YOKOGAWA CW500 Power Quality Analyzer

Core functions and technical parameters

1. Measurement function and scope

Measurement parameter range/range accuracy (typical values)

Voltage (RMS) 600.0V/1000V ± 0.2% reading ± 0.2% range (sine wave, 40~70Hz)

Current (RMS) 2A~3000A (depending on clamp probe) ± 0.2% reading ± 0.2% range+probe accuracy

Active power 2000W~3000kW ± 0.3% reading ± 0.2% range (power factor=1, sine wave)

Frequency 10.00~99.99Hz ± 2dgt (40~70Hz, V1 range 10%~110%)

Harmonic (1~50 times) THD 0.0%~100.0% complies with IEC61000-4-30, Class 3 accuracy

Flashing Pst (short-term) and Plt (long-term) comply with IEC61000-4-15, with a reading of ± 10%

2. Data recording and storage

Record interval: adjustable from 1 second to 30 minutes, supporting manual/continuous/timed recording modes.

Storage media: Built in 4MB flash memory (used without SD card), 2GB SD card (default accessory), saved in CSV format, supports PC analysis later.

Event recording: Automatically record events such as sudden rise, sudden drop, interruption, transient overvoltage, surge current, etc. The trigger threshold can be customized (such as a sudden rise threshold of 110% of the rated voltage).

Common Problems and Maintenance

1. Troubleshooting

Possible causes and solutions for the fault phenomenon

If there is no response when starting up, the battery is dead or the installation is reversed. If the power cord has poor contact, replace the battery and confirm the polarity. Check the power cord connection

No measurement data, probe not connected properly, wiring error, improper range setting. Reconnect the probe, check the terminal color and wiring diagram, and confirm that the range covers the measured value

SD card cannot be read, unformatted, damaged, poor contact. Format SD card on the instrument (SETUP → Save → Format), replace SD card

Record if the SD card is full or the battery is low, delete useless data or replace the SD card, connect to AC power or replace the battery during the recording process

2. Daily maintenance

Calibration cycle: It is recommended to calibrate once a year. You can contact the authorized service center of Yokogawa or refer to the "User Calibration Manual" on the official website for self calibration (standard calibration source is required).

Probe maintenance: Regularly check whether the insulation layer of the probe is damaged and whether the metal end is oxidized; The voltage probe crocodile clip needs to be cleaned to ensure good contact.

Instrument cleaning: Wipe the outer shell with a dry soft cloth and avoid using corrosive solvents such as alcohol and gasoline; If there is dust in the terminal area, it can be blown clean with compressed air.