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Instructions for Calibration of TSP-3 Almen Gage
Make a copy of the Certification of Calibration form (Metric or English) provided in this manual. Note: Do not
repair, adjust or replace any items until the “Attribute” and “As Found” readings are completed.
Record the Serial Number of the Almen gage and its step block on the form. Record the Serial Numbers, Certified
Values and Calibration Due Dates for the five (5) step blocks and 9-hole template.
Inspection
Indicator Free Movement
- Check the indicator stylus for free movement and full range of travel. If the indicator
stylus sticks, the gage must be repaired. Record “Pass” or “Fail” in the column of the form. Record any notes if
necessary.
Indicator Tip
- Without the use of magnification, look for signs of wear or damage. Replace the indicator tip if
there is wear or damage. For example, a flat spot of 1 mm (0.039 inch) requires the replacement of the indicator
tip. Record “Pass” or “Fail” in the column of the form. Use the Notes column to record repairs or replacements.
Ball Condition
- Inspect the magnetic strength of the four balls. Verify there is sufficient attraction to hold the test
strip securely in place. If not, replace entire gage head. Inspect the condition of four balls. If there are flat spots
greater than 1.0 mm (0.039 inch) in diameter on top of any ball, the gage head must be repaired or replaced.
Record “Pass” or “Fail” in the column of the form. Use the Notes column to record repairs or replacements.
Post Condition
- Without the use of magnification, inspect the posts for signs of wear. If grooves on the posts
could prevent the test strip from being properly seated, the posts should be rotated or replaced. To rotate the
posts: Press the posts out from the bottom of the gage head, rotate them approximately 180 degrees, and press
them back into the gage head. Record “Pass” or “Fail” in the column of the form. Use the Notes column to record
any repairs or replacements.
Ball and Post Position Measurement Check
The 9-hole template verifies the position of the balls, posts, and indicator tip on the Almen gage head.
This is a pass/fail test. Place the template over the balls and posts. The template should lie flat on the base
surface—a ball or post should not interfere with this placement. The indicator tip should pass freely through the
center hole with no interference. If the template does not rest securely on the Almen gage head, the gage head
must be rejected. There are no adjustments or other remedies for this out-of-tolerance condition. The entire gage
head must be replaced. Record “Pass” or “Fail” in the column of the form. Record any notes if necessary.
9-hole template
