CARONTE 9400

CONVEYOR BELT GAMMA MONITOR FOR SMALL OBJECTS

The CARONTE 9400 gamma monitor is designed to easily measure the radioactivity level of small objects such as boxes, tools or other similar equipments.

The materials to be monitored are placed by the operator on one side of the conveyor belt, which is activated by PLC commands. The mechanical cycle and the measurement procedure are entirely controlled by the remote software, in automatic or manual mode. In automatic mode the conveyor belt is constantly moving, and a set of three photocells allows the software to know the object position and properly manage the conveyor motion.

A background acquisition is needed before CARONTE 9400 can start the measurement procedure; the management software will automatically subtract the background value from the measurements.

If the alarm thresholds are exceeded, a proper visual and acoustic indication will be activated.

The automatic cycle consists in the following three stages:

1) First the length is determined by means of the first photocell, placed before the detectors, then the materials are positioned at the centre of the measurement area.
2) The radioactivity level is determined: the software performs the data acquisition for a preset time.

 
If the object is longer than the measurement area, consecutive steps are performed until the entire length of the object is scanned by the detectors.
3) Finally, after the measurement, the materials are carried at the end of the conveyor belt, which automatically stops; now the operator can remove the monitored object and place a new one on the other side of the conveyor. The cycle is automatically resumed.

The 4 detectors are mounted in a tunnel-shape configuration: two at the sides of the passageway, one under the conveyor (inside a drawer), and one at the top of the measurement area. The upper detector can be vertically moved to adapt to materials dimensions, improving the overall measurement sensitivity. The detectors are shielded with lead sheets on the external sides, to minimize the environmental background contribution to the measurement.

CARONTE 9400 is mounted on 4 blocking wheels, so it can be easily positioned and moved according to the customer needs. On the mechanical structure there are push-buttons to manually activate the conveyor belt and the upper detector positioning, if needed; there is also an emergency button which immediately and completely stops CARONTE 9400.


Additional Info

  • Main features:
    • Detectors: 4 shielded plastic scintillators
    • Upper detector: adjustable position along the vertical
    • Wheel-mounted structure
    • PLC controlled conveyor belt
    • Software remote management
    • Automatic, photocell-surveyed monitoring cycle
    • Parameter setting: measuring time, alarm thresholds, calibration factor
    • Measurement unit selection: cps, Bq, Bq/g
    • Automatic background subtraction
    • Monitoring of detector status
    • Measurement data storage and display
    • Push-buttons for manual controls and emergency stop
    • Ethernet connection to remote PC unit