Overview
The ARTM-4 is an industrial-grade temperature inspection and control instrument designed for multi-channel temperature measurement. It supports up to 4 channels of Pt100/Pt1000 RTD inputs and is widely used for monitoring electrical contacts, motor windings, transformer windings, and other critical equipment in low-voltage distribution systems. It features high accuracy, flexible configuration, and convenient communication.
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Multi-channel Temperature Measurement
- 4 independent Pt100/Pt1000 inputs
- Individual channel enable/disable
- Wide range: Pt100 -99.9°C to 600°C
Flexible Alarm Configuration
- Two alarms per channel (high/low selectable)
- 4 relays freely assignable to any channel alarm
- Adjustable hysteresis and delay (0–100 cycles)
Integrated Communication & Analog Output
- RS485 with Modbus-RTU protocol
- 1 programmable 4-20mA analog output
- Baud rate 1200–19200 bps selectable
User-friendly Operation & Easy Installation
- Local LED display and keypad
- Password protection for settings
- Panel mounting with clear wiring diagram
Function
| Function | Description |
| Temperature Measurement | 4 channels Pt100/Pt1000, accuracy 0.5 level, resolution 0.1°C |
| Alarm Output | 4 sets of normally open relays, AC250V/5A, DC30V/5A |
| Analog Output | 1 channel 4-20mA, programmable temperature range |
| Communication | RS485, Modbus-RTU, baud rate 1200-19200 bps |
| Display | 4-digit LED, channel indication, status LEDs |
| Power Supply | AC85~265V or DC100~300V or DC12~30V, ≤2W |
| Operating Environment | -10°C~+55°C, humidity ≤95%, altitude ≤2000m |
Specification
| Parameter | Value |
| Channels | 4 |
| Sensor Type | Pt100, Pt1000 |
| Accuracy | Level 0.5 |
| Measurement Range (Pt100) | -99.9°C ~ +600°C |
| Measurement Range (Pt1000) | -99.9°C ~ +300°C |
| Alarm Outputs | 4 relays, NO, AC250V/5A, DC30V/5A |
| Analog Output | 1 channel, 4-20mA (programmable) |
| Communication Interface | RS485, Modbus-RTU |
| Baud Rate | 1200, 2400, 4800, 9600, 19200 bps |
| Power Supply | AC85~265V or DC100~300V or DC12~30V |
| Power Consumption | ≤2W |
| Display | 4-digit LED + status LEDs |
| Insulation Withstand | 2kV/1min AC |
| Operating Temperature | -10°C ~ +55°C |
| Storage Temperature | -25°C ~ +70°C |
| Humidity | ≤95% non-condensing |
| Altitude | ≤2000m |
| Mounting | Panel cutout (92mm×92mm) |
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Optional Accessories
- Spare mounting brackets
- 3-wire Pt100 sensors (various cable lengths)
- RS485 to USB communication converter
FAQ
Yes. The sensor type (Pt100 or Pt1000) can be selected in system settings.
It has 4 relay outputs, each can be assigned to alarm 1 or alarm 2 of any channel.
It uses Modbus-RTU protocol with selectable baud rates: 1200, 2400, 4800, 9600, 19200 bps.
Yes. Each channel can be independently set to “ON” or “OFF” to block unused channels.
Yes. For each channel, you can set the temperature values corresponding to 4mA and 20mA in the settings menu.
For best accuracy, a 3-wire Pt100 connection is recommended.
Summary
The ARTM-4 temperature monitoring instrument offers a complete solution for temperature supervision in low-voltage distribution and industrial equipment, featuring 4 flexible channels, high accuracy, reliable alarm outputs, and standard communication interfaces. Its simple HMI and easy installation make it ideal for both new projects and retrofit applications, enhancing operational safety and intelligence.
