Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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PROPRIETARY and CONFIDENTIAL
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SERVICE
BULLETIN
Instrument:
General No.: GEN-005A
Subject: Use of Static Protection Kit Date: 17 Aug 98
Status:
Mandatory Pages: 1
This bulletin replaces Service Bulletin GEN-005
Static Protection Kit, P/N 20928
The Static Protection Kit is essential for protection of electronic components against electrostatic
discharge whenever you are disassembling or handling any PCBs or electronic components. The kit
contains the following items:
•
a bench mat with permanently attached alligator-clip ground lead;
•
a banana plug lead with snap connector;
•
an adjustable wrist cuff.
The static protection kit must be properly grounded, and you must be wearing the wrist cuff whenever
working on any instrument with the cover removed.
To use the static protection kit:
1)
Connect the bench mat alligator clip to a known good electrical ground point. Any unpainted screw,
chassis surface, or metal component on the instrument is generally an acceptable ground point,
PROVIDED THAT THE INSTRUMENT HAS ITS POWER CORD CONNECTED AND IS PLUGGED
INTO A GROUNDED POWER RECEPTACLE.
An acceptable ground point may be confirmed by
using an ohmmeter to ensure that a resistance of less than 1 ohm is obtained between the
instrument's power cord ground prong and the ground point in question.
In situations where work is to be performed on an instrument and it is undesirable to have the
instrument plugged into a power receptacle, an alternate grounding point is necessary. Usually, an
acceptable ground point can be found at the cover screw for the AC power outlet.
Note – It is useless to use the static mat without it being properly grounded.
2)
After properly grounding the bench mat, connect the banana plug lead into the bench mat
connector.
3)
Connect the wrist cuff to the snap clip on the banana plug lead.
4)
Adjust the wrist cuff to fit snugly around your wrist. The wrist cuff should always be worn when
working on an instrument with the cover removed.