Metrohm 848 Titrino plus User Manual Page 84
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7.1 Dynamic equivalence point titrations (DET)
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848 Titrino plus
Input range –125 - 125 µA (Increment: 1)
Default value 5 µA
U(pol)
The polarization voltage is the voltage applied to the polarizable electrode
during an amperometric measurement. This parameter is available only
with U(pol) determinations.
Input range –1250 - 1250 mV (Increment: 10)
Default value 400 mV
Electrode test
For polarizable electrodes, an electrode test can be carried out. A check is
made that the electrode is properly connected and that no short-circuit is
present. The electrode test is carried out when the determination is star-
ted. This parameter is available only with I(pol) and U(pol) determinations.
Selection on | off
Default value off
Stirrer
When this parameter is switched on, then the stirrer is switched on at the
start of the determination.
Selection on | off
Default value on
Stirring rate
Setting the stirring rate. It can be set in steps of –15 to +15. The default
setting 8 corresponds to 1000 U/min. The formula for calculating the rota-
tional speed is specified in chapter 10.2, page 118. The optimum stirring
rate can be tested in the manual control.
The algebraic sign of the stirring rate changes the direction in which the
stirring is done. When the stirrer is viewed from above, this means:
￭ "+": counterclockwise rotation
￭ "–": clockwise rotation
Input range –15 - 15
Default value 8
7.1.3 Stop conditions
Menu ▶ Parameters ▶ Stop conditions
The conditions for stopping a titration are defined under Stop condi-
tions.
- 848 Titrino plus 1
- Table of contents 5
- 6 System settings 52 6
- 7 Parameters 68 7
- 9 Troubleshooting 115 7
- 10 Appendix 117 8
- 12 Warranty (Guarantee) 135 8
- 13 Accessories 137 8
- Index 144 8
- Table of figures 9
- 1 Introduction 11
- 1.2 About the documentation 12
- 1.3 Safety instructions 14
- 1.3.5 Recycling and disposal 15
- 2 Overview of the instrument 17
- 3 Installation 19
- 3.3 Connecting a stirrer 21
- 3.4 Connecting a balance 22
- 6.2148.030 25
- 4 Titrations 27
- 4.3 Endpoint titration (SET) 28
- 5 Operation 29
- 5.2.1 The keypad 30
- 5.3 Formula editor 33
- 5.4 Methods 35
- 5.4.2 Saving a method 36
- 5.4.3 Loading a method 37
- 5.4.4 Exporting a method 38
- 5.5 Control 39
- 5.6 Sample data 40
- 5.7 Sample table 42
- 5.9 Live modifications 47
- 5.10 Results 50
- 5.11 Statistics 51
- 5.13 Manual Control 54
- 5.13.1 Dosing 55
- 5.13.2 Measuring 59
- 5.13.3 Stirring 60
- 6 System settings 62
- 6.2 Managing sensors 66
- 6.3 Managing solutions 68
- 6.4.1 General 70
- 6.5 File management 72
- 6.7 Instrument diagnosis 76
- 6.7.2 Diagnosis functions 77
- 7 Parameters 78
- 7.1.2 Titration parameters 79
- 7.1.3 Stop conditions 84
- 7.1.4 Evaluation 86
- 7.1.5 Calculation 89
- 7.1.6 Statistics 91
- 7.1.7 Reports 91
- 7.2.1 Start conditions 93
- 7.2.2 Titration parameters 94
- 7.2.3 Stop conditions 99
- 7.2.4 Evaluation 100
- ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 101
- ￭￭￭￭￭￭￭￭ 101
- 7.2.5 Calculation 103
- 7.2.6 Statistics 105
- 7.2.7 Reports 105
- 7.3.1 Conditioning 107
- 7.3.2 Start conditions 108
- 7.3.3 Titration parameters 110
- 7.3.4 Control parameters EP1 112
- 7.3.5 Control parameters EP2 115
- 7.3.6 Stop conditions 115
- 7.3.7 Calculation 116
- 7.3.8 Statistics 118
- 7.3.9 Reports 118
- 7.4 pH calibration (CAL) 120
- 7.4.2 Buffers 122
- 7.4.3 Reports 123
- 8 Operation and maintenance 124
- 9 Troubleshooting 125
- 9.2 Miscellaneous 126
- 10 Appendix 127
- 10.2 Stirring rate 128
- 10.3 Balance 128
- 10.4 USB devices 129
- 10.4.3 PC mouse 130
- 10.5 System initialization 131
- 10.6 Remote interface 132
- Titration mode DET/MET 134
- Titration mode SET 134
- Figure 24 134
- Remote status diagram SET 134
- 11 Technical specifications 140
- 11.1.3 Temperature 141
- 11.2 Dosing drive 142
- 11.3 Interfaces 142
- 11.4 Mains connection 142
- 11.5 Safety specifications 142
- 11.7 Ambient temperature 143
- 11.8 Reference conditions 144
- 11.9 Dimensions 144
- 12 Warranty (Guarantee) 145
- 13 Accessories 147
- 13.2 Optional accessories 148
- 13.2 Optional accessories 150
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