Measured Value Correction And Compensation; Set Measured Value To Zero - Ahlborn ALMEMO 5690-2M Operating Instructions Manual

11. Measuring with the measuring menus
As soon as you clear the memory, the current measured value will appear (be -
cause measuring is continuous). Each time a measuring operation starts, if the
device has been so configured, the peak values will be cleared ; (for default set-
ting see 12.5.8). Cyclic clearing can be activated by programming the averaging
mode CYCL (see 11.4.7).

11.2 Measured value correction and compensation

To achieve maximum measuring accuracy the
zero-point of the sensors can be corrected in
all menus at the touch of a button. More cor-
rection functions are provided in the user menu
U1 Measured value correction
10.1). By entering a setpoint the correction
value will be automatically calculated and
stored in the sensor connector. For sensors af-
fected by ambient temperature or atmospheric
pressure the appropriate compensation can
then be provided.

11.2.1 Set measured value to zero

One very useful function is to zero the measured value at certain locations or at
certain times as a reference value in order then to observe subsequent devia-
tion. Having selected the measured values function in any menu (see 10.4) you
will be shown a help window listing all the possibilities for measured value cor-
rection. If you press
saved as base value and thus set to zero.
Function Select measured value
Function Zero-set measured value
To execute press
Measured value
Base value
If the function is locked (see 12.3.4) the base
value is not saved on the connector but only
temporarily to RAM where it is retained until
the device is next switched off. This function can
be blocked by using locking level 6.

Whenever the display indicates a deviation from the base value (in-
stead of the actual measured value) the symbol º will appear.
To obtain the actual measured value again the base value must be
cleared; (see 12.3.6).
32 ALMEMO
(selection, see
<ZERO> , PROG
® 5690-2M
C © REC COM l© ©l R01 * ´´´´´´µµµµ¶
±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
01: 25.45 m/s
L840 pitot tube
Locking mode:
Setpoint:
5 Base:
5 Factor:
4 Zero corr:
4 Slope corr:
Temp. comp:
Air. pressure:
START MANU M PRINT ESC
the displayed measured value will be
00:
<ZERO>
PROG
00:
base value
Sensor ist locked
-Zero setting temporarily
press key: PROG
-To cancel press key: ESC
3
25.0 mls
-----
0.6891
0.7 mls
-----
245.7 °C
1027 mb
23.4 °C
00.0 °C º
23.4 °C
º