This document provides safety guidelines for operating an arc welder in the Zaikina Lab. Operators must be trained and authorized by the lab manager. Personal protective equipment including a welding helmet and latex gloves must always be worn. The document outlines the steps to prepare, operate, and shut down the arc welder safely. Operators should inspect equipment, set the desired amperage, fix materials securely, and monitor the process. Proper clean-up and handling of any issues or emergencies is also covered.
Safety precaution of some of equipment and production of product safety is presented briefly. It is very important tool in any lab for maintaining hygiene and safety when dealing with equipment.
Changing out dust bags in reverse pulse dust collectors. The dust bags in pulse jet dust collectors require replacement if damaged and leaking or if blinded by the product. This work procedure indicates the process and methods to use to change-out and replace dust bags and cages in a dust collector.
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Safety precaution of some of equipment and production of product safety is presented briefly. It is very important tool in any lab for maintaining hygiene and safety when dealing with equipment.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
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The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
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Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
2. Disclaimer
• Operators must be authorized and trained by the lab manager or
other trained Zaikina Lab personnel
• In addition to training, review this guide as well as the SOP
provided in the lab prior to using this equipment
3. Personal Protective Equipment (PPE)
Required
• Proper PPE must always be worn in the lab
• While using the arc welder a welding helmet must be worn and
latex gloves must be worn over the glovebox gloves.
4. 5
4
3
2
1
1.Getting Started: Preparing to
Weld
2.Ready to Weld
3.Shutting Down
4.Clean-Up
5.Emergencies
Click on numbers to advance to specific
topics
Arc Welding
5. Getting Started: Preparing to Weld
• Inspect glovebox before use
• Ensure H2O and O2 levels are at normal
operating range and the Ar tank has >300 psi
remaining.
• Inspect welder
• Ensure the workspace in the glovebox is free of
flammable objects
• Check that the electrode is clean and sharp
• Make sure the desired copper plates are intact
and clean
• Clamp copper plate is for tubes
• Copper well plate is for arc melting
• Ensure that welding helmet is functional
• If low battery light is on, replace AAA battery
• When helmet is on and working, the lens should
darken when looking at a source of light (look
at the window)
• If it doesn’t darken, press the reset button and
the lens should flash. Return to Main
Aishwarya
waving
6. Getting Started: Preparing to Weld
• Open water lines to the copper plate
• Use the step stool to safely reach the set located behind the
glovebox
• The second set is attached directly to the right outside the
glovebox
• Completely open Ar tank
• Record your initials, date, start time, end time, amperage
used, and materials welded
• Turn on circuit on the wall
• Turn on main power on the welder
• Make sure the dial is set to DC TIG
• Turn knob to set Amperage to desired level
• Nb tubes: 40-45 A
• Large Ta tubes: 45-50 A
• Small Ta tubes: 20-25 A
• When arc melting a sample, start at lower A and increase
gradually
Return to Main
7. Ready to Weld
• Fix tubes into copper clamp plate
• They should not wiggle
• Samples to be arc melted should be placed inside the depressions of the copper
well plate
• Any samples must be approved before arc melting
• Alert others that you will be welding to prevent accidental blinding
• Hold torch no more than ¼ inch away from the material to be welded but do
not touch the torch to the material
• Press down on the foot pedal to start the arc and slowly increase amperage to
the set value by pressing the pedal all the way down
• Adjustments to the amperage should be done using the dial, not by pressing less on the foot
pedal
Return to Main
8. Shutting Down
• Return torch to the stand
• Avoid touching the water lines or gloves with the welder or hot materials
• Allow time to cool before moving materials
• Always use the tweezers to move hot tubes to avoid melting holes in the
gloves
• Return the welder amperage to 10 A
• Turn off power on welder
• Turn off main circuit on wall
• Close the water lines
• Remove any and all possible waste from glovebox using the brush and
dustpan
Return to Main
9. Clean-Up
• Do not leave used gloves, weigh paper, etc. in the glovebox
• A dustpan and brush is supplied to aid in cleanup of materials
• Replace the tweezers where you found them when finished
Return to Main
10. Emergencies
• If a hole is made in the glove, quickly remove hand from glove and
place tape over the hole. Alert Zaikina lab member so the glove
can be repaired/replaced
• If hole is made in water line, SEEK HELP IMMEDIATELY. Alert Julia.
• If anything out of the ordinary occurs, seek assistance
Return to Main
11. Safety Reminder
• For non life-threatening treatment:
• Employees report to McFarland Clinic Occupational Medicine Office (515)
294-4496
• Students report to ISU Student Health Center (515) 294-5802
• For life-threatening treatment: CALL 911 remember to state that
you are at Iowa State University
• After hours: employees and students report to Mary Greely
Medical Emergency Dept. (515) 239-2011
Return to Main
