Product Description
DUSTHUNTER T · Operating Instructions · 8012428 V 2.0 · © SICK MAIHAK GmbH Germany 21
Data transfer to and power supply (24 V DC) from the control unit run via a shielded cable
with 4 wires and plug-in connector. An RS485 interface is available for service purposes.
Clean air to cool the probe and keep the optical surfaces clean is fed via a purge air
connection.
The sender/receiver unit is fastened to the duct with a flange with tube (
→
p. 19, Fig. 7).
The alignment of the optical axes as well as the current device state (operation/
malfunction) are shown in the control window.
On DUSTHUNTER T100/T200, the housing with fitted sender/receiver unit can be swiveled
to the side after the knurled screws have been loosened. Optics, electronics and
mechanical components can then be easily accessed for maintenance tasks.
Self-alignment functionality (only DUSTHUNTER T200)
The sender module can be moved horizontally and vertically using motors and bevel gears
so that the sender light beam can be adjusted by approximately 2° in all directions.
Tracking is performed using the measurement signal on the 4 quadrants of the
measurement receiver. This allows automatic compensation of optical axis misalignment
caused by, for example, distortion of duct walls due to temperature fluctuations.
Figure 9 Self-alignment principle design
Versions
A type code identifies the special sender/receiver unit version:
(Sender/receiver unit)
Base plate
Retaining
bracket
Sender
module
Bevel
gear
A
A
Drive
Tension spring
Sender/receiver unit: DHT-TXX
Contamination measurement:
- 0: Without
- 1: With contamination measurement on one side (sender side only)
- 2: With contamination measurement on both sides
Self-alignment:
- 0: Without
- 1: With
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