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user guide

CMEX II

concrete moisture

meter (Digital)

04/2015

Содержание CMEX II

Страница 1: ...user guide CMEX II concrete moisture meter Digital 04 2015...

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Страница 3: ...ent in a floor slab 14 Pre testing guidelines 14 Guideline test procedures as per ASTM F2659 15 Humidity Measurement Mode 16 25 Relative Humidity Measurement 17 MoistureTestingGuidelines 17 23 Hole Li...

Страница 4: ...n concrete and comparative readings in gypsum and other floor screeds 2 Hygro i probe mode This enables the CMEXpert II to measure relative humidity RH temperature dew point temperature and mixing rat...

Страница 5: ...impedance of a material varies with its moisture content The electrical impedance is measured by creating a low frequency alternating electric field between the electrodes as illustrated in Figure 1 T...

Страница 6: ...moisture value In Hygro i probe mode the CMEXpert II determines the capacitance of the RH probe sensor which varies with the relative humidity of the testing environment The CMEXpert II displays this...

Страница 7: ...AUDIO BACKLIGHT Moisture readings and scale are displayed on a clear easy to read liquid crystal display LCD 4 NDT Scales Concrete CM Equiv Carbide Method equivalent for concrete Gypsum and a Ref Ref...

Страница 8: ...tings When time is chosen select key to confirm and return to scale mode Longer backlight timeouts will reduce the battery life Language display adjustment To adjust the language display press the and...

Страница 9: ...s 2 Hygro i Probe Socket automatic hygrometer mode when plugged in 3 Backlit display 4 Hold Key 5 Scale Key 6 UP DOWN Keys 7 ON OFF Key 10 minute switch off 8 Light Key Figure 2 The instrument face wi...

Страница 10: ...ed ensuring that all the electrode spring loaded pins are fully compressed Concrete Scale When the Concrete scale is selected the moisture content MC is shown on the right hand side of the bottom line...

Страница 11: ...ement of percentage moisture content MC or relative humidity RH It is not a relative humidity reading and it does not have any linear correlation with Relative Humidity measurements This scale should...

Страница 12: ...their authorized service provider who will issue a calibration certificate on completion Requirements for quality management and validation procedures such as ISO 9000 and National Standards have inc...

Страница 13: ...ating from a floor covering or coating can cause failures such as condensation blistering delaminating movement and general deterioration of the finished flooring coating There is also a risk of promo...

Страница 14: ...floor slabs are being tested all covering materials adhesive residue curing compounds sealers paints etc shall be removed to expose a test area of clean bare concrete For removal of any existing floo...

Страница 15: ...all of the electrode spring loaded pins are fully compressed Read the moisture measurement from the appropriate scale of the display 3 On a rough surface take a number of readings in close proximity...

Страница 16: ...s Environmental and building monitoring Building inspection Flooring including in situ method as per ASTM F2170 and the in situ and hood methods as per British Standards BS 8201 8203 5325 A typical CM...

Страница 17: ...per next 1000ft2 Holes must be drilled dry and perpendicular 90 do not use water for cooling or lubrication When drying is from the top only it is recommended that the hole should be drilled to approx...

Страница 18: ...he test holes are drilled sleeves are placed and capped and left for a period of 72 hours The probes are then inserted A suitable equilibration time is allowed before taking readings see below If the...

Страница 19: ...e is at the same temperature as the probe Even a slight difference in temperature will produce a significant error in relative humidity measurement Check that meter readings do not drift by more than...

Страница 20: ...USER GUIDE 20 HOLE LINER INSTRUCTION ASTM F2170...

Страница 21: ...rd being followed for the duration of test Place the probe in to RH Hood and cover with Dust Cap if necessary Connect Tramex CMEX II WME or MRH III or to take readings A probe calibration check is rec...

Страница 22: ...area which can be accidently disturbed The floor slab surface should be cleaned of any foreign materials and swept clean of any dust or loose materials that could affect a proper seal between the hoo...

Страница 23: ...itish standards code of practice BS8203 suggests that a concrete floor should be sufficiently dry to allow installation of a resilient floor covering when the measured relative humidity falls to 75 or...

Страница 24: ...ditioning of the NaCI calibration check solution and test procedure As Relative Humidity RH is defined as the ratio of the partial vapor pressure in air to the saturated vapor pressure at a given temp...

Страница 25: ...ability is extremely important for the duration of the test Calibration check salts do not have an expiry date and have unlimited usage when cared for in the correct manner Do check the seal inside ch...

Страница 26: ...od the electrical resistance between the electrodes is measured and indicated on the digital display If the wood is dry the resistance is very high The higher the moisture content the lower the resist...

Страница 27: ...he Wood Probe is calibrated at 20 C 68 F At wood temperatures above 20 C 68 F the meter readings are higher and at wood temperatures below 20 C 68 F the meter readings are lower A temperature adjustme...

Страница 28: ...it meets specification Testing wood and wood products a When testing wood power on insert wood probe into phono socket at the top of the CMEXpert II and select Pin Probe Mode using the key b When a wo...

Страница 29: ...re content in excess of 23 to 25 is susceptible to rot Wood moisture content in excess of 18 to 20 may provide an environment for termite and woodboring insects to thrive and multiply Wood at these hi...

Страница 30: ...on is as follows Species correction 15 16 Temperature correction 40 C 3 Corrected reading 13 Example 2 If meter gives reading 24 on sample of Teak and the wood temperature is 10 C the correction is as...

Страница 31: ...RH and equilibrium moisture content EMC of some woods These figures are approximate values and may vary for different species Table 1 Approx relationship between RH and EMC Relative Humidity Wood MC 1...

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Страница 44: ...tside the set tolerances it is recommended that the CMEXpert II be returned for re calibration Calibration adjustments should not be carried out by anyone other than Tramex or their authorised service...

Страница 45: ...or any other person company or organisation for any special indirect or consequential loss or damage of any type whatsoever including without limitation loss of business revenue profits data savings...

Страница 46: ...lly improve and update all its products We therefore reserve the right to alter the specification or design of this instrument without prior notice SAFETY This Users Guide does not purport to address...

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