IEC 60068-2-68:1994

FOREWORD
INTRODUCTION
Clause
1 General
  1.1 Scope
  1.2 Description of Test L
2 Normative references
3 Definitions
4 Test La: non-abrasive fine dust
  4.1 Method La1: cyclic air pressure
  4.2 Method La2: constant air pressure
  4.3 Guidance for test La
5 Test Lb: free settling dust
  5.1 Object
  5.2 Method Lb
  5.3 Guidance for test Lb
6 Test Lc: blown dust and sand
  6.1 Method Lc1: recirculating chamber
  6.2 Method Lc2: free blowing dust
  6.3 Guidance for test Lc
Figures
Annexes
A General guidance
B Bibliography

Specifies test methods to determine the effects of dust and sand suspended in air, on electechnical products.