DIN EN 16340:2014 pdf free download.Safety and control devices for burners and appliances burning gaseous or liquid fuels – Combustion product sensing devices.
7.101.13 Humidity Dependency
7.101.13.1 Requirement
The effect of humidity changes on steady-state output signal shall be within the value stated in the installation and operating instruction when tested according to 7.101.13.2.
7.101.13.2 Test
The test shall be performed with test gas at 1/3 of maximum, 2/3 of maximum and maximum declared concentration.
a) Fit the CPSD into the test setup with a test gas temperature of 60 °C. Ensure that flow of the test gas out of the delivery system at the concentration mentioned above is constant for steps b) to d).
b) Set up a split gas delivery system such that one arm passes through the humidifier system (for further information refer to Dreschler bottle(s) or vapour delivery system as specified in the standards series VDI 3490) to get a dew point of 60 °C whilst the other arm remains dry. Monitor the humidified arm until steady-state humidity is achieved. All tubes with humid gas (also the tubes where humid and dry gases are mixed) shall be kept at the temperature of 60 °C.
c) Flow the dry gas with the concentration mentioned above wait 10 x T60 and measure the CPSD output signal (R0).
d) Switch successively to the following humidity values (Table 3) by blending the wet and dry gas lines while flowing the same concentration . Wait 10 x T60 before measuring the CPSD output signal (R30, R, R1) and verify the actual dew point which shall correspond to the values in Table 3. For CPSDs which are intended only to measure in flue gases with a dew point lower than 49 °C respectively 36 °C, the measurements R100 and R60, respectively, may be omitted.
NOTE Gas burner flue gas can reach a dew point of 60 °C.
7.101.14 Cross Interference
7.101.14.1 Requirement
The effect of cross interference in the CPSD output signal shall be within the specification as stated in the installation and operating instruction, when tested to 7.101.14.2. The interfering components listed in Table 4 shall be examined. In case that the CPSD is designed for multiple gasses, these gasses shall be excluded
from the list in Table 4.DIN EN 16340 pdf download.