PROBLEM | PROBABLE CAUSE | CORRECTIVE MEASURES |
3) Bad Repeatability | a) Inconsistent Measurement Technique | a) Ensure that there us enough pressure |
|
| applied between the Light Wand and the |
| b) Incorrect Zero Adjustment Procedure | subject’s arm |
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| |
| c) Not measuring at the proper location | b) When taking a measurement, ensure |
| that the Silver Stripe on the Light Shield is | |
| on the arm | pointing towards the subject’s shoulder |
|
| (the Silver Stripe on the Light Wand |
|
| should be aligned with the Silver Stripe on |
|
| the Light Shield). |
|
| c) Always use the Light Shield to block |
|
| external light. |
|
| d) Avoid taking measurements under |
|
| strong lights (e.g. direct sunlight) as errors |
|
| may occur |
|
| e) When Zero Adjusting, ensure that the |
|
| silver line on the Light Wand is aligned |
|
| with the silver line on the Optical |
|
| Standard. |
|
| f) When Zero Adjusting, make sure that |
|
| the Light Shield has been removed from |
|
| the Light Wand. This is to ensure that the |
|
| Light Wand is properly seated in the |
|
| Optical Standard. |
|
| g) Always use the Biceps Locator to find |
|
| the measurement site. Instructions can |
|
| be found on page 12. |
35