Measurement CIO-DAS-TEMP User Manual
CIO-DAS-TEMP
Temperature Input Board
User’s Guide
Revision 4, November, 2000
© Copyright 2000
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HM CIO-DAS-TEMP.doc
Table of Contents
1 INTRODUCTION ................................................................
2 INSTALLATION .................................................................
3 INTERFACING ..................................................................
4 PROGRAMMING AND APPLICATIONS ...........................................
5 THEORY OF OPERATION .......................................................
6 REGISTER MAP .................................................................
7 SPECIFICATIONS ..............................................................
1
1
12.1 SOFTWARE ................................................................
12.2 HARDWARE ................................................................
2
33.1 CONNECTOR DIAGRAM .....................................................
33.2 CONNECTING THE AD592 SENSORS ..........................................
4
44.1 PROGRAMMING LANGUAGES ...............................................
44.2 PACKAGED APPLICATION PROGRAMS .......................................
5
55.1 OVERVIEW .................................................................
65.2 SIGNAL RESOLUTION AND CONVERSION SPEED ..............................
75.3 OPERATION OF THE COUNTERS ..............................................
75.4 LINE NOISE REJECTION .....................................................
9
96.1 CONTROL REGISTERS .......................................................
13
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1 INTRODUCTION
The CIO-DAS-TEMP is a temperature measurement board desig ned for use with the A D592
semiconductor temperature sensor. Since the AD592 is a current output dev ice, the on-board signal
conditioning is optimized for that sensor. A voltage-to-frequency converter translates the signal from the
sensor into a v alue proportional to tem perature. Functions in the Univ ersal Library convert that
proportional value into a temperature reading on which you can base a control system, or simply log for
later analysis.
The AD592 semiconductor temperature sensor is ideally suited for measurements in the ambient range. If
you are designing an HVAC system, or need to monitor the efficiency of an existing system, the
CIO-DAS-TEMP provides the best value and accuracy in the ambient range. More accurate than
thermocouples and less expensive than RTDs, the AD592 sensor is available through general distribution
or from Measurement Computing Corp. as an individual part or in a stainless steel probe.
Custom Ranges
The CIO-DAS-TEMP is a current input board with a fixed range of 0 to 500 µAmps. The front end may
be customized to allow up to 0 to 20 mA. T he CIO-DAS-TEMP provides up to a full 16 bits of
resolution and will easily reject line noise. If you have a current m easurement application and want a
precisely matched front end, please call our technical support and explain your needs to us.
2 INSTALLATION
2.1 SOFTWARE
There is a bank of switches to set before installing the board in your computer. By far the simplest way to
configure your board is to use the InstaCal
TM
InstaCal
will show you all available options, how to configure the switches to match your application
requirements, and will create a configuration file that your application software (and the Universal
Library) will refer to so the software you use w ill automatically know the exact configuration of the
board.
Please refer to the Software Installation Manual regarding the installation and operation of InstaCal
The following hard copy information is provided as a matter of completeness, and will allow you to set
the hardware configuration of the board if y ou do not have immediate access to InstaCal
computer.
TM
program provided as part of y our software pack age.
TM
and/or your
TM
.
1
2.2 HARDWARE
2.2.1 Base I/O Address
The CIO-DAS-TEMP may be set to operate at any one of a range of base addresses. T he
CIO-DAS-TEMP uses eig ht, 8-bit addresses, so the base addresses available are in steps of eig ht. For
example, 300h, 308h, 310h and so on. Table 2-1 of occupied PC addresses below should be
supplemented by information you provide about the addresses used by any other boards or devices
installed in your computer. After all occupied addresses are known, choose an available block of eight
I/O addresses for your CIO-DAS-TEMP. Make sure it is on a 3-bit (8-address) boundary.
Table 2-1. PC I/O Addresses
FUNCTION HEX RANGEFUNCTIONHEX RANGE
EGA 2C0-2CF8237 DMA #1000-00F
EGA2D0-2DF8259 PIC #1020-021
GPIB (AT) 2E0-2E78253 TIMER040-043
SERIAL PORT 2E8-2EF82C55 PPI (XT)060-063
SERIAL PORT 2F8-2FF8742 CONTROLLER (AT)060-064
PROTOTYPE CARD 300-30FCMOS RAM & NMI MASK (AT)070-071
PROTOTYPE CARD310-31FDMA PAGE REGISTERS080-08F
HARD DISK (XT) 320-32F8259 PIC #2 (AT)0A0-0A1
PARALLEL PRINTER378-37FNMI MASK (XT)0A0-0AF
SDLC 380-38F8237 #2 (AT)0C0-0DF
SDLC 3A0-3AF80287 NUMERIC CO-P (AT)0F0-0FF
MDA 3B0-3BBHARD DISK (AT)1F0-1FF
PARALLEL PRINTER3BC-3BFGAME CONTROL200-20F
EGA 3C0-3CFEXPANSION UNIT (XT)210-21F
CGA 3D0-3DFBUS MOUSE238-23B
SERIAL PORT 3E8-3EFALT BUS MOUSE23C-23F
FLOPPY DISK 3F0-3F7PARALLEL PRINTER270-27F
SERIAL PORT3F8-3FFEGA2B0-2BF
The Base Address is set by a switch on the
CIO-DAS-TEMP labeled ADDRESS. The
CIO-DAS-TEMP uses eight, 8 bit addresses.
The board is set at the factory for address 300h (
768 decimal) as shown here. It is a com mon
address for I/O boards and may already be in use
in your computer. Verify that it, or the address
you choose is available.
Address 300H Shown Below
987654
3
Figure 2-1. Base Address Switches
2
SW
A9
A8
A7
A6
A5
A4
A3
HEX
200
100
80
40
20
10
8
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