Interfaces, amplifies, filters input voltages from B-type thermocouple

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Interfaces, amplifies, filters input voltages from B-type thermocouple

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Isolated, Thermocouple Input 3B37
Interfaces, amplifies, filters input voltages from B-type thermocouple. High accuracy internal cold junction compensation. Module provides simultaneous precision voltage current outputs. Current output withstands 130V without damage. 3B37 series modules mix-and-match Swappable.
APPLICATIONS
Industrial signal conditioning Industrial signal isolation Industrial signal filtering
Figure 3B37 Functional Block Diagram
PRODUCT OVERVIEW
Series Signal Conditioning Subsystems provide low-cost, versatile method transferring analog transducer signals data acquisition, monitoring control system without inherent noise, non-linearity, drift extraneous voltages. modules designed directly accept analog signals from Thermocouples, RTD's, Strain Gages, Torque Transducers, Frequency Transducers, LVDTs, millivolt process current signals. modules amplify, isolate, linearize convert transducer output signals standardized analog inputs high-level analog subsystems. Series Subsystem consists relay rack with universal mounting backplane family plug-in rack) input output signal conditioning modules. Eight four channel backplanes also available. Each backplane incorporates screw terminals sensor inputs current outputs 26-pin connector high-level singleended voltage outputs user's equipment. input modules feature complete signal conditioning circuitry optimized specific sensors analog signals provide simultaneous high-level analog outputs: +10V +10V) 4-20 0-20 mA).
Output modules accept +10V +10V) single-ended signals provide isolated 4-20 0-20 process signal. modules feature universal pin-out readily hot-swapped under full power interchanged without disrupting field wiring. Analog Devices Series Signal Conditioning Subsystem designed easily handle signal conditioning problems measurement control applications. Some typical uses microcomputer-based data acquisition systems, programmable controllers, analog recorders, dedicated control systems, other applications where monitoring temperature, pressure, flow analog signals required. Since each input module features simultaneous outputs, voltage output used provide input microprocessor-based data acquisition control system while current output used analog transmission, operator interface, analog backup system. Each input module single-channel signal conditioner which plugs into socket backplane accepts signal from input screw terminals. input modules provide input protection, amplification filtering input signal, accuracy +0.1%, drift uV/oC (low-level input modules), feature high-level analog outputs that compatible with most process instrumentation. isolated input modules also provide +1500 peak isolation. choice specific module depends upon type input signal. Input modules available accept millivolt, volt, process current, thermocouple, RTD, strain gage, frequency LVDT inputs. voltage output each module available from sysem connector while current output available output screw terminals.
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Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties that result from use. Specifications subject change without notice. license granted implication otherwise under patent patent rights Analog Devices. Trademarks registered trademarks property their respective companies.
Technology Way, P.O. 9106, Norwood, 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.326.8703 2004 Analog Devices, Inc. rights reserved.
3B37 GENERAL DESCRIPTION
3B37 single-channel signal conditioning module that interfaces, amplifies filters input voltages from B-type thermocouple provides isolated simultaneous voltage current outputs linear with input voltage. High accuracy internal cold junction compensation predictable upscale open circuit indication provide complete signal conditioning solution. accurately measure level signals electrically noisy environments, +1500 peak galvanic transformer-based isolation with common mode rejection (CMR) 50/60 normal mode rejection (NMR) 50/60 provided. current output withstands without damage interfaces user equipment through screw terminals located Series backplane. This plug-in, mix-and-match, hot-swappable module easily field calibrated front-panel zero span adjustments both voltage current outputs. Accurate System Ready Internal cold-junction compensation largely corrects errors arising from parasitic thermocouples formed thermocouple connection input screw terminals, providing accuracy +0.5oC over +5oC +45oC ambient temperature range. module generates predictable upscale signal indicate open thermocouple; downscale response, connect 47M, 0.25 Watt resistor across screw terminals Series backplane Series Custom Ranging Program Externallyprogrammable version Model 3B37-X-00, enable user configure special input range using optional plug-on AC1310 ranging card, which houses user-supplied resistors determine zero span. facilitate selecting resistors, Windows program, 3B-Custom, calculates resistor values based user-desired input/output ranges.
Inside 3B37 Module chopper-stabilized low-drift input amplifier assures stable long-term stability. amplifier input, zero-scale input voltage subtracted from input signal zero-scale value. user convenience, zero span optionally factory configured meet custom needs (Model 3B37-CUSTOM) externally programmed (Model 3B37-X-00) user-supplied resistors inserted optional AC1310 plug-on ranging card. Zero suppression exceed 100% input range. This enables suppression zero-scale input value amny times larger that total span precise expanded-scale measurements selection portion input signal. differential input circuit field side fully floating, eliminating need input grounding. Signal isolation transformer coupling users proprietary modulation technique linear, stable reliable performance. demodulator computer side signal transformer recovers original signa, which then filtered buffered provide low-noise, low-impedance output voltage, this output also drives voltage-to-current (V/I) converter provide simultaneous current output interfacing versatility.
Figure
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3B37
3B37 Models Available
Model 3B37-X-00 3B37-J-01 3B37-K-02 3B37-T-03 3B37-E-04 3B37-R-05 3B37-S-05 3B37-B-06 3B37-Custom
Input Type Type Type Type Type Type Type Type Type Type
Input Range Externally Programmable -100°C +100°C (-148°F +1400°F) -100°C +1350°C (-148°F +2462°F) -100°C +400°C (-148°F +752°F) +900°C (+32°F +1652°F) +1750°C (+32°F +3182°F) +1750°C (+32°F +3182°F) +1800°C (+32°F +3272°F)
Output Ranges1
Output current range user programmed using jumper supplied. Requires AC1310 ranging card. Custom Input/Output ranges available. Refer configuration guide.
3B37 Specifications
(typical +25°C Power) Description Input Ranges Standard Ranges Custom Ranges Refer Model Table ±500 Output Ranges Voltage Current 850)
Model 3B37
Accuracy2
Maximum Current Output Span
Initial +25°C Nonlinearity
±0.1% Span Sensor Error ±0.01% Span Stability Temperature
Voltage Output Zero Span Current Output3 Zero Span Zero Span Adjustment Range
±0.02°C/°C Reading/°C
Span/°C Reading/°C Span
Cold Junction Compensation (CJC) Initial Accuracy +25°C
±0.5 ±0.5°C (±0.0125°C/°C)
Accuracy Temperature, +5°C +45°C Input Bias Current
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3B37
Input Resistance Noise Input, Bandwidth Output, Bandwidth Bandwidth, Output Rise Time, Span Open Input Response Open Input Detection Time Upscale seconds Common-Mode Voltage (CMV) Input-to-Output, Continuous Transient ±1500 peak, maximum ANSI/IEEE C37.90.1-1989 Common Mode Rejection (CMR) Source Imbalance, 50/60 Normal Mode Rejection, 50/60 Input Protection Continuous Transient Voltage Output Protection Current Output Protection maximum ANSI/IEEE C37.90.1-1989 Continuous Short Ground rms, continuous Power Supply Voltages Supplies Rated Operation Current Sensitivity Loop Supply Rated Operation Current Sensitivity Mechanical Dimensions lout ±0.0002% span/V 3.15" 3.395" 0.775" (80.0 86.2 19.7 Environmental Temperature Range Rated Performance Storage Relative Humidity, hours Susceptibility
±(11.5 16.5 ±0.01% span/V
-25°C +85°C -55°C +85°C +60°C noncondensing ±0.5% Span error MHz, Watt,
range, typical minimum output current Includes combined effects repeatability, hysteresis, nonlinearity. With respect voltage output. wide range custom zero suppression span available with 3B30-00 3B31-00 models, using AC1310 ranging card. When used with temperature sensor provided Series backplane. loop power required driving current output loads 850. current output load less applied, sufficient loop power. only voltage output used, loop power required.
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3B37 CONFIGURATIONS FUNCTIONAL DESCRIPTIONS
Figure 3B37 Input Field Connections
Table Function Descriptions-
Description
Figure Model Series Module, with pin-out assignments.
CAUTION
(electrostatic discharge) sensitive device. Electrostatic charges high 4000 readily accumulate human body test equipment discharge without detection. Although this product features proprietary protection circuitry, permanent damage occur devices subjected high energy electrostatic discharges. Therefore, proper precautions recommended avoid performance degradation loss functionality.
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3B37 OUTLINE DIMENSIONS
Figure Outline Dimensions
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3B37 NOTES
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3B37 NOTES
2004 Analog Devices, Inc. rights reserved. Trademarks registered trademarks property their respective companies. D01116-0-9/04(0)
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Interfaces, amplifies, filters input voltages from B-type thermocouple

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