Overview
The Metrabyte D7382 MTHERM-20 is a 20-channel thermocouple input board designed for the METRABUS Industrial Data Acquisition and Control System. This versatile interface board provides reliable temperature measurement and monitoring across multiple industrial applications, making it an essential component for process control, thermal analysis, and equipment monitoring systems.
Key Features
- 20 differential input channels for simultaneous temperature monitoring
- 12-bit integrating A/D converter for high-resolution measurements
- 20-channel multiplexer for reliable signal switching
- DIP-switch selectable thermocouple types (J, K, T, R, S, B, E)
- Dual output format: degree Celsius or Fahrenheit
- Cold-junction compensation with millivolt measurement option
- Fully isolated to 500 VDC with 72 dB Common Mode Rejection
- Removable screw terminals (accepts 14 AWG or smaller wire)
- Switch-selectable signal filtering (four time constants)
Technical Specifications
- Part Number: D7382 / MTHERM-20
- Manufacturer: Metrabyte (Keithley)
- Input Channels: 20 differential
- A/D Resolution: 12-bit
- Thermocouple Types: J, K, T, R, S, B, E (DIP-selectable)
- Measurement Accuracy: 0.5°C
- Measurement Resolution: 0.1 to 0.8°C (range dependent)
- Voltage Isolation: 500 VDC fully isolated
- Common Mode Rejection: >72 dB
- Power Supply: +5 VDC @ 500 mA typical
- Input Ranges (Millivolt Mode): 0–76.4 mV, 0–25 mV, 0–15 mV, 0–5 mV
- Terminal Type: Removable screw terminals
- System Interface: METRABUS
Typical Applications
- Industrial process control and monitoring
- HVAC system temperature measurement
- Manufacturing equipment thermal supervision
- Data acquisition and logging systems
- Test and measurement automation
- Environmental chamber monitoring
- Multi-channel temperature data collection
Compatibility & Replacements
Compatible With
- METRABUS Industrial Data Acquisition and Control System
- Metrabyte / Keithley METRABUS mainframes and cabling
- METRABUS-compatible personal computers and controllers
- Systems supporting RS-232/422 serial communication
- Standard NEMA type enclosures and Keithley RMT-type enclosures
Replaces / Drop-In Replacement For
- Metrabyte MTHERM-20 (all revisions)
- Keithley MTHERM-20
- OEM replacement for Cincinnati Milacron C-2492-D-3049 assemblies
Works With
- METRABUS cabling and connectors
- Thermocouple probes (types J, K, T, R, S, B, E)
- METRABUS-compatible software and data acquisition drivers
- Industrial PC platforms with RS-232/RS-422 ports
