The FNIRSI SG-004A is a high-precision, multifunction process calibrator. It is designed for engineers who need to do more than just simple loop testing. With its ability to simulate and measure Thermocouples (8 types) and RTDs (Pt100/Cu50), it is the go-to tool for thermal processing, chemical plants, and advanced automation labs. The large colour screen even provides a Real-time Trend Curve, allowing you to monitor signal stability over time.
Source & Measure Simultaneously: The screen is split into two halvestop for output (Source) and bottom for input (Measure).
Massive Signal Support: Handles DC Voltage, DC Current, Frequency, Pulse, PWM, Resistance, plus various Thermocouples and RTDs.
Real-time Graphing: Automatically converts signals into a trend curve, making it easy to spot jitters or drifts in a system.
Programmable Output: Set up Auto-Step or Slope outputs to test how a valve or motor reacts to a gradual increase in signal.
Engineering Unit Conversion: Dont do math in your head! Convert $4-20ext{mA}$ signals directly into $0-100\%$ or any custom scale.
USB-C Interface: Fast charging and firmware updates to keep your tool current with the latest industrial standards.
| Signal Type | Output Range (Source) | Input Range (Measure) |
| Current (mA) | 0 24 mA | 0 24 mA |
| Voltage (V) | 0 24 V | 0 24 V |
| Passive Current | 0 24 mA (External Power) | N/A |
| PWM / Freq | 0 9999 Hz | 0 9999 Hz |
| Thermocouple | K, E, J, T, R, B, S, N | K, E, J, T, R, B, S, N |
| RTD | Pt100, Cu50 | Pt100, Cu50 |
| Accuracy | pm(0.01\% + 0.005) | pm(0.01\% + 0.005) |
Instrumentation Engineers: Calibrate temperature controllers and transmitters on-site.
DCS/PLC Programmers: Simulate complex sensor data to verify HMI scaling and alarms.
HVAC Technicians: Test and calibrate dampers and thermostats using PWM or resistance modes.
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