OOTDTY SG-002 ±12V/0-24mA Voltage and Current Source Signal Generator
Technical Index
- External power supply DC15-30V power 1w (not charging)/4W (charging); 1.2 3.7V lithium battery capacity 1100mAh, maximum charging current 0.6A (optional);
- External micro USB-5V current 0.2A (not charging)/0.8A (charging);
- The voltage output is adjustable from ±12V, the accuracy after calibration is 0.05V, and the maximum current is 20mA;
- The current output is adjustable from O-24mA, the accuracy after calibration is 0.05mA,The current sampling resistance is not more than 500 ohms;
- The digital tube displays 4 digits, two decimal places;
- Encoder knob 1 circle: 30 pulses;
Power Supply 
3 power supply methods, as long as one is used, it can work, and it can be connected at the same time;
Battery indicator status:
| Battery indicator | green | yellow | Red | Flashing | Green does not
flash |
| Battery
status |
Electricity≥80% | 80%≥Electricity≥40% | 40%≥Electricity | recharging。。。 | Brimming |
Complementary: Hold down“MODE” key 1 second The digital tube flashes for 5 seconds to display the actual battery voltage。
Dimensions 
Wring Diagram 
Note:
- Commonly used active modes such as PLC inverter servo valves, passive mode is used for special controllers, and 24V is required for output.
- It is the internal resistance of the device, we don’t need to connect it again.
How to judge whether it is active or passive connection? Common methods are as follows:
- See the internal schematic document of the device， I+ is 24V+ it is the passive connection； I- is 24VG it is the active connection；
- Use a multimeter to measure the voltage between I+ and I-， =0V is the active connection， =24V is the active connection；
Voltage/Current switching
Press the MODE button, one key switch to adjust the voltage and current mode The indicator shows what state it is in System operation corresponds to which mode to operate The original mode after switching, Will continue to output It’s just not in a state of adjustment；
System Option(Where“OK<confirm key>” is: Push the knob down, Turn clockwise to “+<ADD>”, Anticlockwise rotation”-<reduce>”):
In the normal operation screen, short press the confirm key to saving the output value After letting go Screen display”…”, Successfully saved, After the next boot,The output value is this saved value When debugging equipment， We need to randomly adjust the output value，Just don’t press the encoder knob， After restarting, the original value will be saved；
Parameter settings：
- In the normal operation screen, Press and hold the confirm button for seconds, Enter settingstate Display”F001”(Parameter number 001);
- Turn the knob to change the parameter number (First entry F002 Need to enter the password first“+ – – + （Rotate the knob）”)；6.2.3 Parameter number interface，
- Press the confirm key to enter the corresponding parameter value setting Rotate the knob to modify the parameters；
- Parameter number interface Press the confirm key to enter the corresponding parameter value setting Rotate the knob to modify the parameters；
- Rotate the knob directly to the last parameter number, press the OK key, the setting is completed and enter the normal operation screen;
- If there is no operation on the parameter setting screen for more than 10s, it will exit the setting state and enter the normal operation screen;
- For example:
- Modify “F001” coarse and fine adjustment;
- Figure 1→2: Press and hold the knob for 2 seconds Enter setting state，Display “F001”;
- Figure 2→3: Press “OK” Set the value of “F001″设，Turn the knob to modify it；
- Figure 3→4: Press “OK” Exit the setting state after saving Enter the normal；
Modify “F006” calibration value 
- Figure 1→2: Press and hold the knob for 2 second Enter setting state Display“F001”
- Figure 2→3: “+”1 Pulse，Display“- – – -”；
- Figure 3→4: Enter password“+ – – +”，Display“= = = =”；
- Figure 4→5: Press “OK”, if the password is entered correctly, it will display “F002″Or “F100”, otherwise it will display “Err” to exit, there may be an error, please enter it again;
- Figure 5→6: Rotate the knob “+” to display to“F006”；
- Figure 6→7: Press “OK”,Enter to set the parameter value of “F006”, Then modify this value to make the actual output equal to -10V or 4mA Figure 7→ : Press “OK” to save, or automatically exit the setting state after 10s of inactivity, and the parameters will not be saved;
- In the voltage regulation mode, enter the voltage setting, parameter description table：
Serial number Description Remark Default F001
Coarse adjustment or fine adjustment 0:Coarse adjustment，1:fine adjustment，2:Shortcut mode（Need to be set firstF100>0） 0
F002
Output mode
0:±12V，1:±5V，2:0–10V，3:2–10V，4:0–5V， 5:1-5V，6:0-3.3V，7:0-2.5V，8:0-1V，
9:-10-0V
0
F003
Display mode
0:Actual voltage， 1:percentage0-100.0， 2:50HZ， 3:0-1500 0
F004
Coarse adjustment mode plus and minus value/each pulse 1-50 plus and minus figures for each pulse, no decimal point concept (1-50) x 10 1
F005
fine adjustment mode plus and minus value/each pulse 1-50 plus and minus figures for each pulse, no decimal point concept (1-50) x 10 1
F006 Output calibration value –10V
-999 — +999 Internal reference only， Please be cautious when modifying F007
Output calibration value 0V -999 — +999 Internal reference only，Please be cautious when modifying F008
Output calibration value 10V -999 — +999 Internal reference only，Please be cautious when modifying F009 Digital tube brightness 1-8: Level 1 is the darkest, level 8 is the brightest 1 F100 Quick output points 0:Quick output mode is not used， 2-9:Points
0 F101…F109 9-point output value Range -12V to +12V How many points are there how many values can be set
In the regulation current mode, Enter the current setting,parameter description table:
| Serial number |
Description |
Remark |
Default |
|
F001 |
Coarse adjustment or fine adjustment |
0:Coarse adjustment，1:fine adjustment，2:Shortcut mode（Need to be set firstF100>0） |
0 |
| F002 | Output mode | 0:0-20mA， 1:4-20mA ，2:0-24mA | 0 |
|
F003 |
Display mode |
0: Actual current, 1: percentage
0-100.0, 2: 50HZ |
0 |
|
F004 |
Coarse adjustment mode plus and minus value/each pulse | 1-50 plus and minus figures for each pulse, no decimal point concept
(1-50) x 10 |
1 |
|
F005 |
fine adjustment mode plus and minus value/each pulse | 1-50 plus and minus figures for each pulse, no decimal point concept
(1-50) x 10 |
1 |
|
F006 |
Output calibration value 4mA |
-999 — +999 Internal reference only，Please be cautious when modifying | |
|
F007 |
Output calibration value 12mA |
-999 — +999 Internal reference only，Please be cautious when modifying | |
|
F008 |
Output calibration value 20mA |
-999 — +999 Internal reference only，Please be cautious when modifying | |
|
F009 |
Digital tube brightness | 1-8: Level 1 is the darkest, level 8 is the brightest |
1 |
|
F100 |
Quick output points |
0:Quick output mode is not used，
2-9:Points |
0 |
|
F101…F109 |
9-point output value |
Range 0-24mA How many points are there how many values can be set |
Current output test method: AIo GND
We often encounter people who say that there is no current when measuring current. In fact, the ammeter is broken, the gear is wrong or the wrong hole is inserted. There is a fuse inside the multimeter to measure the current. This is easy to blow, so we use the method of voltage measurement. Verify the transition of the signal generator as follows:
- The simplest method: power on, directly measure the voltage between AIo and GND when there is no load, =0V is defective, otherwise, 99% may be no problem because when there is voltage to measure current, it is equivalent to short circuit and there will definitely be current:
- Connect an LED indicator, if the brightness changes with the adjustment, then the signal generator current output is no problem; 7.3 Connect a 50-300 ohm resistor to AIo GND. If there is voltage and it meets “Voltage = Current X Resistance”, the voltage will change with the adjustment, then the signal generator current output is no problem;
- If there is a PLC/inverter, measure the resistance between I+ and I-. If it is between 50-300 ohms, you can use it as a test resistance. Connect AIo to I+, GND to I-, and measure the voltage. If there is voltage, and Satisfy “Voltage = Current X Resistance”, the voltage will change with the adjustment, then the signal generator current output is no problem;
NOTE:
- Please read this manual carefully before use；
- Turn off the power before wiring
- Exceeding the range shown in the technical indicators may cause the instrument to work abnormally or even be damaged
Documents / Resources
 |
OOTDTY SG-002 ±12V/0-24mA Voltage and Current Source Signal Generator [pdf] User Manual SG-002, 12V-0-24mA Voltage and Current Source Signal Generator, Current Source Signal Generator, Signal Generator, SG-002, Generator |
