Xylem handylab pH 11 - Manual (Page 17)

handylab pH 11 Operation
17 ba75366e04 01/2011
4.2.2 Measuring the pH value
Setting the
resolution
The measuring instrument shows the pH value with a resolution of 0.01 or
0.001. (Default setting is 0.01). To change the resolution, press the key
while pressing the key.
AutoRead
(drift control)
The AutoRead function (drift control) checks the stability of the measurement
signal. The stability has a considerable impact on the reproducibility of the
measured values.
For identical measurement conditions, the following criteria apply:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the pH electrode in the test sample.
3 Press the key until pH appears on the status display. The
pH value appears on the display.
mV/pH
mol/L
8
Auto Store TempError
RCL
LoBat
AutoCal DIN CalError
ARng AR AutoCal TEC ConCal
Time Baud
Day.Month No.
Ident Year
1
U
%
°F
S
mg/L
% ppm
ISE
8 4 2
2 99 6
°C TP
pH
Reproducibility Response time
Better than 0.02 > 30 seconds
1 Call up the pH measuring mode with and <
▲> <▼> .
2 Activate the AutoRead function with .
The current measured value is frozen (hold function).
3 Start AutoRead with .
AR flashes until a stable measured value is reached.
This measured value is transmitted to the interface.
4 If necessary, start the next AutoRead measurement with
.
5 To terminate the AutoRead function: Press the key.