MAINTENANCE 



Garrett XL500 



GOOD. Maintenance is rated as good since this is limited to recharging the batteries 

 (required after 9 hours of operation), periodic lubrication of 0-rings, inspecting for signs of wear 

 or damage, and rinsing the unit with fresh water after use. The batteries are charged by plugging 

 a 12-volt transformer (supplied with the unit) into the earphone connector. All 0-rings on the 

 connectors and the electronic housing cover are accessible and easily replaced. 



White's PI-1000 



GOOD. Maintenance on this item is rated as good since it is limited to replacing the 

 batteries every 12 hours, lubricating 0-rings on the cover to die electronics housing, inspecting 

 the unit for wear or damage, and rinsing the unit with fresh water after use. Although the 

 batteries are nonrechargeable (six "AA" batteries) they should be readily available in most 

 locations. 



Fisher Pulse 8 



FAIR. Maintenance on this unit is minimal (limited to charging the batteries, inspecting 

 the unit for wear or damage, and rinsing the unit with fresh water after use) but is rated as only 

 fair since the batteries require recharging after 4 hours of operation. 



Forster Ferex 



GOOD. Maintenance on this unit is limited to replacing the batteries, inspecting the unit 

 for wear or damage, and rinsing the probe with fresh water after use. 



REPAIR 



Repair of all four systems is rated as fair. Repair of these units in the field is limited to 

 replacement of 0-rings. All other repairs such as replacement of faulty electrical components 

 or repair of mechanical items (i.e., broken handles, stripped threads, or damaged electrical 

 housing) must be conducted at the Depot level. 



MATERIALS OF CONSTRUCTION 



Garrett XL500 



SENSING WAND: aluminum tube and plastic 



COIL COATING: plastic 



ELECTRONIC HOUSING: plastic 

 OUTPUT TRANSDUCER: plastic earphones 



B-4 



