Flowserve NRGS 16-2 - Manual (Page 8)

8
Explanatory Notes
Scope of Supply
Function
Design
NRGS 16-2
1 Compact system type NRGS 16-2
1 Joint ring (of stainless steel 1.4301) D 33 x 39 DIN 7603
1 Installation Instruction
System Description
The compact system NRGS 16-2 works according to the conductivity measurement
principle. With the NRGS 16-2 a maximum of 3 levels can be signalled in conductive
liquids:
■ Low level alarm, pump ON, pump OFF with one normally open contact
The NRGS 16-2 has a level switch integrated in the electrode case for the controlling
of all functions. An external switching device is not required.
The NRGS 16-2 has two electrode rods for the detection of low water level. The
signalling of the low-level alarm is effected via two separate switching channels.
The conductivity of the liquid is used to signal the liquid level. Some liquids are
conductive, which means that they allow an electric current to flow through them.
For the safe functioning of this device a minimum conductivity of the liquid to be
measured is required.
The conductivity measurement method can detect two conditions: electrode rod
submerged / exposed or switchpoint reached / not reached. Before installation, the
length of the electrode rod must be adapted to the switching levels, e. g. for
max. / min. alarm, controlling of a valve or pump.
NRGS 16-2:
Screwed design 1" BSP, DIN ISO 228. Fig. 1