21e37 – Working Voltage
*DRAFT INSTRUCTIONS
Due Date for Results: 10th April 2022
Result Entry will close at MIDNIGHT AUSTRALIAN EASTERN STANDARD TIME on the due date
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE COMMENCING
WARNING: Sample will be hazardous when energised. It is essential to take suitable precautions.
Introduction
Proficiency testing should be an accurate representation of each laboratory’s day-to-day operations.
Consequently, laboratories should treat this program in the same manner as a customer request and
follow its normal procedures for all aspects of their work. This includes contract review, safety
assessments, laboratory testing and the reporting of results.
Reference Standards and other Applicable Documents
The following standards and any associated published amendments apply.
IEC 60335-1
IEC 60745-1
IEC 61347-1
IEC 60598-1
IEC 61558-1
IEC 60065 (operating voltage)
IEC 62368-1
IEC 60950-1
IEC 61010-1
IEC 60601-1
AND ISO/IEC 17025
Previous editions of the above standards may be used after comparing with the above-cited
editions. Due to similarities in test procedures, other standards may be applicable. It is the
laboratory’s responsibility to compare their normal test procedure with the requirements of the
cited standards.
Sample Description
The supplied sample is a 25 W single input, single output switch mode power supply.
Test Conditions
Separate PT program entries are provided for 50 Hz and 60 Hz results.
Laboratories should submit results for both programs if they can generate both input voltage/
frequencies.
Table 1: Test Conditions
Input Voltage & Frequency
Output Voltage / Load
240 V 50 Hz
12 V DC / 1.5 A
120 V 60 Hz
12 V DC / 1.5 A
Test Instructions
1. The specified voltages are to be applied without any supply voltage tolerance.
2. Connect EUT with power source, conductor thickness (cross-sectional area) must be as close
as possible to 1.5 mm2.
3. Connect the EUT to a suitable laboratory power source with a TN-S network and turn it on.
4. Input and output conditions are given in Table 1.
5. Determine the highest working voltage of the EUT. Both primary and secondary circuit has to
be included in the evaluation.
6. Use the Circuit diagram ( given on page 3) as a guide.
7. Participants are allowed to remove the top casing to test the sample.
13 December 2021
©IFM Quality Services Pty Ltd
Page 1 of 4
21e37 – Working Voltage
*DRAFT INSTRUCTIONS
Due Date for Results: 10th April 2022
Result Entry will close at MIDNIGHT AUSTRALIAN EASTERN STANDARD TIME on the due date
Equipment Questions
Participants are required to answer the equipment questions given in Table 2.
Table 2: Equipment Questions
No.
Question
Definition
Reporting
Unit
E00
Sample ID
The ID is written on the IFM label on the box
E01
Power source
Report whether the supply is mains regulated or electronically
controlled.
E02
E03
E04
Source volt L-N
The voltage across L-N of the laboratory power source
Source volt L-G
The voltage across L-G of the laboratory power source
Source volt G-N
The voltage across G-N of the laboratory power source
Equipment type
Report the basic equipment type (e.g. multimeter, oscilloscope)
rms
used to measure r.m.s. voltage.
leave questions about multimeter blank if this type of equipment is not used
rms meter
The impedance of the equipment used for r.m.s. voltage
M Ohm
impedance
measurement
Multimeter true
Report if multimeter has true rms measuring function
Yes/No
rms function
Equipment type
Report the basic equipment type (e.g. multimeter, oscilloscope)
Multimeter/
peak
used to measure peak voltage
Oscilloscope
leave questions about multimeter/ oscillscope blank if this type of equipment is not used
Peak meter
The impedance of the equipment used for peak voltage
M Ohm
impedance
measurement
Class I /
Oscilloscope Type Report the type of oscilloscope
Class II /
Class III
Oscilloscope
Report the bandwidth of Oscilloscope
MHz
Bandwidth
Test Probe Type.
Report the test probe type used
Standard applied
IEC standard that was applied for this test.
E05
E06
E07
E08
E09
E10
E11
E12
E13
Regulated/
Electronically
controlled
Vrms
Vrms
Vrms
Multimeter/
Oscilloscope
Working Voltage Measurement
Table 3: Working Voltage Measurement
No.
Q01
Q02
Q03
Question
Working Voltage
rms
Working Voltage
peak
Measurement
Points
13 December 2021
Definition
Result
Report the maximum working voltage (rms)
Vrms
Report the maximum working voltage (peak)
Vpeak
Report points between which max. working voltage was measured.
©IFM Quality Services Pty Ltd
Page 2 of 4
21e37 – Working Voltage
*DRAFT INSTRUCTIONS
Due Date for Results: 10th April 2022
Result Entry will close at MIDNIGHT AUSTRALIAN EASTERN STANDARD TIME on the due date
Circuit Diagram
Reporting the Results
Results must be submitted on the IFM Result Entry Site
For information regarding the submission of results, please refer to the Result Entry Guide
Submit measured voltage waveform.
• All laboratories (Oscilloscope used) must submit clear picture(s)/ screen shot(s) of waveform
of the measured voltage.
• The quality of the photographs shall be such that all necessary features can be clearly
identified. Limit the file size to 5 Mb.
• The format of the files shall be PDF. Name the PDF file with unique IFM customer number
and program identifier in format;
“LogonID_ 21e37” (e.g. “C00000_21e37”) and email to support@ifmqs.com.au
13 December 2021
©IFM Quality Services Pty Ltd
Page 3 of 4
21e37 – Working Voltage
*DRAFT INSTRUCTIONS
Due Date for Results: 10th April 2022
Result Entry will close at MIDNIGHT AUSTRALIAN EASTERN STANDARD TIME on the due date
Due date
• Results will not be accepted via the online result entry facility after this date. Results
submitted after the due date will only be accepted upon payment of a late fee.
• If the due date is extended, this will be reflected via an update to the online result entry
facility.
After testing and reporting
Please retain the samples and test notes in the event a re-test or review is required. After the PTP,
these samples can be used as references and training tools by the laboratory.
Please direct questions or comments to: technical@ifmqs.com.au
13 December 2021
©IFM Quality Services Pty Ltd
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