Skye DATAHOG 2, Инструкции

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D) The tensiometer's Zero Offset shown the logger's hardware Configuration Certificate is in shown
counts rather than in hPa as needed to calculate the
Threshold to enter for switching relays.
The hPa value can be calculated as below, or read from the logger's Main menu, Option 1 Display
Current Setup and Option 2 Log Mode & Thresholds. You must change the sign of the value
shown in this menu. (
Alternatively, to calculate the tensiometer Zero offset in hPa, divide the Zero Offset in counts by
the 'number of counts per hPa'. (
)
E) Now add the tensiometer Zero Offset in hPa to the required switching threshold in hPa.
(
)
F) Multiply the "number of counts per hPa" by this new threshold (to obtain the counts value at the
threshold) and enter this in the xxxxx or -xxxxx
(e.g. 0034 for the sensor SKT 650 26123)
e.g. for the tensiometer SKT 650 26123 the Logging Threshold shows
009.78, so use the value +009.78 hPa for the tensiometer Zero Offset)
e.g. +0034/+3.47 = +9.80 hPa
e.g. if you wish to switch irrigation at 30 hPa, add 30 + 9.8 = 39.8 hPa
e.g. to switch for tensiometer SKT 650 26123 at a threshold of 30 hPa:
(30 hPa + 9.8 Zero Offset hPa) * 3.47 = 138.11.
DATAHOG 2 & SKYELYNX STANDARD SOFTWARE
Instructions to reconfigure a tensiometer relay channel
Updated 08/10/07