pH/Oxi 340i
Operation
41
4.5
Calibration intervals (Int 3, Int 4)
For each measured variable, a time interval is stored. When it has ex-
pired, 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 func-
tion is reset and the interval 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)
Dissolved oxy-
gen
Int 4
14 days (d 14)
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 or Int 4 and
the required measured variable pH or O
2
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
