PREPARATIONS FOR SOUNDING BS 
DUO 
~ 
. = Soe 
Pipa eTenpag lth 
Figure B2-4. WB, 230B, Temperature Evaluator 
Se Temperature Evaluator. Using the appropriate temperature evalu- 
ator for the radiosonde in use, set the recorded temperature ordinate to 
tenths opposite the corresponding dry-bulb temperature in degrees and 
tenths Celsius. The two scales of the evaluator are locked together to 
retain this setting which will not be altered during the subsequent raob. 
A short piece of tape may be used for locking together the scales if a 
locking device is not furnished with the evaluator. Opposite any temper- 
ature ordinate on the evaluator, read the corresponding temperature in 
degrees and tenths Celsius. 
9.1 Temperature Limits. Certain limits on the ordinate scale of the 
evaluator have been established within which the 25°C. line must fall. 
The following ordinate ranges, for the 25°C. line shall apply to the eval- 
uators listed: 
Type Evaluator Ordinate Range 
USWB #230 and #230B 69.5 - 73.5 
AMT - 7 and 11 69.5 - 73.5 
CP - 223B/UM 66.5 - 68.9 
1-1-69 FMH#3 
