Omega Products TVS-1100 Installation Manual

1

CONTENTS

1. INTRODUCTION

1.1 Introduction

1.2 General Applications and Benefits

1.3 Identification

2. HARDWARE

3. SOFTWARE DESCRIPTION

3.1 Operating Software

3.2 TVS-1100 Software

3.3 Software Installation

3. ELECTRICAL AND SYSTEM REQUIREMENTS

4.1 Electrical and Safety Specifications

4.2 System Requirements

2

SECTION 1: INTRODUCTION

1.1 Introduction

TVS-1100 is a hot wire anemometer system for measuring air temperature and

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

an USB port for communication between the software and the device. The

system is capable of measuring temperatures from –20 oC to 130 oC and flows

from 0 to 10000 ft/min. It can accommodate up to 32 channels. 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, thereby the requirement of 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

3

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

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

coupling between the two sensors.

1.3 Identification

The TVS-1100 is identified by OE followed by 5 digits (i.e., OE12345) located on

the bottom of the unit.

4

SECTION 2: HARDWARE DESCRIPTION

The device is housed in an electronic box that 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-1100 box.

Note: Please read the Manual before operating the system.

Figure 1 - Rear view of the TVS-1100

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

follows:

1. Power – This is the location for connecting the power supply to the

system.The external power supply provided with the system plugs in here.

5

2. USB Port (COM Port) – The TVS-1100 is attached to the serial port of the

PC with a straight cable through this port. TVS-1100 comes with a 6 feet

long standard USB cable.

3. Port# - Sensors are attached to the TVS-1100 through these ports. The

order of attachment is immaterial, since each individual sensor has a sensor

ID card that enables the system to find its calibration constants from a text

file located in the PC C directory using its serial identification number.

Figure 2 shows the front view of the TVS-1100. It has 8 LEDs associated with up

to 8 daughter cards. For every daughter card installed, there is one LED lit up.

Figure 2 - Front view of the TVS-1100

6

SECTION 3: SOFTWARE DESCRIPTION

3.1 Introduction

TVS-1100 software is a graphical user interface that communicates with the

TVS-1100 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 into text files that can be opened

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

described bellow:

3.2 TVS-1100 Software

Figure 3 and 4 show the TVS-1100 software user interface when it is running.

7