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Maintenance Method for the HAKKO 498
Tips for using the unit correctly...
If a failure phenomenon occurs...
Maintenance Method for the HAKKO 498
POINT 1 Reason why the unit is not judged as GOOD
POINT 2 Simple daily inspection
POINT 3 Acceptable judgment range (800kΩ≤R≤9MΩ)
POINT 4 Accuracy check method
POINT 5 Influence on pacemaker-implanted persons and pregnant women

POINT 1. Reason why the unit is not judged as GOOD
First, check whether the HAKKO 498 operates normally by the POINT 2 (Simple daily check).
The reasons why it may be judged as HIGH even though the HAKKO 498 is operating normally are as follows:

•The wrist strap is loose.
•The grounding wire for the wrist strap is broken. (For the check method, click here.)
•Measurement is performed with a dry hand.

The reasons why it may be judged as LOW even though the HAKKO 498 is operating normally are as follows:

•The resistor in the wrist strap is short-circuited. (*1).
•Measurement is performed with a wet hand.

*1 The HAKKO grounding wire for wrist strap is equipped with a 1MΩ resistor.

Reason why not judged as GOOD Explanatory image