CKSR15-NP - LEM

CKSR15-NP Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  A symmetrical layout with a ground plane underneath the sensor and a low-impedance path for the primary current conductor is recommended. Keep the sensing loop as small as possible and avoid routing high-frequency signals near the sensor.
• How does the sensor behave in high-temperature environments?
  The CKSR15-NP is rated for operation up to 125°C, but its accuracy and linearity may degrade above 100°C. Consider derating the sensor's output and using thermal compensation techniques for high-temperature applications.
• What is the effect of external magnetic fields on the sensor's accuracy?
  External magnetic fields can affect the sensor's accuracy. To minimize this effect, use a mu-metal shield or a ferrite core around the sensor, and keep it away from strong magnetic sources like motors or transformers.
• Can I use the CKSR15-NP for AC current measurement?
  Yes, the CKSR15-NP can be used for AC current measurement, but it's essential to consider the frequency response and bandwidth of the sensor. The sensor's bandwidth is typically limited to a few hundred kHz, so it may not be suitable for high-frequency AC applications.
• What is the recommended calibration procedure for the CKSR15-NP?
  Calibration involves applying a known current to the primary conductor and measuring the output voltage. Use a high-accuracy current source and a precision voltmeter to calibrate the sensor. Repeat the process at multiple current levels to ensure linearity.