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Position locked dark state
When the welding fi lter is locked in the dark state and the welding fi lter
turns OFF (after 1 hour inactivity), it will automatically reset to sensitivity
setting 2.
Delay
The delay function should be used to set the recovery delay from dark to
light of the welding fi lter according to welding method and current. See
table on page 250.
Comfort mode for tack welding.
This setting may help reduce eye fatigue resulting from the eye constantly
adjusting to differing light levels during tack welding. Tack welding mode
uses an intermediate light state (shade 5). If an arc is not struck within 2
seconds the welding fi lter will switch to the normal light state (shade 3).
Note that the Sensitivity and Delay function are using the same LED
indicators on the display.
Low battery indicator
The batteries should be replaced when the low battery indicator fl ashes or
LEDs do not fl ash when the buttons are pressed.
WARNING
Should the Speedglas 9100 welding shield fail to switch to the dark state
in response to an arc, stop welding immediately and inspect the welding
fi lter as described in these instructions. Continued use of a welding fi lter
that fails to switch to the dark state may cause temporary vision loss. If the
problem cannot be identifi ed and corrected, do not use the welding fi lter,
contact your supervisor, distributor or 3M for assistance.
MAINTENANCE
Replacement of outer protection plate.
Remove silver front cover. (see fi gure C:1)
Remove the used outer protection plate and place the new outer protection
plate on the welding fi lter. (see fi gure C:2)
Silver front cover must always be used (see fi gure C:3).