ProMax CSG03 4-20ma Current & Voltage Signal Generator With Measuring

Specifications:

• Active current source output: 4-20mA typical. Max. 0-24mA, accuracy 0.01mA, max. load 750 Ω.
• Sink passive current output: 4-20mA typical; Max. 0-24mA, accuracy 0.01mA, external power supply max. 30V
• Voltage signal output: 0-5V/10V typical; max. 0-12V, accuracy 0.01V
• 24V output: Driving current is 24mA, have current loop display.
• Current input measuring: 0-24mA, accuracy 0.01mA
• Voltage input measuring: 0-30V, accuracy 0.01V
• Display mode: Colour LCD can display input, and output signals in one or dual interfaces.
• Output mode:  Automatic / Manual output: ascending, descending, cycling mode.
• Input to output switching: This can be voltage to current source mode, sink mode, current to voltage mode switching, and one button fast output.
• Additional output function: Customized output, user can set any min. output value and max. output value; current voltage signal conversion.
• Protection Circuit: Polarity reverse connection protection, over current protection, protection voltage 30V.
• Battery: 2000mAH large capacity rechargeable Li battery.
• Battery durability: 6 hours operating time at 20mA output.
• Port: Micro USB port for power supply and battery recharging.
• Operating Temperature: 0-50℃
• Size: 90x70x28mm

Features

• Generates User Adjustable 0 to 24mA Current and 0 to 12V Voltage Signal
• Can also measure both voltage and current signals for calibration and troubleshooting
• Multiple Display Screen Layouts for different applications
• Adjustable Current Output: 0-24mA source/sink signal output,0mA and 24mA Signals can be used to simulate Fault and Out of Range signals
• Adjustable Voltage Output: 0-12VDC, Fixed 24V output for device calibration
• Max Current And voltage: 0-23mA 0-30V input measurement.
• Internal polarity Reverse connection and Over current protection; Protection voltage 30V
• Inbuilt Rechargeable Battery, Micro USB Connector for charging
• Supports 2/3 wire 0-22mA sink or source signal 
• current voltage signal conversion functions included.
• 0.01mA, 0.01V accuracy for signal output and input measurement.
• 2000mAH 3.7V rechargeable inbuilt battery Battery Charge Indicator. USB Charging is available.
• Large clear colour LCD display input and output signal Displayed.
• Offers easy and convenient handheld operation
• Has one button fast output, automatic ascending, descending and cycling output mode.
• It can be used to generate preset time v/s current signal curves to simulate dynamic signals.

Applications

• Industrial Automation (PLCs): Simulating 4-20mA sensor data (pressure, temperature, flow) directly into Siemens, Allen Bradley, or Delta PLC analog input cards.
• Motor Control (VFDs): Generating precise 0-10V reference signals to calibrate Variable Frequency Drive speeds.
• HVAC Systems: Testing proportional damper actuators and chiller control valves.
• Process Calibration: Validating panel meters, chart recorders, and data acquisition (DAQ) systems in factories.
• Multifunctional Sensor Calibrator: Can be used to calibrate process display controllers and sensors working on 4 to 20mA or 0 to 12V voltage signals
• Multifunctional Sensor Simulator: Simulate multiple sensors for troubleshooting and debugging systems. Using this calibrator, engineers can identify the fault in the sensor, controller, or wiring by simulating sensor output signals and carrying out test procedures.
• Hand-Held Operation: Small enough to fit easily into a tool bag and to use in tight spaces. Runs an entire shift on a rechargeable Li-ion battery pack. Great for testing on the field.
• 2 operating modes:  Measure & Source (generate) —enable technicians to troubleshoot, calibrate, generate, and measure signals with just one tool

Package Includes:

• 1 x ProMax CSG03 4-20ma Current & Voltage Signal Generator With Measuring

Frequently Asked Questions (FAQ)

• What is the maximum output current of the ProMax CSG03?
  The device can generate up to 24mA, making it perfect for the standard 4-20mA range with headroom for over-range testing.
• Can this signal generator simulate a passive 2-wire 4-20mA transmitter?
  Yes, it fully supports passive simulation mode where it sinks current from an external 24V loop power supply.
• Does the CSG03 measure both voltage and current simultaneously?
  It features inputs to measure both, but you must select the specific measurement mode (V or mA) on the interface to view the live reading.
• Is the output isolated from the internal circuitry?
  While highly protected against reverse polarity and overcurrent, the outputs share a common ground (non-galvanically isolated).
• How accurate is the 0-10V output for VFD calibration?
  The output has a resolution of 0.01V with high precision, making it perfectly suitable for finely tuning VFD speed references.
• Can I use this to test proportional pneumatic valves?
  Yes, if the valve accepts a standard 0-10V or 4-20mA control signal, the CSG03 can drive it directly for bench testing.
• How long does the internal battery last on a single charge?
  Depending on the output load (e.g., driving a heavy 20mA signal continuously), the battery typically lasts between 6 to 10 hours of active field use.
• Can I charge the unit while actively generating a signal?
  Yes, it can be powered and charged simultaneously via the USB Type-C port, perfect for long-term bench testing.
• Does it support 0-20mA or 0-22mA output ranges?
  Yes, the current output is fully adjustable from 0.00mA all the way up to 24.00mA.
• Can I program a custom signal sweep curve?
  This model features automatic stepping and continuous output modes, allowing you to sweep between values automatically to test system response.
• How do I switch between active and passive current loop generation?
  This is selected directly via the push-button menu interface on the front panel.
• Is the display clearly visible in bright outdoor environments?
  Yes, it uses a high-brightness TFT color LCD that remains readable in standard industrial and outdoor lighting.
• What happens if I accidentally reverse the polarity on the input terminals?
  The device features built-in reverse polarity protection to prevent immediate catastrophic damage, but correct wiring should always be verified.
• Can it measure a 24V loop power supply directly?
  Yes, the voltage measurement input can safely read DC voltages up to 30V.
• Is there a way to quickly jump between standard preset values (e.g., 4mA, 12mA, 20mA)?
  Yes, the device has quick-step functionality that allows you to jump between common setpoints for rapid calibration.
• Does the unit have a built-in 24V power supply for loop testing?
  Yes, the generator can provide the active 24V excitation required to power and read standard passive sensors directly.
• What is the input impedance when measuring voltage?
  It features a high input impedance to ensure it does not load down or alter the circuit you are actively measuring.
• Will this device work for calibrating load cell amplifiers?
  If the load cell amplifier outputs a standard 0-10V or 4-20mA signal, you can use the CSG03 to measure and verify its output perfectly.
• How do I calibrate the CSG03 if it starts drifting over time?
  The device features an internal software-based calibration menu allowing you to adjust the zero and span if you have a highly precise reference meter.
• Does it retain the last used output value after a power cycle?
  Yes, you can configure it to remember the last state so it powers up exactly where you left off.