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H72.0.11.6C-04
as of version 1.3
Please carefully read these instructions before use!
Please consider the safety instructions!
Please keep for future reference!
GHM Messtechnik GmbH • Standort Greisinger
Hans-Sachs-Str. 26 • D-93128 Regenstauf
+49 (0) 9402 / 9383-0
Conductivity measuring device
GMH 3451
+49 (0) 9402 / 9383-33
Operating manual
with data logger
WEEE-Reg.-Nr. DE 93889386
info@greisinger.de
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Table of Contents
Related Manuals for GREISINGER GMH 3451
Summary of Contents for GREISINGER GMH 3451
- Page 1 Please carefully read these instructions before use! Please consider the safety instructions! Please keep for future reference! WEEE-Reg.-Nr. DE 93889386 GHM Messtechnik GmbH • Standort Greisinger Hans-Sachs-Str. 26 • D-93128 Regenstauf +49 (0) 9402 / 9383-0 +49 (0) 9402 / 9383-33 info@greisinger.de...
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Page 2: Table Of Contents
H72.0.11.6C-04 Operating Manual GMH 3451 page 2 of 18 _____________________________________________________ _____________________________________________________________________________ Index 1 GENERAL NOTE ..............................3 2 SAFETY ..................................3 2.1 ..............................3 NTENDED 2.2 ..........................3 AFETY SIGNS AND SYMBOLS 2.3 .............................. 3 AFETY GUIDELINES 3 PRODUCT SPECIFICATION ..........................4 ... -
Page 3: General Note
H72.0.11.6C-04 Operating Manual GMH 3451 page 3 of 18 _____________________________________________________ _____________________________________________________________________________ 1 General Note Read this document carefully and get used to the operation of the device before you use it. Keep this document within easy reach near the device for consulting in case of doubt. -
Page 4: Product Specification
H72.0.11.6C-04 Operating Manual GMH 3451 page 4 of 18 _____________________________________________________ _____________________________________________________________________________ This device must not be run with a defective or damaged power supply unit. Danger to life due to electrical shock! Do not use these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury or material damage. -
Page 5: Handling
H72.0.11.6C-04 Operating Manual GMH 3451 page 5 of 18 _____________________________________________________ _____________________________________________________________________________ 4 Handling 4.1 Display elements conductivity (mS/cm, µS/cm) Main display: resistivity (kΩcm) TDS / total dissolved solids (mg/l) salinity (SAL) mg/l kOhm Secondary display: measuring value temperature 3 Arrows to selected measuring unit Warning signal: indicates low battery or missing °C... -
Page 6: Pop-Up Clip
H72.0.11.6C-04 Operating Manual GMH 3451 page 6 of 18 _____________________________________________________ _____________________________________________________________________________ 4.4 Pop-up clip Handling: Pull at label “open” in order to swing open the pop-up clip. ‐ Pull at label “open” again to swing open the pop-up clip further. -
Page 7: Principles Of The Measurements
H72.0.11.6C-04 Operating Manual GMH 3451 page 7 of 18 _____________________________________________________ _____________________________________________________________________________ 6 Principles of the measurements 6.1 Basics about conductivity : The ability of a material to conduct electric current: γ Definition of conductivity • length of the material... -
Page 8: Electrodes / Measuring Cells
H72.0.11.6C-04 Operating Manual GMH 3451 page 8 of 18 _____________________________________________________ _____________________________________________________________________________ The salt composition of the different seas is not the identical. Depending on place, weather, tides, etc. there may be considerable divergences to the 35 ‰ according to IOT. -
Page 9: Configuration
H72.0.11.6C-04 Operating Manual GMH 3451 page 9 of 18 _____________________________________________________ _____________________________________________________________________________ 7 Configuration Some menu points depend on current device settings (e.g. some points are locked if logger memory contains data sets). To change device’s settings, press for 2 seconds. This will activate the configuration menu „Menu“... - Page 10 H72.0.11.6C-04 Operating Manual GMH 3451 page 10 of 18 _____________________________________________________ _____________________________________________________________________________ Menu Parameter Value Description Reference temperature of temperature compensation (only if t.Cor = Lin or nLF) 25 °C / 77 °F Reference temperature 25 °C / 77 °F 20 °C / 68 °F Reference temperature 20 °C / 68 °F...
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Page 11: Data Logger
H72.0.11.6C-04 Operating Manual GMH 3451 page 11 of 18 _____________________________________________________ _____________________________________________________________________________ If logger memory contains data sets parameters marked with (*) cannot be called. You have to clear memory to change these parameters! (**) If logger is running parameters marked with (**) cannot be called. -
Page 12: Automatic Recording With Selectable Cycle Time "Func Cycl
H72.0.11.6C-04 Operating Manual GMH 3451 page 12 of 18 _____________________________________________________ _____________________________________________________________________________ c) Clear manual recordings: If data sets have been stored, they can be deleted with the “store” key: Press “store” for 2 seconds: Call menu “Clear” Select with: Clear nothing (cancel) -
Page 13: Universal Output
H72.0.11.6C-04 Operating Manual GMH 3451 page 13 of 18 _____________________________________________________ _____________________________________________________________________________ 9 Universal output The output can be used as serial interface (for USB 3100, USB 3100 N, GRS 3100 or GRS 3105 interface adapters) or as analogue output (0-1V). -
Page 14: Analogue Output
H72.0.11.6C-04 Operating Manual GMH 3451 page 14 of 18 _____________________________________________________ _____________________________________________________________________________ 9.2 Analogue Output An analogue voltage 0-1V can be tapped at the universal output socket (mode: “Out dAC”). With the DAC.0 and DAC.1 values the output can be rapidly scaled to your efforts. -
Page 15: Glp
H72.0.11.6C-04 Operating Manual GMH 3451 page 15 of 18 _____________________________________________________ _____________________________________________________________________________ Error messages of automatic adjustment/calibration: Determined cell correction must not exceed 1.2 CAL Err.1 Cell correction too high CAL Err.2 Determined cell correction must not fall below 0.8 Cell correction too small CAL Err.3... -
Page 16: Real Time Clock ("Cloc")
H72.0.11.6C-04 Operating Manual GMH 3451 page 16 of 18 _____________________________________________________ _____________________________________________________________________________ 14 Real Time Clock (“CLOC”) The real time clock is used for chronological assignment of the logger data and calibration points. Please check the settings when necessary. 15 Accuracy Check / Adjustment Service You can send the device to the manufacturer for adjustment and inspection. -
Page 17: Reshipment And Disposal
H72.0.11.6C-04 Operating Manual GMH 3451 page 17 of 18 _____________________________________________________ _____________________________________________________________________________ 17 Reshipment and Disposal 17.1 Reshipment All devices returned to the manufacturer have to be free of any residual of measuring media and other hazardous substances. Measuring residuals at housing or sensor may be a risk for persons or environment Use an adequate transport package for reshipment, especially for fully functional devices. -
Page 18: Operating Manual Gmh 3451
H72.0.11.6C-04 Operating Manual GMH 3451 page 18 of 18 _____________________________________________________ _____________________________________________________________________________ 18 Specification Measuring Anzahl ranges Conductivity 1 *) 0,0 ... 200,0 µS/cm ” 2 *) 0 ... 2000 µS/cm ” 3 *) 0,00 ... 20,00 mS/cm ” 4 *) 0,0 ...
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