User's Manual
Table Of Contents
- Table of Contents
- 1 Introduction
- 2 Safety information
- 3 Design and Function
- 4 Installation
- 4.1 Standard equipment
- 4.1.1 Scope of delivery
- 4.1.2 Unpack the titrator
- 4.1.3 Position the titrator
- 4.1.4 Adjust the angle of the terminal
- 4.1.5 Connect and disconnect the terminal
- 4.1.6 Connect the titrator to the power supply
- 4.1.7 Disconnect the titrator from the power supply
- 4.1.8 Set up the titrator for a general titration
- 4.1.8.1 Attach the titration stand to the titrator
- 4.1.8.2 Swivel the titration stand
- 4.1.8.3 Attaching and removing the titration vessel
- 4.1.8.4 Recommended positions for sensors, tubes and stirrers
- 4.1.8.5 Connect the compact stirrer
- 4.1.8.6 Connect the measuring electrode
- 4.1.8.7 Attaching the electrode arm
- 4.1.8.8 Insert and connect a burette
- 4.1.9 Connect a Rondolino TTL sample changer
- 4.1 Standard equipment
- 5 Operating the instrument
- 6 Transporting the titrator
- 7 Care and maintenance
- 8 Disposal
- 9 Technical data
5.2.2 Rinsing and filling the burette
To fill the burette and tubes with titrant and remove any air bubbles from the system, rinse the burette three
times with titrant with the manual operation Rinse.
§
The titrator is prepared as described in [Preparation}Page23].
1 To ensure that the system has no leaks, check all tubes and closing points for firm seating.
2 Make sure that the free end of the dispensing tube for the titrant is placed in the titration vessel or another
container.
3 Tap Manual > Burette > Rinse.
ð The dialog Rinse opens.
4 Set Titrant to NaOH 0.1mol/L.
5 Set Cycles to "3".
6 To start the rinse procedure, tap Start.
ð The rinse procedure starts and an animation shows the progress.
7 When the rinse procedure is complete, tap OK.
ð The dialog Rinse opens.
ð The burette is filled and the tubes are free of air bubbles.
5.2.3 Calibrating and testing the sensor
The following describes how to calibrate a pH sensor or carry out a sensor test.
Preparation
1 Make sure no analysis is running on the titrator.
2 Connect the plug of the sensor (DGi115-SC) to the port "SENSOR" of the titrator.
3 Insert the sensor into the titration head.
4 Prepare three titration vessels containing buffer solutions (pH 4.01, 7.00 and 9.21).
5.2.3.1 Calibrate the sensor
1 Tap Methods > New > Standard method templates > Calibration.
ð A list of method functions appears.
2 Tap Sample (Calib).
ð The dialog Sample (Calibration) opens.
3 Make sure Sensor is set to DGi115-SC.
4 Make sure the settings for the buffer are as listed below.
Buffer 1: 4.01
Buffer 2: 7.00
Buffer 3: 9.21
5 Tap OK > Save
ð The new method is saved in the method list, with the next free ID and with the title Calibration.
6 Tap Start.
ð The dialog Start analysis opens.
7 To ensure that the system has no leaks, check all tubes and closing points for firm seating.
8 Tap Start.
ð The system asks you to attach the titration vessel with sample 1 to the titration arm.
9 Attach the titration vessel with the buffer solution with pH 4.01 to the titration arm and tap OK.
ð The measurement starts after the stirring time.
ð During the measurement the online screen displays the time, the measured value in [mV] and a
curve.
ð During the calibration, the system will output a record on the printer.
ð When the measurement is completed, the system asks you to attach the titration vessel with the next
sample to the titration arm.
24 Titration Excellence