Kipp&Zonen COMBILOG Data Logger - Manual (Page 54)

spez1(INTERFACE; TYPE; START; VAR; DEFAULT)
• INTERFACE
• 1: RS232
• 2: RS485
• TYPE
• 1: constant length
• 2: variable length
• START: start position (starting with '0')
• VAR
• for TYPE = 1: value length
• for TYPE = 2: delimiter character (ASCII value)
• DEFAULT: on error this is value will be returned
In defining more than one arithmetic channel with this function
you can extract more than one value from one ASCII telegram.
To convert a variable value with start position 10, delimiter #,
interface RS485 and default value –1 from
“Value:_0023,6697#END” the call to spez1() should be
spez1(2; 2; 10; 35; -1) and the result is 3.6697.
With special function spez2() some special meteorological val-
ues can be calculated. The following functions are defined:
●
spez2(air pressure; height; 1);
Calculates the air pressure on sea level out of air pressure at
given height.
●
spez2(app_wind; fair_wind; wind_angle; 2);
Calculates the true wind speed out of apparent wind, fair wind
and the enclosed angle.
●
spez2(temperature; radiance_balance; saturation_deficit ;
wind_speed; 3);
Calculates the evaporation acc. to Penman-Monteith.
Hardware Manual COMBILOG 1022 54