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TTI-7 High-Accuracy PRT and Thermocouple Thermometer.
The TTI-7 is a very high accuracy multi purpose digital thermometer for both platinum resistance thermometers and thermocouples. Laboratory users will welcome the features to eliminate Thermal EMF
Errors and Self Heating Errors along with provision to store the calibration data of up to 20 PRT probes.
The rugged aluminum case, internal battery pack and integrated power supply ensure reliable portable field use for demanding measurement applications all at great value.
Dual Channel input allows a probe on Channel B to be calibrated against a standard on Channel A - directly compare any combination of PRT and Thermocouple.
The TTI-7 supports ten thermocouple Types, B,C, D, E, J, K, N, R, S and T and Pt100 thermometers.
Connect up to 16 sensors via the optional switchboxes, Model 954 and 958.

PRT and Thermocouple Thermometer

Model  Description 
TTI 7  TTI 7 PRT/RTD and Thermocouple Thermometer

Accuracy to 0.01°C -0.001°C.
Resolution (Pt100 Inputs).
PRT and Thermocouple Inputs.
Eliminate Unwanted Thermal EMFs with current reversal.
Store 4000 Measurements.
PC Interface and Software Included, RS232.
Portable 10 Hours Use from Internal Battery.

Why the TTI-7? The TTI-7 has the features you need for high accuracy temperature measurement.
With resistance thermometers used at high temperatures unwanted thermal EMFs are generated,
the TTI-7 can take two measurements switching the polarity then computing the average to eliminate
this error source. Many other instruments lack the ability to eliminate thermal EMFs.
The thermal EMF error can be greater than the quoted accuracy of an instrument, if you need small
measurement uncertainty for high-temperature PRT work you need this feature.

The TTI-7 Uncertainty of Measurement (1 Year) in the range -100°C to 500°C is 0.01°C.
Watch for specifications that quote the value at -100°C and then get larger as the temperature rises.
The TTI-7 is optimized over the most frequently used temperature range.
For thermocouple measurements the automatic CJC is far better than 0.1°C at 20°C.
Great design care was taken, both thermocouple inputs are measured with separate Pt100 sensors.
This approach gives outstanding CJC performance.
Thermometer specification
Temperature Range  -200 to 2315°C, depending on Sensor  
Accuracy   to 0.01°C  
Resolution (Pt100 Inputs)  -0.001°C  
Inputs  PRT and Thermocouple
Thermocouples via sub miniature and standard connectors. 
Indicator Units  °C, °F, K 
Display  LCD Graphics Panel, 240 x 64 Dot with LED backlight contrast
control via keyboard  
Maths  Display Min / Max, Peak to Peak and Standard Deviation  
PC Interface  RS232 and Software Included  
Data Logging  Includes a data logging function, enabling up to 4000 single
channel (2000 dual channel) readings to be stored together
with a date and time stamp.  
Working Temperature  0°C to 40°C relative humidity, 80% max non-condensing  
Storage Temperature  -20°C to +50°C  
Main Supply  110 VAC ±10% (50 / 60 Hz) 40VA  
Dimensions  110.3mm x 219mm x 315mm (HxWxD)  
Weight  17.6 lbs (8kg)  
Battery  Sealed lead acid, rechargeable cell giving approximately 10 hours
continuous operation. Internal battery charger.