FNIRSI SG-003A Signal Generator Product Manual

FNIRSI SG-003A Signal Generator Overview

The FNIRSI SG-003A is a compact, handheld signal generator designed for various electronic testing and measurement applications. The device features a clear display screen and an intuitive button layout for easy operation. Key controls include: SET/ALT, ESC/OUT, A/M, ON/OFF, FN, and CONVERT/RESET, along with directional buttons for navigation and value adjustment. It includes dedicated ports for COM, OUT, PWM, and IN signals.

Catalog

1. Product Parameter
2. Powered by
3. Wiring port
4. Wiring diagram
5. Manual interface
6. Automatic interface
7. VC conversion interface
8. PWM interface
9. Key operation of system settings
10. Other settings
11. NOTE

1. Product Parameter

• 1.1 Automatic Output Function: The voltage and current have an automatic output function, allowing selection of single rise, single drop, and three circulation modes.
• 1.2 Input to Output Conversion: Supports voltage conversion active current mode, passive mode, and current conversion voltage mode.
• 1.3 Custom Output Function: The upper and lower output limits can be set arbitrarily.
• 1.4 Language Support: Chinese, Traditional Chinese, and English languages can be switched freely.
• 1.5 Input Diagrams: Voltage input diagram, current input diagram, with a frame rate of 10 frames.
• 1.6 Power Supply: Powered by a large-capacity lithium battery, charged via a Type-C interface (5V).
• 1.7 Use Environment: 0°C~50°C.
• 1.8 Size: 92mm × 72mm × 30mm.

2. Powered by

The device is powered by a 3000mA large-capacity lithium battery. A visual representation of battery status shows a full battery (yellow bar) and a low battery (red bar, less than 20%).

Charging: Use the Type-C interface to charge. The indicator light is on when charging and turns off after full charge. A toggle switch is used to power the machine ON/OFF.

3. Wiring port

The device features four main wiring ports:

• IN: Input positive level (cannot be reversed).
• PWM: PWM output terminal (When PWM is not turned on, it is directly connected to OUT or IN, depending on relay selection).
• OUT: Positive output.
• COM: Input, output, negative GND of PWM.

4. Wiring diagram

Detailed wiring configurations for various applications:

① Active current output: voltage output

A diagram shows a connection from the device's COM, OUT, PWM, IN ports to a Meter or PLC, with a positive connection from the device to the Meter/PLC.

② No source output

A diagram illustrates connections from the device's COM, OUT, PWM, IN ports. An input positive connection leads to a Vacuity-output-24V line, which then connects to a Passive Output (XMT) for digital display, PLC, isolation safety grid, and other equipment.

③ 24V loop

A diagram depicts connections from the device's COM, OUT, PWM, IN ports to a Transmitter, with a positive connection from the device to the Transmitter.

④ Output: self-supplied

A diagram shows connections from the device's COM, OUT, PWM, IN ports to a Meter or PLC, with a positive connection from the device to the Meter/PLC.

⑤ PWM external supply

A diagram illustrates connections from the device's COM, OUT, PWM, IN ports. A positive connection from the device goes to an External power supply, which then connects to a Meter or PLC.

⑥ Current input; Voltage input

A diagram shows connections from the device's COM, OUT, PWM, IN ports to a Sensor, with a positive connection from the device to the Sensor.

Port Definitions:

• COM: Input, output, negative GND of PWM.
• OUT: Output positive.
• PWM: PWM output terminal.
• IN: Input positive.

5. Manual interface

The manual interface displays IN Vol. (00.00V), IN mA (00.00mA), and Vol. OFF (00.00%). It also shows options like L Vol., Manu, OFF, and Shift. This is the main interface for programmable output of 0-15V/0-24mA voltage and current.

The input waveform interface displays OLT Vol DFP (00.00) and allows switching between input current graph display and input voltage graph display.

5.1 Interface description

When the FNIRSI SG-003A is not set, there are four interfaces: manual interface, PWM interface, VC conversion interface, automatic interface, and input waveform interface.

5.2 Button description in non-setting state

When the instrument is not in the setting state:

• The “ON/OFF” key controls the output switch.
• Press the “FN” key to switch the “FN” color.
• When the FN key is red, press the “SET” key to enter the setting interface.

5.3 Manual interface button operation (when the FN button is white)

• 5.3.1 ALT key: Switches between input current graph display, input voltage graph display, and combined input voltage and current display.
• Note: To measure the input voltage, users must switch to the input waveform interface. Refer to the notes for details.
• OUT button: Can switch between active current output, passive current output, voltage output, and 24V loop output.
• 5.3.2 Up, down, left and right keys: For all outputs except the 24V loop output, these four buttons set the output value (Up and down keys support long press).

5.4 Non-setting interface key operation (need to press the FN key at the same time)

• 5.4.1 Up button: Enters the PWM interface.
• 5.4.2 Down button: Enters the VC interface.
• 5.4.3 Left button: Enters the automatic interface.
• 5.4.4 Right key: Enters the manual interface.

5.5 Custom setting parameter description

• 5.5.1 Custom output: Controls whether to open the upper and lower output limits.
• 5.5.2 Active 20mA lower limit: The lowest value of the output active current.
• 5.5.3 Active 20mA upper limit: The highest value of the output active current.
• 5.5.4 Passive 20mA lower limit: The lowest value of passive output current.
• 5.5.5 Passive 20mA upper limit: The highest value of passive current output.
• 5.5.6 0~15V lower limit: The lowest value of the output voltage.
• 5.5.7 0~15V upper limit: The highest value of the output voltage.

5.6 Supplementary description of custom setting parameters

Percentage of output = (upper limit - lower limit) × 100%

5.7 Pre-set settings

The preset setting can be switched to active 20mA setting, passive 20mA setting, or 0~15V setting through the “ALT” key, “FN” key, or up and down keys. Press the “▶” key or right key to enter the setting item. Press the “ESC” key or the left key to return to the system settings.

5.8 Description of preset setting parameters

• 5.8.1 Upper preset: Manual interface, the preset value of the upper key (when the FN key is red).
• 5.8.2 Lower preset: Manual interface, preset value by the next key (when the FN key is red).
• 5.8.3 Left preset: Manual interface, left-click preset value (when the FN key is red).
• 5.8.4 Right preset: Manual interface, right preset value (when the FN key is red).

6. Automatic interface

The automatic interface displays IN Vol. (00.00), IN mA (00.00mA), Vol. OFF (00.00), and Cycle T (000.0%). It shows options like L Vol., AUTO, OFF, and Shift. Automatic mode can be set for single ascent, single drop, and loop operations.

6.1 Automatic interface button operation

• 6.1.1 OUT key: Switches active current output, passive current output, voltage output.
• 6.1.2 Up button: Turns on the output (cycle once).
• 6.1.3 Down button: Automatic output reset.
• 6.1.4 Right click: Output pause.

6.2 Auto set (Automatic setting)

Automatic settings can be accessed via the “ALT” key, “FN” key, or by switching between up and down keys to select active 20mA setting, passive 20mA setting, or 0~15V setting. Press the “▶” key or right key to enter the setting item. Press the “ESC” key or the left key to return to the system settings.

6.3 Automatic setting parameter description

• 6.3.1 Auto. Mode: Can be set to single ascending (UP), single descending (DO), and Cycle. Cycles (Cycle T): 0 for unlimited times, 9999 is the maximum number.
• 6.3.2 Initial value (Initial): Value at the beginning of each cycle mode.
• 6.3.3 Incremental value (INC. Value): The value to be increased each time.
• 6.3.4 Decrement value (DEC. Value): The value to be decreased each time.
• 6.3.5 Increment time (INE. Time): The time between each increment.
• 6.3.6 Decrement time (DEC. Time): The time between each decrement.
• 6.3.7 Starting point delay (S.Delay): The delay time at the initial value.
• 6.3.8 End delay: Delay time at the end value.
• 6.3.9 End value (E. Value): The value at which the loop mode ends each time.

6.4 Supplement to the description of automatic setting parameters

• 6.4.1 Single ascending (UP): The initial value is compared with the end value; the relatively small one is the starting value, the relatively large one is the end value. The hold will not automatically close when the ascent mode reaches the end value.
• 6.4.2 Single descending (DO): In descending mode, the initial value is compared with the end value; the relatively small is the starting value, the relatively large one is the end value. When the falling mode reaches the end value, the hold will not automatically close.

7. VC conversion interface

The VCA conversion interface displays IN Vol. (00.00V), IN mA (00.00mA), and VCA CON OFF (00.00mA). It also shows options like L Vol., VCA CON, OFF, and Shift. This interface allows switching voltage to active current, voltage to passive current, and current to voltage.

7.1 VC interface button operation

OUT key: Switchable voltage is converted into active current, voltage is converted to passive current, and current is converted to voltage.

7.2 Signal conversion setting parameter description

• 7.2.1 VC Con.: Open or close, controls whether to open VC conversion.
• 7.2.2 Con. Mode: Select voltage conversion active current mode, passive current mode, and current conversion voltage mode.
• 7.2.3 V ULlimit: The lowest value of the output voltage after conversion.
• 7.2.4 V DLlimit: The highest value of the output voltage after conversion.
• 7.2.5 mA ULimt: The lowest value of current output after conversion.
• 7.2.6 mA Dlimit: The highest value of current output after conversion.
• 7.2.7 Over ran (range): Open or close, controls if the input or output is higher than 100%.

7.3 Signal conversion setting parameter description supplement

• 7.3.1 Output voltage = input current / (current upper limit - current lower limit) × (voltage upper limit - voltage lower limit) + voltage lower limit.
• 7.3.2 Output current = input voltage / (upper limit of voltage - lower limit of voltage) × (upper limit of current - lower limit of current) + lower limit of current.
• 7.3.3 Even if the overrange is turned on, the input and output cannot exceed the maximum range of the instrument.

8. PWM interface

The PWM interface displays IN Vol. (00.00V), OUT Vol. (00.00V), Duty (050%), and Freq (007.K 000Hz). It shows options like L Vol., PWM, OFF, and Shift. This interface allows setting the output PWM signal, voltage, frequency, and duty cycle.

8.1 Button operation on the PWM interface (when the FN button is white)

• 8.1.1 OUT key: The frequency can be set to 45, 90, 180KHZ.
• 8.1.2 Up, down, left and right keys: Set the value of the voltage output through these four buttons (Up and down keys can be long pressed).

8.2 PWM interface button operation (when the FN button is red)

• 8.2.1 OUT key: Controls the relay, switches the PWM amplitude (PWM will affect output or input).
• 8.2.2 Up, down, left and right keys: Use these four buttons to set the duty cycle and frequency values (Up and down keys can be long pressed).

8.3 PWM frequency accuracy description

Since the PWM is generated by the internal hardware of the microcontroller, its accuracy is affected by 72Mhz/100 and the MOS tube. The set frequency should be divisible by 720,000 for higher accuracy; otherwise, the accuracy deviation will be greater.

9. Key operation of system settings

Note: How to enter the system settings? Press the “FN” key to switch the “FN” color. When the FN key is red, press the “SET” key to enter the setting interface.

The system settings interface displays options such as Auto Set, Sig. Cnv., Custom Set, Other Set, and Presetting.

9.1 Key operation instructions of the system setting interface

• 9.1.1 “ALT” key: Move up.
• 9.1.2 “ESC” key: Exit system settings.
• 9.1.3 “FN” key: Move down.
• 9.1.4 “▶” key: Confirm & enter.

9.2 In the system settings interface, Key operation instructions for entering the next level of settings

• 9.2.1 “ALT” key: Move up.
• 9.2.2 “FN” key: Move down.
• 9.2.3 “ESC” key: Exits the current interface & enters the confirm modification interface.
• 9.2.4 Up and down keys: Set the value of the parameter.
• 9.2.5 Left and right keys: Switch parameter counting unit (move left and right).

9.3 Confirm to modify the interface button operation instructions

• 9.3.1 “ALT” key, “ESC” key/up and down keys: Move up and down.
• 9.3.2 “▶” key: Confirm selection.

10. Other settings

10.1 Description of other setting parameters

• 10.1.1 Restore factory settings (Factory Reset): Formats all stored data.
• 10.1.2 Voltage map height: Every 0.01V of the voltage map height = “voltage map height” pixels.
• 10.1.3 Current map height: Every 0.01mA of current map height = “current map height” pixels. For example, if it is 4.00mA, and the “current graph high” is 0.05, in the image, it is 400 × 0.05 = 20, y = the 20th pixel on the Y axis.
• 10.1.4 Battery voltage (Electric): The battery power is directly read as battery voltage. Battery voltage = “Battery voltage” × AD value.
• 10.1.5 Language settings (Language): Chinese, Traditional Chinese, and English.
• 10.1.6 System output voltage (System vol.): Voltage selection when outputting active current, high voltage or low voltage.
• 10.1.7 Screen backlight (Scre. light): Sets the screen brightness to 0~100%.
• 10.1.8 Button backlight (Butt. light): Sets the button backlight brightness to 0~100%.
• 10.1.9 Key tone (Key Voice): Sets the volume of the tone.
• 10.1.10 Success sound (Succ. voice): Sets the prompt sound for successful button operation.
• 10.1.11 Failure sound (Fail. voice): Sets the prompt sound of button operation failure.
• 10.1.12 Long press speed (Even speed): The up and down keys have a long press function. Sets the speed of the long press for these two buttons; the larger the value, the slower the speed.

11. NOTE

11.1 Read this manual carefully before use.

11.2 Exceeding the product parameter range during use may cause temporary abnormal operation of this instrument, or even completely damage it.

11.3 The equipment uses itself to detect the signal sent out by itself, and there will be a large error.

11.4 Supplement to other setting parameter descriptions: Modify all parameters carefully.

11.5 If the user needs to measure the input voltage, they must switch to the input voltage waveform interface. Connecting the two ends of the circuit under test in parallel on the main interface for voltage measurement will cause damage.

The product package typically includes the FNIRSI SG-003A signal generator, a carrying case, a set of test leads with alligator clips, a Type-C USB charging cable, and a wall adapter.