Garrett MT 5500 User Manual page 20

objects while they are passing through the detector, it can minimize effects of noise and other
influences.
2. By inhibiting the alarm when no one is in its archway, the IR Analysis greatly minimizes nuisance
alarms. In instances where there is movement of large metal objects near the exterior of the unit,
such as when luggage or supply carts pass by, or when lack of space requires the unit to be
placed very near a conveyor belt of parcel X-ray equipment, the sensor will effectively inhibit
alarms.
3. The IR Analysis provides a warning any time a person passes through the archway when the unit
is in the Set-Up or Self-Test Mode.
4. The IR Analysis enables the detector to count the number of individuals passing through it.
6.4 ALARM LEVEL READING
Computerized circuitry of the Garrett MT 5500 permits the unit to report the minimum sensitivity level
required to cause an alarm for the particular metallic target that is being passed through the arch-
way. This information can then be used to regulate the unit.
Press the ACCESS touchpad until PLEASE WAIT appears on the LCD Display, followed by ALARM
LEVEL and a number. The target in question should then be passed through the unit. Note the Alarm
Reading number that then appears on the LCD. This is the Sensitivity level that will be necessary for
the unit to sound an alarm on this target. Press the + touchpad to reset the indicator after each meas-
urement. It is recommended that several measurements of each object in question be made at var-
ious archway positions to obtain the optimum sensitivity level setting.
Press ACCESS for next adjustment or OPERATE to return to normal operation.
6.4.1 TYPES OF AUDIO ALARMS
Understanding the different audio alarms that the MT 5500 produces will enable both supervisors
and operators to understand the detector better and help assure totally accurate screening. Each of
three basic types of audio alarms is designed to call the operator's attention to current circum-
stances.
6.4.1.1 SET UP ALARM
Produces two short beeps as a person is walking through the unit. This alarm indicates that the
metal detector is in a set-up mode and is not ready for operation. Wait for the green READY light
(press OPERATE, if necessary). Person(s) who triggered the Set-up alarm must pass through the
unit again.
6.4.1.2 STANDARD ALARM
There are three (3) different standard alarms, with tonal differences to indicate whether the target
is on the left side, right side or center / balanced within the archway. One of these alarms will
sound when the red ALARM light appears and a target amount of metal is detected according to
Program and Sensitivity levels.
6.4.1.3 WARBLE ALARM
Occurs when a large metal mass, such as a wheelchair, furniture or large metal container is
moved through or near the MT 5500. The large amount of metal has saturated the detector's
receiver circuits and the warble alarm is an indicator that the operator should correct the situation
before allowing anyone to pass through the metal detector.
© 2006 GARRETT METAL DETECTORS
MT 5500
User Manual
20 PN 1530200.F.0506