TRAMEX MRH III User Manual
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TRAMEX MRH III User Manual

Non-destructive moisture & humidity meter
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Non-Destructive Moisture
4.2843
MRH
Humidity Meter
USER GUIDE
www.calcert.com
15
10
20
5
25
0
30
III
&
MRH05 10
sales@cal

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  • Page 1 Non-Destructive Moisture & Humidity Meter USER GUIDE MRH05 10 4.2843 www.calcert.com sales@cal...
  • Page 2 MRH III User Guide TRAMEX MOISTURE/HUMIDITY INSTRUMENTS SURVEY ENCOUNTER: The intelligent moisture meter. "State of the art" non-destructive moisture meter for measurement and data logging of moisture in building materials. MOISTURE ENCOUNTER PLUS General purpose non-destructive moisture meter employing advanced analog and digital technology.

  • Page 3: Table Of Contents

    36868 Tramex MRH III Guide V6.pdPage 1 13/05/2010 16:41:19 MRH III User Guide TABLE OF CONTENTS Introduction ..............4 How it works ..............4 Instrument Features ..........Operating Instructions ..........8 Non-destructive measurement mode ....9 Wood pin meter mode ..........

  • Page 4: Introduction

    MRH III User Guide Introduction Thank you for selecting a new MRH instrument from Tramex. The MRH has 3 modes of operation: 1: The MRH utilises “state of the art” electronic technology to provide you with an accurate and easy to use non-invasive...
  • Page 5 MRH III User Guide measured by creating a low frequency alternating electric field between the electrodes as illustrated in Figure 1 below. This field penetrates the material under test. The very small alternating current flowing through the field is inversely proportional to the impedance of the material.

  • Page 6: Instrument Features

    MRH III User Guide Instrument Features Your MRH employs advanced digital technology to enable the incorporation of many features, which are listed below. 3 modes of measurement: Non-destructive moisture • measurement, hygrometer and wood pin probe. 6 simple membrane keypad controls: •...
  • Page 7 MRH III User Guide To conserve battery life, the instrument automatically • powers OFF after 10 minutes of inactivity or when the key is pressed. If a key is pressed the power off will will be extended for an additional ten minutes.

  • Page 8: Operating Instructions

    MRH III User Guide Operating Instructions Phono Socket RH Probe for Wood Socket Probes Flashing BACKLIT ‘H’ in Hold W O O D DISPLAY Mode . 5 8 0 5 . 9 % HOLD/ UP / AUDIO DOWN KEYS SCALE...

  • Page 9: Non-Destructive Measurement Mode

    MRH III User Guide Non-destructive measurement mode 1. Press the key to power up. With no RH probe or pin probe connected the last used scale will be displayed on the LCD. Press key again to power off. 2. To change scale, press key to select the wood scale or the comparative material scales.

  • Page 10: Wood Pin Meter Mode

    MRH III User Guide and 23. For SG greater than 0.80 please refer to species adjustment table (Table 2 on Page 20). 8. To turn audio tone on or off, press key twice in quick succession. 9. The MRH will automatically power-off after ten minutes if no key is pressed.
  • Page 11 Both types are calibrated using gravimetric or oven-drying test methods. The Tramex MRH combines both of the above methods in one instrument so it is important to understand how each test method works as the results from the two tests may sometimes be different and appear to be contradictory.

  • Page 12: Typical Mrh Displays

    MRH III User Guide Typical MRH Displays Moisture Measurement Mode R O O F M A S O N R Y D R Y W A L L W O O D . 6 0 1 1 . 2 %...
  • Page 13 MRH III User Guide Humidity Probe Display METRIC Flashing 'H' in Hold mode Relative Humidity T ºC 5 0 . 1 % 2 0 C 1 1 . 7 C 0 0 0 7 g m s Dewpoint (Td) ºC...

  • Page 14: Humidity Measurement Mode

    MRH III User Guide Humidity measurement mode The optional Relative Humidity (RH) Probe can be plugged into the socket at the top of the instrument. The display shows relative humidity (RH), temperature (T), dew-point temperature (Td) and mixing ratio in grains/lb (GRN) or g/kg (gms).

  • Page 15: Masonry Scale

    MRH III User Guide enter the building some distance away. Testing the membrane surface and comparing the dry areas with areas where moisture is present below the surface can assist in tracing such a leak to its source. c) As there are many different types and thickness sizes of roofing membranes, it is not possible to give a calibrated percentage measurement.

  • Page 16: Drywall Scale

    MRH III User Guide Rising damp and moisture migration from leaks and defective, or non-existent, vapor barriers can be identified and profiled and often its source identified by moving the instrument across the wall surface. Water damage following flooding or fire fighting can be checked and the drying out and de-humidification process can be monitored.

  • Page 17: Laminate Scale

    MRH III User Guide Laminate Scale For applications where the Roof or Drywall scales are too sensitive and the Masonry scale is not sensitive enough, the Laminate scale can be used. This scale used can be used for testing on ceramic tiles and other wall and floor coverings. It can also be used in many other applications where the other scales do not have the required sensitivity.
  • Page 18 MRH III User Guide approximate relationship between the ambient relative humidity and equilibrium moisture content in woods. g) The following moisture content levels are given as a guide Furniture: 5% to 6% when used in locations of low • relative humidity and up to 10% to 11% may be acceptable where the relative humidity is higher.
  • Page 19 For measuring the moisture in concrete, the Tramex CME4, CRH or CMEXpert should be used. c) Your MRH can be used to measure the moisture content of the wood floor to ensure it meets specification.
  • Page 20 MRH III User Guide NOTE: On the Wood, Drywall, Roofing and Laminate Scales the depth of penetration of When using any of these scales on wood or laminate over concrete or other screeds, the MRH will be reading through the material and may be giving a much higher than expected reading.
  • Page 21 Concrete. Your MRH is not calibrated for concrete. The Tramex Concrete Encounter CME4, CMExpert and CRH instruments are specifically designed for concrete flooring and are recommended where quantitative measurements are required.
  • Page 22 MRH III User Guide Table of Wood Specific Gravities (S.G.) HARDWOODS Am. = American Alder, Red (Am. Alder, Western Alder) Alnus rubra 0.41 Ash, White (Northern / Southern Ash) F. americana 0.60 Aspen, Quaking (Am. Aspen) Populus tremuloides 0.38 Basswood (Am. Basswood, Linden) Tilia americana 0.37 Beech Fagus Grandifolia 0.64...
  • Page 23 MRH III User Guide Cedar, Incense 0.37 Cedar, Port-Orford 0.43 Cedar, Western Red 0.32 Douglas Fir, Coast 0.48 Douglas Fir, Interior West 0.50 Fir, California Red 0.38 Fir, Grand 0.37 Fir, noble 0.39 Fir, Pacific Silver 0.43 Fir, White 0.39 Hemlock, Western 0.45...

  • Page 24: Wood Pin Meter Mode

    MRH III User Guide Wood Pin Meter Mode Factors Affecting Moisture Readings The readings of all moisture meters are influenced by the characteristics of different species of wood as well as temperature and other factors listed below. Species Different species of wood can vary in density and conductivity, which can have an effect on the electrical resistance of the wood.
  • Page 25 MRH III User Guide driven into the wood, readings can be taken at different depths unaffected by moisture on the surface. Wood Flooring a) Excess moisture in wood flooring can cause major problems. b) For instance, if installed with excess moisture, the wood can subsequently shrink leading to job failure.
  • Page 26 MRH III User Guide The following moisture content levels are often quoted in the wood industry and should be used as a guide only. Please contact industry associations manufacturers their specifications. Furniture: 5% to 6% when used in locations of low •...
  • Page 27 MRH III User Guide Example 1: If meter reads 15% and temperature of wood is 10°C (50°F), actual moisture content is 17%. i.e.15%+2%=17% Example 2: If meter reads 15% and temperature of wood is 50°C (122°F), the actual moisture content is 11%. i.e.15%- 4%=11%...

  • Page 28: Sp C Ecies Adjustment

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  • Page 40: Rh Probe

    5% when measured with a Tramex CME4, Tramex CRH or Tramex CMEX. RH probes should not be left enclosed 4.2843 www.calcert.com...

  • Page 41: Calibration

    If the value is outside this range, repeat the test after a further 2 hours. If the RH value is still outside specification, return the RH probe to Tramex for investigation. 10. When the calibration check test has been completed, removeRH probe and sleeve from cell.

  • Page 42: Warranty

    In no event shall Tramex, its agents or distributors be liable to the customer or any other person, company or organisation for any special, indirect, or consequential loss...
  • Page 43 Section 13, 14 and 15 of the Sale of Goods Act 1893. Warranty claims A defective product should be returned shipping pre paid, with full description of defect to your supplier or Tramex at address shown below. Product development It is the policy of Tramex to continually improve and update all its products.

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