Description
The MVT-50U Millivolt module will conªgure the XR440 Pocket Logger as follows:
Channel 1: Ambient Temperature.
Channel 3: 0-50mV Input (or Thermocouple Input).
Channels 2 and 4: ‘Standard’ channels, suitable for any Pace sensors, 0-5vDC or resistive inputs.
Mvt Modules – Common Specifications
| Operating Temperature | -40 to 60°C (-40 to 140°F) |
| Size | 41mm wide x 19mm deep x 14mm high |
| Overall Size with XR440 Data Logger | Adds 9mm to XR440’s overall length, no change to XR440’s height and width |
| Thermistor Sensor | ±0.1°C interchangeability, 0-70°C |
| Input Type | Single ended, (-) terminal is internally connected to dc ground |
| Input Impedance | Greater than 10 M ohm |
Note: The last letter of the model number (‘u’ or ‘b’) signifies unipolar or bipolar input.
Electrical Specifications
| Model | Mvt-50u |
| Range | 0-50 mV |
| Resolution (12 bit) | 12 µV |
| Offset Voltage | 5 µV max. |
| Offset Voltage Drift | 0.05 µV/ °C max. |
| Accepts Thermocouple | Yes |
| System Accuracy | 0.4% of F.S. |
Mvt-50u Thermocouple Specifications
| Type | Min Temp | Max Temp | Approx. Resolution |
| J | Ambient* | 760°C (1400°F) | 0.2°C (0.4°F) |
| K | Ambient* | 1220°C (2228°F) | 0.3°C (0.5°F) |
| N | Ambient* | 1300°C (2372°F) | 0.3°C (0.5°F) |
| R | Ambient* | 1760°C (3200°F) | 0.8°C (1.4°F) |
| S | Ambient* | 1760°C (3200°F) | 1.0°C (1.8°F) |
| T | Ambient* | 350°C (662°F) | 0.2°C (0.4°F) |
| B | Ambient* | 1820°C (3308°F) | 1.0°C (1.8°F) |
| C | Ambient* | 2320°C (4208°F) | 0.6°C (1.1°F) |
| E | Ambient* | 660°C (1220°F) | 0.15°C (0.3°F) |
| J ‘low’ | -130°C (-202°F) | Ambient* | 0.2°C (0.4°F) |
| K ‘low’ | -250°C (-418°F) | Ambient* | 0.3°C (0.5°F) |
| N ‘low’ | -50°C (-58°F) | Ambient* | 0.3°C (0.5°F) |
| T ‘low’ | -200°C (-328°F) | Ambient* | 0.2°C (0.4°F) |
| E ‘low’ | -100°C (-148°F) | Ambient* | 0.15°C (0.3°F) |
*Ambient temperature of Mvt-50u
Mvt-50u Thermocouple Limitation
The Mvt-50u must be set (in Pocket Logger Software) to read either high or low temperatures. When set for high temperatures, the low temperature limit is the ambient temperature of the Mvt Module. When set for low temperatures, the high temperature limit is the ambient temperature of the Mvt Module. The Mvt-11b and Mvt-22b do not have this limitation.