Calibration Error

What does Calibration error mean?

The analog input bias and gain calibration values (C3, C4, C6, C7) have been set too close, potentially causing instability, inaccuracy, or an invalid range in analog input readings. This can lead to incorrect frequency commands or control signals, affecting system performance. The inverter output is not shut off.

• Incorrectly configured analog input calibration parameters (C3, C4 for input 1; C6, C7 for input 2) causing an invalid or excessively narrow range.
• Analog input source (e.g., pressure transducer, flow meter) providing an unstable or out-of-range signal during calibration.
• Electrical noise on the analog input wiring leading to erratic readings during the calibration process.
• Attempted calibration using a faulty sensor or reference signal.

Click steps to track your progress.

1. 1

   Review the datasheet for the connected analog sensor and the inverter's analog input specifications (e.g., 0-10V, 4-20mA).

2. 2

   Manually re-enter the recommended default calibration values for C3, C4, C6, and C7 as per the inverter manual.

3. 3

   Connect a verified, stable reference voltage/current source (e.g., calibration device) to the analog input terminals (e.g., terminal 2 for voltage, terminal 4 for current).

4. 4

   Re-perform the analog input calibration procedure according to the inverter manual, ensuring C3/C4 or C6/C7 values are appropriately spread (e.g., C3 set to '0' and C4 set to '1000' for 0-10V input).

5. 5

   Check the analog input signal at terminals (e.g., terminal 2-5 or 4-5) using a calibrated multimeter to confirm stability and range.