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    testo 312-4 - Manómetro diferencial

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  1. Prueba de estanqueidad y prueba de resistencia en conductos de gas
  2. Prueba de aptitud para el uso con aire después de una caída de presión en los conductos de gas
  3. Prueba de presión con aire en las tuberías de agua potable y tuberías de desagüe
  4. Registro automático de los valores de medición durante varias horas
    5. Con el manómetro diferencial electrónico testo 312-4, puede hacer todas las pruebas necesarias en los sistemas de calefacción de gas, así como en las tuberías de agua y los conductos de gas. Los procesos de medición predefinidos como, por ejemplo, para las pruebas de resistencia y estanqueidad, así como la prueba de aptitud para el uso en los conductos de gas le ayudan en su trabajo.
    Diversas directrices describen las pruebas que deben efectuarse antes de poner en funcionamiento las tuberías de agua y los conductos de gas. El manómetro diferencial testo 312-4 ofrece procesos de medición para las pruebas de resistencia y estanqueidad, así como para la prueba de aptitud para el uso con aire. Además, también permite comprobar la presión en reposo y la presión durante el flujo de gas y el ajuste de la presión de la tobera en los quemadores o calderas de gas.
     

    Estas mediciones son posibles con el manómetro diferencial testo 312-4

    • Prueba de estanqueidad y prueba de aptitud para el uso después de una caída de tensión en los conductos de gas conforme a DVGW-TRGI 2008
    • Prueba de resistencia en conductos de gas conforme a DVGW-TRGI 2008 con ayuda de nuestra sonda de alta presión (disponible opcionalmente)
    • Prueba de presión con agua en tuberías de agua potable y con ayuda de la sonda de alta presión opcional de acuerdo con la normativa DIN 1988 (TRWI), sí como con aire conforme a la normativa ZVSHK
    • Prueba de presión en las tuberías de desagüe con ayuda de nuestra sonda de alta presión (disponible opcionalmente)
    • Comprobación del regulador de presión por medio del registro de los valores medidos durante un periodo definido (máx. 25.000 lecturas)
    • Comprobación de la presión en la toma de gas y la presión del flujo de gas así como el ajuste de la presión de la tobera en quemadores y calderas de gas
       

    Características prácticas del manómetro diferencial

    Para una aplicación eficiente de la medición de presión, el medidor de presión testo 312-4 ofrece una gran facilidad de uso; a través, por ejemplo, de los procesos de medición predefinidos o la visualización clara de las lecturas de medición en la gran pantalla. Con la impresora rápida testo opcional puede imprimir los datos medidos desde el lugar de trabajo. Para la transferencia y la evaluación de los datos tiene a su disposición el software easyheat. Además, al manómetro diferencial también se pueden conectar otras sondas disponibles para diferentes clases de medición (p. ej., la sonda de alta presión o la sonda termopar para medir la temperatura).

    Manómetro diferencial testo 312-4, se incluyen pilas y protocolo de calibración.

    Datos técnicos generales

    Medidas
    219 X 68 X 50 mm
    Interfaz para impresora
    Interfaz infrarroja
    Transmisión de datos
    RS 232
    Software para PC
    Easyheat
    Memoria
    25.000 valor medido
    Peso
    600 g

    Tipo K (NiCr-Ni)

    Rango
    en función de la sonda de temperatura empleada
    Exactitud
    ±0,4 ºC (-100 hasta +200 ºC)*
    ±1 ºC (Resto rango)*
    Resolución
    0,01 ºC
    *Los datos de exactitud sólo son válidos para el instrumento sin sondas conectadas

    Presión diferencial (sensor interno)

    Rango
    0 hasta 200 hPa
    Exactitud
    ±0,03 hPa (0 hasta +3 hPa)
    ±2 hPa o ±1 % del f.e. (41 hasta +200 hPa)
    ±1,5 % del v.m. (+3,1 hasta +40 hPa)
    Resolución
    0,01 hPa

    Pressure measurements on burners

    Checking the gas pressure on burners is one of the standard measurements during services of domestic heating systems. This involves measuring the gas flow pressure and gas resting pressure of the system. The flow pressure, also called supplied pressure, refers to the gas pressure of the flowing gas and resting pressure of the static gas. If the flow pressure for gas boilers is slightly outside the 18 to 25 mbar range, adjustments must not be made and the appliance must not be put into operation. If the burner is nevertheless put into operation, it will not be able to function properly and, when the flame is generated, small explosions will occur and ultimately malfunctions; the burner will therefore shut down and the heating system will fail.

    testo 312-4

    Pressure tests on gas pipes (load test)

    The technical regulation for gas installations (in short: TRGI) is a binding and at the same time important regulation for skilled tradespeople. The TRGI governs how gas installations are to be planned, designed, serviced and maintained. This applies to all gas installations. This regulation is taken care of by the German Association for Gas and Water (DVGW). The TRGI 2008 is the current version. Amongst other things, this states that gas pipes are to be tested according to the construction phase (basic shell, completion and repairs). Load testing is one of the checks that plays a role in the application stated here: in this process, the material of a gas pipe is tested for stability and the connections for service life; this takes place prior to plastering over or concealment of the gas pipes. During load testing, the newly installed pipe, without fittings or gas appliances, is put under 1 bar pressure. The testing medium is air or inert gas. There must be no pressure drop detected during the test, which lasts at least 10 minutes.

    Pressure tests on water pipes

    According to the legal regulations of DIN EN 806-4, DIN 1988-7 and DIN 1610, drinking and waste water pipes are to be tested for leaks before being put into service by means of a pressure test with air, inert gas or water; they are also to undergo load testing with air or inert gas. However, for reasons of hygiene, it is best if the pipes remain dry until shortly before commissioning and do not undergo a leak test using water. A pressure test with air is also recommended to prevent metallic materials from corroding. The pressure test is split into two pressure-related parts where test pressure and time depend on the objective (load or leak). Leaks can usually be heard very quickly. If it is difficult to locate the leaks, the usual auxiliary tools and materials for gas pipes are used (spraying or brushing on foaming solutions).

    testo-312-4

    Pressure tests on gas pipes (leak, load test)

    The technical regulation for gas installations (in short: TRGI) is a binding and at the same time important regulation for skilled tradespeople. The TRGI governs how gas installations are to be planned, designed, serviced and maintained. This applies to all gas installations. This regulation is taken care of by the German Association for Gas and Water (DVGW). The TRGI 2008 is the current version. Amongst other things, this states that gas pipes are to be tested according to the construction phase (basic shell, completion and repairs). The following checks in particular play a role in the application stated here:

    Load test
    In this process, the material is tested for stability and the connections for service life; this takes place prior to plastering over or concealment of the gas pipes. During load testing, the newly installed pipe, without fittings or gas appliances, is subjected to 1 bar pressure. The testing medium is air or inert gas. There must be no pressure drop detected during the test, which lasts at least 10 minutes.

    Leak test
    This test is for checking the pipe for leaks, with fittings and without gas appliances. The measuring instrument must not register any drop in pressure during the minimum 10-minute testing period (depending on the system volume); the test pressure is 150 mbar (previously 110 mbar).

    testo 312-4

    Temperature measurements on radiators

    When measuring temperatures on radiators, the flow and return temperature are recorded in particular and assessed by the tradespeople. The flow temperature is defined as the temperature of the thermal transfer medium (e.g. water) that the system is supplied with. The temperature of the medium flowing out of the system is correspondingly called the return temperature. To prevent losses within the heat distribution system and achieve a better level of efficiency, spot recording of flow and return temperatures is necessary. Implementation of relevant measures ultimately leads to hydraulic adjustment on the basis of knowledge about the flow and return temperatures. This defines a procedure with which every radiator or heating circuit of a flat radiator within a heating system is supplied at a set flow temperature with the precise amount of heat needed to achieve the ambient temperature required for the individual rooms. Flawed operating conditions will result in considerable excess consumption of electricity and heating energy. The German Energy Saving Regulation (EnEV) requires hydraulic adjustment for systems being set up or overhauled for this very reason.

    Pressure tests on gas pipes (leak test with external high pressure probe, load test)

    The technical regulation for gas installations (in short: TRGI) is a binding and at the same time important regulation for skilled tradespeople. The TRGI governs how gas installations are to be planned, designed, serviced and maintained. This applies to all gas installations. This regulation is taken care of by the German Association for Gas and Water (DVGW). The TRGI 2008 is the current version. Amongst other things, this states that gas pipes are to be tested according to the construction phase (basic shell, completion and repairs). The following checks in particular play a role in the application stated here:

    Load test
    In this process, the material is tested for stability and the connections for service life; this takes place prior to plastering over or concealment of the gas pipes. During load testing, the newly installed pipe, without fittings or gas appliances, is subjected to 1 bar pressure. The testing medium is air or inert gas. There must be no pressure drop detected during the test, which lasts at least 10 minutes.

    Leak test
    This test is for checking the pipe for leaks, with fittings and without gas appliances. The measuring instrument must not register any drop in pressure during the minimum 10-minute testing period (depending on the system volume); the test pressure is 150 mbar (previously 110 mbar).

    testo 312-4