Specifications

• Wind Chill and Heat Index formulas the streaming data logger uses

are the same as the May 2005 revision of the Vantage Pro2 console

firmware. Wind Chill uses the 10-minute average wind for

calculation. Your console must be powered for at least 10 minutes to

utilize a valid wind chill value.

• Dewpoint formula is also the same as what the Vantage Pro and

Vantage Pro2 console uses, but this has not changed from the

original firmware version to present.

• Time: Time is entered in 24-hour format. For example, 10 pm is

entered as 22:00. Enter am values of 1 am or later as they are, enter

pm values of 1 pm or later by adding 12 to the hour. 12 am values

should be entered as 00:00. When using the between and not-

between check types, the Alarm Output data logger is intelligent

enough to handle the midnight rollover. For example, if you set “IF

Time is between 22:00 and 02:00”, the alarm will active when the

time of day is between 10 pm and 2 am including 11 pm, Midnight,

and 1 am and any times in between. Reversing the entries will cause

the alarm to be active nearly all day excluding the period around

midnight.

• Wind Direction: When using the between and not-between check

types, the Alarm Output data logger is intelligent enough to handle

the North rollover. For example, if you set “IF Wind Direction is

between 350° and 10°”, the alarm will active when the wind

direction is between 350° and 10° including 355°, 0°, and 5° and any

directions in between. Reversing the entries will cause the alarm to

be active for most wind directions excluding those around north.

Consult Application Note 28 for more detailed information on how derived

parameters are calculated. This could be found at the Davis Instruments

website:

http://www.davisnet.com/product_documents/weather/app_notes/apnote_28.

pdf .

Clear

Press the Clear button to clear the alarms for this output only. This function

clears both the dialog box entries and the settings in the datalogger. You

must press this button for each of the individual outputs you want to clear.