ZERO: 0% Opacity = 100% Transmission = All light reflected SPAN: 100% Opacity
= 0% Transmission = No light reflected
During ZERO calibration, all possible obstructions to the light beam (such as oil mist,
smoke or dust) must be absent in the section between the transceiver and the reflector.
7.1 Zero calibration
• First ensure no obstruction to the light beam
• Then press and hold ZERO until all blue signal LEDs illuminate. Release ZERO, then:
7.2 Auto Span calibration
• After Zero calibration, the auto Span calibration will automatically be performed
within 1 minute if the beam is blocked. The transceiver interface of an auto Span cali-
bration will indicate as Figure 4-7.
• Alarm and Warning LEDS becomes ON as Figure 4-8.
• After the light beam is unblocked, it will endure a few second as the Figure 4-7 before
the beam becomes to the normal operation as Figure 4-2.
7.3 Span calibration
A manual Span calibration might be considered as another possibility beside an auto Span
calibration. You can carry out a manual Span calibration as following
First block the light beam by either
• Unmount the transceiver and use a hand to block the beam, or
• Set the SPAN Target to the Audit Module if you have the Audit module Alarm and Warn-
ing LEDs become ON when the beam is blocked.
• Then press and hold SPAN until all blue signal LEDs illuminate.
To Next Page
Loading...
Need help?
General