Measurement-computing CIO-DAS-TEMP Uživatelský manuál

CIO-DAS-TEMPTemperature Input Board User’s GuideRevision 4, November, 2000© Copyright 2000

5.2 SIGNAL RESOLUTION AND CONVERSION SPEEDThe voltage to frequency converter provides a resolution dependent on the sampling rate. The lower thesampl

5.3 OPERATION OF THE COUNTERSThe 8254 counters 0 and 1 are used to make the frequency measurement of the V/F output. Counter 1 isclocked by the 2 MHz

Generally, the choice of gate time is a matter of factoring the desired resolution against the time theactual measurement takes.Multiple Channels:Whe

6 REGISTER MAPA base address register controls the beg inning, or 'Base Address' of the I /O addresses occupied by thecontrol registers of t

First, program the 82C54 control register for CTR 1 to produce a single pulse for the duration of thecount period. Next, load an initial value equa

M1 M0 M0 Function0 0 0 Program selected counter as event counter, mode 00 0 1 Hardware triggered one shot. Pulse is the duration of the load value0

Table 5-2. Prescalar Divider/2 MHz Clock Control Codes61.01111115,6251110122.07011131,2500110244.14101162,5001010488.280011125,0000010976.561101250,00

7 SPECIFICATIONSPOWER CONSUMPTION+5V Normal Operation 890 mA Typical 960 mA MaxANALOG INPUTChannels 32 Current Input, AD592 Sensor SpecificRange 0 to

For for Notes.14

EC Declaration of ConformityWe, Measurement Computing Corp., declare under sole responsibility that the product:DescriptionPart NumberTemperature Inpu

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Table of Contents137 SPECIFICATIONS ...96.1 CONTROL REGISTERS ...

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1 INTRODUCTIONThe CIO-DAS-TEMP is a temperature measurement board desig ned for use with the A D592semiconductor temperature sensor. Since the AD592

2.2 HARDWARE2.2.1 Base I/O AddressThe CIO-DAS-TEMP may be set to operate at any one of a range of base addresses. T heCIO-DAS-TEMP uses eight, 8-b

3 INTERFACINGThe CIO-DAS-TEMP has 32 current inputs designed specifically for the AD592 semiconductor-type temperature sensor.3.1 CONNECTOR DIAGRAM3

Semiconductor temperature sensors may be purchased from some electronics distributors or directly fromMeasurement Computing Corp. An AD592 potted int

5 THEORY OF OPERATION5.1 OVERVIEWThe CIO-DAS-TEMP is composed of a C urrent to Voltage (C/V) converter, a Voltage to F requency(V/F) converter, a chan