Owner's manual

pH/ 3400i Operation

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>.

°C

mV/pH

mol/L

Auto

Store

RCL

LoBat

CalError

ARng

Baud

Day.Month No.

Ident

Year

°F

TempError

mg/L

% ppm

ISE

Time

AutoCal DIN

AutoCal TEC

ConCal