Richter SAFERUN - Manual (Page 9)

Series MNK, MNK-B, SAFERUN ® Pump condition monitoring system Page 9
9230-070-en Revision 01
TM 7691 Edition 11/2009
6 Commissioning with the integrated display and control unit
The system is tested and subjected to basic calibra-
tion as standard ex works together with the relevant
pump. Tap water is used as the medium conveyed.
Standard A: MNK with SAFERUN
® can insert without
transformer
Standard B: with SAFERUN ® order incl. transformer
Should, during rating, no information have been pro-
vided on the medium, the density of the water is cho-
sen as the basic setting.
6.1 Adaptation to other media
If the pump conveys a fluid other than water, it is usu-
ally necessary to correct the basic calibration. Adapta-
tion can be performed using two methods:
Allowance of the density of the medium or
The two-point method
Both methods require the transfer of data, which
can take place in two different ways:
Wireless via radio signals:
The data are transferred via the RFID trans-
ponder integrated in the back plate using a
mobile unit (PDA) with a suitable writ-
ing/reading module (CFC reader), which, in the explo-
sion-protected version, permits communication in the
potentially explosive area.
Via the internal serial interface:
The RS232 interface mounted directly on the pc board
of the ignition protection class "Intrinsically safe" can
also be used for transferring data to the SAFERUN
® .
Access to the serial interface is only possible
with the housing opened and using a special
service cable (PROG-CABLE-SAFERUN
® )
(canNOT be used in the potentially explosive area, i.e.
can only be used in the "Safe area"!).
Special service software is also necessary for com-
munications.
As the use of the RS232 interface requires special
unit-specific know-how, the calibration data should
only be performed in this way by the manufacturer.
6.1.1 Allowance of the density of the
medium
Note:
see Section 1.4.
If the data of the medium at operating temperature are
known during the rating of the pump, its density and
already be allowed for during the configuration of the
system at the works.
The value entered is then taken into account during
operation to determine the performance data.
The density value can be changed at a later date.
NOTE: The influence of the temperature on the den-
sity or the viscosity of the medium is not allowed for
with this method.
This simple method for correcting the basic calibration
to suit another medium is generally a good compro-
mise for most applications (e.g. fluctuating operating
data).
6.1.2 Two-point correction
Note:
see Section 1.4.
If higher demands are placed on the accuracy of the
SAFERUN
® , the so-called two-point method can be
applied, which permits a simple, quick and compre-
hensive correction on site. For this purpose, two con-
ditions must be satisfied:
The pump must be able to be operated at two dif-
ferent operating points (throttle positions) and
both values must be able to be determined on site.