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In addition, the following symbols are used in these operating instructions:
2.2
Intended use
This product may only be used with liquids as a level switch, level controller
for filling or level controller for emptying.
The product detects minimum or maximum levels and switches pumps or
valves to control levels of liquids.
The product consists of a control unit and one PTC thermistor probe (level
switch) or two PTC thermistor probes (level controller for filling and empty-
ing). The product may only be used with PTC thermistor probes type 937 and
type 150.
The product may only be used for the following liquids:
With the PTC thermistor probe type 937 only for:
•
Fuel oil EL, L or M
With the PTC thermistor probe type 150 only for:
• Water
•
Fuel oil EL, L or M
•
Diesel fuel or low-viscosity lubricants of group AIII and danger class AIII
•
Motor oils, gearbox oils and hydraulic oils
• Vegetable oils and transformer oils
•
Antifreeze agents
•
Oil-water mixtures, emulsions
as well as comparable liquids (not AI, AII) with identical heat conductivity.
These liquids must be compatible with the following
Information on safety
This is the general safety alert symbol. It alerts to injury haz-
ards or equipment damage. Comply with all safety instruc-
tions in conjunction with this symbol to help avoid possible
death, injury or equipment damage.
This symbol alerts to hazardous electrical voltage. If this
symbol is used in a safety message, there is a hazard of
electric shock.
RG 210
EN
4
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