1. Current Sensor Application Notes
Mark Shelton/Mikael Hammar

2. Calibration procedure allows for a set point unique for each fan or pump

3. Will not detect mechanical failures such as belt loss

4. Current Switch Applications
Note: each turn adds the current value of one turn to the total sensed current
In the pictured example the conductor passes through the sensor 4 times. The conductor caries a current of 0.5A. Therefore the effective sensed amperage is 2.0A (4x0.5A)

5. Current Switch Applications

6. Current Transducer Applications
Note: Calculations are different depending on output type. Types available 0-5VDC, 0-10VDC or 4-20mA. Calculations are also dependent on the selected amperage range (most models offer switch selectable ranges).

7. Current Transducer Applications
Note: Calculations are different depending on output type. Types available 0-5VDC, 0-10VDC or 4-20mA. Calculations are also dependent on the selected amperage range (most models offer switch selectable ranges) and the primary amperage rating of the 5A CT.

8. 4-20mA Wiring Examples

9. Using the Zero and Span to Calibrate the H221/H321 Products

10. Using the Zero and Span to Calibrate the H221/H321 Products

11. Using the Zero and Span to Calibrate the H221/H321 Products