Sper Scientific 850069 Environmental Quality Meter w/Sound - Manual (Page 17)

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5. Ensure that the air flow sensor is free
from obstruction and face the air-flow
sensor in the direction of the wind.
6. The meter measures the wind-speed
and ambient temperature of the
surrounding environment and displays
the value.
Relative Humidity Measurement
1. Press POWER to turn the meter on.
2. Continuously press FUNCTION until
the meter displays the relative humidity
and ambient temperature measuring
units (%RH, °C, °F).
Because the hygrometer readings are
taken while holding the meter upside-
down, the measurement values display
upside-down on the LCD (180° from
the other function displays).
MEASUREMENT PROCEDURES