Calibration guide for Ohio Semitronics CTR series true RMS current transducers, covering setup, zero adjustment, calibration, and linearity checks.
This manual provides step-by-step instructions for calibrating Ohio Semitronics CTR series true RMS current transducers. It includes details on required test equipment, connection diagrams, zero and calibration adjustments, and linearity verification procedures. The document also specifies model-specific output options and accuracy tolerances.
Calibration is performed using an AC sine wave current source and precision measuring instruments. Adjustments are made via trimpots accessible through the lid. The manual includes tables for verifying linearity and lists recommended calibration equipment from Ohio Semitronics and third-party vendors. This manual is written in Chinese.
| Frequency Range | 48 to 420 Hertz |
|---|---|
| Accuracy | ±0.25% of full scale (except CTR-005*Y34 and CTR-010*Y34: ±0.5% @ 60Hz) |
| Output Options | Option B: 0 to 1mAdc; Option D: 0 to 10Vdc; Option E: 4 to 20mAdc; Option X5: 0 to 5Vdc |
| Instrument Power | 120 volts AC (standard); 220 volts AC (option -22) |
The transducers measure true RMS values over an operating range of 50 to 400 hertz.
You must apply instrument power and allow the transducer to warm up for 15 minutes.
You should calibrate the transducer at the frequency at which it will be used.