Sea-Level Correction For Absolute Pressure Sensors; Averaging Function - WIKA CPH6300 Betriebsanleitung

6 Commissioning, Operation

6.4.3 Sea-level correction for absolute pressure sensors

The device displays the absolute pressure. This is not necessarily the same like the values given
by weather stations! The weather stations are displaying the pressure at sea level. Usually the
sensor is placed above sea level and therefore the pressure loss resulting from the actual level
above sea level has to be considered, if the value at sea level (zero) should be measured! To
correct the measuring display, activate the "Sea-Level-Function" (SL, see chapter 6.3, setting is
only possible, if an absolute pressure sensor is connected to sensor connection 1). Then enter the
altitude above sea level of the sensor's location in meters (Alti, see chapter 6.3). When activated,
the display shows the SL-arrow and the device displays the pressure value at sea level.
When two absolute pressure sensors are connected, the sea level function for both
corresponds to the setting of sensor 1
(Only 2-channel version)

6.4.4 Averaging function

The averaging function concerns the display values (LCD and interface).
It is completely independent from the averaging of the logger function FASt and
P.dEt.
The averaging integrates the measuring values during a selectable period of time and then
calculates the average display value. It is independent from the selected kind of measuring (slow,
fast, peak detect).
As long as not enough values have been collected i. e. for the selected averaging time (seconds)
to calculate an average value, the upper display shows "----", the lower display a 'countdown'.
During an active low-power-logging procedure the averring is always deactivated.
Function of min/max-value memory during averaging:
If averaging is activated and slow measuring is selected (rAtE-Slo), the min-/max-value memory
■
refers to the average display value.
If averaging is activated and fast measuring is selected (rAtE-FASt or P.dEt), the min-/max-
■
value memory refers to the internal measured values (fast peaks can be detected).
WIKA Operating Instruction, Model CPH6300
GB
19