6.3 Correction of the Meas. Value and Compensation
To achieve maximum accuracy of
measurements it is possible to correct all
sensors with regard to zero point and slope
(gain) in the ´Standard Menu´, by the push
of a button. Additional correction functions
are provided in the ´User Menu U1´
(selection see 5.1) ´Meas. Correction´. By
entering a setpoint the correction value will
be automatically calculated and stored in the
sensor connector. A corresponding
compensation is provided for sensors, which
are affected by the ambient temperature or
the atmospheric pressure.
6.3.1 Setting the Meas.Val. to Zero
The user can zero the measured value at certain locations or at certain times in
order to check the deviation from this reference value. After selecting the
function ´Meas. Value´ (see 5.4) the key <ZERO> can be used to store the
displayed measured value as base value and, as a result, to set it to zero.
Function ´Meas. Value´:
00: °C
23.4
Function ´Set Meas. Value To Zero´:
<
ZERO
>
Meas.Val.:
00: °C
!
00.0
Base value:
BaseValue: 23.4°C
Please note that this function is only available if the locking code is
set below 5 (see 9.4).
As long as the deviation from the base value is indicated (instead of
the actual measured value) the symbol
!
appears in the display.
The base value must be cleared in order to re-obtain the actual measured
value (see 9.6).
6.3.2 Sensors adjustment, Zero Point and Slope
Many sensors must be adjusted at least once or at regular intervals to
compensate for instabilities. For this purpose, a specific
zero point
adjustment
is available, in addition to the ´Set Meas. Value to Zero´
mentioned above, as some sensors require an additional scaling (e.g. pH
probes). In this function the zero point error is not stored as base value but as
zero point correction (see 9.7). In this case, the locking mode must be set
below 4 (see 9.4).
26
ALMEMO
®
2590-9
Displaying a Measuring Point
C
!
REC COM
|> >|
R01
"
Meas.Correction
10
:
24
.
5ms
L840 Pitot Tube A
!
Locking: 3
Setpoint: 25.0ms
Zero Point: 0.7ms
Factor: 0.6891
TempComp: 245.7°C
AtmPress: 1027mb
M
▲
PRINT START MANU
