Omega Products TVS-1000 Installation Manual

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CONTENTS

1- INTRODUCTION

1.1 Introduction

1.2 General Applications and Benefits

1.3 Identification

2- HARDWARE

3- SOFTWARE DESCRIPTION

3.1 Introduction

3.2

3.3 Software Installation

3. ELECTRICAL AND SYSTEM REQUIREMENTS

4.1 Electrical and Safety Specifications

4.2 System Requirements

TVS-1000

software

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SECTION 1: INTRODUCTION

1.1 Introduction

TVS-1000 is a hot wire anemometer system for measuring air temperature and

velocity using single sensor technology. The device is connected to a PC or

laptop through a USB port for communication between the software and the

device. The system is capable of measuring temperatures from –10 oC to 120 oC

and flows from 0 to 10000 ft/min. The standard calibration is from 0 to 1200 lfm,

the high speed calibration is from 0 to 10,000 lfm. The air temperature at which

velocity is calibrated is from ambient to 85 oC. An attempt to measure flows in

temperatures higher than 85 oC, would give erroneous data, even though it can

read temperatures up to 120 oC.

1.2 General Applications and Benefits

Heat sink manufacturers, IC houses, board designers and other electronic

manufacturers are increasingly becoming interested in evaluating the thermal

performance of their product under different airflow conditions. The reduction of

electronic component sizes and increase in their power dissipation has forced the

electronic community to be more aware of the thermal performance of their

products. The hotter the devices, the shorter their life span and the greater the

likelihood of a malfunction. The challenge in these units is the reduction in the

spacing between boards, and thereby requiring small size sensors to measure air

flow measurement. Of utmost importance is the measurement of air flow and

temperature at the same point to minimize errors introduced as a result of

temperature gradients. The conventional hot wire systems measure these two

quantities using two independent sensors and, in most situations this can

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introduce errors in excess of 40% due to temperature gradients and radiation

coupling between the two sensors.

1.3 Identification

The TVS-1000 is identified by OE followed by a 5 digit number (i.e. OE12345)

located on the bottom of the unit.

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SECTION 2: HARDWARE DESCRIPTION

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The TVS-1000 is housed in an electronic box, which accepts commands from the

software through the USB communication port, and reports the data back to the

system. It includes the circuitry for temperature and velocity sensors. Figure 1,

shows the rear view of the TVS-1000 box.

Note: Please read the Manual before operating the system.

Figure 1 – Rear Panels of the TVS-1000 and TVS-1008

The function and description of ports and connectors on the rear panel are as

follows:

1.- Power- This is the location for a connection to power supply. The external

power supply provided with the system plugs in here.

2.- USB Port (Com Port)- The TVS-1000 is attached to the serial port of the PC

with a straight cable through this port. TVS-1000 comes with a 6 feet long

standard USB cable.

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3.- Port#- Sensors are attached to the TVS-1000 through these ports. The order

of attachment is immaterial, since each individual sensor has a sensor ID card

which enables the system to find its calibration constants from a text file located

in the PC C directory using its serial identification number.

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SECTION 3: SOFTWARE DESCRIPTION

3.1 Introduction

TVS-1000 software is a graphical user interface that communicates with the

TVS box through the PC USB port. This software enables the user to set the

different parameters and run the software to acquire the data.

THEORY OF OPERATION:

Data acquisition is comprised of cycles dictated by the duration set by the user in

minutes. Each cycle consists of a selected number of temperature measurements

followed by a selected number of velocity measurements. The selected number

is set by the user. The cycles will continue until the time elapsed is greater than

the duration. The user has the option to check the availability of the sensors and

select which of those sensors he wants to collect data. Software also allows the

user to save temperature and velocity raw data in text files that can be opened

in Excel using tab delimited. The software has different controls and is described

bellow:

3.2 TVS-1000 Software

Figure 2 and 3 show the TVS-1000 software main user interface when it is

running.