Amptec Research 620LK 설치, 운영 및 유지보수 매뉴얼 - 페이지 12

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620LK Operation and Maintenance Manual – Rev. J – Updated January 2020

probes for 3 to 5 seconds. The meter has 2 resistance ranges (a 199.99 mΩ range and

a 1.9999 Ω range) and needs a little settling time to automatically determine which

range is best before displaying the calculated bond value.

When the display backlight comes on, the meter has made a bond measurement. The

probes may be removed while the unit's backlight is on, as the unit's autolock feature

freezes the reading. The backlit frozen measurement will stay frozen until you either

press the "AUTO MEASURE RESET" button or press the test probes against a

conductor (meaning continuity is sensed). When ready to make another measurement,

simply place the probes back on the test items, and the meter will automatically make

another measurement. See section D-2.7 on page 9 for more information regarding the

autolock feature.

The user may use the unit's carrying case with padded straps to securely hold the bond

meter around their neck, while their hands hold the Kelvin probes and make bond

measurements. Repetitive measurements assure a good bond measurement; it may be

necessary to hold the probes down for 2 consecutive displayed measurement cycles to

avoid any timing issue of probe placement in the unit's measurement cycle, and

assuring the first initial settling in on the proper range. Bond measurement is almost

always a pass/fail test to determine if the bond is better than a given resistance level.

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