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H74.0.05.6C-06
Oxygen meter for dissolved oxygen
with integrated temperature and pressure measuring
GMH 3651
Operating Manual
As of Version 1.0
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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Table of Contents
Related Manuals for GREISINGER GMH 3651
Summary of Contents for GREISINGER GMH 3651
- Page 1 GMH 3651 Operating Manual As of Version 1.0 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
H74.0.05.6C-06 Operating Manual GMH 3651 page 2 of 18 Contents GENERAL NOTE ..............................2 DESIGNATED USE ..............................3 SAFETY ..................................3 ..........................3 AFETY SIGNS AND SYMBOLS .............................. 3 AFETY GUIDELINES PRODUCT DESCRIPTION ............................4 ..............................4 COPE OF SUPPLY ...................... -
Page 3: Designated Use
3 of 18 2 Designated Use The GMH 3651 is measuring dissolved oxygen in Water. The measuring is performed by means of a suitable oxygen sensor (included in supply in standard instrument) connected to the Mini-DIN socket, the sensor measures at the membrane at the tip of the sensor. -
Page 4: Product Description
H74.0.05.6C-06 Operating Manual GMH 3651 page 4 of 18 4 Product Description 4.1 Scope of supply The scope of supply includes: GMH 3651 with 9V-battery Oxygen sensor GWO 3600 Operating Manual 4.2 Operation and maintenance advice 1. Battery operation and ‘bAt’ are shown in the lower display the battery has been used up and needs to be replaced. -
Page 5: Connections
H74.0.05.6C-06 Operating Manual GMH 3651 page 5 of 18 4.4 Connections Output: Operation as interface for t he connection of galvanically isolated adapters (accessories: GRS 3100, USB 3100) Operation as analogue output: connection via suitable analogue cable Attention: The mode of operation has to be configured (p.r.t Chapter 5) and influences... -
Page 6: Pop-Up Clip
H74.0.05.6C-06 Operating Manual GMH 3651 page 6 of 18 4.7 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. Pop-up clip closed Pop-up clip at position 90°... -
Page 7: Configuration
H74.0.05.6C-06 Operating Manual GMH 3651 page 7 of 18 5 Configuration Some menu points depend on current device settings. To change device settings, press „Menu“ Store for 2 seconds. This will activate the configuration menu (main Menu Quit Store display: “Set”). Pressing „Menu“... - Page 8 H74.0.05.6C-06 Operating Manual GMH 3651 page 8 of 18 [ONC DA.,N Analogue output is showing concentration in mg/l or in ppm SAT or P 02 Analogue output is showing partial pressure in %, hPa or mmHg ( (H 2) DA[.0 0.0...100.0...
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Page 9: The Oxygen Sensor
H74.0.05.6C-06 Operating Manual GMH 3651 page 9 of 18 6 The Oxygen Sensor 6.1 Design of Sensor GWO 3600 The oxygen electrode is an active electrode consisting of a silver cathode and a lead anode with the electrolyte being potassium hydroxide (KOH). In case of oxygen being present it will be reduced at the silver cathode, i.e. -
Page 10: Oxygen Measuring - Please Note
H74.0.05.6C-06 Operating Manual GMH 3651 page 10 of 18 8. Check cathode for air bubbles. If there are large air bubbles, remove diaphragm head again and repeat process as of point 5. If O-ring has been damaged, it has to be replaced. -
Page 11: Calibration Of The Sensor
H74.0.05.6C-06 Operating Manual GMH 3651 page 11 of 18 8 Calibration of the Sensor In order to compensate for ageing of the sensor, the sensor has to be calibrated at regular intervals. The device is equipped with easy-to-use calibration functions: Standard 1-point calibration, sufficient for the most applications and special 2 or 3-point calibration, if high accuracy is needed in extreme measuring. -
Page 12: 3-Point Calibration
H74.0.05.6C-06 Operating Manual GMH 3651 page 12 of 18 8.2 2 / 3-Point Calibration ('(AL 2-PT, (AL 3-PT') The sensor will be automatically calibrated to the oxygen content of the atmosphere (20.95%) and one or two additional concentrations. The calibration can be performed in gases ([AL A,R: Air, 100% Oxygen and/ or 0% oxygen like nitrogen) or in saturated water solutions ([AL AQUA). -
Page 13: Operation Of The Logger
H74.0.05.6C-06 Operating Manual GMH 3651 page 13 of 18 9 Operation of the Logger The device supports two different logger functions: each time when „store“ (key 6) is pressed a measurement will be recorded. „Func-Stor“: „Func-CYCL“: measurements will automatically be recorded at each interval, which was set in the logger menu ‚CYCL‘... -
Page 14: Func-Cycl": Automatic Recording With Selectable Logger-Cycle-Time
H74.0.05.6C-06 Operating Manual GMH 3651 page 14 of 18 9.2 „Func-CYCL“: Automatic Recording With Selectable Logger-Cycle-Time The Logger-Cycle-Time is selectable (p.r.t. Configuration). For example „CYCL“ = 1:00: A measuring is recorded after each 60 seconds. Max. number of data sets:... -
Page 15: Output
H74.0.05.6C-06 Operating Manual GMH 3651 page 15 of 18 11 Output The output can be used as serial interface (for GRS3100 or GRS3105 interface adapters) or as analogue output (0-1V). If none of both is needed, we suggest to switch the output off, battery life then is extended. -
Page 16: Glp
H74.0.05.6C-06 Operating Manual GMH 3651 page 16 of 18 12 GLP GLP (Good Laboratory Practice) includes regular check of devices and accessories. For oxygen measurements it is highly important to ensure correct pH calibration. The device provides the following functions to help with this. -
Page 17: Error And System Messages
H74.0.05.6C-06 Operating Manual GMH 3651 page 17 of 18 15 Error and System Messages Display Meaning Remedy low battery voltage, device will continue to work replace battery for a short time If mains operation: wrong voltage replace power supply, if fault continues to... -
Page 18: Specification
H74.0.05.6C-06 Operating Manual GMH 3651 page 18 of 18 16 Specification Measuring ranges Oxygen concentration 0.00 ... 70.00 mg/l or ppm electrochemical sensor GWO 3600 Oxygen saturation 0.0 ... 600.0 % O (0.0 .. 427.5 mmHg)“ Oxygen partial pressure 0 ... 1200 hPa O Sensor temperature -5.0 ...
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