Instruction Manual

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 <M> key
while pressing the <RUN/ENTER> 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 <M> 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
29
9
6
°C
TP
pH
Reproducibility Response time
Better than 0.02 > 30 seconds
1 Call up the pH measuring mode with <M> and <▲> <▼> .
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).
3 Start AutoRead with <RUN/ENTER>.
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
<RUN/ENTER>.
5 To terminate the AutoRead function: Press the <AR> key.