Text version of the page

SKYWATCH

®

Agros with 80 cm piercing probe Instructions Manual

You have just acquired a high precision instrument, manufactured using the most up-to-date technologies. It was conceived to resist to an intensive use. However and so that it preserves its aspect and its precision, we recommend that you to treat it carefully and to carefully read this owner's manual. The LCD panel is split into 2 areas : Centre: display of humidity gradient Bottom: display of temperature modes

Start up

To start up your Agros, push either the temperature or the wind button.

Measuring Humidity

The humidity sensor is located at the end of the 80 cm piercing probe. Ambient humidity : Measurement unit : % rH (percentage of relative humidity)Display : resolution to 0.5 % rHMeasuring range : from 2 % rH to 100 % rHMeasuring cycle : one measurement carried out every secondPrecision : +/- 3.5 %Response time : in the event of a sudden change in the humidity or temperature, one should give the sensor enough time to allow it to adapt to the ambient air. Please refer also to Response time in the section “Measuring temperature”.In general, the following facts must be taken into account when measuring :

1.

Ambient humidity depends on the temperature. When moving the instrument from a warm environment to a cold environment, the values measured will vary;

2.

Humidity is not equally distributed in the atmosphere. Consequently, even though two locations used for measuring may be close to each other, both results may be quite different;

3.

A person perspiring and/or breathing very near the instrument may impact on the measurement. Dew point : The dew point is calculated by taking into account the humidity and the ambient temperature. It gives the temperature at which the water vapour contained in the air has reached saturation point (forming of cloud, fog, dew, condensation on objects, etc.)Example : At an ambient temperature of 23°C and with a humidity of 39.5 % rH, the dew point is at 12°C Display : Press the temperature button for about one second, then release it in order to display the temperature of the dew point. The dew point in °C or °F is then shown in the lower part of the display, using the symbol .

Measuring Temperature

The temperature sensor is located at the end of the 80 cm piercing probe. Ambient temperature : Measurement units : in order to choose between units, press the temperature button for approximately 4 seconds. The following selection will appear: °C (degrees Celsius) and °F (degrees Fahrenheit) Display : resolution to 0.5°C / 1°F