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shade adjustment has two shade ranges (6-8 and 9-13) marked in two different
typefaces (positive and negative). The adjustment of the knob »Range« defines the
range which is being used.
Adjustment of sensitivity: Most welding applications can be performed with welding
light sensitivity set to maximum. The maximum sensitivity level is appropriate for low
welding current work, TIG, or special applications. The welding light sensitivity has
to be reduced only in certain specific surrounding lighting conditions in order to avoid
unwanted triggering. As a simple rule for optimum performance, it is recommended to
set sensitivity to the maximum at the beginning and then gradually reduce it, until the
filter reacts only to the welding light flashes and without annoying spurious triggering
due to ambient light conditions (direct sun, intensive artificial light, neighboring
welder's arcs etc.).
Opening time delay adjustment: The opening time delay can be adjusted from 0.1 to
1.0 seconds. It is recommended to use a shorter delay with spot welding applications
and a longer delay with applications using higher currents and longer welding intervals.
Longer delay can also be used for low current TIG welding in order to prevent the filter
opening when the light path to the sensors is temporarily obstructed by a hand, torch, etc.
Function welding/grinding: WF70 GDS electro-optical welding filter can be used
for both welding and grinding applications. By selecting the position »Grind«, the filter
switches off and it will not be triggered by the sparks generated during grinding. Before
restarting welding work, the knob should be set back to the »Weld« position.
RECOMMENDED SHADE LEVELS FOR VARIOUS WELDING APPLICATIONS
/ EN 379 /
WELDING
PROCESS
6
MMA
MAG
TIG
MIG heavy
metals
MIG light metals
Stainless, AI
Plasma cutting
Micro plasma
4
welding
CURRENT IN AMPERES
10
15
30
40
60
8
8
8
9
9
10
9
5
6
7
70
100
125
150
175
9
10
11
WF70 GDS
WF70 ES, WF70 DS
9
10
11
WF70 GDS
WF70 ES, WF70 DS
10
11
WF70 GDS
WF70 ES, WF70 DS
10
WF70 GDS
WF70 ES, WF70 DS
WF70 GDS
WF70 ES, WF70 DS
10
11
WF70 GDS
WF70 ES, WF70 DS
8
9
10
WF70 GDS
WF70 ES, WF70 DS
200
225
250
300
350
12
13
12
12
13
14
11
12
13
11
12
13
12
13
11
12
13
400
9
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