FNIRSI HS-01 Soldering Iron Accessories


Product Details

Basic Specifications:

- Model Number: FNIRSI SG-004A

1. Current (mA):

- Range: 0~24mA

- Accuracy: ±(0.02%+0.003)

- Resolution: 0.001mA

- Load Resistance: 100Ω

2. Voltage (V):

- Range: 0~24V

- Accuracy: ±(0.02%+0.003)

- Resolution: 0.001mA (This might be an error. Should it be 0.001V instead?)

- Load Resistance: 500KΩ

3. Passive (XMT):

- Range: 0~24mA

- Accuracy: ±(0.02%+0.003)

- Resolution: 0.001V

- Load Resistance: 100Ω

4. 24V Loop:

- Range: 0~24mA

- Accuracy: ±(0.1%+0.005)

- Resolution: 0.01mA

- Load Resistance: 100Ω

5. Frequency (Hz):

- Range: 0~9999Hz

- Accuracy: ±2%

- Resolution: 5 digits

- Impedance: 1MKΩ

6. Millivolt (mV):

- Range: -10~100mV

- Accuracy: ±(0.03%+0.03)

- Resolution: 0.01mV

- Load Resistance: 2KΩ


Signal generator is a high-performance device aimed at the industrial control industry. It can handle various working conditions with one device. The device has a simple but stable appearance design, simple operation logic and powerful performance, and has been loved by consumers since it was launched. Support voltage, current, frequency, thermocouple and other signal mode output and input, support independent 24V power supply, programming mode, real-time curve, historical record, MODBUS communication, firmware upgrade and other powerful functions.

Display and Technology:

- 2.4-inch backlit color screen for clear display

Functionality and Features:

- Quantity Display Conversion: Convert signal to physical or engineering quantity values linearly corresponding, with adjustable ranges.

- Preset Values: Conveniently preset four commonly used signal values for rapid output adjustment.

- Signal Conversion: Transform input signals into output signals, facilitating conversion between various physical quantities.

- Programmable Output: Automatically adjust output size based on parameters, offering monotonic increasing, monotonic decreasing, or cyclic modes.

- Real-time Curve: Display input and output signal trends through customizable curves with adjustable sampling time.

- Modbus Slave: Establish communication with configuration software or PLC via RS485 for instrument setup.

- Historical Records: Record a specified amount of data for future reference or analysis.

- Firmware Upgrade: Easily update firmware using USB emulation, akin to a USB flash drive.

Connectivity and Power:

- Charging: 0-24V

- Built-in 3000mAh rechargeable lithium battery

- USB-C port for charging (5V-12V)

- Power Supply:

- Current (mA): 0-24mA

- Voltage (V): 0-24V

- Passive (XMT): 0-24mA

- 24V Loop: 0-24mA

- Frequency (Hz): 0-9999Hz

- Millivolt (mV): -10~100mV

- Various Thermocouples: See temperature ranges provided

- Resistance (ohm): 0-390Ω

- Pt100: -200~650℃

- Cu50: -20~150℃

Package Size:

- 1.18 x 0.79 x 0.39 inches 1.76 ounces

- 2.99 x 2.00 x 0.99 cm; 0.050 kg

Package Contents:

- FNIRSI SG-004A Signal Generator x1

- Test Pen x4

- Charging Cable x1

- User Manual x1

- Packaging Box x1


Warning Tips:

1. Electrical Safety:Always ensure that the device is used in accordance with electrical safety standards to prevent electric shock or damage to the equipment.

2.High Voltage: Exercise caution when working with high voltage signals. Make sure to use appropriate safety measures and protective gear to avoid injury.

3. Proper Grounding: Ensure that the oscilloscope is properly grounded to prevent electrical hazards and ensure accurate measurements.

4. Overloading: Avoid applying signals that exceed the specified input voltage range to prevent damage to the device.

5. Heat Dissipation: Allow the device to dissipate heat effectively by ensuring proper ventilation around the device during operation.

6. Firmware Updates: When performing firmware updates, ensure that the process is carried out correctly to avoid any potential disruptions or errors in the operation of the device.

7. Battery Usage: Follow the manufacturer's instructions for charging and using the battery to prevent overheating, fire, or explosion hazards.

8. Storage and Transportation: Store and transport the device carefully to prevent physical damage or exposure to extreme environmental conditions.

9. User Manual: Always refer to the user manual for proper usage instructions, safety precautions, and troubleshooting guidelines.

10. Maintenance: Regularly inspect and maintain the device to ensure optimal performance and safety. If any abnormalities are detected, discontinue use and seek professional assistance.

Customer Reviews

Based on 15 reviews
Dayna Franecki

Received the product OK .. in time and form .. working correctly .. very good quality and reliability .. seller super recommended ..

Zackery Jenkins

A very interesting device. Can generate and measure current at the same time (up to 20mA), Voltage (up to 25V), resistance (up to 3330ohm) and still convert from each other!
Readings only of positive signs;
Some details on the interface, but you can get around.
Slightly complex to operate and understand well what is being done, but with frequent use and attention, you can use well.

Piper Murazik

Good team. Works excellent. Thanks

Katelin Abernathy

Item as AD, fast delivery

Dane Stark

Very much the item was delivered super fast liked a lot



Please read our FAQs page to find out more.

Why can't the machine turn on after receiving it?

Please check whether the power cord is connected to the oscilloscope and whether the socket is providing power. If both are correct, please try replacing the mobile phone charging adapter and test it again. If the issue persists and the machine is still unable to start, please contact customer service for a replacement.

Why is there no waveform displayed during the test, with only one line remaining on the screen?

Please check whether the pause button has been pressed. If not, press the [Auto] button once. If the issue persists, it may indicate that the signal source has no signal output or there could be a problem with the probe line, such as a short circuit or an open circuit. Please use a multimeter to check whether the probe and signal source are functioning normally.

Why does the waveform run up and down when testing the signal, and why can't I see the waveform, only multiple online and offline beats?

Set the trigger mode to auto and then press the [auto] button once. If the issue persists, the probe's clamp may not be grounded or the probe's clamp end may be open circuit. Please check the probe's integrity with a multimeter.

Why would you measure a battery or other DC voltage without a waveform?

The battery voltage signal is a stable DC signal, devoid of a curved waveform. In DC-coupled mode, adjusting the vertical sensitivity results in an upward or downward offset straight line waveform. However, if AC coupling is employed, regardless of adjustment attempts, no waveform is observed.

Why is the peak value of Vpp more than 600 V, rather than 220 V or 310 V, when measuring the voltage waveform of the city power?

The city power's 220V is a symmetrical AC signal, with the positive peak voltage (maximum value) at +310V and the negative peak voltage (minimum value) at -310V. Therefore, the peak-to-peak value is 620V. The standard measurement parameter is the effective value, often denoted as the RMS value. At this standard, the voltage of 220V is referenced. However, the effective value of municipal voltage can fluctuate from 180V to 260V. Consequently, the peak Vpp falls within the range of 507V to 733V.

Didn’t find your answer?

Don't hestitate to contact us