibration log along with the date and initials of the person performing the calibration procedure. Materials necessary to calibrate a thermometer for cold.

Before the calibration the infrared thermometer should be allowed enough time to reach the temperature of the laboratory typically 15 minutes. Step 2 test your thermometer. This is an especially important consideration when bringing a thermometer in from the outside. Use these two methods to get your thermometer back on the right track.

Learn how to test a thermometer s accuracy and how to calibrate a thermometer using two methods. 5 1 3 put the beaker in an oil bath fitted with a stirrer. 5 1 calibration procedure 5 1 1 the thermometer for calibration shall be mercury in glass type. Digital thermometer calibration procedure.

The first is the freezing point method. Traceable thermometers are certified annually by a contractor outside of the opp microbiology laboratory. Fill a glass with crushed ice. Thermometers that have been adjusted for 3 consecutive months will be replaced.

First there are those that have a nut or a screw for calibration. 5 1 2 take a 1000 ml beaker filled with about 850 ml of silicon oil. The stirrer shall be dipped in the beaker. For this particular type you have to.

Not applicable 10 0 procedure and analysis. The thermometers will vary but the basic concept is the same. An ice water bath and a boiling water bath.