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TSI Instruments 3022A User Manual

TSI Instruments 3022A
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Computer Interface and Commands 8-3
Computer Commands
The commands that are transmitted to the CPC are ASCII strings;
they are followed by a carriage return and a line feed. In response
to any incorrect or undecipherable transmissions, the CPC
transmits the word ERROR
followed by a carriage return and line
feed. Table 8-2 lists the commands and the CPC responses. A
simple computer program written in
BASIC is listed in the next
section to demonstrate the possible interfacing that you can do with
the CPC.
Table 8-2
Computer Commands
Command
Typical CPC
Response
Description
Cx,y OK The Calibration command saves a
concentration value for a given
voltage. To enter the calibration
data, the configuration paddle
switch must first be in the enable
position (see Figure 3-2). There are
121 calibration points in the CPC:
“x” is any voltage in units of one-
tenth of a volt. For example, 1 = 0.1
volt and 120 = 12.0 volts. “y” is
particle concentration in
particles/cm
3
, where 9,990,000 is
the largest number allowed.
Example: C0,0
C107,78900
C120,9990000
C
0,0 The C command by itself lists the
calibration data.
continued

Table of Contents

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TSI Instruments 3022A Specifications

General IconGeneral
BrandTSI Instruments
Model3022A
CategoryCash Counter
LanguageEnglish

Summary

Manual History

Safety

Laser Safety

Safety precautions for laser-based instrument operation.

Chemical Safety

Safe handling of n-butyl alcohol (butanol) working fluid.

Safety Labels and Symbols

Explanation of caution, warning labels, and hazard symbols.

Labels

Chapter 1: Introduction

Product Description

Details the instrument's function and components.

Features

Highlights improvements and new capabilities of the CPC.

Applications Overview

Lists typical uses and integration with other systems.

Chapter 2: Unpacking and Setting Up

Packing List

Lists all items included in the CPC package.

Unpacking Instructions

Steps for safely removing the CPC from its packaging.

Protective Caps

Instructions for removing protective coverings.

Line Voltage Configuration

Verifying and setting the correct line voltage.

Fuse Changing Procedures

Procedure for replacing fuses based on line voltage.

Bottle Bracket Mounting

Instructions for attaching the fluid bottle bracket.

Filling the Bottle with Fluid

How to fill the working fluid bottle.

Changing the Inlet Location

Procedure for reconfiguring the aerosol inlet location.

Applying Power to the CPC

Connecting the instrument to power and initiating startup.

Chapter 3: Operation and Display

Front Panel Functions Overview

Explains front panel functions, indicators, and controls.

Warmup Mode

Description of the instrument's startup and warm-up sequence.

Primary Functions

Details on the main operational buttons like Pump, Display, Total, Clear, Range.

Secondary Functions

Accessing secondary functions like Status, Drain/Fill, Flow Hi/Lo.

Indicator Lights

Explains the meaning of front panel indicator lights.

Back Panel Functions Overview

Description of connectors and functions on the rear panel.

COM PORT

Details the RS-232 communications port for computer interfacing.

Analog Output

Function of the BNC connector for analog data output.

Other Back Panel Connectors

Mux Output, Pulse Output, Liquid Supply, Makeup Air, Pump Exhaust, Liquid Drain.

Operating Specifications and Precautions

Important operating parameters and safety advice.

Ambient Temperature and Inlet Pressure

Operating temperature range and effects of inlet pressure.

Flow Modes and Counter Movement

High/Low flow modes, moving, and drying procedures.

Chapter 4: Configuring the CPC

Enabling Configuration Mode

Steps to activate the configuration mode using a paddle switch.

Running Configuration Function

Step-by-step process for setting up CPC parameters.

Flow Calibration Procedures

Guides for flow and condenser flow calibration.

Chapter 5: Technical Description

Theory of Operation

Principles of condensation and particle detection.

Historical Context

Background on the development of condensation nucleus counters.

CPC Design and Subsystems

Overview of the CPC's major components and design.

Sensor Details

Components of the CPC sensor assembly.

Microprocessor and Flow System

Role of microprocessor, flow options, and system components.

Chapter 6: Particle Counting

Optical Detection Method

Process of detecting scattered light from droplets.

Particle Counting Modes

Realtime, live-time counting, and accuracy considerations.

Calibration and Autoranging

Photometric calibration and automatic range adjustment methods.

Chapter 7: Calibrating the CPC

Calibration Methods

Setup and procedures for photometric and dilution-bridge calibration.

Chapter 8: Computer Interface and Commands

Computer Interface Hardware

Hardware connection details for PC interfacing via COM PORT.

Communication Settings

Baud rate and parity settings for serial communication.

CPC Commands and BASIC Program

List of ASCII commands and a sample BASIC program for control.

Chapter 9: Maintenance and Service

Filter Maintenance Procedures

Procedures for changing HEPA, tube, and pump exhaust filters.

Leak Checking and EPROM Installation

Methods for checking leaks and updating firmware.

Troubleshooting and Technical Support

Identifying failures, solutions, and contacting TSI support.

Chapter 10: Applications

General Applications

Using the CPC for clean air and with multiplexers.

Advanced Applications

Testing filters and using with diffusion batteries or DMPS systems.

Appendix A: References

Appendix B: Specifications

Appendix C: Technical Papers

Appendix D: Calibration and Data Sheets

Appendix E: Software Disk

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