ELMETRON CX-401, User Manual, Page: 5 / 120

CONTENTS
I. Introduction 1
1.Exploitation notices 3
2.Characteristics of the meter 4
3.What is the meter designed for 6
4.The outside view 7
5.Switching the meter on and off 10
6.Preparation to work 11
6.1.Choosing the kind of the temperature compensation 11
6.2.Changing the measurement resolution 12
6.3.Switchnig the stabilised reading signalisation on and off 13
6.4.Changing the electrode number 14
6.5.Readout of the last calibration date 15
6.6.Setting the time of calibration validity 16
6.7.Defining the button functions 17
6.8.Holding the reading on the display 18
II. pH measurement 19
7.Preparation of the pH electrode 21
8.Calibration 22
8.1.Calibration with use of standard and buffer solutions 23
8.2.Entering the buffers’ values into the meter’s memory 24
8.3.Calibration in buffer solutions 26
8.4.Calibration with use of NIST compliant standard solutions 28
8.5.Calibration with manual temperature compensation 30
9.Checking the electrode condition 31
9.1.Readout of the electrode parameters after calibration 32
10. pH measurement 34
11. Notices about the temperature compensation and interpretation
of the pH measurement results 36
III. Conductivity and salinity measurement 39
12. Basic information about the conductivity measurement 41
13. Entering the conductivity measurement parameters 42
13.1. Choosing the unit 42
13.2. Entering the W
TDS
coefficient 44
13.3. Choosing the type of the temperature compensation 45
13.4. Entering the
α
coefficient value 46
13.5. Entering the reference temperature value 47
14. Maintenance of the conductivity cell 48
15. Calibration 49
15.1. Calibration without standard solution 49
15.2. Calibration with use of standard solutions 50
16. Conductivity measurement 55
16.1. Measurement without the temperature compensation 55
16.2. Measurement with automatic temperature compensation 56
16.3. Measurement with manual temperature compensation 57
17. Salinity and total dissolved solids measurement 58
17.1. Salinity measurement with conversion to NaCl or KCl 59
17.2. Determining the W
TDS
coefficient 60