Maintenance / Troubleshooting; Locating And Resolving Noise Sources - Garrett PD 6500i User Manual

6.

MAINTeNANCe / TrOUBLesHOOTING

There are several factors that may cause difficulties with the PD
installation, environmental noise, and program selection, as well as failures of the circuitry.
Often a problem can be corrected quickly and easily by using the following information
without the need for replacement parts or assistance from the factory or your dealer.
The following sections contain specific information and setup and should be read as part
of the troubleshooting procedure:
Procedure:
Site Selection & Requirements
Unit Assembly
Self Test
Program and Sensitivity Settings
Operation
Note: If you are having difficulties during setup, it may be desirable to return the unit to the
factory default settings. (See Section 3.6.)
If the above-listed sections do not take care of a specific problem, sections 6.1–6.3 cover
other issues which can commonly affect performance.
6.1

LOCATING AND resOLvING NOIse sOUrCes

The PD
effects of most external noise sources. However, the high sensitivity required to detect
smaller objects may make the equipment susceptible to interference from a variety of
external sources. The presence of these noise sources may be recognized
through unusual bar graph activity typically spiking into the yellow or red when no
one is being screened. The source of the noise may be mechanical or electrical. Two
techniques are often helpful in locating external noise sources.
6.1.1 MeTHOD TO LOCATe CONTINUOUsLY OCCUrrING NOIse INTerFereNCe
1. Enable the keypad by switching the TOUCHPAD KEY LOCK to the enable position.
(See section 1.3.1.5.)
2. Enter the diagnostic mode by pressing the ACCESS touchpad and then entering the
code 8721.
3. Press the ACCESS key incrementally to view the alarm levels for each zone. The
numbers on the left and right indicate the ambient noise levels present on the left and right
panels for the zone currently being observed. The number in the center indicates the zone
currently being observed.
4. The alarm level indicates the peak level of the interference. Press the + key to reset
the indicator to allow a new reading. After taking several readings for a given zone, press
ACCESS to proceed to the next zone.
5. Observe the alarm levels of each panel for each zone. Lower numbers indicate
greater ambient noise. Higher numbers (185-255) indicate low or no external interference.
Zones with alarm level numbers approaching or below the selected sensitivity setting
© 2008 Garrett Metal Detectors
PD 6500i User MANUAL
uses the latest digital signal processing technologies to eliminate the
6500i
Manual Section:
Section 2.1
Section 2.2
Section 3.3
Section 4, 4.1, 4.2
Section 5, 5.1, 5.2
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. These can include
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11–16
16–19
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