Metrohm 781 pH/Ion Meter Bedienungsanleitung Seite 87
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6 Methods / Parameters
780/781 pH/Ion Meter, Manual
77
configuration see Section 2.3.3, pH/Ion Meter configuration see Sec-
tion 5.6).
min.conc 1.0E-30...0.1...1.0E+30
max.conc. 1.0E-30...1.0...1.0E+30
The standard concentrations to be calculated lie within the range of
these minimum and maximum concentrations. Depending on the re-
quired number of standards (see above), the pH/Ion Meter will calculate
the other concentrations. The expected resulting potential difference
between all the standards remains constant.
V init 0.001...100.0...999.9 mL
The initial volume of a presentation (e.g. buffer, TISAB, etc.) is entered
here.
no.of Exchange Units. 1...5
It is normally a good idea to calibrate ion-selective electrodes over sev-
eral concentration decades. It is possible that a single Dosimat ex-
change unit may not be sufficient for this. In this case you can prepare
several exchange units with the corresponding different concentrations
of standard solutions:
conc.1...n 1.0E-30...100.0...1.0E+30
V Exchange Unit 1...n: 1, 5, 10, 20, 50 mL
For each exchange unit you must enter the concentration of the solution
it contains and the volume of the dosing cylinder. Arrange the exchange
units with increasing concentration of the standard solutions.
Please make sure that all exchange units have been prepared before
the start of a calibration sequence (dosing cylinders freshly filled, air
bubbles removed, etc.). The request for changing the exchange unit is
given on the display. This message describes the required standard
concentration and volume increment at the Dosimat Plus.
fill dosimat, dV/dt max.
dV = 1 ul, c = 2000.0 ppm
After mounting and filling the prepared exchange unit, continue with
<ENTER>
.
6.5.6 Limits Conc
(applies only to measurement type: direct)
PARAMETER Conc
:
├ limits Conc
: └
state
In the direct measuring modes the pH/Ion Meter has a limits function
which allows the control of the parameter to be monitored. The control
signals are transmitted via the MSB connection to the optional remote
- 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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