Xylem pH/ION 3400i ION SELECTIVE ELECTRODE ANALYZER - Manual (Page 41)

pH/ 3400i Operation
41
4.5 Calibration interval (Int 3)
The flashing probe symbol reminds you to calibrate regularly (pH/
ORP). When the fixed calibration interval (Int 3) has expired, the probe
symbol flashes. It is still possible to measure. The calibration interval is
set to 7 days in the factory.
Note
To ensure the high measuring accuracy of the measuring system, cal-
ibrate after the calibration interval has expired.
Setting the calibration
interval
You can change the interval set in the factory (1 ... 999 days):
1 Switch off the measuring instrument.
2 Press the <M> key and hold it down.
3 Press the <ON/OFF> key.
The display test appears briefly on the display. After this, the
measuring instrument automatically switches over to configu-
ration.
4 Press the <RUN/ENTER> key repeatedly until Int 3 appears.
Example:
5 Set the required interval (in days) until the next calibration with
<
▲> <▼>.
6 Confirm with <RUN/ENTER>.
7 Switch to the measuring mode with <M>.
2 d
°C TP
mV/pH
mol/L
Auto Store
RCL
LoBat
CalError
ARng AR
Baud
Day.Month No.
Ident Year
1
U
%
°F
S
TempError
mg/L
% ppm
ISE
7
3 nt
pH
Time
AutoCal DIN
AutoCal TEC ConCal
I
d