FISCHER Mess- und Regeltechnik GmbH
Product and functional description | 2
BA_EN_NK10
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2.4 Design and mode of operation
The swim system of the fill level limiter is contained in the fluid-filled reservoir
(expansion tank). The swimming motions generated by changes in the fill level
are transmitted directly to the micro-switch S1 by a swimmer rod sealed in a
stainless-steel bellows. The fulcrum of the swimmer rod is located outside of the
pressure chamber.
There is also a test button outside the pressure chamber with which a function
check as per DIN 4754-3 can be run without lowering the fill level. When
pressed, the body of the swimmer is moved against its buoyancy.
The factory default switching point of micro-switch S1 is set so that it switches
when the swimmer rod is horizontal. The optional warning switch S2 switches
approx. 2.5 mm before S1.
The fill level height at which switching is triggered depends on the density of the
heat carrier. The lowest density at which a secure function is guaranteed is 0.6
kg/dm³.
When the medium has a density of 1.0 kg/dm³, the switching level is approx.
60mm below the middle of the flange or socket.
Содержание NK10 B
Страница 1: ...Operating manual NK10 Fill Level Limiter 09005111 BA_EN_NK10 Rev ST4 E 01 19 09005111 ...
Страница 19: ...FISCHER Mess und Regeltechnik GmbH Attachments 8 BA_EN_NK10 19 28 Fig 13 CE_DE_NK10 part2 ...
Страница 22: ...8 Attachments FISCHER Mess und Regeltechnik GmbH 22 28 BA_EN_NK10 Fig 16 DNVGL_TAA000020S_Page_2 ...
Страница 23: ...FISCHER Mess und Regeltechnik GmbH Attachments 8 BA_EN_NK10 23 28 Fig 17 DNVGL_TAA000020S_Page_3 ...
Страница 27: ...FISCHER Mess und Regeltechnik GmbH Attachments 8 BA_EN_NK10 27 28 Fig 21 SIL_IEC61508_DE_EN 1 Part2 ...