Explanatory document to ECE/TRANS/WP.11/2018/15 
  Transmitted by the Government of Finland 
 
        INF.12 
Economic Commission for Europe 
Inland Transport Committee 
Working Party on the Transport of Perishable Foodstuffs 
Seventy-fourth session 
Geneva, 8-12 October 2018 
Item 5 (f) of the provisional agenda 
Status and implementation of the Agreement on the  
International Carriage of Perishable Foodstuffs and  
on the Special Equipment to be Used for such Carriage (ATP):  
interpretation of ATP 
 
 
3 October 2018 
 
 
Explanatory document to TRANS/WP.11/2018/15 
Proposed amendment to Annex 1, Appendix 2, Paragraph 6.5: 
Cool down test, measuring the outside temperature 
Unstable outside conditions, example data and figure: 
 
Cool down time from the initial temperature 16.0 °C to the class temperature -20.0 °C is 4:10 (250 
min) 
Three different interpretations: 
(a)  "Coldest point outside" when class temperature has been reached, 21.0 °C  max 
cool down time 4:30 (270 min)  PASS 
(b)  "Coldest point outside" over the whole cool down, 16.0 °C  max cool down time to 
3:40 (220 min)  FAIL 
(c) Mean outside temperature over the whole cool down, 20.9 °C  max cool down time 
4:30 (270 min) (note 20.9 is rounded to 21)  PASS 
Depending on the interpretation, the result could be PASS or FAIL. For example in class FRC each 
  degree of C represents 10 minutes in allowed cool down time.
-20.0 °C, "warmest point inside" at 4:10 (250 min) 
Condenser air inlet 
(a) 21.0°C, "coldest point outside" 
at 4:10 (250 min) 
(c) Mean outside temperature 20.9 °C over 
the whole cool down until -20.0 °C inside has 
been reached 
(b) 16.0 °C, "coldest 
point outside" 
Outer wall 
Inside rear 
Inside front 
(a), (c) (b) 
 
 
Stable outside conditions, example data and figure: 
 
Cool down time from the initial temperature 20.0 °C to the class temperature -20.0 °C is 4:10 (250 
min) 
Three different interpretations: 
(a)  "Coldest point outside" when class temperature has been reached, 19.8 °C  max 
cool down time 4:20 (260 min) (note 19.8 is rounded to 20)   PASS 
(b)  "Coldest point outside" over the whole cool down, 19.6 °C  max cool down time to 
4:20 (260 min) (note 19.6 is rounded to 20)   PASS 
(c) Mean outside temperature over the whole cool down, 20.0 °C  max cool down time 
4:20 (260 min)  PASS 
No remarkable differences between interpretations if outside temperature remains stable.  
*** 
-20.0 °C, "warmest point inside" at 4:10 (250 min) 
Condenser air inlet 
(a) 19.8 °C, "coldest point outside" 
at 4:10 (250 min) 
(c) Mean outside temperature 20.0 °C over 
the whole cool down until -20.0 °C inside has 
been reached 
(b) 19.6 °C, "coldest 
point outside" 
Outer wall 
Inside rear 
Inside front 
(a), (b), (c)