Vaisala WXT536 - Page 153

Chapter 8 ____________________________________________ Sensor and Data Message Settings
VAISALA______________________________________________________________________ 151
The factory default settings for analog input:
- All measurement messages enabled
- Update interval 60 s
- Solar radiation and aux level averaging time 3 s
- Solar radiation gain 100 000
- Aux level range 5 V
- Aux level gain 1
- Aux temperature average time 1 s
- Aux rain counter reset: manual
- Aux rain gain 0.2 (for 0.2 mm per tip)
Table 22 Analog Input Setting Definitions
Setting Default value Definition
Update interval 1 min Defines analog input measurement interval. A shorter interval
and a longer averaging time increase power consumption.
Solar radiation and
aux. level
averaging time
3 s Defines averaging times for solar radiation and aux level
voltage measurement.
Solar radiation
gain
100000 Taken from solar radiation sensor calibration documents
provided with the sensor. For example for sensitivity
19.71µV/W/m
2
gain is 1 / 0.00001971V/W/m
2
= 50736
Aux. level range 0 ... 5 V Selects voltage measurement range. Available ranges:
0 ... 2.5 V, 0 ... 5 V, 0 ... 10 V
Aux. level gain 1 Defines gain factor for auxiliary level voltage measurement.
Gain can be used to convert voltage reading directly to
distance/height.
Aux. temperature
averaging time
1 Defines PT1000 temperature sensor measurement averaging
time in seconds. To minimize sensor self-heating effect, make it
short.
Aux. rain counter
reset
M = No reset Defines how to reset the rain counter. M means that you have
to manually reset the counter.
Aux. rain gain 0.2 mm Comes from the rain sensor tipping bucket size. It means
pulses / user rain unit (for example, mm). If the aux. sensor has
5 pulses per mm of rain, and the user sets the gain to 0.2, the
rain value reported by the transmitter is in mm.
Aux. rain counter
limit
Used only when L = based on limit is selected. Resets the rain
counter when it reaches this value. The same unit as the gain
G has.