...@majordomo.ieee.org]On Behalf Of Rich Nute
Sent: Monday, December 31, 2001 1:46 PM
To: Cortland Richmond
Cc: xin...@cesi.ac.cn; emc-p...@majordomo.ieee.org
Subject: Re: Fw: working voltage measurement
Hi Cortland:
One can also use a pair of probes known to be well balanced and take the
difference
Yes, it's important to recognize the limitations of a test method before
relying on it. In this case, the A-B method was used at power frequency and
below, to observe discharge time for UL testing. The MAIN advantage was not
balance so much as that the chassis was isolated from the potential
Hi Cortland:
One can also use a pair of probes known to be well balanced and take the
difference between the A and B channels, or
use a differential input accessory or plugin. There is then no possibility
of high-voltage on the instrument chassis.
Balance is really
Hi Xing Weibing:
2. supply the SMPS from an isolating transformer where
both supply conductors are isolated from ground.
3. connect secondary's ground and primary 's ground (neutral and ground
are connected together)
This is the correct connection for measuring the
for the primary circuit, and all measured
voltages are incorrect.)
Good luck!
Best wishes for the holiday season,
Rich
Hi Group
I have a question regarding working voltage measurement of IEC 60950
we have a E.U.T.(switching power supply)
I want to clarify
One can also use a pair of probes known to be well balanced and take the
difference between the A and B channels, or
use a differential input accessory or plugin. There is then no possibility of
high-voltage on the instrument chassis.
Cortland
(my own thoughts, and nor those of my employer)
.)
Good luck!
Best wishes for the holiday season,
Rich
Hi Group
I have a question regarding working voltage measurement of IEC 60950
we have a E.U.T.(switching power supply)
I want to clarify the measurement of working voltage
1. Using an oscilloscope having an adequate
Hi Group
I have a question regarding working voltage measurement of IEC 60950
we have a E.U.T.(switching power supply)
I want to clarify the measurement of working voltage
1. Using an oscilloscope having an adequate bandwith and using a high
impedance probe (100Mohm), and adequate
Hi Group
I have a question regarding working voltage measurement of IEC 60950
we have a E.U.T.(switching power supply)
I want to clarify the measurement of working voltage
1. Using an oscilloscope having an adequate bandwith and using a high
impedance probe (100Mohm), and adequate integration
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