Calibration and Maintenance of Analytical Balances

This video tutorial explains how to calibrate analytical balances in a lab setting. It covers the responsibilities of staff and students in maintaining the balances between professional service visits. The video provides step-by-step instructions on how to calibrate the balances, including ensuring the balance is zeroed, using the mode and tare buttons, and recording data in a laboratory notebook. It also emphasizes the importance of handling weights with gloves and adjusting the balance using rotating feet to center the bubble. The tutorial concludes with final adjustments and recording of temperature data.

Why is it important for staff and students to maintain the analytical balances between professional service visits?

• To ensure the balance is always turned off

• To avoid using the balance too frequently

• To make sure the balance is properly used and maintained

• To ensure the balance is always clean

What should you do before pressing the mode button during calibration?

• Ensure the balance is zeroed and all doors are closed

• Place a weight on the balance

• Turn off the balance

• Open all the doors of the balance

What is the purpose of moving the black dial during calibration?

• To record the weight displayed

• To adjust the balance's temperature

• To reset the balance

• To turn off the balance

What should be recorded in the laboratory notebook during calibration?

• The balance number and temperature

• Only the operator name

• The date, balance number, recorded weight, and operator name

• Only the date

How do you ensure the balance is level during calibration?

• By using the two black rotating feet

• By using the two grey rotating feet

• By using the tare button

• By using the four grey rotating feet

What should you wear when handling the 100 gram weight?

• A mask

• A lab coat

• Gloves

• Safety goggles

What happens when you press and hold the tare button during calibration?

• The balance displays the temperature

• The balance turns off

• The balance resets

• CA L appears on the screen

What should you do after the adjustment is complete on the touch screen?

• Place a weight on the balance

• Open all the doors of the balance

• Record the date, balance number, and operator name

• Turn off the balance

Which feet are used to center the bubble in the circle located on the back of the balance?

• The two black rotating feet

• The two grey rotating feet

• The four grey rotating feet

• The tare button

What is the final step in the calibration process?

• Opening all the doors of the balance

• Turning off the balance

• Recording the temperature

• Centering the bubble using the four grey rotating feet