| Job Title |
Glass Calibrator |
| Job Description |
Measures, Marks, And Etches Units On Side Of Glass Tube
(pipettes) Or Similar Measuring Devices, Using Calibrating
Device And Solution Of Hydrofluoric Acid: Fills Tube With
Specified Quantity Of Mercury And Marks Meniscus Of Mercury With
Special Pen. Covers Tube With Wax. Positions Tube In Calibrating
Device, Aligns Needle Guide With Calibrated Ruler, And Turns
Locknut To Hold Guide In Place So That Exact Measurement Can Be
Marked, Starting From Meniscus. Turns Handwheel That Moves
Needle In Back-and-forth Motion To Remove Wax And Expose Glass
To Be Etched With Acid. Realigns Needle Guide To Next Unit To Be
Marked And Continues Sequence Until Tube Is Calibrated. Removes
Tube From Calibrating Device And Dips It Into Solution Of
Hydrofluoric Acid So That Acid Will Permanently Etch Area Of
Glass Not Covered With Wax. Rinses Tube In Cold Water To Remove
Excess Acid And In Hot Water To Remove Wax.
|
|
