Xylem VARIO WATERPROOF PH METER User Manual
Page 26
Operation
VARIO pH
26
ba75373e04
07/2006
Three-point
calibration
Note
You can also terminate the calibration prematurely with <
E
>. The values
of the two-point calibration for slope and asymmetry will then remain stored.
The asymmetry that was determined (ASY) appears on the display. By
pressing <
g
> you display the slope of the calibration line (SLO). After a
successful calibration the probe symbol appears in the measured value
display.
Note
If no valid calibration can be accomplished, the Err3 error message appears
on the display. Measuring is not possible in this condition. Possible causes
and actions for error elimination can be found in chapter 6 W
15
To continue the calibration with a further buffer, thoroughly rinse the
electrode with deionized water.
16
If necessary, enter the temperature of the third buffer solution
manually.
17
Immerse the pH electrode in the buffer solution.
18
Start measurement with <
g
>.
The unit of the measured value display flashes (AutoRead) as long
as the measured value is not stable.
19
Toggle between the display of the nominal buffer value (pH) and the
electrode voltage (mV) as necessary with <
"
> [<pH or mV>].
20
Wait until the measured value is stable.
The value of the asymmetry that was determined (ASY) appears on
the display.
or
Accept the measured value with <
g
>.
The value of the asymmetry that was determined (ASY) appears on
the display.
21
By pressing <
g
> display the slope of the calibration line (SLO).