S 762-046
WARNING: USE A WRIST STRAP WITH A MINIMUM GROUNDING LEAD RESISTANCE OF
_______
250 KILOHMS AND A MAXIMUM OF 1.5 MEGOHMS.
(2) Do these steps to do a test of the wrist strap resistance:
(a) Use an ohmmeter to make sure the wrist strap assembly has a minimum resistance of 250 kilohms and a minimum of 1.5 megohms.
CAUTION: THE GROUNDING LEAD ON THE WRIST STRAP MUST TOUCH THE SKIN
_______ TO GIVE THE PROTECTION THAT IS NECESSARY. FAILURE TO USE THE WRIST STRAP CORRECTLY CAN CAUSE DAMGE TO THE ESDS METAL ENCASED UNIT.
(b)
Connect the strap on the wrist of the person that will remove the device.
(c)
Use an ohmmeter to make sure the resistance is less than 10 megohms.
S 422-047
(3) Connect the strap to an applicable electrostatic ground jack.
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S 022-026
(4) Remove the unit with the ESDS placard from the equipment rack, the airframe, or the panel as shown in the applicable Removal/Installation procedure.
NOTE: Make sure you do not touch the pins in the electrical
____ connector. Make sure a static sensitive placard is installed adjacent to the electrical connector(s).
This placard show that the unit can be damaged by an electrostatic discharge through the connector pins.
This static sensitive placard, or an equivalent, will be shown:
~.................................................. | CAUTION | | ELECTROSTATIC SENSITIVE | | DEVICE. CONDUCTIVE CONNECTOR | | DUST COVER REQUIRED. | 2..................................................1
S 032-027
(5) Install a conductive dust cover with a static sensitive placard on the connectors, and standard dust covers or optional conductive bag on the connectors that do not have the placard.
NOTE: The conductive dust caps and the connector covers are black
____
in color.
NOTE: The conductive dust caps and the connector covers from the
____ installed unit can be used on the removed unit.
S 862-028
(6)
Move the unit, as shown in the standard practices, with the conductive dust caps and connector covers installed.
(7)
Remove the strap.
S 482-048
TASK 20-41-01-402-029
5. ESDS Metal Encased Unit Installation Handling_____________________________________________
A. Equipment
(1)
Wrist Strap - 3M 2066 or 2067
(a) A wrist strap is kept on the plenum of the racks E3 and E4 in the main equipment center. (Fig. 202)
(2)
Ohmmeter
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(3) Conductive electrical dust caps and connector
covers (Conductive Bag - Optional).
NOTE: Conductive dust caps and connector
____ covers are black or grey in color.
(a)
ITT Cannon - as applicable (stamped "CONDUCTIVE")
~.......................................... |PART NUMBER |MARKING ON CAP |CONNECTOR | ............................................ |025-1155-001 |BKAD1-A&B-R |BKAD1-A-R | | | |BKAD1-B-R | ............................................ |025-1156-001 |BKAD1-C-R |BKAD1-C-R | ............................................ |025-1157-001 |BKAD2&3-A&B-R |BKAD2-A-R | | | |BKAD2-B-R | | | |BKAD3-A-R | | | |BKAD3-B-R | ............................................ |025-1158-001 |BKAD2&3-C-R |BKAD2-C-R | | | |BKAD3-C-R | 2.............…................…...........1 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：757 AMM 飛機維護手冊 STANDARD PRACTICES - AIRFRAME(153)
