Operating Manual for Fnirsi 003A Multi-functional Signal Generator

Quick guide from the manual

The Fnirsi 003A is a multi-functional signal generator designed for testing and debugging industrial equipment. Key operations include switching signal types, configuring output parameters, and monitoring real-time curves. Always ensure the input terminal voltage does not exceed 30Vpp to prevent equipment damage.

Interface Terminal

The device features four 4mm wiring ports on the top:

• Output+ (Red): Used for signal output.
• Output- (Black/COM): Common ground for output.
• Input- (Blue/24V): Alternate function; can be switched to an independent 24V test power supply. Internally shorted to COM in input state.
• Input+ (Yellow): Used for signal input.

Button Panel Introduction

The device uses a 3-key and 5-key area with color-coded LED backlights to indicate modes:

• White: Manual setting mode.
• Green: Preset output mode.
• Blue: Programming mode.
• No light: Conversion mode.

The FN button acts as a shift key to toggle between default and secondary functions for other keys.

Wiring Instructions

The device supports various configurations for PLC, process instruments, and pneumatic valves. When testing two-wire transmitters, the (IN-) port can be configured as a 24V power supply to provide the necessary loop voltage.

Fault Resolution

• No response: Check battery charge level and charging indicator.
• Abnormal screen: Verify screen connection.
• Abnormal values: Check signal lines, interface selection, and ensure parameters are within the specified technical range.
• Input/Output errors: Note that input and output are not isolated, which may cause minor errors.

Equipment Maintenance

The device is powered by a 3000mA lithium battery. It is not waterproof; avoid high humidity, dust, direct sunlight, and unstable environments. Use the provided Type-C port for charging.