
Channel Calibration
- 22 -
MXD70 Conductivity Setup and
Operating Guide
Channel Cal
ibration
Calibration by Comparison with Another Instrument
This can provide the easiest method for in-situ calibrations but has the disadvantage of only being able
to check a single measurement point. LTH recommends this method for ALL pure water (<10 μS/cm)
calibration checks and has developed a portable system specifically for this purpose. As
measurements are made by comparison of the readings taken in the same solution, temperature
effects are less critical. However, it is essential that settings for temperature compensation are the
same on both instruments. For more information on the measurement of pure water refer to
Appendix A - Ultra Pure Water (page 33).
Calibration of the Cell Constant
LTH conductivity cells are supplied with a nominal cell constant value, e.g 0.1, 1.0. The actual cell
constant could be up to ±2% from this value. It is possible for LTH to measure the actual cell constant
of each cell and provide traceable certification. The user can then program this value into the
instrument eliminating the errors contributed by manufacturing variations in the cell geometry. Use
the cell constant menu in the channel setup menu to enter the specified cell constant.
Table of calibration resistance values
Conductivity
Display
Reading
Nominal cell
constant
K=0.01
Nominal cell
constant
K=0.10
Nominal cell
constant
K=1.00
Nominal cell
constant
K=10.0
Resistivity
Display
reading
0.050 μS/cm
200K
20.00 M
-cm
0.100 μS/cm
100K
10.00 M
-cm
0.200 μS/cm
50K
5.000 M
-cm
0.500 μS/cm
20K
2.000 M
-cm
1.000 μS/cm
10K
100K
1.000 M
-cm
2.000 μS/cm
5K
50K
500.0 K
-cm
5.000 μS/cm
2K
20K
200.0 K
-cm
10.00 μS/cm
1K
10K
100K
100.0 K
-cm
20.00 μS/cm
500R
5K
50K
50.00 K
-cm
50.00 μS/cm
200R
2K
20K
20.00 K
-cm
100.0 μS/cm
100R
1K
10K
100K
10.00 K
-cm
200.0 μS/cm
500R
5K
50K
500.0 μS/cm
200R
2K
20K
1000 μS/cm
100R
1K
10K
2.000 mS/cm
500R
5K
5.000 mS/cm
200R
2K
10.00 mS/cm
100R
1K
20.00 mS/cm
50R
500R
50.00 mS/cm
20R
200R
100.0 mS/cm
10R
100R
200.0
mS/cm
50R
500.0
mS/cm
20R
1000
mS/cm
10R
This list of calibration resistance values will allow the user to check or modify the calibration of the
instrument. Temperature compensation
MUST
be turned off during the test or adjustment.
Summary of Contents for MXD70 Series
Page 6: ...MXD73 Multi parameter Monitor Installation Guide ...
Page 7: ......
Page 10: ...Preface MXD73 Installation Guide 3 Declaration of Conformity ...
Page 11: ...Preface 4 MXD73 Installation Guide Blank ...
Page 13: ...Contents 6 MXD73 Installation Guide Blank ...
Page 15: ...Introduction 8 MXD73 Installation Guide Introduction MXD73 Rear Termination Overview ...
Page 25: ...Installation 18 MXD73 Installation Guide Installation Blank ...
Page 33: ...Notes 26 MXD73 Installation Guide ...
Page 34: ......
Page 36: ...MXD75 Multi parameter Monitor Installation Guide ...
Page 37: ......
Page 40: ...Preface MXD75 Installation Guide 3 Declaration of Conformity ...
Page 41: ...Preface 4 MXD75 Installation Guide Blank ...
Page 43: ...Contents 6 MXD75 Installation Guide Blank ...
Page 45: ...Introduction 8 MXD75 Installation Guide Introduction MXD75 Termination Overview ...
Page 58: ...Installation MXD75 Installation Guide 21 Installation Horizontal Mounting Vertical Mounting ...
Page 59: ...Installation 22 MXD75 Installation Guide Installation Blank ...
Page 67: ...Notes 30 MXD75 Installation Guide ...
Page 68: ...Notes MXD75 Installation Guide 31 ...
Page 70: ......
Page 72: ...MXD70 SERIES Multi parameter Monitor User Interface Data Logging Guide ...
Page 73: ......
Page 77: ...Contents 4 User Interface Guide Blank Page ...
Page 81: ...User Interface 8 User Interface Guide User Interface Blank Page ...
Page 85: ...Security Code Access 12 User Interface Guide Security Code Access Blank Page ...
Page 93: ...Update Software 20 User Interface Guide Update Software Blank Page ...
Page 107: ...Data Logging 34 User Interface Guide Data Logging Blank Page ...
Page 109: ...Error Messages 36 User Interface Guide Error Messages Blank Page ...
Page 116: ......
Page 117: ......
Page 118: ...MXD70 SERIES Multi parameter Monitor Conductivity Setup and Operating Guide ...
Page 119: ......
Page 123: ...Contents 4 MXD70 Conductivity Setup and Operating Guide Blank ...
Page 133: ...Installation 14 MXD70 Conductivity Setup and Operating Guide Installation Blank ...
Page 149: ...Channel Calibration 30 MXD70 Conductivity Setup and Operating Guide Channel Calibration Blank ...
Page 155: ...Appendix 36 MXD70 Conductivity Setup and Operating Guide Appendix ...
Page 177: ...Notes 58 MXD70 Conductivity Setup and Operating Guide ...
Page 178: ...Notes MXD70 Conductivity Setup and Operating Guide 59 ...
Page 180: ......
Page 181: ......
Page 182: ...MXD70 SERIES Multi parameter Monitor pH Redox Setup and Operating Guide ...
Page 183: ......
Page 211: ...Channel Setup 28 MXD70 pH Redox Setup and Operating Guide Channel Setup Blank ...
Page 251: ...Notes 68 MXD70 pH Redox Setup and Operating Guide ...
Page 252: ...Notes MXD70 pH Redox Setup and Operating Guide 69 ...
Page 254: ......
Page 256: ...MXD70 SERIES Multi parameter Monitor Electrodeless Conductivity Setup and Operating Guide ...
Page 257: ......
Page 261: ...Contents 4 MXD70 Electrodeless Conductivity Setup and Operating Guide Blank ...
Page 295: ......
Page 311: ...Notes 54 MXD70 Electrodeless Conductivity Setup and Operating Guide ...
Page 313: ......
Page 314: ......
Page 315: ...MXD70 SERIES Multi parameter Monitor Dissolved Oxygen Setup and Operating Guide ...
Page 316: ......
Page 320: ...Contents 4 MXD70 Dissolved Oxygen Setup and Operating Guide Blank ...
Page 322: ...Specification 6 MXD70 Dissolved Oxygen Setup and Operating Guide Specification Blank ...
Page 339: ...Channel Setup MXD70 Dissolved Oxygen Setup and Operating Guide 23 Channel Setup Blank ...
Page 353: ...Channel Calibration MXD70 Dissolved Oxygen Setup and Operating Guide 37 Channel Calibration ...
Page 359: ...Appendix MXD70 Dissolved Oxygen Setup and Operating Guide 43 Appendix Blank ...
Page 381: ...Notes MXD70 Dissolved Oxygen Setup and Operating Guide 65 ...
Page 382: ...Notes 66 MXD70 Dissolved Oxygen Setup and Operating Guide ...
Page 384: ......
Page 385: ......
Page 386: ...MXD70 SERIES Multi parameter Monitor Auxiliary mA Input Setup and Operating Guide ...
Page 387: ......
Page 391: ...Contents 4 MXD70 Auxiliary mA Input Setup and Operating Guide Blank ...
Page 393: ...Specification 6 MXD70 Auxiliary mA Input Setup and Operating Guide Specification Blank ...
Page 405: ...Channel Setup 18 MXD70 Auxiliary mA Input Setup and Operating Guide Channel Setup BLANK ...
Page 434: ...Notes MXD70 Auxiliary mA Input Setup and Operating Guide 47 ...
Page 436: ......
Page 437: ......
Page 438: ...MXD70 SERIES Multi parameter Monitor Suspended Solids Turbidity Setup and Operating Guide ...
Page 439: ......
Page 443: ...Contents 4 MXD70 Suspended Solids Turbidity Setup and Operating Guide Blank ...
Page 465: ...Appendix 26 MXD70 Suspended Solids Turbidity Setup and Operating Guide Appendix Blank ...
Page 486: ...Notes MXD70 Suspended Solids Turbidity Setup and Operating Guide 47 ...
Page 488: ......
Page 489: ......
Page 491: ......
Page 495: ...Contents 4 MXD70 Setpoints Current Outputs and Digital Inputs Configuration Guide Blank ...
Page 511: ...Setpoints 20 MXD70 Setpoints Current Outputs and Digital Inputs Configuration Guide Setpoints ...
Page 525: ...Notes 34 MXD70 Setpoints Current Outputs and Digital Inputs Configuration Guide ...
Page 526: ...Notes MXD70 Setpoints Current Outputs and Digital Inputs Configuration Guide 35 ...
Page 528: ......
Page 529: ......
Page 530: ...MXD70 Series Multi parameter Monitor Modbus RS485 Interface Operating Guide ...
Page 531: ......
Page 535: ...Contents 4 Modbus RS485 Interface Operating Guide BLANK ...
Page 539: ...Modbus RS485 8 Modbus RS485 Interface Operating Guide Modbus RS485 BLANK ...
Page 628: ...Notes Modbus RS485 Interface Operating Guide 97 ...
Page 629: ...Notes 98 Modbus RS485 Interface Operating Guide ...
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