Dear Experts,
We generalised our CE logo with 5 mm size in all our products.
Currently we are producing a small sized product where we cannot keep the
CE logo size at 5 mm. What is the minimum size recommended / prescribed in
the standard for the CE logo. If the product cannot accommodate
Dear Experts,
Is it possible to do accelerated life testing and calculate MTBF
through that? Are there any labs offering this service? What will be
correlation between MIL HDBK 217 method of MTBF calculation and HALT
method? Which one will be reliable and reasonable?
Sincerely      Â
The lab where we regularly test follow the below sequence.
1. Run the peak scan with 10 milli seconds dwelling at each step.
2. Repeat this for 3 or 4 times, because in every run generally some new
frequencies are getting added to the list.
3. Rotate the turn table in steps of 30 deg. angle and
Dear Experts,
For the EFT / B testing for the noise is injected on the protective
earth conductor which will be the return path. In our USB device, signal
ground (- ve of 5 volts DC supply from the USB) and USB cable shield are
same points. USB cable shield is connected to chassis of the PC
Dear Experts,
We have done a 2 layer PCB design for a smart card reader cum PC
keyboard. 3 revisions of PCB completed so far but still we could not clear
the radiated emission testing as per customer spec. Customer demands 6 dB
margin wrt the CISPR22 Class B limits.
We look for
Dear Peter,
Thanks for the feedback. For one product we went through TUV and
found that for everything they follow UL standards. They demand UL file
number for all the critical parts. In that way we felt UL is the master and
leading in defining the standard hence continuing with UL.
Dear Perkins,
Thanks for the valuable feedback, certainly it is very useful in many
practical aspects. The condition prevailing in ITE industry today does not
allow slips in schedule. I am sure that not only SCM every one is waking in
a tight rope. If I tell my supply chain to start
Dear Experts,
We submit most of products to UL for 60950 listing. Almost 95 % of
our products are UL listed. We find it very difficult to complete the
cycle. Many times we come across situations that the parts used are not
meeting UL spec. and a redesign is inevitable. This further
Dear Experts,
We have tested our ITE device for FCC Part15 Class B compliance in an
NVLAP accredited lab. In the same lab for the same device we conducted
testing for CISPR22 Class B compliance also. Based on these 2 reports we
have issued DoC for placing the device in US EU market. Now the
Dear Members,
We are trying to emboss the VCCI logo in the plastic casing of an
ITE product and we need VCCI logo in dxf format. From the VCCI official
website we are able to get the eps jpg format only but we are not able to
create the logos properly with these files. May I request the
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