Comparison Tesla Weld 30.999 vs Tesla Weld 30.997

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	Tesla Weld 30.999	Tesla Weld 30.997
	from $80.92 Outdated Product	from $72.08 Outdated Product
all specs only differences
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Type	chameleon helmet	chameleon helmet
Specs
Light filtering levels	4 DIN	4 DIN
Min. degree of darkening	5 DIN	5 DIN
Max. degree of darkening	13 DIN	13 DIN
Protection from UV/IR	16 DIN	16 DIN
Turn-on time	33.3 ms	33.3 ms
Filter viewing area (WxH)		100x55 mm
Filter cartridge dimensions (WxH)	114x133 mm	110x90 mm
Optical sensors	4	4
Operating temperature	-5 – 55 °C	-5 – 70 °C
Helmet weight		495 g
Filter functions
Darkening adjustment	external mechanical	external mechanical
Sensitivity adjustment	external mechanical	external mechanical
Delay time adjustment	external mechanical	external mechanical
Grinding mode	external mechanical activation	external mechanical activation
Colour rendering	plain (shades of green)	plain (shades of green)
Design features	controls outside	controls outside
Color
Added to E-Catalog	october 2017	february 2016

Filter viewing area (WxH)

The size of the transparent part of the light filter — the "working window", the area through which the welder sees the place of work. A larger working window provides ease of use and a wide field of view, but it significantly affects the cost of the mask and somewhat reduces the strength of the light filter.

Filter cartridge dimensions (WxH)

The overall dimensions of the light filter for which the mask is designed, taking into account the working window, protrusions for mounting, batteries, sensors and other structural elements. This indicator is especially important for models that are not equipped with light filters: without knowing the size, it is very difficult to choose the right cartridge. In other cases, data on the size of the cartridge is needed mainly when looking for a replacement for a failed colour filter.

Operating temperature

The range of ambient air temperatures at which the mask is guaranteed to be able to function normally. This parameter is especially important for "chameleons" (see "Functions"), because. the performance of the automatic filter directly depends on external conditions (in particular, at low temperatures, the response time may increase).