Appendix 1 Procedure for Investigating Power Supply Quality
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Appendix
By measuring power supply quality parameters, you can assess the power supply's quality and
identify the causes of various power supply malfunctions. The PW3198's ability to measure all
power supply quality parameters simultaneously makes this process a quick and simple one.
This appendix describes the power supply quality investigation process.
Check the following:
Appendix
Appendix 1 Procedure for Investigating Power
Supply Quality
Step 1: Identifying a clear objective
To assess power supply quality (power quality)
(There is no known problem with the power sup-
ply, and you simply wish to assess its quality.)
• Periodic power supply quality statistical inves-
tigations
• Testing after the installation of electric or elec-
tronic equipment
• Load investigation
• Preventive maintenance
1
To find the cause of a power supply malfunc-
tion
(You have discovered a power supply malfunc-
tion such as an equipment failure or malfunction
and wish to address it quickly.)
2
Go to Step 3.
Go to Step 2.
Step 2: Identifying the malfunctioning component (measurement location)
Where is the issue occurring?
• Principal electrical system
(Large copier, uninterruptible power supply, elevator, air compressor, air conditioning compressor, battery
charger, cooling system, air handler, time-controlled lighting, variable-speed drive, etc.)
• Electric distribution system
(Conduit [electrical conduit] damage or corrosion, transformer heating or noise, oil leak, circuit breaker
operation or overheating)
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When does the issue occur?
• Does it occur continuously, regularly, or intermittently?
• Does it occur at a specific time of day or on a specific day?
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