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Solutions Search - Thermocouple Solutions

LTC2984 Thermocouple Measurement with Automatic Cold Junction Compensation

Jun 17th 2015
The LTC®2984 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2984 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold ...

Circuit 

 

LTC2983 Thermocouple Measurement with Automatic Cold Junction Compensation

Nov 10th 2014
The LTC®2983 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2983 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold ...

Circuit 

 

How To Make A Thermocouple Meter With The LTC2492

Mark Thoren - Staff Scientist Sep 15th 2008
This video explains how to use the 24-bit LTC2492 2-channel delta-sigma analog-to-digital converter with Easy Drive Input Current Cancellation to make thermocouple measurements. The ADCs features and benefits are discussed, as is cold junction compensation; this is followed by a lab demonstration of the LTC2492 thermocouple ...

Video 

 

LTC2485 Complete Type K Thermocouple Measurement System (I2C) with Cold Junction Compensation

Sep 6th 2005
The LTC2485 is ideal for direct digitization of thermocouples and other low voltage output sensors. The input has a typical offset error of 500nV (2.5μV max) offset drift of 10nV/°C and a noise level of 600nVRMS. The only signal conditioning is a simple surge protection network. In any thermocouple meter, the cold junction ...

Circuit 

 

Type K Thermocouple Signal Conditioner with ±190V Protection from Accidental Contact and Cold Junction Compensation

Aug 16th 2005
Thermocouple wires are intended to be electrically floating in order to detect temperature by producing the Seebeck voltage created by two dissimilar metals. This small voltage is amplified to an easily measurable level by an amplifier. To protect the input terminals of the amplifier in the event that the thermocouple is shorted ...

Circuit 

 

Complete Type K Thermocouple Measurement System (SPI) with Cold Junction Compensation

May 6th 2005
The LTC2484 is ideal for direct digitization of thermocouples and other low voltage output sensors. The input has a typical offset error of 500nV (2.5μV max) offset drift of 10nV/°C and a noise level of 600nVRMS. The only signal conditioning is a simple surge protection network. In any thermocouple meter, the cold junction ...

Circuit 

 

RTD and Thermocouple Remote Temperature Digitizer

Apr 1st 2004
The LTC2449 is commonly used with thermocouples and RTDs as shown in this circuit. Thermocouple outputs produce very small changes (tens of microvolts per degree C) and the output will be negative if the thermocouple is colder than the “cold junction” connection from the thermocouple to the copper traces on the PCB. The ...

Circuit 

 

Type K Thermocouple 10mV/°C Thermometer with Positive Output

Dec 9th 2003
The LT1025 is a micropower thermocouple cold junction compensator for use with type E, J, K, R, S, and T thermocouples. It utilizes wafer level and post-package trimming to achieve 0.5°C initial accuracy. Special curvature correction circuitry is used to match the “bow” found in all thermocouples so that accurate ...

Circuit 

 

LTC2057 Differential Thermocouple Amplifier

Dec 9th 2003
The LTC2057 is a high voltage, low noise, zero-drift operational amplifier that offers precision DC performance over a wide supply range of 4.75V to 36V or 4.75V to 60V for the LTC2057HV. Offset voltage and 1/f noise are suppressed, allowing this amplifier to achieve a maximum offset voltage of 4μV and a DC to 10Hz input ...

Circuit 

 

LTC6081/LT1025 Type K Thermocouple Signal Conditioner with ±350V Protection from Accidental Contact and Cold Junction Compensation

Dec 9th 2003
A high input impedance amplifier permits the use of large valued input resistors and retains signal accuracy. This is very useful for protecting both the amplifier and cold junction compensator in thermocouple applications as the sense element can often be inadvertently connected to destructive voltage potentials. The 1MΩ ...

Circuit 

 

Pseudodifferential Multichannel Bridge Digitizer and Digital Cold Junction Compensation

Mar 15th 2000
This circuit enables pseudodifferential measurements of several bridge transducers and absolute temperature measurement. Consecutive readings are performed on each side of the bridge by selecting the appropriate channel on the LTC2428. Each output is digitized and the results digitally subtracted to obtain the pseudodifferential ...

Circuit 

 

Single Supply Type K Thermocouple Signal Conditioning Amplifier with Cold Junction Compensation

Nov 23rd 1999
The LTC2050 is a zero-drift precision chopper stabilized operational amplifier available in the 5- or 6-lead SOT-23 and SO-8 packages. It minimizes board area while providing uncompromising DC performance, including 3mV (max) DC offset and 30nV/°C (max) DC offset drift. It operates from a 2.7V supply while still supporting ...

Circuit 

 

High Resolution Battery-Powered Robust Type K Thermocouple Signal Conditioning Amplifier with Cold Junction Compensation

Nov 23rd 1999
The circuit is used as a plug-in adapter for common digital multimeters and is completely portable. This circuit employs the LT1025 thermocouple compensator to improve accuracy over a wide range of ambient conditions and is mounted close to the thermocouple connection points for optimal thermal tracking. It precludes the need ...

Circuit 

 

High Resolution Type S Thermocouple Digitizer with Improved Cold Junction Compensation

Sep 16th 1998
This simple interface circuit that demonstrates the practicality of direct thermocouple connection to the LTC2400 using low output voltage thermocouples (a Type S thermocouple, as shown, produces a full-scale output voltage of 18mV). This circuit uses the LT1025, a micropower thermocouple cold junction compensator, to sense ...

Circuit 

 

Pilot Light Flame Detector with Low-Battery Lockout using a Type R Thermocouple

Sep 22nd 1997
The LTC1541 combine a micropower amplifier, comparator and bandgap reference in an 8-pin package. The part operates from a single 2.5V to 12.6V or dual ±1.25V to ±6.3V supply with a typical supply current of 5µA. Both the op amp and comparator feature a common mode input voltage range that extends from the negative supply ...

Circuit 

 

Micropower Thermocouple Signal Conditioner with Cold Junction Compensation

Jan 1st 1987
A thermistor, shown as R3, is used to monitor the cold junction temperature. Its resistance becomes smaller as the cold junction temperature increases. An increase in cold junction temperature will reduce the output voltage of the Type J thermocouple by 52uV/C. The voltage reference and scaling of resistor values creates an ...

Circuit 

 

Linearized Platinum Resistance Thermometer with ±0.025°C Accuracy Over 0 to 100°C

Nov 1st 1983
The LT1001 significantly advances the state-of-theart of precision operational amplifiers. In the design, processing, and testing of the device, particular attention has been paid to the optimization of the entire distribution of several key parameters. Consequently, the specifications of the lowest cost, commercial temperature ...

Circuit