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Instruction for use | Supercal 5
13. Appendix
13.1 Extra Information for Supercal 5 S
13.1.1 The “Cut Off” Function of the Superstatic 440
The combination of the Supercal 5 I with the Superstatic 440 static flow sensor defines and
limits the possible flow measuring range ex works with a lower and an upper threshold val
-
ue (“cut off” and “flow saturation”).
The “cut off” function can only be stored in the calibration and measurement relevant part
of the Supercal 731 by violating the calibration seal.
As soon as the flow rate drops below the programmed “cut off”, no flow measurement takes
place. Therefore, no volume is cumulated.
If the flow rises above the flow saturation, the flow measurement stagnates at 2,4 × nominal
flow, but the volume is still cumulated. In this case the red led will light on and an error
message event will be recorded.
The “cut off” function for the 440 flowmeter can also be used for hydraulic effects within the
heating system, e.g. system vibrations. This makes the measurement less sensitive, which
makes it easier to isolate a possible erroneous measurement.
In case of Supercal 5 S, the threshold values “cut off” and “flow saturation” are able to be
customized by Software in Supercal 5 Calculator with
verifier
level user.
Note
The threshold values of the “cut off” function are to be regarded as
autonomous from the two additional threshold values specified in the
standard (Qa and Qmin). However, the “cut off” value must not exceed
Qmin.
Qa Qmin
Qt
Qn Qmax
Qi (OIML)
0
''Cut off''
''Flow saturation''
