Multi 197i Operation
23
ba75339e04 07/2009
Calibration evaluation After calibrating, the measuring instrument automatically evaluates the
calibration. The asymmetry and slope are evaluated separately. The
worst evaluation appears on the display.
Preparatory activities
Display Asymmetry
[mV]
Slope
[mV/pH]
-15 ... +15 -60.5 ... -58
-20 ... +20 -58 ... -57
-25 ... +25 -61 ... -60.5
or
-57 ... -56
Clean the electrode according
to the electrode operating
manual
-30 ... +30 -62 ... -61
or
-56 ... -50
E3
Perform error elimination ac-
cording to chapter 6 W
HAT TO
DO IF...
< -30 or
> 30
< -62 or
> -50
1 Connect the pH electrode to the measuring instrument.
If necessary, press the <M> key repeatedly until the status dis-
play pH (pH measurement) or U (measurement of the ORP
voltage) appears.
2 Keep the buffer solutions ready.
3 Adjust the temperature of the solution and measure the current
temperature if the measurement is made without the use of a
temperature sensor (the TP display indicator is missing from
the display).
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