
USER MANUAL
SOLDERABILITY TESTER
METRONELEC
V2.0
–
10/2021
6 Avenue Eiffel - 78420 Carrières-sur-Seine
Tél : 01 30 15 20 00
Web :
http://www.metronelec.com| Mail : [email protected]
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sur
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Flux : type R or RMA (CMA from the NF French standard NF C 90550) Alloy Sn60Pb40 at 235
°C
Immersion speed 20 to 30 mm/s
Immersion depth 4 or 2 mm
Immersion time : time as a function of the component size being admitted that the reference
time is 3 s for small components (including the CMS).
Pre heat : no
Pass / Fail criteria(s) : the solderability quality is classified into four categories according to
the following table
SOLDERABILITY CLASS
QUALITY
ANGLE VALUE ( ° )
1
EXCELLENT
8 : 30
2
GOOD
8 : 40
3
ADMISSIBLE
8 : 55
4
UNCERTAIN
8 : 55
The experience gained in production and assembly workshops enables the following table to
be drawn up:
Note: if a sample in ten does not fall in the category chosen, one should measure five new
samples which must all be satisfactory.
NF 89400 P
This standard defines only the bath method.
This is a variant of the previous one, we use in this case the force divided by the wettable
perimeter as presented before. The “P” means perimeter.
We can use the wetting force (Fw/mm) extracted from the balance or the resultant force
(Fr/mm) directly from the sensor.
The test conditions are :
Ageing
: not mandatory
Flux
: type R
Alloy
: Sn60Pb40 at 245 °C Immersion speed : 20 to 30 mm/s Immersion depth : 4 or 2
mm.
Immersion time
: 5 to 10 s.
Pre heat
: no
Pass / Fail criteria(s)
:
zero crossing time less than 0.59 s (time to across the “x” axis
Time to obtain 2/3 of the maximum force less than 1.0 s
Mil
–
Std
–
883C method 2022
This standard defines only the bath method.
This standard is a US military specification, designed for traditional components like DIL
cases.