7
4.3
TEMPERATURE SENSOR CALIBRATION
Calibration of the temperature sensor is limited to checking the operating range of the
sensor. There are no user adjustments available for the temperature sensor.
Check the thermistor operation by comparing the signal at the monitoring equipment
against the temperature readings of a precision thermometer. This procedure assumes
that the monitoring equipment has already been properly calibrated and is working
perfectly.
Ambient temperature readings should be taken by placing a precision thermometer next
to the thermistor shield. Leave the thermometer next to the thermistor long enough for a
stable reading to be made.
If ambient temperature readings are difficult to make right at the thermistor, place the
thermometer at a point that is as close to the thermistor as possible. Try to shield the
thermometer from direct solar heating during the readings. For readings made in this
manner, an agreement of 1 to 2 degrees Fahrenheit would be acceptable.
Increased testing accuracy requires taking the sensor assembly down from its mast and
placing the entire sensor into a chamber with a stable temperature. The chamber should
be equipped with a precision temperature sensor or a thermometer must also be placed
into the chamber next to the thermistor. Again, compare the temperature reading of the
thermistor to that of the precision thermometer. Agreement between the two temperatures
should be close to if not better than the specified accuracy of the thermistor (±0.4° F).
Any thermistor that appears to be out of calibration or that is inoperative must be replaced
by NovaLynx. Contact NovaLynx to arrange for repair of the sensor.
Remember that when the Wind & Temperature Sensor assembly is reinstalled onto its
mast that it should be re-aligned to North.
5.0
SENSOR MAINTENANCE
Maintenance of the Wind & Temperature Sensor assembly is limited. Periodic but regular
inspections of the equipment is necessary to prevent damage due to loose or missing
hardware. Tower and mast mounted sensors experience many vibrations due to high
velocity winds blowing through the tower and mast support structure. These vibrations can
cause mounting hardware to become loose and to fall out. Tighten any loose hardware
and replace any missing hardware.
