Thermocouple / Millivolt Modules

Mvt-11b Thermocouple / Millivolt Module for the XR450 Data Logger

Thermocouple / Millivolt Module

Two Millivolt modules enable the XR440 or XR450 Data Logger to read a millivolt signal on channel 3.  One module, the Mvt-50u accepts a thermocouple (Type J, K, N, R, S, T, B, C, or E).  A built-in precision thermistor on channel 1 provides ambient temperature readings and thermocouple cold junction compensation.  An Mvt module configures the XR450 as follows:  Ambient temperature on channel 1.  Millivolt (or thermocouple if Mvt-50u) signal on channel 3.  Channels 2 and 4 are 'Standard' channels and will accept Pace sensors, 0-5 Vdc or resistive signals. 

Mvt Modules - Common Specifications

Operating Temperature -40°C to 60°C (-40°F to 140°F)
Size 1.61" wide x 0.75" deep x 0.55" high (41mm x 19mm x 14mm)
Overall Size with XR450 Data Logger Adds 0.35" (9mm) to XR450's overall length, no change to XR450'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 Mvt-500u
Range 0-50 mV 0-500 mV
( 12 bit )
12 uV 120 uV
Offset Voltage 5 uV max. 5 uV max.
Offset Voltage Drift 0.05 uV/ °C max. 0.05 uV/ °C max.
Accepts Thermocouple Yes No
System Accuracy 0.4% of F.S. 0.4% of F.S.

Part Numbers:  (2 models)  Mvt-50u, Mvt-500u

Price:  (either model)  $140.

Thermocouple Specifications for 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.

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

PT450 Thermocouple Probe

XR450 Data Logger

pdf icon XR450 Catalog and Domestic Price List

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