ProMax Milivolt Signal Generator mV Simulator

Specifications:

• Power supply input: 5-24VDC
• Output range: -10.00mV to 100.00mV.
• Accuracy/Error: ±0.5%
• Adjusting accuracy: 0.01mV
• Max. power consumption: 1W
• Pulse counts: 20 pulses p/1 turn rotation
• Auto-save function: Yes, auto-save in case of power off or press the down knob to save parameters
• Display: 4-digit clear LED tube
• Output controlling accuracy: ±0.01mV
• External dimension(L x W x H): 79.5x42x24mm
• Panel Cut-out size: 77*40mm (±1mm error)
• Weight: 50g

Features:

• 0.01mV adjusting step, accuracy is ±0.5%.
  Wide range power supply: DC5-24V.
• Standard panel-mounted shell with LED display.
• Use an accurate encoder to adjust output.
• Pluggable wiring terminal blocks make users easy to connect wires.
• Have polarity reverse connection protection in power supply terminals.

Applications

• Load Cell Simulation: Simulating strain gauge bridges for weighing scale calibration.
• Thermocouple Emulation: Injecting specific mV values to test temperature controllers and PID loops.
• PLC & SCADA Diagnostics: Verifying analog input modules (AI) on Siemens, Allen-Bradley, and Delta PLCs.
• Data Logger Calibration: Validating the data acquisition accuracy of remote IoT sensor nodes.

Virtual Technician & Wiring Guide

• ⚠️ SAFETY WARNING: This is a low-voltage signal generator. NEVER connect the output terminals to live AC mains or power sources exceeding the rated input voltage (typically 30V DC maximum). Doing so will instantly vaporize the internal precision op-amps.

Standard Pinout Configuration:

• V+ / 24V: Connect to positive DC power supply (Check manual for 5V vs 24V compatibility).
• GND / 0V: Connect to power supply ground.
• OUT+ (Signal): Connect to the positive analog input terminal of your PLC/Controller.
• OUT- (Signal GND): Connect to the analog ground/common terminal of your PLC/Controller.

Package Includes

• 1 x ProMax Milivolt Signal Generator mV Simulator

Frequently Asked Questions (FAQ)

• What is the exact output range of this mV simulator?
  It typically covers standard process mV ranges like 0-20mV, 0-100mV, and up to 1000mV depending on the selected mode.
• Can it simulate a 4-20mA signal?
  No, this specific model is a dedicated Millivolt (mV) simulator. For 4-20mA, check out our ProMax Current Signal Generators.
• Is this suitable for testing K-type thermocouples?
  Yes, it can inject the precise mV equivalent of a specific temperature to test how your controller reads a K-type thermocouple.
• How accurate is the output dial?
  The unit features a high-precision rotary encoder allowing for fine adjustments with an accuracy of ±0.2%.
• Can I use this to test my Arduino ADC?
  Absolutely. It provides a much cleaner and stable reference voltage than a simple potentiometer voltage divider.
• Does it require an external power supply?
  Yes, it requires an external DC power supply. Most industrial models run on 12V-24V DC, while some support 5V USB.
• Can I mount this on a control panel?
  Yes, the housing is designed for easy snap-in or screw mounting on standard electrical cabinet panels.
• Does the output drift over time?
  Thanks to high-quality internal op-amps, thermal drift is minimal, making it suitable for extended diagnostic sessions.
• Can it simulate a load cell for a weighing scale?
  Yes, by generating the tiny mV signals expected from a strain gauge, you can calibrate scale indicators without applying physical weights.
• What happens if I short the output terminals?
  The device has basic short-circuit protection, but prolonged shorting to ground or voltage sources should be avoided to prevent thermal damage.
• Is the display backlit?
  Yes, the LED/LCD display is backlit for high visibility in dark industrial cabinets.
• How do I change the mV value quickly?
  The rotary encoder typically supports slow turning for fine adjustment (0.01mV) and fast turning or pushing for coarse jumps (1mV).
• Does this measure incoming mV signals too?
  No, this is strictly a signal generator (source), not a multimeter (sink/measure).
• Can I use this with an ESP32 or Raspberry Pi?
  Yes, you can use it to feed highly accurate, small voltage signals into their respective ADCs or external ADC modules like the ADS1115.
• Are the terminal blocks removable?
  Most ProMax models feature pluggable terminal blocks so you can wire them comfortably before plugging them into the unit.
• Does it have memory to save a specific output value?
  Yes, it typically saves the last set value upon power-off, so it boots up exactly where you left it.
• What is the maximum load resistance it can drive?
  As a voltage source, it is designed to drive high-impedance inputs (like PLC analog cards). It should not be used to drive heavy loads.
• Is this isolated?
  Standard models are non-isolated. If you require galvanic isolation for safety, ensure your PLC input card has built-in isolation.