The JOFRA ASC301 is a portable advanced signal calibrator that handles electrical, pressure and temperature calibration.
The ASC301 is a portable multi‑function signal calibrator designed for field use with one‑hand operation. It provides laboratory‑grade accuracy for electrical signals, pressure and temperature, and can be paired with the optional APM pressure module or temperature probe for expanded capabilities. The device features a full‑digital keypad, ClearBrite™ display, and built‑in over‑voltage protection up to 250 VAC.
The unit runs on four AA batteries or an external 9 VDC supply, and includes optional accessories such as a portable soft case, charging kit, and calibration software (JOFRACAL) for data logging and report generation. Detailed specifications cover a wide range of input/output types, including 14 RTD types, 13 thermocouple types, current (0‑24 mA), voltage (0‑20 V), resistance (5‑4000 Ω), frequency (0‑10 kHz), and pressure modules with 17 selectable units. This manual is written in Chinese.
| Over‑voltage protection | 250 VAC |
|---|---|
| Current input range | 0 – 24 mA DC |
| Voltage input range | 0 – 20 V DC |
| Frequency range | 0 – 10 kHz |
| Resistance range | 5 – 4000 Ω |
| RTD types supported | 14 |
| Battery type | 4 × AA |
| Dimensions (main unit) | 235 × 53 × 95 mm |
| Weight (with battery) | 590 g |
The ASC301 supports 14 different RTD types.
Yes, it can run on four AA batteries or an external 9 VDC supply.
Yes, it provides over‑voltage protection up to 250 VAC.