H60.0.12.6C-13 Resistive material moisture and temperature measuring instrument with data logger and programmable user curves as of version 2.1 Operating Manual GMH 3851 GMH 38 Series Materialfeuchte / material moisture 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.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 2 of 22 _____________________________________________________________________________ Index 1 2 GENERAL ADVICE.................................................................................................................................................. 3 INTENDED USE ........................................................................................................................................
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 3 of 22 _____________________________________________________________________________ 1 General advice Read through this document attentively and make yourself familiar to the operation of the device before you use it. Keep this document in a ready-to-hand way in order to be able to look up in the case of doubt. 2 Intended use The device is suitable for the measurement of moisture content and temperature.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 4 of 22 _____________________________________________________________________________ 3 Product description 3.1 Scope of delivery GMH 3851 9V battery type IEC 6F22 Operating Manual 3.2 Operating and Maintenance 1. Battery Operation The battery has been used up and needs to be replaced, if “bAt“ is shown in lower display. The device will, however, continue operating correctly for a certain time.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ 3.4 Connections 1. 2. 3. 4. 3.5 Page 5 of 22 _____________________________________________________________________________ Output: Operation as interface: Connect to optically isolated interface adapter (accessory: GRS 3100, GRS3105 or USB3100) Operation as analogue output: Connection via suitable cable. Attention: The output mode has to be configured (p.r.t 2.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 6 of 22 _____________________________________________________________________________ 4 Device Configuration Some menu items will be shown depending on the actual device configuration (e.g. there are some items disabled when the logger contains data). Please note the hints by the menu items.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 7 of 22 _____________________________________________________________________________ 5 Some basics of precision material moisture measuring 5.1 Moisture Content u and Wet-Basis Moisture Content w Depending on the Application one of the two units is necessary. Carpenters, joiners and the like commonly use the moisture content u (sometimes referred to as MC). When evaluating firewood, wood chips etc.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ 5.5 Page 8 of 22 _____________________________________________________________________________ Measuring In Wood: Measuring With Two Measuring-Needles Normally wood is measured with measuring-needles. Used electrodes: impact-electrode GSE91 or GSG91, reciprocating piston electrode GHE91.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 9 of 22 _____________________________________________________________________________ 5.6.3 Measuring Split the log: Use an suitable axe for splitting. Fast working splitting machines can produce heat which may falsify the measuring. Preparation of core temperature measuring of log: Drive in the impact electrode, put temperature probe into the generated hole.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ 5.7 Page 10 of 22 _____________________________________________________________________________ Measuring Other Materials ‘Hard‘ Materials (concrete or similar): Measuring with brush-type probes (GBSL91 or GBSK91) Drill two holes with Ø6mm (GBSK91) or Ø 8mm (GBSL91) at intervals of 8 to 10cm into the material to be measured.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 11 of 22 _____________________________________________________________________________ 6 Hints for special functions 6.1 Moisture evaluation ('WET' - 'MEDIUM' - 'DRY') Additionally to the measuring value, an individual moisture evaluation will be displayed simultaneously. This moisture evaluation is only a guidance value, the final evaluation is depending on the application of the material e.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 12 of 22 _____________________________________________________________________________ 7 Operation of Logger The device supports two different logger functions: „Func-Stor“: „Func-CYCL“: each time when „store“ (key 6) is pressed a measurement will be recorded.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ 7.2 Page 13 of 22 _____________________________________________________________________________ „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.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 14 of 22 _____________________________________________________________________________ 8 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. 8.1 Interface - Base Address ('Adr.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 15 of 22 _____________________________________________________________________________ 10 Fault and System Messages Display Meaning Remedy Blinking curve display: Displayed value is out of specified range (Wood: 8..
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 16 of 22 _____________________________________________________________________________ 13 Specification Measuring Principle Channel1 Channel2 Resistive material-moisture-measuring Temperature-measuring thermocouple type K matching DIN EN 13183-2: 2002 or internal temperature-measuring Char.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 17 of 22 _____________________________________________________________________________ 15 Appendix A: Sorts of wood Select kind of wood you want to measure, enter number on the device, e.g. birch = h. 60 Identification Number Comment Group A h. A Wood-group A (equal to GHH91 selector “A”) Group B h. B Wood-group B (equal to GHH91 selector “B”) Group C h.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Bollywood Bossime Box Grey Box Grey Coast Box, Black Box, Brush (Location Unknown) h.67 h.70 Eucalyptus moluccana h.75 Eucalyptus bosistoana h.76 Eucalyptus lafgiflorens h.71 Litsea reticulata 5..100% Cypress, White Drypetes spp, 7..78% Dakua, Salusalu (Fiji) Lophostemon confertus Lophostemon Box, Brush (N.S.W.
H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Hemlock, Chinesische Hevea Hickory Hollywood, Yellow Horizontal Incensewood Iroko Ironbark, Ironbark, Ironbark, h.173 h.174 Carya spp. h.175 Premna lignum-vitae h.176 Tsuga chinensis 5..98% Hevea Brasiliensis 7..
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H60.0.12.6C-13 Operating Manual GMH 3851 _____________________________________________________ Page 22 of 22 _____________________________________________________________________________ 16 Appendix B: Additional materials Select material you want to measure, enter number on the device, e.g. concrete b25 = b. 6 16.
17.03.2006, BR Moisture Conversions Seite 1 Units of moisture measurings and their conversions Established moisture measuring instruments (like GMH3830 before V1.4) are displaying the material moisture relative to the dry weight of a material. In practice other units are used, too, especially the wet basis moisture content. The display of newer instruments (like GMH3830 V1.4 or GMR100) can be switched to both units.
17.03.2006, BR Moisture Conversions Seite 2 rarely used: Dry-Content The unit is % again. dry content[%] = weightdry / weightwet *100 Conversion meter display u -> dry content dry content[%] = 10000 / ( 100 + Moisture content u[%]) Examples: 1kg of wet wood, which contains 500g of water has a moisture content u of 50% 1kg of wet wood, which contains 200g of water has a moisture content u of 80% GREISINGER electronic GmbH Hans-Sachs-Straße 26 D-93128 Regenstauf Tel.
H60.0.71.6C-04 Operating Manual Appendix Moisture measuring set for agricultural applications as of version 2.1 GMH 38-LW1 / -LW2 WEEE-Reg.-Nr. DE 93889386 GMH Messtechnik GmbH • Standort Greisinger Hans-Sachs-Straße 26 • D-93128 Regenstauf +49 (0) 9402 / 9383-0 +49 (0) 9402 / 9383-33 info@greisinger.
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 _____________________________________________________ page 2 of 8 _____________________________________________________________________________ 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.
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 _____________________________________________________ 4 page 3 of 8 _____________________________________________________________________________ Product Description 4.1 Scope of supply The scope of supply of the GMH 38-LW Sets includes: measuring probe GSF 50 TFK or GSF 50 TF Display instrument of GMH 38 series with 9V battery and operating manual Operating manual appendix GMH 38-LW1/-LW2 4.
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 _____________________________________________________ page 4 of 8 _____________________________________________________________________________ 6 Handling 6.1 Start of operation Switch the device on with the on/off key. After segment test the device is ready for measuring. 6.2 Selection of the characteristic curve Selection of characteristic curve: by pressing the characteristic curve can be selected.
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 _____________________________________________________ page 5 of 8 _____________________________________________________________________________ 9 Measuring of grain For the storability, their quality assessment and purpose, the 38-LW Set is an important support of decision – beside the decision of smell (fusty?) – Consistence (dust…) and appearance (colour, impurities).
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 _____________________________________________________ page 6 of 8 _____________________________________________________________________________ 10.2 Bucket test The probes from suitable places in Your material into a bucket ( (>=10 litre). Compress: Step into the bucket and compress with roughly 10 kg.
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 _____________________________________________________ page 7 of 8 _____________________________________________________________________________ Accuracy Wood pellets Pellet measuring is similar (also h.461), but the specified range ends already at 20 % u. Keep probe clean! Especially when measuring in wet hay, the probe may be soiled very strong, this may produce to low measuring displays.
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