Reset Mode - Siemens SITRANS F series Operating Instructions Manual

SITRANS F C MASSFLO 

5.6 Reset mode

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5. Commissioning
Reset mode
In the reset mode menu the totalizer 1 and 2 and the batch cycle counter can be reset.
0-point adjustment
0-point adjustment of the flow meter is done in the Zero Adjust menu. The adjustment can be
made automatically where the meter measures and calculates the correct 0-point. In manual
mode the 0-point can be programmed if this is known. Normally the Automode is used.
Zero adjust time determines the period of time for the 0-point adjustment. As default a period
of 30 sec. is used which normally is enough for a stable 0-point mesurement. If however the
flowmeter is used where small flow rates are measured very accurately, a longer integration time
can be selected, to obtain a better 0-point measurement.
Setting the 0-point is carried out by activating Zero Adjust. A number of individual 0-point
adjustments are then made. The 0-point found is shown as Zero Adjust. The value Zero Sigma
shows the standard deviation of the individual measurements made. The standard deviation
(Zero Sigma) must be within a window, which is predefined by Siemens Flow Instruments . This
window is called Sigma Limit. If the standard deviation is outside the window the following mes-
sage is shown in the display: "Zero Sigma exceeds Sigma Limit". In this case check the installation,
ensure that the pipe is full and that there is absolute 0-flow present. Then repeat the 0-point
adjustment. The new 0-point is automatically stored in the SENSORPROM
at power down situations.
A5E02944883-AA
 and hence will remain