Metrohm 767 Calibrated Reference - Manual (Page 3)

Contents
767 Calibrated Reference Instructions for Use
I
Table of contents
1 Overview ............................................................... 1
1.1 Introduction ....................................................................................................1
1.2 Functional description ...................................................................................2
2 General instrument handling............................... 4
2.1 Storage ...........................................................................................................4
2.2 Maintenance ...................................................................................................4
2.3 Calibration ......................................................................................................4
2.4 ‘High-Impedance’, an important basic term’ ................................................4
2.5 Measurement of the insulation resistance ...................................................5
3 Procedure for checking instruments .................. 6
3.1 Basics .............................................................................................................6
3.2 pH Meters and Titrators.................................................................................6
3.2.1 U/mV, pH ..................................................................................................7
3.2.2 Polarization current and voltage source ..................................................8
3.2.3 Temperature (Pt 100/Pt 1000)..................................................................8
3.2.4 Tolerances ................................................................................................9
3.3 Conductivity meters.......................................................................................9
3.3.1 Conductance............................................................................................9
3.3.2 Temperature ...........................................................................................10
3.3.3 Tolerances ..............................................................................................10
3.4 Rancimat 617 and 679 ................................................................................ 10
4 Checking by means of the diagnosis
instructions ........................................................ 12
5 Appendix ............................................................. 13
5.1 Technical specifications ............................................................................. 13
5.1.1 Measuring source...................................................................................13
5.1.2 Temperature coefficient .........................................................................13
5.1.3
5.1.4 Ambient temperature..............................................................................14
5.1.5 Safety specifications ..............................................................................14
5.1.6 Electricity supply.....................................................................................14
5.1.7 Dimensions.............................................................................................14
5.2 Cables for connecting 767 – instrument X ................................................ 14
5.3 Standard equipment ................................................................................... 15
5.4 Warranty and conformity ............................................................................ 16
5.4.1 Warranty..................................................................................................16
5.4.2 Declaration of Conformity ......................................................................17
5.4.3 Quality Management Principles .............................................................18
6 Index ................................................................... 19
Longterm stability (2 years)....................................................................13