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GREISINGER GMH 3830 User Manual

GREISINGER GMH 3830
18 pages
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H60.0.11.6C-16
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
as of version 2.1 Operating Manual GMH 3830
Resistive material moisture and
temperature measuring Instrument
keep for future reference
WEEE-Reg.-Nr. DE 93889386
GMH 38 Series
Materialfeuchte / material moisture

Table of Contents

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GREISINGER GMH 3830 Specifications

General IconGeneral
Device NameGREISINGER GMH 3830
CategoryMeasuring Instruments
Resolution Temperature0.1 °C
Measurement Range Humidity0 to 100 %RH
Resolution Humidity0.1 %RH
Measurement Range Air Pressure300 to 1100 hPa
DisplayLCD
Operating Temperature-20 to +60 °C
Power Supply9V battery
Accuracy Temperature±0.3 °C
Accuracy Humidity±3 % RH (10 ... 90 % RH)
Resolution Air Pressure0.1 hPa
Operating Conditions0 to 95 %RH non-condensing
TypeDigital Thermo-Hygrometer with Barometer
Accuracy Air Pressure±1.5 hPa (at +20 °C)
Storage Temperature-25 ... +70 °C

Summary

General Advice

Intended Use

Device is for measuring material moisture and temperature using electrodes.

Safety Signs and Symbols

Explains warning notices and symbols used in the manual.

Safety Instructions

Provides crucial safety advice for operating the device safely and correctly.

Product Description

Scope of Delivery

Lists items included in the GMH 3850 package.

Operating and Maintenance

Covers battery operation, mains operation, and general device care.

Start Up and Readiness for Operation

Describes the initial self-test and readiness procedure after switching on.

Connections

Display Elements

Details the main and auxiliary displays and special display elements.

Pushbuttons

Explains the function of each key on the device.

Device Configuration

Basics of Precision Material Moisture Measuring

Moisture Content u and Wet-Basis Moisture Content w

Explains the two units for moisture content: dry basis (u) and wet basis (w).

Special Features of the Device

Highlights features like stored material data, wide measuring range, and moisture evaluation.

Auto-Hold Function

Describes how the auto-hold function stabilizes readings and freezes the value.

Automatic Temperature-Compensation (Atc)

Explains the importance of ATC and how it uses internal or external temperature probes.

Measuring In Wood

Measuring With Two Measuring-Needles

Explains the process of measuring wood using impact electrodes.

'Hard' Materials (concrete or similar)

Details how to measure hard materials using brush-type probes.

'Soft' Materials (polystyrene or similar)

Explains measuring soft materials with measuring-rods or pins.

Measuring Bulk Cargo, Bales and Other Special Measures

Covers measuring bulk cargo, bales, and other special materials.

Measuring Materials Without Characteristic Curves

Hints for Special Functions

Moisture Evaluation ('WET' - 'MEDIUM' - 'DRY')

Explains the moisture evaluation display as a guidance value.

Pre-selection of Favourite Materials ('Sort')

Describes how to pre-select materials for faster and easier measurements.

Output

Interface - Base Address (Adr.)

Explains connecting the device to a PC via serial interface and setting base addresses.

Analogue Output – Scaling with DAC.0 and DAC.1

Details how to scale the analogue output voltage based on measured values.

Application in Glued Timber Construction

Fault and System Messages

Display Messages and Remedies

Lists device display messages, their meanings, and suggested remedies.

Inspection of Accuracy / Adjustment Services

Measuring Precision

Specification

Disposal Notes

Appendix A: Sorts of Wood

Appendix B: Additional Materials

Measuring of Building Materials

Lists building materials and their measurement ranges.

Measuring of Agricultural Bulk Cargo

Lists agricultural bulk cargo and measurement details.

Estimation of Additional Materials

Lists materials for estimation and their measurement numbers.

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