User manual SEWERIN SNOOPER MINI H

[. . . ] z The manufacturer is not liable for damage resulting from arbitrary modifications of the product. z Only spare parts may be used which are approved by Hermann Sewerin GmbH. z Only approved battery types may be used. Technical changes within the scope of further development reserved. [. . . ] 35 English English 5 5. 1 Measurement mode How to start the measurement mode Note: The device must always be switched on in an unpolluted environment (e. Device is switched on, audible signal sounds Display flashes, time bar runs out Why? Indication on the display Heating period, approx. 20 s 3. Device ready for measuring Note: After switching on, the device needs one minute to recognise whether it is operated with disposable or rechargeable batteries. After this check, the battery icon is indicated. 37 English English 5. 2 Increased gas concentration An automatic audio signal makes the user always aware of an increased gas concentration. Audible signal of the device (loudspeaker key) z switched on: the interval signal gradually changes to a steady tone z switched off: steady tone sounds as soon as the device measures a value higher than 1 vol. % 38 5. 3 Setting the zero point ­ when and how?When working with the SNOOPER mini, the zero point may start to drift (e. if the device is ready for measuring and put aside for some time). In this case, the display indicates a value deviating from zero. The device is ready to reset the zero point. z Re-press brieflyon the ON/OFF key within 5 seconds. The zero point is reset. 5. 4 Verifying the indication accuracy ­ when and how?According to DVGW regulations (DVGW: German technical and scientific association for gas and water), it is required to check the indication accuracy in intervals ranging from every week to every six months ­ depending on the frequency of usage and experience. Gas type of the device Methane Propane Hydrogen Test gas 1 vol. % CH4 1 vol. % C3H8 Permissible range 0. 8 ­ 1. 4 vol. % 1, 000 ppm H2 800 ­ 1, 400 ppm 39 z The device must be ready for measuring (see chapter 5. 1). z Apply test gas with the help of a suitable test set (e. z Compare the deviations indicated by the device with the permissible values in the table. If the values are outside the permissible range, you need to perform an adjustment (see chapter 6). English English 6 Adjustment The device must be adjusted if the deviation of the indication accuracy is outside the permissible range (see chapter 5. 4). 6. 1 Tools and requirements Required tools: z Suitable test set (e. SPE HG, SPE-Y) z Test head z Test gas, depending on the type of gas of the relevant device (see table in chapter 5. 4) You can find all information on how to connect the test set to the device in the operating instructions of the test set. Requirements for a proper adjustment: z Device is switched off z Test head is not yet attached z Atmosphere of the environment is not polluted (e. fresh air) 40 6. 2 How to perform the adjustment What to do?Device is switched on, keep pressed and press audible signal sounds What happens?Indication on the display at the same time 2. [. . . ] The filter will be pressed into the correct position. 7. 3 Replacingthefilter The sensor cap contains a filter. The filter must be exchanged, if you detect any soil. z Push the soiled filter from above out of the sensor cap, using a suitable tool (e. z Place a new filter loosely into the sensor cap. [. . . ]