Metrohm 781 pH/Ion Meter Bedienungsanleitung Seite 91
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6 Methods / Parameters
780/781 pH/Ion Meter, Manual
81
type: add, sub
In general – and also in this Manual – when dealing with standard and
sample addition techniques it is
addition
which is described. It is also
possible to carry out a standard or sample
subtraction
, for example by
precipitation reactions. The appropriate type is set here.
conc.std. 1.0E-30...1.0...1.0E+30
The concentration of the standard solution used is to be entered here,
regardless of whether it is to be added during standard addition or al-
ready present for sample addition.
report: OFF, short, full, line
After the addition run you can automatically output the result in the form
of report. You can choose between the '
short' version containing all the
relevant data and the '
full' version, which also shows the measuring
curves as a graph (see Section 7.2.5). The '
line' setting supplies re-
ports with the most important data in the same form as in the measur-
ing point reports for direct measurements.
The 'short' and 'full' reports can also be produced later under
<REPORT>
.
addition: manual, auto dos, auto
Standard or sample addition can be carried out in various ways:
manual
The standard or sample solution is added manually at defined
volume increments.
no.of additions 1, 2, 3,...19
The number of additions is entered here. If only one addition is
made then the program will adopt for the slope the existing value
from the current calibration data of the electrode used. This will
also be corrected accordingly if measuring temperature changes
in comparison to the calibration temperature. This adoption of the
existing slope also applies when a standard or sample addition
with several additions is canceled with
<MODE>
or
<QUIT>
af-
ter the first addition and then confirmed with
<ENTER>
.
However, please note that, as for the calibration of ion-selective
electrodes,
at least
two additions should be made (three to five or
even more would be better). The possibility of terminating the ad-
dition after a single standard or sample addition as described
above should only represent an absolute exception.
increment 1...n 1.0E-30...0.1...999.9 mL
The volume increment for each addition is entered here.
- 8.781.8002EN / 2014-07-31 1
- Table of contents 5
- List of illustrations 9
- 1 Introduction 11
- 1.2 Parts and controls 13
- 1.4 Safety information 16
- 2 Installation 17
- 2.3.5 Connecting a printer 23
- 2.3.6 Connecting a computer 25
- 2.5 Mains connection 27
- 2.6 Switch on 27
- 2.7 Initial configuration 28
- 3 Short operating tutorial 29
- 3.1.3 pH calibration 30
- STI RRER 32
- 781: Conc mode) 33
- 4 Operation 41
- 4.2 Operating concept 42
- 4.4 Operating principles 48
- 4.4.3 Entering text 49
- 4.4 Operating principles 50
- 5 Configuration 51
- 5.1 Report 52
- FIG/auxiliaries/device label 53
- PARAMETERS/measur 56
- 5.3 Storing measured values 57
- 5.4 Auxiliaries 58
- 5.5 Monitoring 61
- 5.6 Peripheral units 62
- 5 Configuration 63
- 5.7 RS232 settings 64
- 6 Methods / Parameters 65
- OFF' is entered with 70
- buffer 70
- OFF, ON 71
- -2200.0...0.0...2200.0 mV 71
- 6.3.2 Limits T 76
- ├ limits T 76
- : └ state 76
- FIG/report 77
- 6.4.2 Limits U 79
- ├ limits U 79
- : └ 79
- Reset cal., see Sec 82
- RAMETERS Conc/limits Conc 83
- )old(valueMeasured 85
- 6.5.6 Limits Conc 87
- ├ limits Conc 87
- CONFIG/print meas 88
- FIG/Report 93
- 7 Various functions 95
- ADD. DATA 103
- PARAMETER 105
- Conc/calculation parameters 105
- 7.2 Reports 106
- 7.2.2 Report identification 109
- CAL. DATA 111
- 7.2.6 Configuration report 113
- 7.2.7 Parameter report 114
- M ET HODS 116
- 7.3 Measured values memory 117
- CONTRAST+ 118
- CONTRAST 118
- 7.4 Limit monitoring 119
- 7.4.2 How it functions 120
- 7.5 Setup 121
- Maintenance 123
- 8.2 Messages 125
- 8.3 QM support 130
- 8.4 Validation 132
- 8.4.2 Wet tests 133
- 8.5 Diagnosis 134
- EL. T EST 136
- 8.6.2 Procedure 137
- 8.6.3 Results 139
- 8.6.4 Messages and measures 141
- 8.6 pH electrode test 144
- 9 Annex 145
- 9.1.4 Interfaces 146
- 9.1.5 Power supply 146
- 9.2 Evaluation 148
- 3-Point 149
- )blank(cclog 152
- 9.2.3 Addition method 153
- 9.3 Menu structures 154
- Pt1000 155
- NTC ┬ R(25 °C) 155
- ON ┬ time interval 155
- ON ─ next service 155
- 9.3 Menu structures 156
- ─ ON ── reference 157
- ───┬ min.conc 158
- 9 Annex 159
- 9.4 Stored buffer series 160
- 9.4 Stored buffer series 162
- 9.5 Remote box 166
- 9.6 Accessories 168
- 9.7 Warranty (guarantee) 170
- 9.7 Warranty (guarantee) 172
- 10 Index 173
- 10 Index 175
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