Two-Point Adjustment; Averaging - Ahlborn ALMEMO 710 Operating Instructions Manual

14. Wizards
The function ´Calculate´ produces the result, displayed on the next page.
Base value, factor, exponent, and in special cases also zero-point and gain are
used.

14.3 Two-point adjustment

Two-point adjustment without a zero-point is not exactly straightforward. How-
ever, we have the ´Two-point adjustment´ wizard to help.
1. Set up calibration resources for setpoint 1.
Enter setpoint 1
Either enter measured value in actual value 1 or
transfer measured value to actual value 1 Actual value 1 07.32 pH
2. Set up calibration resources for setpoint 2.
Enter setpoint 2
Either enter measured value in actual value 2 or
transfer measured value to actual value 2 Actual value 2 09.87 pH
The function ´Calculate´ produces the result, displayed on the next page.

With pH probes you can by pressing the ´Clr´ key restore the default
values, namely base value 7.00 and gain -0.1689. If a sensor is
locked it can be temporarily unlocked using the help box.

14.4 Averaging

The average value for a measured value is needed for various applications.
e.g. Smoothing a widely fluctuating measured value (e.g. wind, pressure, etc.)
Average flow velocity in a ventilation conduit
Hourly or daily average values for weather data (temperature, wind, etc.)
Also for consumption values (electric current, water, gas, etc.)
The average value
series of measured values (M
measured values used (N).
Average value
ALMEMO ® devices offer several different averaging modes.
These include measured value smoothing per selected channel with a sliding av-
eraging window, averaging over individual measuring operations selected by lo-
cation or by time, averaging over the full actual measuring duration, over a cy-
cle, or over specified measuring channels.
Users can, using the ´Averaging´ wizard, try all these modes in order to familiar-
ize themselves with the parameters required by each and the operating meth-
ods. There is also the ´Volume flow´ wizard, which can be used to calculate vol-
ume flow from the average velocity and the cross-section of a flow channel.
68 ALMEMO
M
of a measured variable is obtained by adding together a
) and then dividing this total by the number of
i
∑
M=( M )/ N
i
i
® 710
Setpoint 1 07.00 pH
Setpoint 2 10.00 pH
Zero point -0.32
Gain -0.1689