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OM-USB-TEMP-AI

8 Channel

Temperature/Voltage Measurement 

USB Data Acquisition Module

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User’s Guide

Extended Warranty

Program

SM

Содержание OM-USB-TEMP-AI

Страница 1: ...m e mail info omega com For latest product manuals omegamanual info OM USB TEMP AI 8 Channel Temperature Voltage Measurement USB Data Acquisition Module Shop online at User sGuide Extended Warranty Pr...

Страница 2: ...Managed by the United Kingdom Office Toll Free 0800 466 342 TEL 33 0 161 37 29 00 FAX 33 0 130 57 54 27 e mail sales omega fr Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany Toll Free...

Страница 3: ...ng the OM USB TEMP AI 10 Chapter 3 Signal I O Connections 11 Screw terminal pin out 11 Voltage input terminals V0H V0L to V3H V3L 12 Sensor input terminals T0H T0L to T3H T3L 12 Current excitation out...

Страница 4: ...T0x T3x 24 Semiconductor sensor measurement accuracy T0x T3x 25 RTD measurement accuracy T0x T3x 25 Thermistor measurement accuracy T0x T3x 26 Absolute Accuracy V0x V3x 27 Settling time V0x V3x 28 An...

Страница 5: ...u avoid injuring yourself and others damaging your hardware or losing your data Angle brackets that enclose numbers separated by a colon signify a range of numbers such as those assigned to registers...

Страница 6: ...s The sensor category is software programmable for each channel pair Thermocouple types J K R S T N E and B Resistance temperature detectors RTDs 2 3 or 4 wire measurements of 100 _ platinum RTDs Ther...

Страница 7: ...strated in the block diagram shown here Figure 1 OM USB TEMP AI functional block diagram Software features For information on the features of InstaCal and the other software included with your OM USB...

Страница 8: ...s to position DIP switches to set or interrupts to configure You can connect the OM USB TEMP AI before or after you install the software and without powering down your computer first When you connect...

Страница 9: ...our OM USB TEMP AI and information regarding installation of that software Please read this booklet completely before installing any software or hardware Unpacking the OM USB TEMP AI As with any elect...

Страница 10: ...hould turn back on Configuring the OM USB TEMP AI All hardware configuration options on the OM USB TEMP AI are programmable with software Use InstaCal to set the sensor type for each temperature chann...

Страница 11: ...ew terminals two rows on the top edge of the housing and two rows on the bottom edge Each row has 26 connections Between screw terminals 10 and 11 is the integrated CJC sensor used for thermocouple me...

Страница 12: ...l connections When making connections to the screw terminals be sure to tighten the screw until tight Simply touching the top of the screw terminal is not sufficient to make a proper connection Voltag...

Страница 13: ...current excitation source and I2 is the current excitation return for channel 2 and channel 3 Four wire two sensor common terminals 4W01 and 4W23 The 4W01 and 4W23 terminals are used as the common con...

Страница 14: ...mocouples are attached to conductive surfaces the voltage differential between multiple thermocouples must remain within 1 4 V For best results we recommend the use of insulated or ungrounded thermoco...

Страница 15: ...which is the sum of the thermistor resistance and the lead resistance Two wire configuration The easiest way to connect an RTD sensor or thermistor to the OM USB TEMP AI is with a two wire configurat...

Страница 16: ...ing the second channel T H T L This configuration compensates for any lead wire resistance and temperature change in lead wire resistance Connections to T H for the first channel and T H T L of the se...

Страница 17: ...ted to obtain proper measurements Semiconductor sensor measurements Semiconductor sensors are suitable over a range of approximately 40 C to 125 C where an accuracy of 2 C is adequate The temperature...

Страница 18: ...d if desired When you configure the digital bits for input you can use the OM USB TEMP AI digital I O terminals to detect the state of a TTL compatible device Refer to the schematic shown in Figure 11...

Страница 19: ...og input s thermocouple voltage measurement Increasing the thermocouple length If you need to increase the length of your thermocouple use the same type of thermocouple wires to minimize the error int...

Страница 20: ...y the coefficients from the sensor manufacturer s data sheet USB connector The USB connector provides 5V power and communication No external power supply is required LED The LED indicates the communic...

Страница 21: ...tate Factory default configuration is Disabled mode Once configured each channel reverts to the mode previously set by the user Single ended Vx_H inputs are connected directly to their screw terminal...

Страница 22: ...x V3x 3 kHz Maximum working voltage signal common mode V0x V3x 10 25 V maximum T0x T3x fIN 60 Hz 100 dB Common mode rejection ratio V0x V3x fIN 60 Hz all input ranges 83 dB ADC Resolution 24 bits ADC...

Страница 23: ...nput channels The temperature input channels are configured as two channel pairs with T0x T1x and T2x T3x accepting temperature sensor type inputs This channel pairing requires T0x T1x and T2x T3x to...

Страница 24: ...ple measurement accuracy T0x T3x Table 4 Thermocouple accuracy specifications including CJC measurement error All specifications are Sensor Type Sensor temperature range Accuracy error maximum C Accur...

Страница 25: ...shown does not include errors of the sensor itself These specifications are for one year while operation of the OM USB TEMP AI unit is between 15 C and 35 C Contact your sensor supplier for details on...

Страница 26: ...s for 2 wire thermistor connections Contact your sensor supplier for details on the actual sensor error limitations Total thermistor resistance on any given channel pair must not exceed 180k ohms Typi...

Страница 27: ...ouples must not be connected to any conductive surfaces that may be referenced to earth ground Note 17 Unused voltage inputs should not be left floating These inputs should be placed in the Disabled m...

Страница 28: ...m Actual measured values stored in EEPROM Tempco 5 ppm C maximum Calibration reference Long term stability 30 ppm 1000 h Throughput rate Table 14 Throughput rate specifications Number of Input Channel...

Страница 29: ...ductive thermocouples the thermocouples are no longer isolated In this case thermocouples must not be connected to any conductive surfaces that may be referenced to earth ground Counter Table 16 CTR I...

Страница 30: ...ion 100 mA Supply current Note 21 Quiescent mode with all inputs configured for Disabled mode 270 mA typical User 5V output voltage range terminal block pin 21 4 9 V minimum to 5 1 V maximum User 5V o...

Страница 31: ...3 V minimum Note 22 The OM USB TEMP AI has two current excitation outputs with I1 dedicated to the T0x T1x analog inputs and I2 dedicated to T2x T3x The excitation output currents should always be use...

Страница 32: ...H T1 sensor input 33 GND 8 T1L T1 sensor input 34 V1L V1 voltage input 9 GND 35 V1H V1 voltage input 10 I1 T0 T1 current excitation return 36 GND CJC sensor 11 I2 T2 T3 current excitation source 37 V0...

Страница 33: ...therwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold...

Страница 34: ...ity Indicators Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial...

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