Manual

Operation
Introduction
The GA-52Cx Magnetic Locator detects the magnetic field of a ferromagnetic object. It responds to the difference in the magnet-
ic field between two sensors spaced about 20 inches apart. The response is a change in the frequency of the signal emitted by the piezo-
electric speaker.
Figure 1 illustrates an application of the locator in which it is used to detect an iron marker of the type used for property line iden-
tification. As shown, the magnetic field of the iron marker is stronger at sensor A than it is at sensor B. As a result, the frequency from
the piezo electric speaker is higher than the idling frequency, 40 Hz, which exists when the field strength is the same at both sensors.
Figure 1. Detecting Magnetic Field of an Iron Marker
Turn-On, Sensitivity and Volume Settings
Set the On-Off/Sensitivity Control to position 2 and adjust the Volume control until the idling tone reaches a desired level. Setting
the Sensitivity control to position 2 provides what is referred to as the “Normal Operating Range.” Positions 3 to 5 increase the sen-
sitivity; position 1 decreases the sensitivity.
The locator can be oriented in any direction without producing a significant change in the frequency of the tone from its idling fre-
quency.
When using headphones the Volume Control has no affect on the output level of the audio signal.
Figure 2. Sensitivity Set for Normal Range (position 2)
Schonstedt Instrument Company 1