Measurement-computing CIO-EXP-RTD16 Manual do Utilizador

CIO-EXP-RTD16RTD EXPANSION BOARDUser’s ManualRevision 2© Copyright, November, 2000

3.6 DAISY-CHAINING CIO-EXP-RTD16 BOARDSConnect one CIO-EXP-RTD16 to another using a C37FF-# ribbon cable. Connect from P2 on the‘upstream’ board to P

4 VOLTAGE MEASUREMENT CONFIGURATIONThe CIO-EXP-RTD16 is an amplification, signal conditioning and multiplexing accessory for DASboards. The inputs ar

To choose a switch-selectable amplification, calculate as follows:If your signal is bipolar, divide 10 by the full range of the signal. For example,

When using the custom second stage gain, set the switch marked CUSTOM on the S1 bank to the ONposition (down) and set the X7 switch on the S2 bank to

+IEXC+SENSE−IEXC−SENSECH0VoltageSourceAdd JumperSingle-Ended Voltage InputSignal-HighSignal-Low (Gnd.)Each input circuit has four screw terminals a

4.7.3 Fully DifferentialA differential signal has three wires fromthe signal source. The signals are SignalHigh, Signal Low and Signal Ground(-IEXC)

5 RTD MEASUREMENT CONFIGURATIONAn RTD is a temperature sensor that consist of a resistive element, usually a length of wire encased in asheath. Vari

For 100 ohm RTD, alpha = .00385:Temp (°C) Resistance (ohms)-200 18.49-100 60.250 100.00100 138.50200 175.84300 212.02400 247.04At a temperature of 40

Base Resistance Stage 1 Gain Stage 2 Gain Total Gain100 Ohms 8 7 561000 Ohms 4 7 285.4.1 First Stage GainONGAINSELECTCUSTOMX2X4X8A set of three Gain

5.5 CHANNEL CONFIGURATION SWITCHRTD connections may use 2, 3, or 4 wires coming from the probe. The three-wire connection is themost common. The pur

LIFETIME WARRANTYEvery hardware product manufactured by Measurement Computing Corp. is warranted against defects in materials orworkmanship for the li

5.6.1 Two-wire RTD Hookup+IEXC (EXCITATION CURRENT (+))+ SENSE- SENSE-?????CAO-IEXC (EXCITATION CURRENT(−))2-WIRERTDAdd Jumper WiresBetween Terminal

5.6.3 Four-Wire RTD HookupEXCITATION CURRENT (+)SENSE HIGH (+)SENSE LOW (-)EXCITATION CURRENT (-)WIRE RTDA four wire RTD has four leads. One to each

Calculate a new Vref using the desired Iexc:Vref = 10V - 5K * IexcThen calculate R89 value:R89 = 10K [ ( 2 − 10V / Vref ) / ( 10V / Vref − 1 ) ]In

7 SPECIFICATIONSPower consumption+5V 380mA typical, 533mA maxAnalog input sectionMultiplexer type HI507Number of channels 16 differentialInput ranges

Current ExcitationExcitation Switch selectable for 1 mA on board or custom valuedetermined by resistor selectionVoltage compliance 2VAccuracy Trimmabl

EC Declaration of ConformityWe, Measurement Computing Corp.., declare under sole responsibility that the product:CIO-EXP-RTD16 RTD Expansion BoardPart

Measurement Computing Corporation,16 Commerce Blvd.,Middleboro, MA 02346Tel: (508) 946-5100Fax: (508) 946-9500E-mail: [email protected]

Table of Contents155.6 CONNECTING THE RTD TO THE SCREW TERMINALS...155.5 CHANNEL CONFIGURATION SWITCH...

197 SPECIFICATIONS...186.2 CUSTOM SECOND STAGE GAIN RESISTOR - RX100...

1 INTRODUCTIONThe CIO-EXP-RTD16 is a signal conditioning accessory designed for use with the DAS08 and DAS16family of data acquisition boards. Circui

3 GENERAL CONFIGURATION3.1 A/D BOARD-TYPE SELECT JUMPERThe CIO-EXP-RTD16 may be used with either DAS08 or DAS16 family boards because the signalassign

NOTE: If the jumper setting does not agree with the selection made in InstaCal setup, InstaCal and theUniversal Library will not be able to make read

3.4 CONNECTING THE CIO-EXP-RTD16 TO THE A/D BOARD3.4.1 Connecting to a DAS08 Series A/D BoardA CIO-DAS08 series board may be connected directly throu

3.5 POWERING THE CIO-EXP-RTD16The CIO-EXP-RTD16 can be powered through the 37-pin cable or the Molex connector. The power thatcan be carried through