Manual

Operation handylab pH/LF 12
46
ba75370e03 11/2009
4.5 Calibration intervals (Int 3, Int 5)
For each measured variable, a time interval is stored. When it has expired,
you will be reminded to calibrate. After a calibration interval has expired, the
probe symbol of the relevant measured variable flashes. It is still possible to
measure. By calibrating the relevant probe, the function is reset and the in-
terval starts anew.
The following calibration intervals are set in the factory:
Setting the
calibration interval
You can change each of these intervals (1 ... 999 days):
Measured
parameter
Designation Default setting
pH/ORP Int 3 7 days (d 7)
Conductivity Int 5 180 days (d 180)
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 Int3 or Int5 and
the required measured variable pH or 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>.
O
8
1
°
C
TP
ARng
mg/l
LoBat
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
S
RCL
AR
Store
Auto
°
F
1/
cm
/
K
%
TDS
Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
7
t
3
n
1
d
Time
Cal
pH