User Manual

Operation Multi 3500i

Preparatory activities Perform the following preparatory activities when you want to calibrate:

Carrying out an

ISE calibration

Proceed as follows to calibrate the instrument:

1 Connect the ISE combination electrode to the measuring in-

strument. The pH/mV/ISE measuring window is displayed.

2 Keep the standard solutions ready.

3 Measure the temperature of the standard solutions using a

thermometer.

1 In the measured value display, select the ISE measuring win-

dow with <▲><▼> and <M>.

2 Start the calibration with <CAL>.

The calibration display appears.

3 Thoroughly rinse the electrode with distilled water.

4 Immerse the electrode in standard solution 1.

5 Select the Set standard setting with <▲><▼> and press

<MENU/ENTER>.

6 Set the concentration of the standard solution with <▲><▼>

and press <MENU/ENTER>.

7 Measure the temperature of the standard solution using a ther-

mometer.

8 Select the Set temperature setting with <▲><▼> and press

<MENU/ENTER>.

9 Set the temperature with <▲><▼> and press

<MENU/ENTER>.

10 Select Continue with <▲><▼> and press <MENU/ENTER>.

The standard solution is measured.

The measured value is checked for stability (AutoRead).

i Immerse sensor in std. 1

Set temperature:24 °C

Continue

Set standard: 0.010 mg/l

ISE <CAL>