2. Zero Adjustment - A rotary switch for adjusting the discrimination level. 



3. Battery check. 



Figure 4 shows the White's PI- 1000. It comes with a 10-inch-diameter coil. Detection 

 is indicated to the diver by an audible clicking and by light-emitting diode (LED) display. It can 

 be powered by six "AA" alkaline or rechargeable batteries. Controls feature a rotary switch for 

 on/off operation, battery check, and tuning/zeroing. 



Magnetometer (Forster Ferex 4.021). A fluxgate magnetometer is made up of a coil 

 of wire wound around a highly permeable core. The core is driven in and out of saturation by 

 a low-frequency electrical signal. This saturation, which is affected by changes in the total 

 ambient magnetic field, is sensed by a separate winding and amplified to provide a signal to the 

 operator. 



Manufacturer: 



White's Or. 



Model: 



PIIOOO • 



Class: 



Pulse Induced 



Sizes: 



10 inches dia. coil 



Power Supply: 

 Batteries 



Description: 



Totally Submersible, 

 Diver Held 



Figure 4 

 White's PI-1000; 



