Оценок - 3, средний балл: 4.7
(
)
)
|
Фрагмент инструкции
INSTALLING.....................................................................................................................................4 2.1 LAYOUT...........................................................................................................................................4 2.2 JUMPER SETUP..................................................................................................................................5 2.2.1 JP0 ~ JP15 Analog Input R/C Filter ........................................................................................5 2.2.2 JP16 Analog Output Channel Jumper .....................................................................................5 2.2.3 JP19 Internal / External Power selection ................................................................................6 2.2.4 JP18 Local / Remote Gain control ........................................................................................6 2.3 PIN ASSIGNMENT .............................................................................................................................8 3 ANALOG INPUT & GAIN SETTING............................................................................................10 3.1 INPUT CHANNEL SELECTION..........................................................................................................10 3.2 GAIN SETTING................................................................................................................................11 3.3. THE THERMOCOUPLE INPUT .........................................................................................................12 3.3.1 Voltage - TO - Temperature Conversion................................................................................13 3.3 CJC OUTPUT..................................................................................................................................14 4 SIGNAL CONNECTION ..............................................................................................................15 4.1 FLOATING SIGNAL CONNECTION ...................................................................................................15 4.2 NON-FLOATING SIGNAL SOURCE...................................................................................................16 4.3 CASCADING OME-DB-889D.........................................................................................................17 4.4 OPEN THERMOCOUPLE DETECTION................................................................................................18 4.5BLOCK DIAGRAM ...........................................................................................................................19 5 PROGRAMMING ............................................................................................................................20 5.1 USING OME-A-822PGL ...............................................................................................................20 5.3 EXAMPLE PROGRAM ......................................................................................................................21 6. CALIBRATION ...............................................................................................................................23 6.1 CALIBRATION VR DESCRIPTION ....................................................................................................23 6.2 CALIBRATION STEPS ......................................................................................................................23 OME-DB-889D Multiplexer Board 1. Function Description The OME-DB-889D is an expansion multiplexer / amplifier board for use with OME-A-82X, OME-PCI-1800 series. Each OME-DB-889D multiplexes 16 differential analog input channels into one analog input of the DAS board. The high grade instrumentation provides software programmable gains of 0.5, 1, 5, 10, 50, 100, 500 and 1000. Thermocouple measurements are handled easily with OME-DB-889D. The board includes cold junction sensing and compensation circuitry that provides a scaling of 24.4mV/°C. Biasing restores are includes for open thermocouples detentions of voltage measurements or 112 channels of thermocouple measurement. 1.1 Features .. Connects directly to OME-A-82X, OME-PCI-1800 series boards with D-sub 37 connectors. .. Cold-junction compensation for thermocouples and thermocouple open detection. .. Software-programmable instrumentation amplifier .. Gain of 0.5, 1, 5, 10, 50, 100, 500, 1000 .. Daisy chain up to ten OME-DB-889D boards 1.2 Applications .. Energy management .. Signal conditioning .. Analog Multiplexer 1.3 Specification .. Accepts thermocouple type : J, K, T, E, S, R, B .. Cold-junction Compensation : +24.4mV/°C , 0V at 0°C .. Overvoltage protection : ±30V Continuous .. Common mode voltage : ±10V max. .. Analog output Voltage to A/D card :±10V Gain Common Mode Rejection Non linearity %of FSR Settling Time 0.5 99dB ±0.0004 23uS 1 99dB ±0.0004 23u...