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MSD IAQ Detector -User Manual
situations where disassembly is difficult, be sure to completely wrap the MSD to prevent paint,
paint, and dust from entering the MSD.
■This product should avoid the deviation of CO2 measurement caused by the product's drop and
impact caused by the beam shift in the sensor chamber; it should avoid the long-term exposure
of the product to the high concentration of total organic volatile gas, which may cause the
sensor poisoning to be unrecoverable. For example, the concentration is greater than several
times the TVOC range in the MSD.
■When the temperature of the MSD
environment changes greatly, for example,
if the product has just been received during
the cold weather, it should be placed
indoors for 8 hours before being powered
on. Or move from the air-conditioned room
to the non-air-conditioned area, etc., and
also need to be placed for at least 2 hours
before powering up.Avoid excessive temperature difference and cause condensation or
equipment damage.
■Never use other pigments to apply the MSD casing to avoid clogging the inlet and outlet, and
the pigment entering the MSD chamber.
■Do not use cigarettes to test PM2.5 measurements. Because the particles of cigarettes are
mostly between 0.1 and 0.3 microns, and the concentration cannot be controlled. As a result,
the PM2.5 measurement deviation is too large.
■When multiple MSDs use RS485 wired networking, when sharing a power supply, make sure
that the power supply wiring uses the same name of the power polarity, and the wrong
connection will cause damage to the equipment.
■Re-use after first use or long time, it should be continuously energized for more than 48 hours to
ensure stable output of all measured values.
■The built-in CO2 sensor of MSD have a self-calibration function. The readings may be
deviations after power on or after a period of power off.And will be getting normal work after 2-7
days with continuously power on.And will be automatically calibrated during long term use.
Equipment maintenance and fault check
■To ensure accurate MSD data, regular maintenance is required in normal use environments.
Depending on the environment in which it is used, maintenance is usually required once every 3 to 6
months. The special environment should shorten the maintenance period, such as public places with
large dust, dry seasons and pollen seasons, and poor environmental cleanliness.
■General maintenance includes: cleaning the filter and using a vacuum cleaner to remove dust
inside the filter. If there is a large deviation in the measured value, or if dust and debris cannot be
cleaned after entering, you need to return to the factory for re-cleaning and calibration.
■In the normal use environment, when the fault phenomenon in the following list occurs, please
check it yourself. Initially determine the cause of the failure. If the fault cannot be eliminated, contact
the dealer or the manufacturer.
