Omega HFS-5 User Manual

HFS Heat Flux Sensor Instruction Manual
Introduction
Heat flux sensors can be used to measure and quantify the thermal energy per unit area
moving through a surface of a system and can measure heat transfer in HVAC systems,
insulation analysis, refrigeration systems as well as countless other thermal applications.
Heat Flux Sensor Description
The HFS-5, HFS-6, & UHFS-09 heat flux sensors utilize a differential-temperature
thermopile design to measure the movement of thermal energy per unit area, or heat flux,
through the sensor surface. Each HFS sensor includes an integrated type-T thermocouple
that can be used for sensor temperature measurements. The sensitivity of each sensor
is provided with each unit recorded on their respective calibration certificate. Sensor
calibration procedures adhere to ASTM standard C1130 and are described later in this
manual.
Instruction Manual Contents
1
How to Use a Heat Flux Sensor
Brief Overview of Using the Heat Flux Sensor
3
Sensor Signal Measurements
3
Measuring Heat Flux Voltage
3
Measuring Thermocouple Voltage
4
Checking the Functionality of HFS Sensor &
Troubleshooting
4
Sensor Mounting/Installation
6
Removing Sensor from Measurement Surfaces
6
2
Converting Measurements to Heat Flux and Temperature
Type T thermocouple temperature measurement
6
Temperature Dependence of HFS Heat Flux Sensor
6
Calculating Heat Flux
7
Heat Flux Sensor Sensitivity Determination
8
HFS
-
5
HFS
-
6
UHFS
-
09

Omega HFS-5 Specifications

General

Accessory Type	Flow Switch
Connection Size	1/2" NPT
Switch Type	SPDT
Type	Paddle
Electrical Rating	125/250 Vac

Summary

Heat Flux Sensor Introduction

Heat Flux Sensor Description

Using the Heat Flux Sensor

Heat Flux Sensor Usage Overview

Provides a step-by-step guide for basic sensor operation and initial checks.

Sensor Signal Measurement

Explains the DC voltage output of the sensor and thermocouple for measurements.

Measuring Voltages

Details how to connect leads and measure heat flux and thermocouple voltages.

Sensor Troubleshooting and Checks

Outlines electrical resistance and zero-voltage checks to verify sensor operation.

Sensor Mounting and Installation

Describes methods for attaching the sensor to surfaces for accurate measurements.

Removing Sensor from Surfaces

Provides guidance on safely detaching the sensor from measurement surfaces.

Converting Measurements

Thermocouple Temperature Measurement

Explains how to record temperature measurements using a Type T thermocouple.

Temperature Dependence of Sensitivity

Discusses how sensor sensitivity varies with temperature and adjustment methods.

Calculating Heat Flux

Details the process of calculating heat flux using measured voltage and adjusted sensitivity.

Sensitivity Determination

Explains how to determine and adjust sensor sensitivity based on calibration data.

Directive Compliances

RoHS3 Compliance

Details the RoHS3 compliance statement for the heat flux sensor products.

REACH Compliance

Provides the REACH compliance statement for the heat flux sensor products.

EU Declaration of Conformity

Declaration of Conformity for HFS-5, HFS-6, UHFS-09 products.