INSPECTING AND TESTING THE RADIOSONDE Bl-7 
1.2 Temperature Section. Examine the temperature section of the 
radiosonde to make certain that: 
a. 
The outrigger is not broken or pulled loose from the box and 
that the wiring is not broken or placed under undue strain. Re- 
ject any radiosonde with a broken or loose outrigger or with 
any broken wires. 
The thermistor is not broken, that the leads are securely 
soldered to the terminals of the carrier frame (if the thermis- 
tor is already installed) and that the white coating is not 
chipped, cracked, or soiled (see §B2-2.5 and 2.5.1). 
1.3 Humidity Section. Check the humidity section to make certain that: 
a. 
The hygristor clips are bent inward so that they will not be- 
come loose and allow the hygristor to fall out or produce an 
intermittent connection in the circuit. 
There are no broken, loose, or disconnected leads. 
There is no oxidation at the points where the clamps contact 
the edges of the hygristor. The silver plated humidity clips 
may become discolored because of the action of sulfides in the 
air. Radiosondes with humidity clips so discolored willnot be 
discarded. 
1.4 Baroswitch Section. Check the baroswitch section as follows: 
a. 
Lo lo@Y) 
Check visually to make certain that the baroswitchis securely 
fixed to the radiosonde case, that the contact arm is not bent, 
and that the linkage is not disengaged. The tip of the pen arm 
of a reconditioned radiosonde is often intentionally bent during 
reconditioning so the contact point will travel over a new and 
unworn path, This is done before calibration andis no reason 
for a rejection, 
Lower the contact arm and check thatthe contact point makes 
physical contact with the surface of the commutator. 
Check that the contact point is within one contact of the pres- 
sure-contact setting (see JB2-15.5) corresponding to the sta- 
tion pressure corrected to the altitude of the radiosonde. If 
the contact point is more than three contacts to the right or 
left of the proper setting, reject the radiosonde. If the contact 
point is from one to three contacts to the right or left of the 
proper setting, adjust the point to the proper setting and 
FMH#3 
