Weight | 600 g (without rechargeable battery) |
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Dimensions | 270 x 90 x 65 mm |
Operating temperature | -5 to +45 °C |
Display size | 240 x 320 pixels |
Display function | Colour graphic display |
Power supply | Rechargeable battery pack 3.7 V / 2.6 Ah; Mains unit 6 V / 1.2 A |
Maximum memory | 500,000 readings |
Storage temperature | -20 to +50 °C |
Measuring range | ±10000 Pa |
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Accuracy | ±3 % of mv (10 to 10000 Pa) plus ±1 Digit ±0.3 Pa (0 to 9.99 Pa) plus ±1 Digit |
Measuring range | 0 to 21 Vol.% |
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Accuracy | ±0.2 Vol.% |
Resolution | 0.1 Vol.% |
Reaction time t₉₀ | < 20 s |
Standard readings taken during services of domestic heating systems include checking the gas pressure on the burners. This involves measuring the gas flow pressure and gas resting pressure. 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 boiler must not be put into operation. If put into operation nonetheless, the burner will not be able to function properly, and explosions will occur when setting the flame and ultimately malfunctions; the burner will therefore fail and the heating system will shut down.
When measuring temperatures on radiators, the flow and return temperature are recorded in particular and assessed by the tradesman. 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 accordingly 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 are 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) therefore requires hydraulic adjustment for systems being set up or overhauled for this very reason.