TASK- 2.7
TASK- TAKE
READINGS OF DRY AND WET BULB THERMOMETER-PSYCHROMETER
AIMS-
·
TO
UNDERSTAND THE USE OF PSYCHROMETER.
·
TO KNOW THE
PURPOSE OF ITS USE ON SHIPS
·
TO KNOW THE
BASICS CONSTRUCTIONS OF PSYCHROMETER.
·
TO KNOW THE
MAINTENANCE OF INSTRUMENT.
·
USE AND TAKE
READINGS OF WET AND DRY BULB THERMOMETERS.
·
REPORT THE
READINGS TO OOW ON SHIP.
REQUIREMENTS FOR TASK-
1. TEXT BOOK PART 2 GSK
2. INSTRUCTORS NOTES.
3. WHIRLING PSYCHROMETER.
4. RUNNING
DIARY.
PRECAUTIONS
TO BE OBSERVE-
1. THE CLOTH
SOAK MUSLIN ATTACHED TO THE BULB THERMOMETER SHOULD BE CLEAR AND FREE OF DIRT.
2. ONLY ONE
DROP OF WATER SHOULD BE DROPPED ON CLOTH
3. CLOTH
SOAK NEVER TO BE TOUCHED WITH FINGERS
4. THE
INSTRUMENT TO REVOLVE IN OPEN AIR OR IN THE WINDWARD SIDE.
5. WHILE
REVOLVING IT SHOULD NOT HIT ANY OBSTRUCTION.
6. IT SHOULD BE REVOLVED FOR AT LEAST 2
MINUTES
DESCRIPTION
READ THE
TEXT BOOK AND NOTES ON PSYCHROMETER.AND UNDERSTOOD THE CONCEPT.
PSYCHROMETER
CONSIST OF LIGHT WOODEN FRAME.IT IS PIVOTED TO REVOLVE AROUND THE HANDLE.THE
FRAME HAS TWO IDENTICAL THERMOMETERS,ONE OS DRY AND ONE IS WET.THE WET BULB
THERMOMETER HAS A SINGLE LAYER OF THIN CLOTH SOAK TIED TO ITS BULB.
THE FRAME
HELD IN OPEN AIR, ON THE WINDWARD SIDE AND WAS WHIRLED FOR TWO MINUTES.THE
TEMPERATURE ON BOTH THE THERMOMETERS IS READ OFF AND REPORTED TO THE OOW.
THE DRY BULB
THERMOMETERS READ 32* DEGREE CELCIUS AND WET BULB READ 30.5* DEGREE CELCIUS.
THE PURPOSE
OF ITS USE IS TO FIND THE RELATIVE HUMIDITY OF AIR IN THE ATMOSPHERE.
THE CLOTHE SOAK REQUIRED RENEWAL EVERY WEEK.
