ISO TS 13499 - CFC code

[faz_shah]

Hi,

As per ISO TS 13499 there are two code for CFC 1000 - A and E,what is the difference between them and how to select the right code?

Regards,

faz..

[Brad_Turpin]

Hi faz,

The "A" vs. "E" character is the 16th character in the ISO-MME channel name, which contains the filter class:

ISO/TS 13499 - RED B : 2012 E

0 Unfiltered 1.0
1 FIR 100 NHTSA Filter Code 1.0
2 Combined A and B NIJ according to SAE J1727 1.0
3 Combined B and C CTI 1.0
A CFC 1000 ISO 6487* / SAE J211:MAR95 1.0
B CFC 600 ISO 6487* / SAE J211:MAR95 1.0
C CFC 180 ISO 6487* / SAE J211:MAR95 1.0
D CFC 60 ISO 6487* / SAE J211:MAR95 1.0
E CFC 1000 ISO 6487:1987 / SAE J211:OCT88 1.0
F CFC 600 ISO 6487:1987 / SAE J211:OCT88 1.0
G CFC 180 ISO 6487:1987 / SAE J211:OCT88 1.0
H CFC 60 ISO 6487:1987 / SAE J211:OCT88 1.0
P Prefiltered > CFC 1000 Described in 'Test Channel File' 1.0
Q Prefiltered < CFC 60 Described in 'Test Channel File' 1.0
S Special Filter See Channel Header 1.5
V Data from film(video) analysis 1.3
X Without (Constant Channel) 1.0

DIAdem uses code "A", the SAE J211:MAR95 filter class.  The "E" filter class is an earlier version of this same filter with minor boundary condition changes.  DIAdem uses the newer standard for the filter condition.

Brad Turpin

DIAdem Product Support Engineer

National Instruments

[faz_shah]

Hi,

I understood the channel nomenclature, but still have some doubts;

• if the boundary conditions have changed why do we have a code for the old one.
• when you say boundary conditions, is it the frequency levels (FG, FJ and 2*FH)
• when we use CFC 1000 and 600 does it use the as per SAE J211:MAR95 1.0 or SAE J211: OCT88 1.0
• is the old version of filter still being used.

Just curious to know.

Regards,

faz...

[Brad_Turpin]

Hi faz,

DIAdem always uses only the 1995 version of the CFC filter.  What code for the old version are you referring to?  Is this custom C++ or Basic or Fortran code that you developed, or is it a *.vbs or *.aut file that automates DIAdem?

Brad Turpin

DIAdem Product Support Engineer

National Instruments

[faz_shah]

Hi Brad,

When I said code I meant the 16th charecter in the ISO channel naming nomenclature and not any script or automation file, sorry for confusing.

What I wanted to ask is, if we use only 1995 version of the CFC filter then 16th digit that may be used will be any one of A, B, C and D only. So I do not understand why E, F, G and H have been defined in the ISO 13499.

Thanks in advance.

Regards,

faz...

[Brad_Turpin]

Hi faz,

The ISO-MME Standard was developed in the 1990s.  The predecessor of ISO-MME was the extended version of ISO/DTR 13499 adopted by the German workgroup for impact test instrumentation (SAE).  Back in the 1990s it would have been possible that some evaluation systems still used the SAE standard from OCT88.  This older standard was included in the inaugural ISO-MME standard for historical and transitional compatability reasons.

Brad Turpin

DIAdem Product Support Engineer

National Instruments