Installation, 7 optional limit switch – KROHNE BM 26 BASIC_ADVANCED EN User Manual
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INSTALLATION
3
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BM 26 BASIC/ADVANCED
www.krohne.com
10/2012 - 4000347004 - HB BM26 Basic/Adv R04 en
3.7 Optional limit switch
INFORMATION!
The level switches are not attached to the device before delivery. Remove the switches from the
packing and obey the instructions that follow.
WARNING!
Too much heat can cause damage to the limit switch. If you put insulation around the bypass
level indicator, do not cover the limit switch housing. Make sure that there is approximately
15 mm / 0.6
¨
of empty space between the limit switch and the insulation.
Figure 3-9: Limit switches and insulation for the measuring chamber
1 Limit switch housing
2 Insulation around the measuring chamber (cross-section)
3 Measuring chamber (cross-section)
Empty space between the limit switch and the insulation for the measuring chamber, a ≥15 mm / 0.6¨.
CAUTION!
If liquid density changes, the switch will not detect level correctly. Recalculate the position of the
switch according to the true liquid density and repeat the installation procedure that follows.
CAUTION!
The switching point of the switch when the level increases is not in the same as the switching
point of the switch when the level decreases. Does the limit switch have to be open when the
float is above (for HIGH limit switches) or below (for LOW limit switches) the switching point? For
more data, refer to Definition of switching point offset
Definition of switching point offset
Definition of switching point offset
Definition of switching point offset.
WARNING!
If you put insulation around the bypass level indicator, do not cover the limit switch housing. Too
much heat can cause damage to the limit switch.