The calibrator is a portable tool for supplying current and measuring, which tests current circuits and measures DC voltage with various functions and ranges.
This manual introduces the 707 LOOP Calibrator, a pocket‑size device for supplying and measuring 0‑20 mA or 4‑20 mA current loops and DC voltages up to 30 V. It describes the supplied accessories, battery type, and basic functional blocks.
The document covers safety warnings, button functions, operating modes (Measure, Source, Simulate, Loop Power), automatic ramp output, accuracy specifications, general environmental limits, dimensions, weight, and part replacement procedures. This manual is written in Chinese.
| Voltage range | up to 30 V |
|---|---|
| Current range | 0 mA – 30 mA (max 30 mA) |
| Current resolution | 1 µA |
| Voltage resolution | 1 mV |
| Input impedance | 1 MΩ |
| Accuracy (voltage) | ±(reading) % |
| Operating temperature | -10 °C to +55 °C |
| Storage temperature | -20 °C to +70 °C |
| Maximum terminal voltage | 300 V |
| Dimensions (W × H × L) | ≈ 120 mm × 80 mm × 200 mm |
| Weight (with case) | ≈ 350 g |
Press the power button (marked /g68) while the device is off; the display shows the timer in minutes, and you can turn the knob to increase or decrease the shutdown time.
Hold the /g66 button together with /g67 (H) to enter the automatic ramp mode, then select the desired ramp type (slow, fast, or step).
Replace the 9 V alkaline battery promptly; the symbol /g77 indicates low battery energy.
The device is rated for a maximum of 300 V between any two terminals or between a terminal and ground.