Maintenance Method for the HAKKO 498 |
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POINT 3. Acceptable judgment range (800kΩ≤R≤9MΩ) |
The judgment range (800kΩ≤R≤9MΩ) is based on the details specified by ANSI/ESD S1.1-2006 of the ESD Association wrist strap standard.
[800kΩ]
The standard specifies that the safe current to human body is less than 0.5mA and the resistance required when touching AC240V as the maximum commercial power source is 800kΩ.
[9MΩ]
The standard specifies that 10MΩ or less is suitable. 9MΩ is set as the upper criteria limit.
[800kΩ≤R≤9MΩ borderline tolerances]
The lower limit range (800kΩ) has +10%, -0% tolerance and the upper limit range (9MΩ) has +0%, -10% tolerance.
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[HAKKO 498 with the former specifications]
The acceptable range for products manufactured before 1994 is 500kΩ≤R≤10MΩ. This judgment range has been used by our company because the whole industry employed these specifications. If the current specifications are required, purchase a new one. If the inner structure is different, it is impossible to change a product with the former specifications to the current ones. |
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