Sensotec PIM-3 Manuale utente
2080 Arlingate Lane Columbus, Ohio 43228 • (614) 850-5000
DIGITAL INLINE AMPLIFIER
MODEL PIM-3
MODEL PIM-3 Instruction Guide
Sensotec Part Number: 008-0239-00
Rev. E: November 1997
Copyright Notice:
Copyright © 1995 by Sensotec Inc.
2080 Arlingate Lane
Columbus, OH 43228
U.S.A.
All Rights Reserved.
Printed in U.S.A.
Trademarks:
PIM-3 is a trademark of SENSOTEC INC.
Table Of Contents
CHAPTER 1 - Introduction
1.1 Introduction.............................................................1-1
1.2 Organization........................................................... 1-2
CHAPTER 2 - Specifications
CHAPTER 3 - Block Diagram
CHAPTER 4 - Mounting and Wiring
4.1 Mounting ................................................................ 4-1
4.2 Wiring...................................................................... 4-1
4.3 Shunt Cal Resistor................................................. 4-6
CHAPTER 5 - Getting Started with the PIM-3
CHAPTER 6 - Command Format
6.1 Baud Rate, Bits and Parity..................................... 6-1
6.2 Special Order Instruments..................................... 6-2
6.3 Two Types of Commands...................................... 6-2
6.4 Addressing.............................................................. 6-2
6.5 Command Format....................................................6-3
6.6 Response Format................................................... 6-5
CHAPTER 7 - RS-232 Installation Notes
7.1 Introduction............................................................. 7-1
7.2 Function of Pins..................................................... 7-1
7.3 Operation Notes..................................................... 7-1
7.4 Typical Wiring Diagrams......................................... 7-2
CHAPTER 8 - RS-485 Installation Notes
8.1 Introduction..............................................................8-1
8.2 Installation Overview............................................... 8-1
8.3 Function of Pins.......................................................8-3
8.4 RS-422 Wiring.........................................................8-3
8.5 Black Box PC/AT Card Wiring................................ 8-4
8.6 RS-485 Wiring.........................................................8-5
8.7 Operation Notes..................................................... 8-6
Table of Contents
CHAPTER 9 - Application Programs
9.1 Introduction..............................................................9-1
9.2 Sample QBasic Program.........................................9-1
9.3 Hints for Procomm Plus for DOS............................ 9-3
9.4 Hints for Windows 3.1 Terminal............................. 9-3
CHAPTER 10 - System Commands
10.1 F6 Transmit Limit Status.................................... 10-2
10.2 W1 Write Baud Rate............................................ 10-3
10.3 W2 Write Automatic Linefeed Setting................. 10-4
10.4 W3 Write Echo Setting.........................................10-5
10.5 W4 Write Instrument Address............................ 10-6
10.6 WA,WC,WE,WG Write Setpoints for Limits 1-4.
RA,RC,RE,RG Read Setpoints for Limits 1-4.....10-7
10.7 WB,WD,WF,WH Write Hysteresis value Limits 1-4.
RB,RD,RF,RH Read Hysteresis value Limits 1-4. 10-8
10.8 WJ Write Automatic Limit Report........................ 10-9
10.9 WI Write Continous Transmit Setting..................10-10
10.10RR Read Software Revision............................... 10-11
CHAPTER 11 - Amplifier Commands
11.1 F0 Transmit Data............................................... 11-2
11.2 F1 Activate Tare/Zero.........................................11-3
11.3 F2 Clear Tare/Zero............................................. 11-4
11.4 F3 Calilbrate Analog-to-Digital Converter.......... 11-5
11.5 F4 Calibrate Amplifier using Shunt Cal Method..11-6
11.6 F5 Apply Shunt Resistor and Transmit Reading.11-7
11.7 F7 Transmit and Reset Average........................ 11-8
11.8 F8 Calibrate Amplifier using Known Load Method11-9
11.9 W5 Write Full Scale Value
R5 Read Full Scale Value...................................11-10
11.10W6 Write Engineering Units
R6 Read Engineering Units.................................11-11
11.11W7 Write Full Scale mV/V Value
R7 Read Full Scale mV/V Value......................... 11-12
11.12W8 Write Shunt Calibration Value
R8 Read Shunt Calibration Value...................... 11-13
Table of Contents
11.13W9 Write System Excitation
R9 Read System Excitation.................................11-14
11.14WK Write Known Load Calibration Value
RK Read Known Load Calibration Value.............11-15
CHAPTER 12 - Understanding Limits
12.1 Introduction..............................................................12-1
12.2 Definitions................................................................12-1
12.3 Configuring Limits....................................................12-2
CHAPTER 13 - Calibration Examples
13.1 Known Load Calibration Example........................... 13-1
13.1.1 Introduction.......................................................13-1
13.1.2 Requirements.................................................. 13-1
13.1.3 Calibration Example......................................... 13-1
13.2 Shunt Resistor Calibration Example........................13-3
13.2.1 Introduction.......................................................13-3
13.2.2 Requirements.................................................. 13-3
13.2.3 Calibration Example........................................ 13-4
13.3 Using a Single Transducer with Multiple PIM-3’s... 13-3
APPENDIX
A.1 Warranty and Repair Policy....................................A-1
A.2 Command Listing....................................................A-4
NOTES
Model PIM-3 1-1
Chapter 1
Introduction
1.1 Introduction
Inline Amplifiers are used in instrumentation systems
to provide drive voltage to sensors and to amplify trans-
ducer outputs. Generally, the amplified output is applied
to a data readout device such as a computer, in which the
data are manipulated for display in some fashion. The pri-
mary difference between "ordinary" analog inline amplifi-
ers and digital inline amplifiers is the fact that the output of
the digital versions is a digital signal, usually coded in
ASCII characters. Standards for serial data transmission
such as RS-232 or RS-485 specify the signal transmis-
sion characteristics.
Because the digital inline amplifier is effectively a
small computer, the usual functions of an inline amplifier
(covered above) can be increased greatly. For example,
averaging of many data points is possible. It is also possi-
ble to magnify a particular portion of the transducer's
operating range, thereby making "turndown" possible.
1-2 Introduction
1.2 Organization
Chapter 1, "Introduction," offers general information
about digital inline amplifers versus analog amplifiers.
Chapter 2, "Specifications," lists the specifications
and options available on the PIM-3.
Chapter 3, "Block Diagram," provides a block diagram
of the PIM-3 to explain the versatility of the device and
how it may be used.
Chapter 4, "Mounting and Wiring," shows all of the
connectors on the case of the PIM-3 and what the func-
tions are for each pin.
Chapter 5, "Getting Started with the PIM-3," describes
how to quickly establish that a PIM-3 is connected and
operating properly.
Chapter 6, "Command Format," describes the soft-
ware protocol used by PIM-3 instruments, which is the
same for both RS-232 and RS-485 equipped PIM-3's.
Chapter 7, "RS-232 Installation Notes," provides wir-
ing examples and hardware information for those using
RS-232-equipped PIM-3's.
Chapter 8, "RS-422/RS-485 Installation Notes," pro-
vides wiring examples and hardware information for those
using RS-485-equipped PIM-3's.
Model PIM-3 1-3
Chapter 9, "Applications Programs," includes the
source code for simple communications programs for an
IBM-PC compatible computer, which can be the start of
your own program development. The source is given in
both Turbo C and QuickBASIC languages. Also included
are hints for communicating with a PIM-3 using Procomm
Plus or the Microsoft Windows 3.1 Terminal.
Chapter 10, "System Commands," describes in detail
the commands that affect the communications and limit
setup of the PIM-3.
Chapter 11, "Amplifier Commands," describes in
detail the commands that affect the operation of the trans-
ducer amplifier.
Chapter 12, "Understanding Limits," explains the
setup and operation of the open-collector limits and gives
several setup examples.
Chapter 13, "Calibration Examples," provides exam-
ples of calibrating the PIM-3 to the transducer using Shunt
Calibration and Known-Load Calibration.
The Appendix includes warranty information and a
quick reference chart which shows all of the available
commands.
1-4 Introduction
Indice
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