G-858BP Backpack Mag Operators Manual
Highlight MAGNETOMETER, and press ENTER. You will now see the following display:
--- MAGNETOMETER TEST ---
Magnetometer Signal
0 25% 50% 75%
Battery
Lithium
RF1
Bright 1
Cold 1
Signal 1
RF 2
Bright 2
Cold 2
Signal 2
Magnetometer Test Display. (Note G-858BP Gradiometer Console Mode shows both sensors)
The exact display will differ depending upon how many sensors are installed, and how long the
unit has warmed up. The unit is warmed up and operating properly when the Bright1 is maintaining a
constant reading of 50%.
If no signal is indicated, it usually means that the sensor is oriented in the dead zone, or the field
gradient is too high. Try orienting the sensor differently, and move it away from large ferrous metal
objects. Typically, in an office or other indoor environment, gradients are too high, and the sensor signal
will often not appear. See the section earlier in this chapter for more information on sensor dead zones.
From this menu, you should also check the level of the Lithium battery. If less than 65% (75% is
normal) you should have the battery replaced. This should only be necessary every several years.
More information about this display is contained in Chapter 10.
Note: Occasionally, the unit may indicate a bad sensor during the warm-up
period. If so, press the ESC key to stop the warning sounds, and then simply
unplug the sensor and plug it back in. The sensor will then re-initialize, and
should come up to the proper operating point.
You should next select SEARCH MODE from the main menu. (Press ESC 3 times to go back to
the MAIN MENU). You can then observe the readings as they occur and play with different sensor
orientations. The next chapter explains how to use the Search Mode.
30
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