·   Clean  and  store  eye-protection  equipment properly after you are through using it. HEARING PROTECTION Although you may not think of hearing protection as  being  associated  with  electrical  and  electronic repair,  it  is.  Consider  the  area  in  which  you  will  be working. Hearing loss is a problem in the Navy. Every day,  you  may  be  working  with  and  around  noisy equipment  and  machinery  that  could  damage  your hearing.  In  most  cases,  the  damage  will  not  happen overnight; it will happen slowly. Your  hearing  may  degrade  until  you  will  not  be able to hear the softer sounds as well as you could have if you had worn hearing protection. This is commonly called a hearing threshold shift. It simply means that the more you are exposed to damaging levels of noise, the louder normal sounds must be for you to hear them. You  must  start  now  to  protect  yourself  from hearing  loss.  OPNAVINST  5100.23  states  that  all personnel must wear hearing protective devices when they  enter  or  work  in  an  area  where  the  operations generate noise levels of greater than 84 decibels. If you are in doubt about whether a noise level is high enough 3-13 Step Action(s) 1 Secure the input power to the equipment. Use appropriate tag-out procedures, if necessary. 2 Open the equipment to gain access to the capacitors that need to be discharged. Do NOT touch any exposed terminals, as large filter capacitors can store a lot of energy. 3 Connect the flexible ground strap of the safety shorting probe to the metal chassis of the equipment, ensuring a good metal-to-metal connection. 4 Hold the safety shorting probe by its plastic handle and touch the metal probe tip to the appropriate terminals to be grounded. Do NOT touch the metal probe tip or the flexible ground strap while the probe is in contact with the capacitor’s terminals. Repeat this step two or three times to ensure that the capacitor is completely discharged. Table 3-8.—Safety Shorting Probe Procedure CAUTION DO NOT OPERATE THIS EQUIPMENT UNTIL SPECIAL INSTRUCTIONS BELOW ARE THOROUGHLY UNDERSTOOD. NAVSHIPS 9890/5 (REV. 2070) (BACK) SERIAL NO. FCf03006 Figure 3-6.—CAUTION Tag (NAVSHIPS 9890/5). DANGER DO NOT OPERATE SYSTEM COMONENT IDENTIFICATION DATE/TIME POSITION OR CONDITION OF ITEM TAGGED SIGNATURE OF PERSON ATTACHING TAG SIGNATURES OF PERSONS CHECKING TAG SIGNATURE OF AUTHORIZING OFFICER SIGNATURE OF REPAIR ACTIVITY REPRESENTATIVE DANGER DO NOT OPERATE OPERATION OF THIS EQUIPMENT WILL ENDANGER PERSONNEL OR HARM THE EQUIPMENT. THIS EQUIPMENT SHALL NOT BE OPERATED UNTIL THIS TAG HAS BEEN REMOVED BY AN AUTHOR- IZED PERSON. NAVSHIPS 9890/6 IRev 1 (FRONT) {FORMERLY NAVSHIPS 50091 S/N 0105-641-6000 FCf03007 Figure 3-7.—DANGER Tag (NAVSHIPS 9890/8).