
12
In addition to the logic board, the Control Box contains switches and indicators on the front panel.
POWER SWITCH - When turned on, the 24 volts from the boat/car battery feeds the Power Supply section
on the Analog board. The green indicator just to the left of the switch will illuminate.
POL TIME SWITCH - A three position switch that allows the operator to determine the length of Polarization
Time of the sensor coils. Pol Times of 2, 3, or 4 sec's can be selected. The POL switch determines how often
the unit cycles. Because the boat is moving, we want to take readings as often as possible, so we want to
Pol as quickly as possible. This switch is normally used in the 2 second position.
SENSITIVITY SWITCH - A four position switch to allow adjustment of the sensitivity of the unit. Since
magnetometers can generate 2-3 gammas of noise while being towed, it is not always desirable to operate
at its maximum sensitivity. Also, once a large target is detected, you may want to turn down the sensitivity
to enable you to more easily pinpoint the target.
G1 - A one digit change indicates a one gamma change. Most sensitive position, used to locate small
targets. Best position if readout is steady (not jumping around).
G5 - The gamma reading is divided by 5 before it is displayed. A one digit change in the readout
indicates a five gamma change. More stable than G1, used for most magging operations if in
noisy area.
G10 - The gamma reading is divided by 10 before it is displayed. A one digit change in the readout
indicates a ten gamma change. Used in pinpointing targets or when you are looking for a large
target in a small area.
G20 - The gamma reading is divided by 20 before it is displayed. A one digit change in the readout
indicates a twenty gamma change. Used in pinpointing large targets.
If you were in Miami, Florida area, you would get an approximate reading (see map) of:
G1 = 49,138
G5 = 9,827
G10 = 4,914
G20 = 2,457
If you were in the Miami area approaching a large ship:
SEN Setting
2000' away
1000' away
900'away
800' away
100' away
G1
49,138
48,984 48,979
48,963 46,533
G5
9,827
9,797
9,796
9,793
9,307
G10
4,914
4,898
4,898
4,896
4,653
G20
2,457
2,449
2,449
2,448
2,327
CABLE
PROTON 3
PRINTER
PROTON 4
Printer
Readout
POL Time
Sensitivity
Alarm
Power ONLED
Power Switch