TSI Instruments EVM SERIES User Manual

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ENVIRONMENTAL MONITOR

EVM SERIES

USER MANUAL

Page 2

Dangers, Warnings, & Cautions

Page 3

iii

DANGER!

Failure to observe the following procedures may result in serious personal injury:

 Not for use in Explosive or Hazardous locations. This product is NOT Intrinsically Safe.  Contains built-in lithium ion battery pack. DO NOT incinerate or dispose of in fire.  DO NOT disassemble, alter, or re-construct the li-ion battery.  Contains Class 3B visible laser radiation source (658 nm, nominal 5 mW). DO NOT look

directly into beam or view with telescopic devices.

 This instrument will NOT detect natural gas.

WARNING!

 Read the manual before operation.  DO NOT store in temperatures exceeding 60°C (140°F) and in direct sunlight.  DO NOT immerse in liquids.  The Sensors and batteries in this instrument have limited shelf-life, even if never used.  DO NOT disassemble, service, or clean the optical engine internal components while power is

applied. The laser source can hurt you.

Caution!

General

 Condensation may damage your instrument and its sensors.  A non-condensing environment is required for proper measurements.  DO NOT charge batteries outside the range of 0°C to 40°C (32°F to 104°F).  Battery run-time may be somewhat reduced at lower than 20°C (68°F) temperatures.

Caution!

Temp/RH/Dew Point

The internal Temp/RH sensor in this instrument is not designed for use in bright sunlight or in the presence of a strong radiant heat sources. It is intended primarily for indoor use. It is not equivalent to a protected dry-bulb thermometer.

Dangers, Warnings, & Cautions

ENVIRONMENTAL MONITOR

EVM SERIES

EVM Series User Manual

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Dangers, Warnings, & Cautions

Caution!

PM/dust

 Clean the optical engine mirror with a soft cloth, if it is dirty. Scratches will affect performance.  Avoid measuring wet particles, fogs, and liquid mists that will tend to cling to the impactor,

optical engine, tubing, and pump surfaces.

 Avoid oily mists as found near some machining operations.  This monitor is designed to measure dry particulates, not filaments.  DO NOT attempt to measure Asbestos with this instrument.  Keep a "Pump Protection Filter" or other gravimetric filter in place to help prolong the life of the

pump.

 You must check and calibrate the flow rate, when using this device as a (gravimetric) sampling

pump.

Caution!

CO2

Avoid exposure to condensation, fogs, and liquid mists that can contaminate the optical path inside the CO2 sensor.

Caution!

PID

 This instrument cannot detect methane gas.  For best sensor life, avoid acidic condensing gases.  The presence of moisture can affect performance of the PID.

Caution!

Toxic

Beware of certain cross-sensitivities when measuring toxic gas levels. Readings can be nonspecific in the presence of certain cross-contaminant gases.

Caution!

ir velocity

The tip of the Air velocity probe is very fragile.

EVM Series User Manual

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Dangers, Warnings, & Cautions

FCC Compliance Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial or residential environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. If harmful interference occurs, the user will be required to correct the interference at his or her expense.

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Table of Contents

Dangers, Warnings, & Cautions ....................................... iii

Table of Contents.............................................................. vii

Introduction ......................................................................... 1

Particulate Sampling (Aerosols/Dust Vapors) ................. 2

Particulate Path ............................................................... 2

Particulate Sizes .............................................................. 3

Particulates and Cut-Point ............................................... 4

Collecting/Sensing the Particulates ................................. 4

Gravimetric Sampling ...................................................... 4

Pump ............................................................................... 4

Gas Sensors Sampling ....................................................... 4

Gas Sensors and Path .................................................... 5

Volatile Organic Compounds (VOCs) Sampling .............. 6

Temperature, Relative Humidity, Dew Point .................... 6

What the Standards Say ..................................................... 6

Resources ....................................................................... 7

EVM Series .......................................................................... 8

Applications ..................................................................... 8

Models Explained ............................................................ 9

Getting Started .................................................................. 11

Checking the Equipment .................................................. 11

Display and Keypad .......................................................... 12

Diagram ......................................................................... 12

Keypad description ........................................................ 12

Turning on ......................................................................... 13

Start Screen Explanation ............................................... 13

Navigating ...................................................................... 14

Indicators/Icons on the display ...................................... 14

Turning Off ........................................................................ 15

Instrument Information .................................................... 15

Unit Information Screen ................................................. 15

TSI Detection Management Software DMS .................... 17

Communicating ................................................................. 17

Powering and Outputs on the EVM ............................... 17

Setting up the Environmental Monitor ............................ 19

Setting up Parameters via the Keypad ........................... 19

Time and Date Setting ................................................... 19

Checking Battery Power ................................................ 20

Display: Language, Contrast, and Key Click ................. 22

Battery ...................................................................... 17

Charging ................................................................... 18

Outputs ..................................................................... 18

Setting Logging and Viewing Run Time ........................ 23

PID Sensor Setup .......................................................... 25

Changing Units (Temperature, Particulates, PID,

and Air Velocity) ......................................................... 27

Setting up Particulate Settings ...................................... 27

Setting Profiles (Particulate Correction Factors) ........... 28

How Particulate Factors are Adjusted and Calculated .. 28

Dust Correction Factors (Profiles) ............................ 28

Particulate Pump: Enable or Disable ............................. 30

Resetting the Gravimetric Filter ..................................... 30

Auxiliary Input/Output .................................................... 31

Digital Output ........................................................... 31

Air Velocity ..................................................................... 33

Analog-out ..................................................................... 33

Restoring Default Factory Settings ................................ 34

Backlight Setting ............................................................ 36

Resetting the EVM ......................................................... 36

Lock/Secure Run and/or Setup ..................................... 36

Unlock run and/or setup ................................................ 38

Auto-run ......................................................................... 38

Auto-run and timed-run mode .................................. 38

Auto-Run with Date Mode ........................................ 39

Auto-Run with Day of Week (DOW) Mode ............... 40

Calibrate Sensors ............................................................. 43

Placement and Calibration of Sensors ........................... 43

Calibrating sensors include: .......................................... 43

Inserting and Removing Sensors .................................. 43

Calibrating Particulates .................................................. 44

Impactor and use ........................................................... 45

Adjusting the Impactor/Turret Setting ............................ 46

Particulates Calibration (Zero Cal) ................................ 47

Particulate Advanced Calibration (Gravimetric) ............ 51

Gravimetric Calibration Overview ............................ 52

Performing a Gravimetric Calibration ............................ 52

Pump Flow Rate Calibration .......................................... 53

Toxic Gas Sensors ........................................................ 54

Cross Sensitivity ............................................................ 55

How Sensors Operate .............................................. 55

Quality Calibrations ....................................................... 55

About Sensors and Cal Storage .................................... 55

Calibration History and Sensor Serial Numbers ............ 55

Applying a Gas Sensor .................................................. 56

Calibrating Toxic Gas Sensors ...................................... 56

Toxic Gas Zero Calibration ...................................... 57

Ozone Calibration for Zero and Span ...................... 57

Toxic Gas Span Calibration ..................................... 59

Calibrating CO2 AND O

Accuracy .............................................................. 60

................................................ 60

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Table of Contents

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Calibrating Photo-Ionization Detector (PID) Sensor ...... 63

PID parts per million (ppm) zero calibration ............. 63

PID parts per billion (ppb) zero calibration ............... 63

PID Span Calibration ............................................... 64

Calibrating Relative Humidity and Temperature ........... 66

Calibration History ......................................................... 67

Verify Calibration and Drifting Analysis ......................... 68

Measuring and Viewing .................................................... 71

Overview of Running a Session ...................................... 71

Quick Help ..................................................................... 71

Measuring .......................................................................... 71

Understanding What Data is Stored .............................. 72

Summary Data ......................................................... 72

Logged Data/Time History ............................................. 72

Running and Stopping ................................................... 73

Measurement Screens and Navigation ........................... 74

Unit defined ................................................................... 74

About the Measurement Soft Keys ................................ 75

Particulate Measurement Screen .................................... 76

Impactors and Particulate Measuring ............................ 76

Extending Run-Time for PM Measurements ................. 76

Changing Particulate Measurements ............................ 77

Relative Humidity and Temperature Measurements ..... 78

Relative Humidity and Temperature Screen ................. 78

Gas Measurements ........................................................... 79

Gas Screen .................................................................... 79

Composite Measurement ................................................. 80

Composite Screens ....................................................... 80

Air Velocity Meaursurement Screen ............................... 81

Summary Data ................................................................... 82

Viewing Details in the Measurement Screen ................ 82

Trend Data ......................................................................... 83

Viewing trend data in the measurement screen ............ 83

Past Session...................................................................... 84

Summary Data Screen .................................................. 84

File System Menu ............................................................. 86

Deleting Sessions Individually ....................................... 86

Delete All Sessions ....................................................... 87

Memory Remaining and File Properties ........................ 88

Estimated Run Time ...................................................... 89

Detection Management Software .................................... 91

Environmental Monitor Communication ........................ 91

Downloading Data with the EVM ..................................... 93

EVM: Viewing Data ........................................................... 93

Selecting a session/study .............................................. 93

EVM Panel Layout View (PLV) Page ............................ 94

EVM Reports and Printing ................................................ 96

Customizing Reports ..................................................... 97

EVM Setup .................................................................... 98

Saving and Sending Configurations ......................... 98

General EVM Setup ....................................................... 99

EVM General Parameters Table .............................. 99

EVM and Logging Settings .......................................... 100

EVM Logging Parameters Table ............................ 101

EVM and Auto-Run Setting ......................................... 101

Timed-Run and Auto-Run Setting .......................... 102

Date and Auto-Run Setting .................................... 102

Day of Week and Auto-Run Setting ....................... 103

EVM and Security Settings .......................................... 104

EVM and Triggering Settings....................................... 104

EVM and Particulate Settings ...................................... 106

EVM and Particulates Setup .................................. 106

EVM Firmware Update ................................................ 107

Maintenance and Cleaning............................................. 109

Overview .......................................................................... 109

PID Sensor .................................................................. 109

Removing and Installing PID Sensor ........................... 110

Maintenance and Cleaning Overview of PID ............... 111

Cleaning PID Sensor ................................................... 111

Optical Engine: Maintenance and Cleaning ................ 113

Impactor Care .................................................................. 116

Impactors and When To Clean .................................... 117

Gravimetric Cassette and Filter Paper .......................... 117

Specifications .................................................................. 119

Particulate Sensor .......................................................... 119

Volatile Organic Compounds (VOCs) Gas

Detector (PID Sensor) ..................................................... 119

Carbon Dioxide Sensor .................................................. 120

Relative Humidity Sensor............................................... 120

Temperature Sensor ....................................................... 120

Toxic Gas Sensors .......................................................... 121

Air Velocity Accessory (Optional – Air Probe 10)........ 121

Displayed Data ................................................................ 121

Electrical Characteristics ............................................... 122

Environmental effects .................................................... 122

Physical characteristics ................................................. 122

Measurements units ....................................................... 122

Operating Modes ............................................................. 123

Time Constants ............................................................... 123

Special Functions ........................................................... 123

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Table of Contents

Estimated Logged Run Times ....................................... 124

Standard EVM-7 (Memory and logged time) ............... 124

Standard EVM-4 (Memory and logged time) ............... 125

Standard EVM-3 (Memory and logged time) ............... 127

Accessories: Replacement and Optional Parts ........... 128

Customer Service ........................................................... 131

Technical Support Contacts .......................................... 131

Service Contact Information .......................................... 131

Returning for Service ..................................................... 132

Calibration ....................................................................... 132

Warranty .......................................................................... 133

Glossary of Terms .......................................................... 135

Appendix C ...................................................................... 141

PID sensor and correction factors tables .................... 141

Appendix D ...................................................................... 151

Frequently Asked Questions (FAQs) ............................ 151

List of Figures

Figure 1-1: Particulate path diagram .................................... 2

Figure 1-2: Particulates and diameter size ........................... 3

Figure 2-1: Identifying your equipment ............................... 11

Figure 2-2: EVM keypad and display explained ................. 12

Figure 2-3: Start screen defined ......................................... 13

Figure 2-4: Unit Information screen .................................... 15

Figure 2-5: Selecting Unit Info. Sensors ............................. 16

Figure 2-6: Viewing installed sensors ................................. 16

Figure 2-7: Communicating with DMS via USB cable ........ 17

Figure 2-8: USB, power jack and digital output port ........... 18

Figure 3-1: Time-Date screen parameters ......................... 20

Figure 3-2: Start screen ...................................................... 21

Figure 3-3: Battery screen .................................................. 21

Figure 3-4: Screen display settings .................................... 22

Figure 3-5: Logging screen ................................................. 24

Figure 3-6: Estimated run time for logging screen .............. 25

Figure 3-7: PID correction factor ......................................... 26

Figure 3-8: PID correction factor displayed on

measurement screens .................................................... 26

Figure 3-9: Units screen ..................................................... 27

Figure 3-10: Edit profiles for dust calibration ...................... 29

Figure 3-11: Entering a profile for particulate calibration .... 29

Figure 3-12: Particulate setup screen ................................. 30

Figure 3-13: Configuring digital output................................ 32

Figure 3-14: Air Velocity setting .......................................... 33

Figure 3-15: Analog out results with temperature

as output ......................................................................... 33

Figure 3-16: Analog-Out screen ......................................... 34

Figure 3-17: Defaults screen (restoring factory settings) .... 34

Particulate Measurements ........................................... 151

Gravimetric Sample (optional for particulate

calibration) ................................................................ 153

Toxic Sensor Measurements ....................................... 154

Pump/Airflow Measurements ....................................... 155

Digital Output (using stereo plug & diagram) .............. 156

PID Questions (for Volatile organic compound

measurements) ........................................................ 157

Power........................................................................... 158

Alarm Outputs .............................................................. 158

General: Mechanical .................................................... 159

Sensor and how to reorder .................................. 159

Sensor and how to reorder (continued) ............... 160

Calibrating Sensors ..................................................... 160

Appendix E ...................................................................... 163

System Errors Displayed on the EVM Series ............... 163

INDEX ............................................................................... 165

Figure 3-18: Restoring default calibrations ......................... 35

Figure 3-19: Backlight key .................................................. 36

Figure 3-20: Lock Soft key .................................................. 37

Figure 3-21: Setting lock/secure ......................................... 37

Figure 3-22: Selecting auto-run with timed-run mode......... 38

Figure 3-23: Setting timed-run and duration ....................... 39

Figure 3-24: Selecting auto-run with date mode ................. 39

Figure 3-25: Setting auto-run date mode ............................ 40

Figure 3-26: Setting auto-run DOW mode .......................... 41

Figure 4-1: Sensor housing and manifold ........................... 43

Figure 4-2: Sensors’ locations ............................................ 44

Figure 4-3: How the impactor functions .............................. 45

Figure 4-4: PM2.5 impactor setting example ...................... 46

Figure 4-5: Adjusting impactor/turret setting ....................... 47

Figure 4-6: Particulate zero cal with HEPA filter ................. 48

Figure 4-7: Selecting calibration screen ............................. 48

Figure 4-8: Particulate cal screen ....................................... 49

Figure 4-9: Particulate calibration and ready screen .......... 49

Figure 4-10: Particulate calibration and waiting screen ...... 50

Figure 4-11: Particulate calibration pause screen .............. 50

Figure 4-12: Zero Cal set for Particulates ........................... 51

Figure 4-13: Reset gravimetric setting ................................ 52

Figure 4-14: Pump flow rate calibration .............................. 53

Figure 4-15: Flow Rate Calibration ..................................... 54

Figure 4-16: Calibration history for EVM ............................. 55

Figure 4-17: Applying a gas sensor .................................... 56

Figure 4-18: Selecting sensor for calibration process......... 57

Figure 4-19: Calibration zero screen .................................. 58

Figure 4-20: Calibration zero pause screen ........................ 58

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Table of Contents

Figure 4-21: Span Calibration ............................................. 59

Figure 4-22: Saved Calibration screen ............................... 60

Figure 4-23: Selecting a calibration sensor ........................ 61

Figure 4-24: Calibration CO2 ready screen ........................ 61

Figure 4-25: Setting CO2 Span Cal screen ......................... 62

Figure 4-26: Saved Calibration ........................................... 62

Figure 4-27: Selecting PID sensor for

calibration process ......................................................... 63

Figure 4-28: Calibration mode screen ................................ 64

Figure 4-29: PID Calibration Span soft key ........................ 65

Figure 4-30: Saved Calibration screen ............................... 66

Figure 4-31: Temperature calibration ................................. 67

Figure 4-32: Calibration History screen .............................. 67

Figure 4-33: Calibrate offset verify screen for

PID sensor ...................................................................... 68

Figure 4-34: Calibrating PID ............................................... 68

Figure 5-1: Quick help list for running a study .................... 71

Figure 5-2: Sample summary data from DMS reporting ..... 72

Figure 5-3: Sample time history data (or logged data)

chart ................................................................................ 73

Figure 5-4: Composite measurement screen in

run mode ........................................................................ 73

Figure 5-5: Example of measurement soft key menus ....... 75

Figure 5-6: Particulate Measurement screen ..................... 76

Figure 5-7: Selecting a measurement calculation .............. 77

Figure 5-8: RH and temperature measurement screen ...... 78

Figure 5-9: Gas measurement screen ................................ 79

Figure 5-10: Composite measurement screen ................... 80

Figure 5-11: Attaching Air Probe and measuring

Air velocity ...................................................................... 81

Figure 5-12: Details of the composite measurement

screen ............................................................................. 82

Figure 5-13: Selecting Trend soft key ................................. 83

Figure 5-14: Trend Screen for PM (Dust) ........................... 84

Figure 5-15: Past session screen ....................................... 84

Figure 5-16: Past Session with Files selected .................... 85

Figure 5-17: Summary screen of a past session ................ 86

Figure 5-18: Delete session message ................................ 87

Figure 5-19: Delete all sessions message .......................... 87

Figure 5-20: File Systems properties screen ...................... 88

Figure 5-21: Viewing estimated run time ............................ 89

Figure 6: Communicating with the EVM and DMS ............. 91

Figure 6-1: DMS Start page and Setup/Download

options ............................................................................ 92

Figure 6-2: EVM and downloading ..................................... 93

Figure 6-3: Data finder page ............................................... 94

Figure 6-4: Charts and Graphs (panels) ............................. 95

Figure 6-5: EVM data in a report format ............................. 96

Figure 6-6: Customizing DMS reports ................................ 97

Figure 6-7: Saving and sending EVM setups ..................... 98

Figure 6-8: General EVM setups ........................................ 99

Figure 6-9: Logging EVM setups ...................................... 101

Figure 6-10: EVM Timed-Run Auto-Run setting ............... 102

Figure 6-11: EVM Auto-Run with Date setting .................. 103

Figure 6-12: EVM Auto-Run with Day of Week setting ..... 103

Figure 6-13: EVM Auto-Run with Day of Week setting ..... 104

Figure 6-14: EVM Triggering setup ................................... 105

Figure 6-15: EVM Auto-Run with Day of Week ................ 106

Figure 7-1: Removing and inserting PID sensor ............... 110

Figure 7-2: Removing intelligent-sensor casing

with PID ........................................................................ 111

Figure 7-3: Removing the lamp with removal tool ............ 112

Figure 7-4: Remove/insert PID sensor with lamp

& pellet .......................................................................... 112

Figure 7-5: PID sensor cleaning kit ................................... 112

Figure 7-6: Fitting/Inserting the lamp and pellet ............... 113

Figure 7-7: Optical engine and cleaning ........................... 114

Figure 7-8: Cleaning the optical engine ............................ 115

Figure 7-9: When to clean impactors ................................ 117

Figure 7-10: Gravimetric cassette and filter paper

maintenance ................................................................. 117

List of Tables

Table 2-1: Keypad/user interface explained ....................... 13

Table 2-2: Indicators (i.e., run, stop, battery, Altf ............... 14

Table 3-1: Display settings explained ................................. 22

Table 3-2: Logged intervals and selecting logged

measurements ................................................................ 23

Table 3-3: Digital out/Logic settings .................................... 31

Table 4-1: Cross-sensitivity table of interfering gas ............ 55

Table 4-2: Gas calibration soft keys explained ................... 58

Table 5-1: Unit abbreviations .............................................. 74

Table 5-2: Measurement soft keys explained ..................... 75

Table 5-3: Measurement values explained ......................... 78

Table 5-4: Past session files soft keys explained ............... 85

EVM Series User Manual

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Introduction

Caution

The EVM is intended to measure gases that are potentially dangerous to human health. To help ensure worker safety through the proper use of your unit, it is important that you not only read but also understand the contents of this manual. Familiarize yourself with the unit before using it in a potentially hazardous situation.

CHAPTER

Table of Contents

Introduction

The EPA (Environmental Protection Agency) conducted a study over the last 25 years (1975-2000) and determined that 107 measurable air pollutants, specifically carcinogens, exist in working environments. Combined with the advent of closed windows, modern office buildings and various cleaning solvents, the outcome has been energy efficient buildings and homes which contain levels of carcinogens. At high levels, this is known as “Sick Building syndrome” and can cause acute effects such as headaches, eye/nose/throat irritation, dry cough or itchy skin, fatigue, and trouble concentrating just to name a few. Area monitoring or spot checking for high levels of pollutants, such as particulates, VOCs, and toxics, should be a common practice to ensure good indoor air quality exists in your environment. If poor air quality is determined, engineering controls such as proper air ventilation and the removal of toxic gases, would be put into place in order to provide an adequate working/living environment.

The EVM is equipped to measure several different airborne containments or air pollutant applications including:

 Particulate matter sampling (dust monitoring)  Gas sampling  Temperature sampling  Relative Humidity and Dew Point sampling

To get you started quickly with the EVM, the first chapter is dedicated to introducing basic particulate matter and toxic gas information. The subsequent chapters will guide you through setting up the EVM, running studies, and assessing your results with easy to follow steps and illustrations.

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Introduction

(1) TURRET

Air travels though the impactor and the larger, heavier particulates will stick to the greased plates within the impactor.

(2) OPTICAL ENGINE

While the pump maintains the flow rate, the smaller lighter particulates will pass through the optical engine.

(4) PUMP

The remaining clean/filtered air passes through the pump.

(3) GRAVIMETRIC CASSETTE

The particulates will collect/trap in the gravimetric filter/cassettes.

(5) FLOW SENSOR

The clean/filtered air passes through flow sensor (flow-control orifice hole).

(6) OUTLET

Lastly, it passes through to the Outlet on the back of the instrument.

❶ ❷ ❸ ❹ ❺

❻

Particulate Sampling (Aerosols/Dust Vapors)

The EVM is a portable-area monitoring instrument with a laser-photometer that measures and stores concentration levels of airborne-dust over time. It is designed to measure and help you identify the air pollutants, existing as matter (gases and aerosols) in the environment. The methodology used entails a handful of components including: an air inlet, the impactor (which is the particle size selector), the collection of particulates, gravimetric sampling, and the pump which are addressed in the upcoming sections.

Particulate Path

Figure 1-1: Particulate path diagram

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Introduction

Gases and

Aerosols

Defined

-----Liquid: Mist--------------►

-----Solid: Fume---►

◄--------Spray----------------

◄-------Particulates----------

Aerosols and

Particles

Medical

implications

◄---Oil smokes---►

◄-------------

◄---------------

Cement dust-----------►

---Fly ash----------------------

----Tobacco smoke--►

◄--------------

--- Coal dust---------------►

◄---Pollens-------------►

◄--Atmosphere/Airborne--►

inhalable particulates

◄--Wood.► Dust

◄--Textiles--► Dust

---------Respirable pm---------► (inhaled & penetrates the lungs)

---Thoracic pm------------------------► (inhaled & penetrates the larynx/throat)

----------------------------Inhalable pm------------------►

(inhaled via the nose and /or mouth)

Particulate Sampling (Aerosols/Dust Vapors)

Particulate Sizes

Aerosols and gases are experienced in industrial processes, workplaces, and in everyday life. Keeping in mind that inhalable dust is 100 microns and smaller, this dust is usually filtered through the hairs and membranes in your sinuses. 10 microns and smaller is considered “thoracic”, 4-10 microns is “inhalable” reaching into your windpipe and other regions, and 4 microns and smaller is “respirable”. These particulate sizes will represent what you will be measuring.

The figure below identifies different types and sizes of particulates and how it affects the human body.

.01 0.1 1 10 100 1000

Particle matter (pm) diameter μm

Figure 1-2: Particulates and diameter size

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Gas Sensors Sampling

Gravimetric sampling is a type of filtering process in which the particulates are collected and filtered into the gravimetric cassette after the dust passes through the optical engine of the EVM. A user supplied sealed gravimetric cassette can be used in place of the cassette provided by TSI. The sealed cassette can be sent to a laboratory for analysis. This testing is typically used to measure personal exposure to inhalable dust concentrations.

Particulates and Cut-Point

In consideration of how the size of particulates affect the human body, it is important to select a particulate size cut-point. Essentially, the particle size selector on the EVM is a top-mounted rotary impactor. Based on your setting, it will filter out all particulates at or above the selected size. The instrument has four settings which include 2.5 μm, 4 μm, 10 μm, or none (100 μm). (This is explained in more detail in Chapter 4.)

Collecting/Sensing the Particulates

Once the impactor setting is selected, the EVM collects (or measures) real-time aerosol/dust concentration using a 90º optical light scattering photometer to determine the total mass concentration (in units of mg / m3) of particulate matter. Additionally, gravimetric sampling, a more accurate method, is also used to determine the mass of particulates.

Gravimetric Sampling

Pump

The pump is used in the particulate sampling process as a source of air movement so the particulates are aspirated (or suctioned out) and collected for measurement. The flow rate is 1.67 Liter per minute. The pump is typically calibrated before each gravimetric sampling.

Gas Sensors Sampling

The EVM uses a unique smart sensor technology includes automatic sensor recognition and measures up to three gases simultaneously: a selection of optional nine toxic gases, Carbon Dioxide, combustible gases, and VOCs.

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Gas Sensors Sampling

(1) AIR INLET COVER

The path begins with the air pulling through the air inlet cover.

(2) GAS SENSOR CHAMBERS

The air continues through the gas sensor bar passing the Toxic, PID, and CO2 sensor chambers.

(3) Fan

It is continuously ventilated by the fan.

(NOTE: When the pump is off, the fan can be heard near the louvers on the back cover.)

(4) Temperature sensor

Measures the ambient air temperature.

❹

Temperature sensor

Gas sensor(s) path

❷

❶

Air inlet cover

❸

Fan

Very quiet!

Gas Sensors and Path

TSI’s unique smart sensor technology includes automatic sensor recognition, calibration levels, temperature compensation information and other valuable data that travels with the sensor from one unit to another.

The following diagram illustrates the gas sensor path for Toxic, CO2, and PID sensors. It also identifies the temperature sensor for additional analysis/measurements.

Figure 1-3: Gas sensor path illustration

EVM Series User Manual

Page 16

Introduction

Volatile Organic Compounds (VOCs) Sampling

According to the American Lung Association, Volatile Organic Compounds (also referred to as VOCs) are one of the top Indoor Air Quality (IAQ) pollutants. These include:

 Biological agents (mold, dust, mites, etc.)  Formaldehyde  Second-hand tobacco smoke  Volatile organic compounds (measured with a PID detector)

Serious, long-term exposure could lead to health affects including leukemia, cancer, eye and respiratory irritations and short term effects such as dizziness, memory loss, and visual impairments.

With the EVM you have the following parameters:

 Range 0 to 2,000 ppm Isobutylene.  Calibrated with Sensitivity 1.0, using Isobutylene. Response varies with each VOC.  Units selection: ppm, ppb, mg/m

(for ppm PID sensor) or µg/m3 (for ppb PID sensor).

Temperature, Relative Humidity, Dew Point

It is important to monitor temperature, control moisture, relative humidity, and monitor dew point levels in occupied spaces such as office buildings, schools, and hospitals, to name a few. With the presence of too much moisture mixed with dirt/dust particles, this can contaminate the environment and enable mold to thrive. High levels of relative humidity (RH) is a contributor of spreading and growing biological pollutants such as molds, mildew, viruses, mites, building dust, and pollen. Failure to control water leakage from humidifiers, refrigerators, and ventilation equipment can also lead to high levels of RH and high Dew Point. For appropriate air quality control, RH levels should be maintained between 30 to 50 percent in a home/office environment. Some of the common side effects include nausea, headaches, running nose, coughing, and difficulty breathing to name a few.

What the Standards Say

Many organizations have studied and analyzed the effects of toxic gas and particulate exposures. As a result, standards were developed to regulate exposure. In the United States, the Occupational Safety and Health Administration (OSHA), the Mine and Safety and Health Administration (MSHA), and the American Conference of Governmental Industrial Hygienists (ACGIH), NFPA (National Fire and Protection Agency), National Institute and Technology (NIST), and American Society of Heating, Refrigeration, and Air-Conditioning (ASHRAE) have all created regulations and limitations on total permissible exposure levels.

International standards are specified by the health and safety regulations such as the European Union (EU) and the European Committee of Air Handling and Refrigeration Equipment Manufacturers (EUROVENT-CEDOMAF). For Canadian standards, the Canadian Standards Association (CSA) specifies air quality guidelines/regulations.

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What the Standards Say

OSHA

http://www.osha.gov

NFPA-654

http:///www.nfpa.org

MSHA

http://www.msha.gov

NIOSH

http://www.cdc.gov/niosh

ACGIH

http://www.cdc.gov/niosh

ASHRAE

http://www.ashrae.org

NIST

http://www.nist.gov

IEC

http://www.iec.ch

CSA

http://www.csa.ca

Resources

To access some of these copyrighted standards, refer to the following:

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EVM Series

 Industrial setting - Used to monitor and ensure health

and safety in settings where toxic fumes are released (such as testing levels at a paper mill or a foundry). This information can be used to identify the source and particle concentrations.

 Sick Building syndrome – Used to evaluate air toxins

and ensure building standards maintain a comfortable work setting.

 Work site assessments.

 Military applications.

 Outdoor monitoring applications include construction

sites/dust outside of mines.

 Regulatory compliance (i.e., OSHA, MSHA, IEC,

ACGIH).

 As a mapping device- Layout a grid of high contaminant

areas, and quickly collect sample data at multiple locations to help identify paths and sources, by relative readings.

 As a survey monitor

 Specific area in a plant/facility – used to maintain a

quality work environment and conduct area monitoring samples throughout an entire facility.

 Specific areas in a plant/facility- used to identify

key areas that may be toxic or unsafe and implement acceptable practices such as changes in the

ventilation.

Time history: manufacturing

Applications

EVM Series

Applications

A real-time, direct reading dust monitor is used in many different applications such as walk-through surveys in manufacturing, wood making plants and/or bakery shops, background sampling, site dust measurements, assessment of the effectiveness of dust control systems, and measurement of indoor air quality (IAQ). It is also used to analyze work-place exposure and help identify dust control techniques such as training or implementing engineering controls.

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EVM Series

Models and Sensors

Optional Sensor Accessories

EVM-7 includes:

 Particulates  Carbon monoxide (CO) or (1) selectable toxic gas

 Selectable toxic gas sensors include:

1. Carbon Monoxide (CO) 2. Chlorine (CL2)

3. Ethylene Oxide (ETO) 4. Hydrogen Cyanide (HCN)

5. Hydrogen Sulfide (H2S) 6. Nitric Oxide (NO)

7. Nitrogen Dioxide (NO2) 8. Oxygen (O2)

9. Sulphur Dioxide (SO2)

 Volatile Organic Compounds with PID ppm or PID ppb sensor

 ppm – parts per million (0 – 2,000 ppm)  ppb – parts per billion (0 – 50,0000 ppb)

 Relative Humidity  Temperature  Carbon Dioxide (CO2)

 Air Probe-10

EVM-4 includes:

 Carbon monoxide (CO) or selectable toxic gas  Relative Humidity  Temperature  Carbon Dioxide (CO

)

 Air Probe-10  Toxic sensor/CO sensor  CO

sensor

 PID sensor  Particulates

EVM-3 includes:

 Particulates  Relative Humidity  Temperature

 Air Probe-10  Toxic sensor/CO sensor  CO

sensor

 PID sensor

Models Explained

The EVM Series simultaneously measures and data logs specific sensors/parameters that were ordered with your instrument. The models, sensors, and accessories are explained in detail below. Refer to the part’s listing for further details (such as calibration accessories).

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EVM Series

Models Explained

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Getting Started

Environmental Monitor (EVM)

USB cable- connects to the external output of the EVM to your PC

DMS software

**Universal Power adapter (External Power supply for EVM)

Sample senor (Your sensors will be calibrated and placed inside the instrument, depending on what you ordered. The sensor type is labeled on the side of the cylinder.)

Example of a cal gas and regulator

HEPA filter/Zero filter for particulate calibrations

PID cleaning kit (for measuring VOCs) (Cotton swabs, cleaning solution, & electrode pellets

Silicone grease (for greasing impactors )

CHAPTER

Checking the Equipment

Getting Started

This chapter is designed to guide you through basic information you will need to begin measuring with your environment monitor.

Checking the Equipment

If your instrument was sent to you in a storage case, remove all the packaging and acquaint yourself with the following equipment.

NOTE: Depending on the accessories you selected, the EVM may have the components displayed in

Figure 2-1. For additional sensors or other accessories, refer to “Replacement parts.”

Figure 2-1: Identifying your equipment

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Display and Keypad

1. Display

2. Backlight

3. Particulate pump

4. Left arrow

5. Run ►/Stop ■

6. Indicators

7. Soft Keys

8. Up arrow

9. Altf key

10. Enter key

11. Right arrow

12. Down arrow

13. On/Off

and Esc

Keypad

Explanation

1. Display

Used to view data, menus, and various indicators.

2. Backlight

Used to illuminate the background of the display screen. (i.e., nighttime study.)

3. Particulate pump

Used for particulate measuring. Toggles the internal pump on and off (used for particulate measurements)

4. Left arrow

Used to toggle through the views and to move left through menu selections.

5. Run/Stop

Used to Run or Stop log session.

6. Indicators

Status information is provided by the instrument at the top of the display.

7. Soft keys

The soft keys are only applicable when a second menu appears above the keys. For example, in the Dust measurement screen, a lookup soft key, a trend menu, and a detail menu appear directly above the soft keys on the display.

8. Up arrow

Used to select menu options (in the setup screens) and select measurement values (or data).

Diagram

Display and Keypad

The keypad is used to run and stop your studies, view your measurement values, select appropriate setup parameters, and power on and off.

Diagram

The following diagram explains the features on the display and keypad.

Figure 2-2: EVM keypad and display explained

Keypad description

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Turning on

Keypad

Explanation

9. Altf key

The Altf key (or Alternate Functions) is used to switch between soft key menu and selected menu. This is an option in various screens (ie, calibration screens).

10. Enter key

Used to open a selected menu. Toggles through selected measurement parameters when viewing measurement screens.

11. Right arrow

Used to toggle through the views and to move right through menu selections.

12. Down arrow

Used to select menus options (in the setup screens) and select measurement values (or data).

13. On/Off/Escape

Used to turn on the EVM, turn off, and to Escape (or move back one screen).

Indicators

 Battery power:  Stop: ■

Start Screen Press the left or right arrow key to toggle through

measurement views.

Menu options

A selected menu is indicated by the shaded text.

Screen descriptions

A note explaining how to access the measurement screens by pressing the right or left arrows.

Start Screen Explanation

Table 2-1: Keypad/user interface explained

Turning on

1. To turn on the EVM, press the On/Off /Esc .

 A TSI splash screen will appear including the firmware version name.  Proceeding the splash screen, you will be viewing the Start screen.

Start Screen Explanation

The main screen you encounter and is referenced throughout the manual is the Start screen. From the start screen, you can access the measurement screens, the setup screen, calibration screens, file system screen (used to view past sessions and clear data), and unit information screen (includes serial number information). (The measurement screens are explained in more detail in Chapter 5.)

1. To select a menu option, press ▲/▼ Arrows and then press Enter

selected menu screen.)

2. To view the measurement screens, press the Right or Left Arrow ◄/► and this will toggle you

through the measurement views.

. (This will open the

Figure 2-3: Start screen defined

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Turning on

Indicator Icon

Explanation

■

Stop – indicates the instrument is currently in the stop status (opposed to run).

►

Run - indicates the instrument is currently logging a session/study.

Battery charge status - This icon shows the renaming capacity of the batteries. A

full battery indicates the instrument is fully charged.

Pause – The pause indicator is shown during the 5 second countdown to prime the airflow prior to entering the run mode when a log session is started.

Overload –will appear whenever the level measurement exceeds the range of the

instrument.

Altf key (Alternate Function key)- this icon appears below the Battery Charge Indicator when alternate functions are being displayed. (For example this is used in the Trend screen to view the time history on the chart.

UnderRange – will appear whenever a level measurement is below the range of the

instrument.

00:00:00

Run Time – displays the current elapsed log session run time. When elapsed time

is less than 100 hours, time is displayed as HR:MIN:SEC. When the elapsed time has exceeded 100 hours, time is displayed as HR:MIN where HR uses 4 digits and MIN uses 2 digits.

Navigating

Once the EVM is powered–on, press the Up/Down Arrow ▲/▼ key to select a

menu or to edit a field.

Press the Left/Right Arrow ◄/► key to scroll through measurement screen, start screen, or to move right or left in a menu (i.e., setup menu).

Press Enter key to open a selected screen (i.e. Setup screen). It is also used to save Setup parameters.

The On/Off/Esc key also functions as a navigational tool and is used to move back one screen (or escape). It can be used if you are viewing a Setup screen, File System screen Calibration screen or Unit Information screen. At any time, you can cancel a set-up change, file system change (etc…) by pressing

the On/Off/Esc key.

Indicators/Icons on the display

The EVM is equipped to notify you of operational/status updates. These indicators (or alert notices) are located at the top of the screen. Table 2-2 explains the function of each indicator.

Table 2-2: Indicators (i.e., run, stop, battery, Altf)

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Getting Started

EVM Hardware Revision

Look-up key

Serial number

Firmware version of other software sub-system

Turning Off

When turning off the EVM, ensure you are in stop mode. A stop indicator will appear on the top left next to the battery charge status icon. If it is in run mode, stop the session and then proceed below.

1. From any measurement view or the start screen, press the On/Off Esc .

2. “3, 2, and 1” countdown will appear as the EVM is powered off. Continue to press and hold until the

instrument is powered off.

 NOTE: To cancel the shutdown process, release the On/Off/Esc key and it will return you to

the screen you were previously viewing (i.e., PM measurement screen).

 Auto-Run Note: If an auto-run session has been set, the auto-run summary screen is

displayed prior to turning off. See section, Auto-Run in Chapter 3.

Instrument Information

The general information screen also called the “unit info” screen is used occasionally to check the type of instrument you purchased and displays the serial number and firmware versions.

Unit Information Screen

 Opening the unit info screen

1. Turn on the EVM by pressing the On/Off/Esc .

2. In the start screen, press the down arrow repeatedly until Unit Info is selected and press

Enter .

The unit info screen will appear.

Figure 2-4: Unit Information screen

3. To view the installed sensors, repeatedly press Enter and it will display the Unit Info screen

with the installed sensors. (See Figure 2-6).

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Instrument Information

Look-up key

Impactor and profile displayed.

Pop-up box

Appears when you press the

Look-up key. Sensors

Select and then press Enter to view the sensor’s parameter

EVM-7

Sensors 1 - 3

Sensors 4 - 7

Unit Information Screen

4. Or press the Look-up key. Then press the ▲/▼ Arrow to select and press Enter to open the

screen. (Repeat this step to view the other sensor.)

5. Unit Info screens are displayed below.

 Screen “A” displays the particulates (PM), temperature (temp), and humidity as “Installed” or

 Screen “B” displays CO

Figure 2-5: Selecting Unit Info. Sensors

“Enabled” sensors.

, CO (or installed toxic sensor), and PID with the associated serial

numbers. Air Velocity is listed as “Not Found” which indicates that the sensor was not installed.

Figure 2-6: Viewing installed sensors

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TSI Detection Management Software DMS

Powering and Outputs on the EVM

TSI Detection Management Software DMS

DMS is a software application designed by TSI that runs under the Windows operating system. You can use DMS for a variety of functions such as: customizing your set-up parameters, displaying data, manipulating data, and creating reports.

Communicating

A USB cable (included in the kit) is used for communicating between the EVM and the software. (First remove the black rubber casing over the ports and then insert the USB cord in the bottom connector.) (See Chapter 6 for more details on software and the EVM.)

Powering and Outputs on the EVM

Battery

The battery is an internal Lithium-ion Rechargeable battery pack. The minimum hours of operating time is 8 hours of continuous operation including setup time, run time, and viewing your result time. This battery is not user accessible or replaceable.

The universal power adapter cord is a 10 to 16 volt power inlet (nominal 12 VDC) with 1.5 amps and is used as an external power source. (For more details on battery power, see “Checking battery power” in

Chapter 3).

Figure 2-7: Communicating with DMS via USB cable

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Communicating

Power jack

Analog & Digital Outputs

USB port

Powering and Outputs on the EVM

Charging

The rechargeable battery pack is charged by plugging in the universal power adapter cord into the charging-port and into an electrical outlet. When using the EVM and the power adapter, it will charge as you use the instrument. The estimated time to recharge a fully discharged battery pack is approximately five hours. It is important to understand that the USB connection/cable will not charge the internal battery. USB is used for communication purposes only.

 NOTE: When the batteries are depleted and if you are charging the instrument, the temperature

sensor will read at a higher level. Thus, it is recommended to measure the temperature when you are not charging the instrument.

About the Environment

If the environment you are in is above 40º C (104º F) when charging the battery then you will be unable to charge the battery. (See Appendix D for screen warnings.)

Outputs

The digital output and/or analog output can be used to connect to external devices such as a chart recorder or a light notification device. The monitor’s digital out and analog out channel are accessible through the Input/Output connector. The air velocity wand also uses this connector. (The following diagram depicts the backside of the instrument without the back cover and the black rubber casing removed.) For more information on connecting and using a stereo plug, see Appendix D.

Figure 2-8: USB, power jack and digital output port

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Setting up the Environmental Monitor

CHAPTER

Setting up Parameters via the Keypad

Setting up the Environmental Monitor

The focus of this chapter is to address all of the setup options available on the Environmental Monitor (EVM). Once your parameters are selected, refer to the Calibration chapter (see Chapter 4).

 NOTE: If you are using DMS, you may want to program all of your settings via the software. The

program allows you to save setups and apply them for future measurements/tests. Refer to

Chapter 6, for DMS details.

Setting up Parameters via the Keypad

The following user-adjustable setup screens are explained will appear for all instrument models:

 Time and date screen  Battery power check screen  Logging screen includes selecting the logging interval, averaging time, and logged measurements  Display settings include: key clicks, language, and display contrast features  Setting up Input/Output (I/O) options including digital-out, air velocity, or analog-out

If you ordered the EVM-7 model, a Particulate setup menu and a PID setup menu will also appear.

Time and Date Setting

The EVM uses a 24-hour clock (military time) and specifies date by day, month, and year. The date and time setting are important elements used as you are analyzing your log data results.

 Changing time and date settings

1. Turn on the EVM by pressing On/Off/Esc

 The Start screen will appear (see Figure 3-2 for details).

2. Ensure Setup is highlighted and press Enter

3. In the Time/Date screen, press the ▲/▼ Arrows to select Time field or Date field. (Note the Day

field will update automatically based on the selected day from the date field.)  NOTE: It will be highlighted when selected.

4. Press Enter

5. To change the field values, press ▲/▼ Arrows. To move to the next field, press the right/ left

arrow key. Repeat this step as necessary.

 To return to the first column field (Time, Date, or Day), repeatedly press Enter

On/Off/Esc

. (The Setup menu will appear.)

to move to the update fields (2nd column).

to cancel session.

or press

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Setting up Parameters via the Keypad

Time

Date

Day – auto fills based on what you entered in the Date field

Checking Battery Power

6. Continue to repeat steps 3-5 until all changes have been made.

Figure 3-1: Time-Date screen parameters

7. Press the On/Off/Esc

 Remember, once you return to the start screen, you can press the right or left arrows to toggle

through the measurement screens.

Checking Battery Power

The battery power is supplied by an internal lithium-ion rechargeable battery pack with a minimum of 8 hours of continuous operation.

 NOTE: The battery pack is not-user replaceable and would need to be changed at TSI or your

authorized dealer.

The battery screen is used to determine the battery capacity status. When operating from the battery, you can check the remaining capacity of the battery pack at any time by accessing the Battery screen. Additionally, a battery indicator will be present on all screens to notify you of the remaining battery capacity. If the battery indicator is at 100%, it will look similar to the Figure 3-3 below.

If you are charging the battery, the battery screen will display “battery is charging” with an updating indicator bar. The battery power percentage will update accordingly.

twice to return to the start screen.

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Setting up Parameters via the Keypad

Start screen

Highlighting indicates “Setup” menu is selected

Measurement screens

Press right or left arrow to view

Battery indicator has all bars representing fully charged battery

Indicates remaining battery capacity

Checking Battery Power

 Check battery power

1. From the start screen, highlight Setup (by pressing ▲/▼ Arrows) and press Enter

 NOTE: If viewing a measurement screen, press the right/left arrow until the start screen

appears.

Figure 3-2: Start screen

2. Repeatedly press ▲/▼ Arrows until Battery is selected.

3. In the Battery setup screen, it will display the remaining capacity on the battery pack.

4. To return to the Start screen, press On/Off/Esc

twice.

Figure 3-3: Battery screen

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Setting up Parameters via the Keypad

Display settings

Explanation

Language

With the language setting, there are six options including: English, Spanish, German, French, Italian, and Portuguese.

Contrast

With the contrast setting, you may want to adjust the shading of the display (or screen contrast) by darkening or lightening the screen to fit the environment you will be operating the instrument in. The contrast setting ranges from 1-12 in which 12 represents the darkest and 1 represents the lightest.

Key Click

With the key click setting, you can turn the sound to “on” and each time you press a key on the keypad you will hear a soft click sound. This can be disabled by choosing the “off” setting.

Display fields

Select the field (via up/down arrows). Press Enter. To change 2nd column, press up/down arrows.

Display: Language, Contrast, and Key Click

In the display screen, there are three selectable settings including language, contrast, and key click.

Table 3-1: Display settings explained

 Changing language, contrast, and key click settings

1. From the start menu, press ▲/▼ Arrows to select Setup and press Enter

2. Repeatedly press the ▼ Arrow to select the Display menu and press Enter .

3. To select a field in the display screen, press ▲/▼ Arrows to select one of the fields. Press Enter to move to the 2

4. Follow the fields that apply:

 To change the Language, press ▲/▼ Arrows to select a specific language. Press Enter

to move back to left column or escape to cancel selection.

 To change the Contrast, press ▲ Arrow repeatedly or press ▼ Arrow repeatedly to

decrease the contrast setting. Press Enter cancel selection.

 To change the Key click sound setting, press ▲/▼ Arrows until On/Off is displayed. Press

Enter

column (changeable field).

to move back to the left column or escape to cancel selection.

to move back to left column or escape to

Figure 3-4: Screen display settings

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Setting up Parameters via the Keypad

Log intervals

Explanation

Log interval

This sets the log interval between specific data points. For example, if logging is set to 5 second intervals, then all parameter values are logged every 5 seconds. The logging parameters options are as follows: 1 second,5 seconds, 15 seconds, 30 seconds, 1 minute, 5 minutes, 10 minutes, 15 minutes, and 30 minutes, and 60 minutes.

Averaging

The Averaging parameter is used to average all measurements displayed on the screen. If averaging is set to 15 then the last 15 measurements are averaged. (New measurements are updated every second.) This averaged value is displayed on the monitor. It’s basically a data filter. The averaged data will change less rapidly than the 1 second data since it is averaged. The user options are 1 – 30 with increments by 1 interval.

 NOTE: 15 second averaging is recommended for the average setting. All

the sensors have settling times of 10 seconds or longer.

Measurements

Selectable logged measurements: Level, Lmin, Lmax, Lavg, and STEL.

If the measurement is set to “On”, this indicates the instrument will log data at the logged interval (i.e., while in run mode). “Off” indicates the measurement

will not log when in run mode.

The measurements include the following: Level (instantaneous or averaged measurement), STEL (short term exposure level calculated over last 15 minutes), Lmax (maximum measurement during log interval), Lmin (minimum measurement during log interval), Lavg (average measurement during log interval), and TWA (time weighted average measurement during interval).

 NOTE: See “Table 5-3” for more information.

Run Time

Depending on the logged parameters that are turned “On” for data log and the log interval, the Estimated Run Time screen will display the total remaining run time. For example, if you want to log all parameters the overall run time will decrease significantly. If you would like to extend the run time to a longer duration, logging one or two parameters would be advisable.

Setting Logging and Viewing Run Time

5. To return to the Start screen, repeatedly press On/Off/Esc .

Setting Logging and Viewing Run Time

With the logging screen, you select the logging interval (i.e., 1 min. data logging), the averaging parameter (i.e., a type of data filter) and which parameters will be logged and stored into memory. An optional field, Run Time, allows you to view the amount of remaining log time when logged parameters are selected.

For logging, there are two selectable fields- the logging interval rate and the measurement averaging.

Table 3-2: Logged intervals and selecting logged measurements

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Setting up the Environmental Monitor

Logging time/averaging time

Logging attributes/measurements

Run Time

When selected, the estimated run time screen displays the total remaining time.

Setting up Parameters via the Keypad

 Set logging intervals, logging attributes, and view run time

1. From the start menu, press ▲/▼ Arrows to select Setup and press Enter . Select Logging

and press Enter

2. To change Logging Interval or Averaging follow below:

 Press ▲/▼ Arrows to select Logging interval or Averaging.

 Press Enter  Press Enter

to move to the changeable field, and then press ▲/▼ Arrows.

to return to the 1st column and save your settings.

3. To enable/disable logging, follow below:

 Select a measurement by pressing ▲/▼ Arrows.  Once selected, press Enter

(this will move your cursor to the “On/Off” field.)

 Press ▲/▼ Arrows to toggle and select On or Off.  Press Enter

again to return to the measurement.

 Repeat step 3 until all logging parameters are enabled/disabled.

Figure 3-5: Logging screen

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Setting up Parameters via the Keypad

Estimated run time

**NOTE: To increase the total duration, log

only one or two measurements and/or change the log interval.

PID Sensor Setup

4. Optional: To view the Estimated Run Time, select this field (by pressing ▲/▼ Arrows) and press

Enter . The estimated run time screen will appear.

 NOTE: To extend the logging time, turn a logged measurement(s) to “Off” and/or change the

5. Press On/Off/Esc repeatedly to return to the Start screen.

PID Sensor Setup

For best PID testing results, it is recommended to add a correction factor to the relevant VOC you intend to measure. Refer to the PID correction factors table in Appendix C for more details.

Additionally, the PID setup screen is used to set the ppb zero cal to either enabled or disabled (if applicable).

log interval. Then, re-check the estimated run time.

Figure 3-6: Estimated run time for logging screen

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Setting up Parameters via the Keypad

PPB Zero Cal

Press up/down arrows to select either enabled/disabled. Press Enter to save.

PID Factor

Press up/down arrows on keypad to change value. Press Enter to save.

Default soft key

Press to restore PID factor to default (“1”).

PID and correction factor

The applied correction factor “3.5” is displayed in the Gas measurement screen.

PID and correction factor

Displayed in the Composite

measurement screen.

PID Sensor Setup

 Setting PID correction factor and/or ppb zero cal

1. From the start menu, press ▲/▼ Arrows to select Setup and press Enter

2. Select PID by pressing ▲/▼ Arrows and press Enter

3. In the PID screen, select either ppb zero cal or the PID factor by pressing ▲/▼ Arrows.

4. Press Enter

Arrows to change the value. Press Enter

5. Press On/Off/Esc

to move to either the disabled/enabled field or the value field. Press ▲/▼

repeatedly to return to the start screen.

Figure 3-7: PID correction factor/ppb setup

to save your changes.

 NOTE: When changing PID factor to a value excluding “1”, the PID correction factor will

appear as a subscript on the measurement screens. Two samples are displayed below:

Figure 3-8: PID correction factor displayed on measurement screens

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Setting up Parameters via the Keypad

Units

Temperature Particulate Measurements, PID, or Air Velocity.

Screen message

Press the Enter

key to save the changed

setting.

Changing Units (Temperature, Particulates, PID, and Air Velocity)

In the units screen, the temperature, particulates, and the air velocity values can be displayed in different measurement units.

 Temperature’s setting is either Celsius (ºC) or Fahrenheit (ºF) with ºC as the default.  Particulates setting is either in mg/m

meter).

 PID PPM/PPB sensor (VOCs) setting is either PPM or mg/m  Air velocity setting is in meters per second or feet per minute.

NOTE: If you do not have an air velocity sensor connected, it will not be displayed in this screen.

 Changing temperature, particulates and/or air velocity units

1. From the Start screen (see Figure 3-2 for details), select Setup and press Enter

2. In the Units screen, press ▲/▼ Arrows to select the Temperature, PM (Particulates), or

Air Velocity field.

3. Once selected, press Enter

4. Press ▲/▼ Arrows to select the appropriate unit.

5. Press Enter

to save and move back to the first column.

6. To return to the start screen, press On/Off/Esc

(milligrams per cubic meter) or µg/m3 (micrograms per cubic

. PPB or μg/m3.

to select the units field.

twice to return to the screen.

Setting up Particulate Settings

There are four parameters in the particulate screen which include:

 Particulate field- enables and disables when measuring particulates. (If disabled, it will not enable

the pump during run mode.)

 Profile field – used to select the active particulate profile. The active profile can be edited by

pressing the edit quick key.

 Gravimetric Mass and Gravimetric volume fields – displays the accumulated theoretical

particulate mass and air volume which has passed through the gravimetric filter (since the last gravimetric reset). These can be reset by pressing the reset quick key.

Figure 3-9: Units screen

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Setting up Parameters via the Keypad

Setting Profiles (Particulate Correction Factors)

The EVM supports eight different particulate matter (PM) profiles with customized name settings and user correction factor settings. When the profile field is selected from the particulate menu, you are able to edit this field by pressing the Edit soft key. Once opened, you can change the profile name and correction factor setting. (NOTE: Each profile stores up to four calibration verifies.)

1. Profile Name: You can change profile name and assign up to eight characters.

2. Factors: A user will have different correction factors based on the type of dust you are measuring.

How Particulate Factors are Adjusted and Calculated

All particulate profiles are factors are calibrated to Arizona Road Dust (ARD) with its particle size and composition. Other dust compositions can be measured accurately by adjusting a profile’s correction factor.

 NOTE: For best measurement results, it is recommended to enter in the dust correction factor prior

to your particulate study. (This may require a gravimetric sampling.)

To calculate a correction factor, follow the guidelines below:

1. Run the instrument in the applicable environment for a set period of time/volume (i.e., 6–8 hours).

 Accumulators:

 The gravimetric mass accumulator will display the amount of dust accumulated based on

the active profile.

 The gravimetric volume accumulator will display the amount of volume passed through the

gravimetric filter.

2. After the run, check the gravimetric mass accumulator, compare to what was actually measured

from the lab, and enter in a correction factor.

 For example, before measuring ensure the gravimetric accumulators are reset and the

gravimetric filter is replaced. Next, you measure for four hours and the gravimetric accumulator is displayed as 10 mg. Then, you measure the dust in the gravimetric filter (or cassettes) and determine the actual weight. If the actual weight is 20 mg, you would change the correction factor from 1 to 2.

Dust Correction Factors (Profiles)

When setting up the particulate parameters, it is good to keep in mind that the user defined profiles (or correction factors) are a submenu of the particulate menu. Because of this layout, the following section explains how to change the profiles/correction factors and apply a new profile.

 Setting dust correction factors (profiles)

1. From the Start screen, select the Setup menu by pressing ▲/▼ Arrows and press Enter

2. Press ▲/▼ Arrows repeatedly until Particulate is selected and press Enter

setup screen will appear.)

3. Ensure Particulate is set to Enabled. (If not, press ▲/▼ Arrows to enable and press Enter

to return to the first column.)

. (The particulate

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Setting up Parameters via the Keypad

Profile Select this field and then press Edit soft key to modify the Profile screen.

Edit soft key

Visible when profile menu item is highlighted

Profile name Optional: customize the profile name

Factor

How Particulate Factors are Adjusted and Calculated

4. Select the Profile field by pressing ▲/▼ Arrows and press the Edit soft key.

Figure 3-10: Edit profiles for dust calibration

5. Press the Edit soft key and the Edit Profile screen will open.

6. (Optional, see step seven if not changing profile name.) To change the name of the profile, ensure

the profile field is selected and press the Enter . Press ▲/▼ Arrows to change the characters. To move to the next position, press ◄/► Arrows then press Enter .

7. Press ▼ Arrow to select the Factor and press Enter

Arrows to change the numeric value. Press the left/right arrow key to move to the next position. Continue this process until the appropriate number is selected and press Enter to confirm or Esc key to cancel changes.

8. Press the On/Off/Esc

9. To apply a new profile, select the profile field and move to the second column (by pressing

Enter .) Then continuously press ▲/▼ Arrows until the appropriate profile/correction factor is

selected. Press Enter

10. Press On/Off/Esc twice to return to the start screen.

Figure 3-11: Entering a profile for particulate calibration

to move to the 2nd column. Press ▲/▼

to return to the particulate screen.

to return to the first column.

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Setting up Parameters via the Keypad

Reset soft key

Visible when grav. mass menu item is highlighted

Displays accumulated particulate mass & volume

Particulate Pump: Enable or Disable

You may want to disable the particulate pump for situations in which the environment is too dirty for the particulate optical engine or if you want to keep the engine and pump clean and dry from oily mists, liquids, or fogs elements. Additionally, you may want to log other parameters, such as CO2, Toxic, and/or temperature and humidity parameters and exclude the particulate measurements from a log session. This is changeable in the particulate screen.

 Enable/Disable the pump

1. From the Start screen, select the Setup menu by pressing ▲/▼ Arrows and press Enter

2. Press ▲/▼ Arrows repeatedly until Particulate is selected and press Enter

setup screen will appear.)

3. To enable/disable the particulate setting/pump, ensure Particulate is selected and press

Enter .

. (The particulate

4. Press ▲/▼ Arrows to select either Enabled or Disabled and press Enter

to view a sample screen.)

5. Press On/Off/Esc twice to return to the start screen.

Resetting the Gravimetric Filter

The Gravimetric accumulators display the calculated accumulated mass of particles and the accumulated volume through the gravimetric filter (since the last time these accumulators were reset). At the same time, the particles are actually collected in the gravimetric cassette in the back of the unit. Typically the gravimetric accumulators are reset when the gravimetric cassette is replaced by the user.

 Resetting gravimetric filter

1. From the Start screen (see Figure 3-2 for details), select Setup by using ▲/▼ Arrows. Press

Enter .

2. Press ▲/▼ Arrows to select the Particulate screen and press Enter

will appear.)

3. To reset the Gravimetric filter, select the Grav. Mass/Grav. Volume fields by pressing ▲/▼

Arrows. Once selected, the Reset soft key will appear. Press this soft key to reset.

. (Refer to Figure 3-7

. (The particulate screen

Figure 3-12: Particulate setup screen

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Setting up Parameters via the Keypad

Digital Out/Logic

Explanation

Active High Pulse

The output will assert an active high pulse for approximately 50 msec when the threshold is exceeded.

Active Low Pulse

The output will assert an active low pulse for approximately 50 msec when the threshold is exceeded.

Active High

The output will be at a logical high level when the threshold is exceeded.

Active Low

The output will be at a logical low level when the threshold is exceeded.

Threshold

Enter in a value to trigger the external device to turn on or off.

Auxiliary Input/Output

4. To return to the main menu, press On/Off/Esc twice.

Auxiliary Input/Output

Digital Output

With the digital output function, the user can connect an external device to the monitor. This can be used to signal a specific level to turn on a notification device, an LED, or a fan motor at a specific threshold (or set point). Once enabled, the following three are selectable parameters: a sensor, logic setting, and threshold setting.

Sensors

When setting the Digital Output (“Digital-Out”) parameters, one of the seven selectable sensors is used to trigger the output of the external device which includes:

 RH (relative humidity), CO

(for measuring VOCs), Toxic gas (i.e, CO), and Dew Point.

 NOTE: Air Velocity cannot be selected as a sensor.

Logic and Threshold

There are four selectable “Logic” types which is used in combination with the Threshold field to trigger on and off the external device. These are explained in the table below.

 NOTE: The digital output is an open collector output and as such requires the user to install a pull-

up resistor.

(Carbon Dioxide), Temp (Temperature), PM (particulate matter), PID

Table 3-3: Digital out/Logic settings

 NOTE: The system maintains a hysteresis window around the threshold to prevent output chattering.

 Setting or changing digital output

1. From the Start screen, select Setup menu and press Enter

2. Press ▼ Arrow repeatedly until Aux I/O and press Enter

3. Select Digital Out and press Enter

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Digital Output parameters

Auxiliary Input/Output

4. In the Digital-Out screen do one of the following:

 Dig-Out field: select via ▲/▼ Arrows and press Enter

Enable/Disable.

 Sensor field: select via ▲/▼ Arrows and press Enter

one of the sensors.

 Logic field: select via ▲/▼ Arrows and press Enter

of the triggering modes.

 Threshold field: select via ▲/▼ Arrows and press Enter

a value.

. Press ▲/▼ Arrows to

. Press ▲/▼ Arrows to select

. Press ▲/▼ Arrows to select one

. Press ▲/▼ Arrows to select

5. To return to the Start screen, press the On/Off/Esc

Figure 3-13: Configuring digital output

twice.

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Setting up Parameters via the Keypad

Air Velocity – disable/enable

0 1 2 3 4 5 6 7 8 9 Hours

0 Volts

60 ºC 40 20 0

Air Velocity

Setting the air velocity parameter is fairly simplistic; however, ensure no other outputs are enabled prior to setup. (The EVM will display a pop-up message if more than one output is enabled. You will have to disable all other auxiliary outputs before proceeding with air velocity setting.) When air velocity is “enabled”, you can measure/log with the TSI Air Probe10 (optional accessory).

 Setting air velocity

1. From the setup screen, select Aux I/O and press Enter .

2. Press ▲/▼ Arrows to select Air Velocity and press Enter . To change the setting from either enabled or disabled, press Enter .

3. Press ▲/▼ Arrows to change the setting.  NOTE: If you have either the digital-out or analog-out setting enabled, a pop-up message will

4. Press On/Off/Esc twice to return to the start screen.

Analog-out

The analog-out channel provides a voltage reading that is proportional to the sensors output. The analog-out channel can be configured to track any installed sensor. The example displayed in Figure 3-12 shows the results of measuring with the thermometer from 0 to 60ºC reading from 0 to 5 volts.

Figure 3-14: Air Velocity setting

appear explaining to change the other settings before enabling air velocity.

Figure 3-15: Analog out results with temperature as output

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Setting up Parameters via the Keypad

Disable/Enable Analog-out field

Select a Sensor

Restoring Default settings

Select either (or both) to restore all factory cals/settings.

Restoring Default Factory Settings

 Setting Analog-Out

1. From the setup screen, select Aux I/O and press Enter .

2. Press ▲/▼ Arrows to select Analog-Out and press Enter .

3. To enable or disable, press Enter change the setting. Press Enter

4. To select a sensor, ensure Sensor is selected and press Enter . Then, press ▲/▼ Arrows to page through the selection list. Once the appropriate sensor is selected, press Enter .

5. To return to the start screen, press On/Off/Esc twice.

Figure 3-16: Analog-Out screen

Restoring Default Factory Settings

The EVM is equipped to restore all factory settings and factory calibration settings via the Defaults screen.

 NOTE: Dew Point and Air Velocity are not user calibrated and therefore, not listed in the restore

factory calibration screen.

1. In the Setup menu, press ▲/▼ Arrows until Defaults is selected (or highlighted).

2. Press Enter

(to open the screen).

when Analog-out is selected and press ▲/▼ Arrows to

to move back to the 1st column.

Figure 3-17: Defaults screen (restoring factory settings)

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Setting up Parameters via the Keypad

Restoring Default Cals

Select a sensor, Choose Yes or No with the screen prompt and press Enter key.

Restoring Default Factory Settings

3. To restore the Factory Calibration, ensure this is selected and press Enter

 To restore defaults for a selected sensor(s), select a sensor using ▲/▼ Arrows and press

Enter . In the pop-up screen, select “Yes” via the Left Arrow (or No to cancel) and press Enter .

 Repeat as necessary to restore each selected sensor.

 To restore all sensors, select All Sensors (via up/down arrows) and select Yes in the pop-up

screen (or No to cancel). Press Enter .

Figure 3-18: Restoring default calibrations

4. To restore the Factory Settings, press ▲/▼ Arrows to select and press Enter

 A Restore Factory Settings pop-up screen will appear. Press either Yes or No (with ◄/►

Arrows and Enter

to confirm).

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Setting up Parameters via the Keypad

Backlight key

Press to turn on. This feature has three levels (off, dim, bright).

Backlight Setting

A key on the keypad is dedicated to turning on or off the backlight feature. When turned on, the backlight will illuminate the screen from a dark gray to a light gray color. This feature has two levels of brightness.

When turning on, click the backlight key once for a lighter backlight. Press a second time for a darker contrast.

To turn off, repeatedly press the backlight key until it is turned off.

Resetting the EVM

At times, you may need to reset the instrument if it is unresponsive.

1. To manually reset, press and hold On/Off/Esc for about 8–10 seconds and the instrument will power off.

Lock/Secure Run and/or Setup

The lock or security feature is designed to lock the EVM during a run to ensure the session will not be stopped unless the lock feature is disabled. Likewise, this feature includes a locked (or secure) setup mode which will stop you from editing a set-up. Once one or both of these options are programmed with a code, it is set by pressing the Lock soft key in the Setup menu.

 NOTE: When securing or locking the instrument, it will be in lock mode even when powered off/on.

Figure 3-19: Backlight key

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Setting up Parameters via the Keypad

Lock

Opens to the Lock screen.

Adding a numeric password

 Press Up/Down arrows to enter a number.  Press Left/Right arrow keys to move to the next

field.

 Repeat as necessary.

Lock/Secure Run and/or Setup

 Setting lock setup or run

1. From the Start screen, select and open the Setup screen.

2. Press the Lock soft key.

Figure 3-20: Lock Soft key

3. In the Lock/Security Modes screen, Run and Setup are “disabled” as the default setting.

4. To enable either one, first select Run or Setup fields (by using Up/Down Arrows).

5. Press Enter

and the first field will be shaded/selected, and then press ▲/▼ Arrows to

change the numeric value.

6. Repeat step 5 until the password is entered. When you press Enter for the fourth digit, a secure run mode or secure setup pop-up will appear as confirmation. Once set, the field will display “Enabled”.

7. Once enabled, follow one of the scenarios below:

 For Secure run mode to occur, navigate to one of the measurement screens and press the

Run key. A “Secure Run Mode” screen will appear.

 For Secure setup mode to occur, navigate to the setup screen and the “Secure setup mode”

screen will appear.

Figure 3-21: Setting lock/secure

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Setting up Parameters via the Keypad

Auto-Run and Timed Run setting

 Select Timed-run by pressing Enter and then

press Up/Down arrows to move through the menu.

Timed Run soft key

 Select first soft key to access the Timed run screen

Unlock run and/or setup

When in secure run mode or secure setup mode, a quick press of the lock/unlock soft key and entering in the password will unlock the instrument. (See steps 5 and 6 above to for more information on entering in the password.)

 NOTE: If the entered password to unlock the instrument was forgotten, a default TSI password can

be used in lieu of the entered password, “9157”.

Auto-run

The EVM has four programmable auto-run settings including a timed-run, a date, a day of week (DOW), and a disabled mode.

The EVM is shipped with the auto-run set to the disabled mode. Each mode has more than one setting and is denoted by the “+” (plus) or “–”(minus) soft key symbols. When an alarm is activated (or programmed), a “+” (plus) sign appears. The default alarm mode is set to an off mode and is denoted via a minus symbol (i.e., “–”).

Auto-run and timed-run mode

With timed-run, you manually start the run (via the run key), and it will automatically stop based on the programmed duration.

 Setting auto-run with timed-run mode

1. From the Start screen, select and open the Setup screen.

2. Select Auto-Run by pressing ▲/▼ Arrows and press Enter

3. In the Auto-Run screen, press enter to select Timed-Run. If it is not displayed, press ▲/▼

Arrows repeatedly until selected.

4. Next, press the -ONE soft key or select View/Set Parameters.

Figure 3-22: Selecting auto-run with timed-run mode

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Setting up Parameters via the Keypad

Duration

 Select the hours/minutes/seconds with up/down

arrows and press Enter to move to the next field.

Soft keys

 Select a soft key to setup the Date Auto-Run

parameters

 Once set, “-one” will appear as “+one” which is

turned on.

Auto-run

5. In the timed-run screen, press Enter

to select the duration field which is displayed in hours, minutes, and seconds. To change the duration, press ▲/▼ Arrows. To move between the fields, press ◄/► Arrows. (Repeat as necessary).

Figure 3-23: Setting timed-run and duration

6. Press Enter

to save your settings.

 NOTE: To begin the Timed-run, press the run/stop key and the instrument will automatically

stop at the programmed duration.

Auto-Run with Date Mode

With the date mode, it will wake up the instrument from a powered down or on condition, runs the study, saves it, then powers down again. Up to four date settings are programmable with a specified date, time (in hours, minutes, seconds), and duration via the soft keys.

 Setting auto-run with date mode

1. From the Start screen, select and open the Setup screen.

2. Select Auto-Run by pressing ▲/▼ Arrows and press Enter

3. Press Enter

to select the 2nd column (value field) and press ▲/▼ Arrows repeatedly until

Date appears.

4. Next, press one of the soft keys. (This will open a Date/Auto-Run screen.)

Figure 3-24: Selecting auto-run with date mode

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Setting up Parameters via the Keypad

Start time

Select time of day (24 hour clock) by pressing up/down arrows

Corresponds to soft key

Auto-Run with Date

Select day, month, year

Duration

Press up/down arrows to select hours, minutes, seconds

Auto-run

5. If off appears under Auto-Run, press Enter

6. To change the fields press ▲/▼ Arrows. To move to the next field(s) press ◄/► Arrows.

(or skip and see step 6).

Repeat as necessary.

Figure 3-25: Setting auto-run date mode

7. To save, press Enter

key. Press key until you return to the start screen.

 NOTE: To initiate the programmed run, either power down the instrument or leave on.

Auto-Run with Day of Week (DOW) Mode

The days of the week (DOW) setting is a pre-programmed weekly auto-run with a specified day, start time, and duration with two auto on settings. The programmable settings include a day of the week, start time, and duration.

 Setting auto-run with day of week mode

1. From the Start screen, select and open the Setup screen.

2. Select Auto-Run by pressing ▲/▼ Arrows and press Enter

3. In the Auto-Run screen, press Enter and press ▲/▼ Arrows repeatedly until DOW appears.

4. Press one of the soft keys (one or two).

5. In the DOW Auto-Run screen, press ◄/► Arrows to move through the Days, Time and Duration

fields. Press ▲/▼ Arrows to change the value.

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Days

Optional Programming is set from Sunday through Saturday. Example displays Monday through Friday

S (hours:mins:secs)

Start time is programmed at 8 am

D (hours:mins:secs)

Duration is programmed for 4 hours

Auto-run

6. When programmed, press Enter

Figure 3-26: Setting auto-run DOW mode

. Press key repeatedly to return to the main screen.

 NOTE: To initiate the programmed run, either power down the instrument or leave on.

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Calibrate Sensors

Manifold

Sensor housing

CHAPTER

Placement and Calibration of Sensors

Calibrate Sensors

Placement and Calibration of Sensors

Before you begin your measurement sampling, it is recommended to calibrate the sensors you will be using. This chapter focuses on inserting and removing sensors, calibrating each sensor, viewing past calibrations, and how to verify your calibration set points. (Reference the following sections which apply to your installed sensor components.)

Calibrating sensors include:

 Particulate sensor  Pump flow rate calibration  CO  Toxic sensors  Photo-Ionization Detector (PID) sensor (for VOCs)  Temperature (temp) and Relative humidity (RH) sensors

Inserting and Removing Sensors

1. The sensors you purchased with your EVM will be inserted, factory calibrated, and ready for usage.

 Inserting sensors

2. Ensure the instrument is turned off and the external power cord is disconnected. Next, remove the

3. Lift the cover off and set aside. (The location of the sensors is indicated in Figure 4-2.)

4. Remove the black manifold casing.

and O2 sensor

To understand how to insert or replace a sensor this is discussed in the procedures below.  NOTE: To order new sensors when expired, see Appendix A, Replacement and optional parts.)

sensor bar by unscrewing two screws from the top compartment with a screw driver.

Figure 4-1: Sensor housing and manifold

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Air inlet cover

Screw 1

Dial-in Impactors

Toxic sensor

Sensor bar- Remove screw 1 & screw 2

and lift off cover.

Temperature/ Relative Humidity sensor

(Dry bulb thermometer measures ambient air temperature)

Screw 2

PID sensor

CO2Sensor

Calibrating Particulates

5. To insert a sensor, gently push the sensor’s pins into the socket pin of the circuit board so it aligns

accordingly. It will fit securely.

6. To remove a sensor, pull the senor up horizontally and remove it from the sensor chamber.

7. When completed, replace the black manifold over the sensors and then place the cover over the

sensor housing. Tighten the screws back into place.

Calibrating Particulates

 NOTE: The Temperature/ Relative Humidity sensor is not user removable.  NOTE: The user will receive a message on the display when a new sensor is detected or an

The EVM is factory calibrated to the “Arizona Road Dust” (also called “ISO Road dust” ISO 12103-1 A2 Fine) standard.

Before you measure particulates, it is recommended to calibrate to the environment you are in. If you are in an ARD environment, you would adjust the impactor to correlate with a specific particulate setting, run a calibration based on the particulates in that environment, and compare the results against the ARD calibration. If you are in any other environment, you would calibrate based on the environment you are in by determining a correction factor (also called “K-factor”) to the correct variation from the ARD calibration standard.

Figure 4-2: Sensors’ locations

existing sensor is no longer detected.

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2. Pump – circulates the air through the tubing

1. Filters through impactor

3. Passes through optical engine

4. Collects in Grav. filter/cassettes

Impactor and use

The EVM supports eight different user profiles. Each profile stores a customizable profile name field, and a correction factor. (Setting-up profiles/correction factors is discussed in the Set-up chapter, “Setting profiles for particulates”).

The following sections will walk you through how the impactor operates, how to adjust the impactor, how to run a zero calibration, and lastly running a gravimetric calibration.

Impactor and use

The impactor is a device used to remove larger sized particulates from the air-stream you are measuring.

How does it operate? Air travels through the impactor and the heavy particulates will stick to the greased plates within the impactor (1). The Pump will circulate the air as it passes through the tubing in the back of the instrument (2). The smaller, lighter particulates will pass through the optical engine (3) and collects in the gravimetric filter/cassettes (4).

Figure 4-3: How the impactor functions

 NOTE: Depending on the environment (i.e., a dense, dusty manufacturing plant), you will want to

ensure the impactor is well greased and cleaned before using. Additionally, it is recommended to monitor this process while measuring. You may need to stop your measurements, clean and grease the impactors, and then resume measuring. To clean and grease the impactors, see Chapter 7 “Cleaning and maintenance”.

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PM 2.5 & profile displayed

Impactor setting updates as the turret is rotated (when in stop mode)

Adjusting the Impactor/Turret Setting

When measuring, the industrial processes (such as sanding, cutting, crushing, grinding, and transportation) cause air pollutants. The size of the particles will enter the human body in different areas, affecting the nasal, throat, and/or lung area.

The impactor setting is used to trap and filter out the larger size particles based on your cut-point (or impactor setting). The range is programmed between 1 μm to over 100 μm. For example, if you are measuring coal dust (aimed at the lung area), you would adjust your impactor setting to PM10. The following are the user-selectable cut-points:

 PM2.5, PM4, PM10, or PM (all dust ranging from 0 μm-100 μm)

 NOTE: The particulate size is written on top of the turret. For PM there is no marking but is noted by

the (raised) air chamber.

 Adjust impactor/turret for particulate logging

1. Using the keypad navigate to the particulate or composite measurement screen.

 How to? From the Start screen, press the Right arrow key.

Figure 4-4: PM2.5 impactor setting example

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Air inlet hole for PM2.5

Air inlet hole for PM4

PM2.5 position

PM4 position

Air inlet hole for PM10

Air inlet hole for PM

PM10 position

PM position (no text marking)

Position used for zero calibration

Particulates Calibration (Zero Cal)

2. Twist the turret (red casing around the impactor) to the left or right until you see the appropriate

setting on the display. It will align to the impactor text and arrow on top of the housing.

 NOTE: The actual diameter of the air inlet hole is directly to the left of the impactor text positioning.

Figure 4-5: Adjusting impactor/turret setting

3. If you see “< >PM ERR”, this indicates the impactor is not in the correct position and that it is

between two positions. Adjust the turret, until the correct reading is displayed on the screen.

Particulates Calibration (Zero Cal)

A zero calibration is recommended the first time you measure particulates in the run mode. For particulate calibration, place a zero filter (also called a HEPA filter) with attached coupler into the vent of the turret. The impactor setting must be set at PM in order to conduct a zero cal.

 NOTE: For the span on the particulate calibration, refer to the

“Gravimetric Filtering” instructions to determine the gain factor from the correction factor.

 Particulates zero cal

1. Insert the attached coupler and zero filter into the turret. Ensure the impactor is well-greased

before calibrating which requires a thin film of grease. (See “Impactor care” for details).

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Zero/HEPA filter

Used for particulate zero cal.

Zero filter with coupler and vent opening

vent opening.

Turret

the EVM. The raised section will align with the “impactor” text.

Calibration – select to open to the Calibration set screen

Particulates Calibration (Zero Cal)

Figure 4-6: Particulate zero cal with HEPA filter

2. Adjust the turret/impactor to PM (refer to “Turret” in Figure 4-6).

3. From the Start screen, press ▲/▼ Arrows until Calibration is selected and press Enter

4. In the Calibration screen, press ▲/▼ Arrows and select PM (for particulate matter).

 NOTE: If the impactor setting is incorrect, the instrument will flash a warning sign indicating

Figure 4-7: Selecting calibration screen

that you need to turn the impactor to “PM” before proceeding.

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History soft key

Calibration soft key

Verify soft key

Start soft key

Particulates Calibration (Zero Cal)

5. Press the Cal soft key. (The pump will turn on.)

 NOTE: The HISTR and VERIFY soft keys will not be present if a user calibration and a

calibration verify have not been performed.

Figure 4-8: Particulate cal screen

6. The ready screen with the PM, Profile will appear. Press the Start soft key.

Figure 4-9: Particulate calibration and ready screen

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Zero will appear

when it has stabilized

Current Level reading

Set soft key will appear when stabilized

Save soft key

Particulates Calibration (Zero Cal)

7. Allow the level to stabilize (approximately 1–3 minutes). It will state Waiting (A) and Set soft key

will appear when it has stabilized (B).

Figure 4-10: Particulate calibration and waiting screen

8. Press the Set soft key to set the Zero cal point.

9. The instrument will show a Pause state with the intended and actual values.

Figure 4-11: Particulate calibration pause screen

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Retry

Actual calibration value

Exit

Particulate Advanced Calibration (Gravimetric)

10. Press the Save soft key to save your calibration (or press Cancel and Retry to repeat this process.)

A screen pop-up will state “Zero cal set point” when completed (or “User canceled calibration”). A pass (cancel) screen will be displayed.

Figure 4-12: Zero Cal set for Particulates

 Press Retry soft key to repeat the zero cal procedures.

11. Press Exit soft key to close this screen. To return to the start screen, press On/Off/Esc or

press the Cal soft key to continue calibrating the sensors.

 NOTE: A zero cal is performed for the instrument and will be used for all profiles.

Particulate Advanced Calibration (Gravimetric)

With the EVM, you can store up to eight different profiles (also called correction factors) to reflect the environment or building zone you plan to measure.

The instrument is factory calibrated to Arizona Road dust. In some situations, you may want to perform a gravimetric calibration in order to determine the correction factor for an alternative environment. This is an optional procedure.

 NOTE: If you do not plan on performing an advanced particulate calibration with gravimetric

sampling.

With a gravimetric calibration, you determine the mass of the particulate you want to measure. The particulate mass is then used to calculate a correction factor to the environment you will be measuring. The steps below outline a gravimetric calibration.

(For additional specifications on a gravimetric calibration, please refer to the NIOSH 0600 standard.)

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Reset soft key

Reset Gravimetric fields to “0”

Gravimetric Calibration Overview

1. Reset the gravimetric and volume accumulators.

2. Insert a new (sealed) gravimetric cassette.

3. Measure in the specific location for approximately four to eight hours.

4. Proceeding the measurement, the gravimetric accumulator on the EVM will display

the amount of dust that has accumulated based on the active profile. (This value is used in conjunction with the weight of the measured dust in the cassette.)

5. To determine the weight of particulates in the gravimetric filter, remove the

gravimetric cassette and weigh the contents. (Typically, sent to a lab for results.) Do not include the weight of the cassette.

6. To determine the correction factor, calculate the ratio between the particulate mass

value and the weight from the gravimetric filter lab analysis.

 For example, let’s say that you measured for 8 hours in a wood shop and the

PM mass accumulator displays 10 mg. Next, you measured the dust in the gravimetric filter/cassette and determined the weight as 20 mg. To calculate the correction factor, you divided 20 mg by 10 mg and determined the value as 2.

Lastly, the correction factor of “2” is multiplied by the existing active profile

correction factor, and is entered as the new correction factor (Setup\PM\EDIT

Performing a Gravimetric Calibration

Ensure the gravimetric cassette is new before beginning.

1. Place the instrument in the appropriate environment.

2. Turn on by pressing On/Off/Esc .

3. In the Start screen, select the Setup menu and press Enter

pressing the Down arrow repeatedly and once selected, press Enter .

4. In the particulate screen, the reset gravimetric accumulator fields will display either a value of the

collected dust or it will display zero (if already reset). When beginning a gravimetric calibration, ensure this is set to zero.

Figure 4-13: Reset gravimetric setting

. Next, select Particulates by

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Air Flow Outlet

Used to connect a primary standard calibrator with tubing

Pump Flow Rate Calibration

 To reset, press the down arrow repeatedly to select the gravimetric fields and press the Reset

soft key. (If it is not displayed, press the Altf key.)

5. Turn the pump on by pressing the Pump

6. Optional step: a. It is optional to press the Run/Stop key to log the gravimetric filter sampling.

 NOTE: If in “run mode”, a clock appears and displays the overall run time.

b. To view the particulate level, press the right arrow once from the start screen and the

particulate measurement screen will appear (noted as “PM”).

7. After the gravimetric collection, turn the pump off and reference the Gravimetric Mass field to view

the calculated particulates.

8. Lastly, calculate the ratio between the value in the Gravimetric Mass field and the weight of the

collected sample.

9. Enter in the correction factor via the Particulate Setup screen (see “Setting Profiles” section for

more details).

Pump Flow Rate Calibration

An accurate flow meter, such as a primary standard flowmeter calibrator, and inert tubing is required to perform this calibration. The inert tubing is inserted on the dust air flow outlet (located on the back of the housing).

 NOTE: You may want to send the instrument in for a yearly calibration, if you do not own a

flowmeter calibrator for this calibration procedure.

key.

 Flow rate calibration

1. Connect the flow meter (i.e, primary standard) and inert tubing to the EVM.

2. Turn the EVM on by pressing On/Off/Esc .

3. Select the Calibration menu by pressing the Down Arrow until it is selected and press Enter

4. Select Flow Rt (flow rate) by repeatedly pressing ▲/▼ Arrows key until it appears.

Figure 4-14: Pump flow rate calibration

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1.67 L/min (lpm) is the recommended flow rate to mirror with

Percentage of air flowing through the pump

Save

Toxic Gas Sensors

5. Press the CAL soft key and then press the Start soft key.

Figure 4-15: Flow Rate Calibration

6. Manually adjust the flow rate (as needed) by repeatedly pressing the Up/Down key to select the

desired level.

7. Press the Save soft key to store this as your flow rate calibration. The flow rate summary will

appear.

 NOTE: You may want to repeat these steps if the desired level was not achieved. Press the

Cancel soft key to stop the calibration. Next, press the Retry soft key and repeat the

calibration steps to re-cal the flow rate.

8. Press the Exit soft key to exit this screen. (The pump will turn off.)

Toxic Gas Sensors

9. Press the On/Off/Esc

key to return to the start screen.

The gas sensor chamber will allow you to measure any one of the single toxic gases listed below. Refer to Appendix A for detailed specifications.

1. Carbon monoxide (CO) with a range of 0–1000 ppm

2. Chlorine (CL

) with a range of 0–20 ppm

3. Ethylene oxide (EtO) with a range of 0–20 ppm

4. Hydrogen cyanide (HCN) with a range of 0–50 ppm

5. Hydrogen sulfide (HS

6. Nitrogen dioxide (NO

) with a range of 0–500 ppm

) with a range of 0–50 ppm

7. Nitric oxide (NO) with a range of 0–100 ppm

8. Oxygen (0

9. Sulphur dioxide (SO

10. Ozone (O

) with a range of 0–30%

with a range of 0–50 ppm

) with a range of 0–1.0 ppm

The sensors are based on well-established electrochemical sensor technology. They are designed to be maintenance free and stable for long periods of use.

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Gas

Interfering Gas

H2S

SO2

NO2

CL2

HCN

C2H4

HCI

100

~ 7

<10

<20

<40

N/D

H2S

100

~10

~-20

N/D

NO2

-5

<-.5 0 100

N/D

NO 0 N/D

~ 5

100

<30

N/D

HCN

N/D

NH3 0 0

~ 60

~20

<10 0 ~-50

~-5

N/D

<10

N/D

*O3

-8

N/D

~60 0 ~120

N/D

~150

Cross Sensitivity

The following table illustrates the cross-sensitivity to a range of commonly encountered gases, expressed as a reading of the sensor when exposed to 100 ppm of the interfering gas at 20ºC.

*Continuous exposures at ppm level over more than 30 minute might blind the sensor.

How Sensors Operate

Power is automatically applied to the gas sensors when they are connected and the instrument is turned on. These are also referred to as “intelligent-sensors”. Additionally, the EVM will automatically identify the type of gas sensor that is installed.

 NOTE: It may take a few minutes for a newly inserted sensor to stabilize before using.

Table 4-1: Cross-sensitivity table of interfering gas

Quality Calibrations

The quality of the calibration process depends upon the accuracy of the calibration gas and allowing the sensors to stabilize before saving the zero and span calibrations.

About Sensors and Cal Storage

Once a calibration is completed and a sensor is removed, the calibration records are stored in the sensor.

Calibration History and Sensor Serial Numbers

After running, saving a calibration, and downloading the data to Detection Management Software (DMS), the calibration type, levels, the serial numbers, and the date/time of the calibration are viewable in the software. The serial number of the sensor is available in DMS in the calibration history chart.

Figure 4-16: Calibration history for EVM

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1. Connect the gas

source, regulator and inert tubing.

2. Slide the inert tubing

over the black nozzle of the cal cup.

3. Remove the air inlet

coverr on the EVM. (See Figure 4-2 for an example).

4. Place the Cal cup over

the air inlet.

5. When you are ready to

access the Cal screen, turn on the regulator.

EVM

Tubing

Regulator

Calibration gas source

Cal adapter

Important

The zero and span adjustment procedures for oxygen are different than other gas sensors.

Applying a Gas Sensor

Gather your calibration gas source, the regulator (if not already connected), inert tubing, the cal adapter and the EVM with the appropriate sensors installed. After your calibration setup is completed, follow the proceeding applicable calibration sensor sections.

 Applying a gas sensor

Figure 4-17: Applying a gas sensor

Calibrating Toxic Gas Sensors

It is recommended to conduct a zero cal and a span cal with toxic gas sensors. Essentially, a calibration is conducted by checking the sensors response to a known concentration of a certified calibration gas. It is important to note that with a zero cal and a span cal, you should be in a non-contaminated environment when performing the calibration.

It is recommended to calibrate on a regular basis for best results. You will want to perform a zero cal and a span cal (or adjustment) to properly calibrate a toxic sensor.

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Caution

Due to the presence of toxic gas during the calibration process, appropriate safety procedures should be followed.

Additionally, you will want to ensure that your calibration is performed in an area known not to contain hazardous or interfering gases if ambient air will be used as the zero gas for operation. If this is not possible, pure bottled air (Nitrogen is recommended) should be substituted. Instructions for both procedures are provided below. You only need to perform one or the other.

Selecting a sensor

Press Up or Down Arrow on keypad

Cal soft key

Calibrating Toxic Gas Sensors

Toxic Gas Zero Calibration

When conducting a zero cal for toxic gas, you will want to use a cylinder of Nitrogen or pure air with the cal cup placed over the air inlet cover. (See “Applying a gas sensor” for details).

 NOTE: If you are in clean air environment, you can use room air (for all toxics except for ozone).

Ozone Calibration for Zero and Span

For an Ozone calibration, a zero calibration is performed with Nitrogen and a span calibration is performed using an ozone generator.

 NOTE: It is recommended to factory calibrate the ozone sensor on a yearly basis.

 Performing a Zero cal for toxic gas

1. While the instrument is powered off, connect the pure air cylinder, regulator, inert tubing, and cal

cup to the EVM.

2. Power on the EVM by pressing the On/Off/Esc .

3. In the start screen, press the Down ▼ arrow to select Calibration and press the Enter

4. Press ▲/▼ Arrows to select the toxic you want to calibrate.

5. Press the Cal soft key and a specific toxic gas (i.e., CO) Calibrate Set Point screen will appear.

Figure 4-18: Selecting sensor for calibration process

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* Flashing asterisk indicates

cal. mode.

Level

Allow to stabilize before setting calibration point

Press Set soft key to save the level set point

Zero Cal

+ (plus sign) indicates Zero cal has been set.

Span cal

- (minus sign) indicates User Span cal has not been set.

Soft keys

Explanation

Cal

When pressed, this will allow a calibration to be performed.

Zero When pressed, this will enable you to a zero calibration.

Span

When pressed, this will enable you to perform a span calibration.

Exit

Enables you to exit at any time.

Calibrating Toxic Gas Sensors

6. Turn regulator On. Wait for the current level to stabilize (allow at least 90 seconds to stabilize.)

(The screen will show +Ready.)

7. When the level has stabilized, press Zero soft key.

Figure 4-19: Calibration zero screen

8. Press the Set soft key. A screen displaying the zero cal intended and actual set point values will

appear. Press the Save soft key.

Figure 4-20: Calibration zero pause screen

9. To set the span cal, proceed to “Toxic gas – span calibration”.

 NOTE: To re-do the zero calibration, press the +Zero soft key and repeat steps 7 and 8.

Table 4-2: Gas calibration soft keys explained

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Level

Allow to stabilize

Set

Calibrating Toxic Gas Sensors

Toxic Gas Span Calibration

When conducting a span calibration, the calibrated gas used should match the sensor you will be calibrating.

 NOTE: For Ozone span calibration, an ozone generator should be used.) If you are continuing from

the Toxic Zero cal section, the screen you will be viewing is the Calibrate/Pause screen. (If you are performing a Span cal only, ensure you are at the Start screen and select the calibrate menu. Then select the specific sensor by pressing up/down arrows. Press the Cal soft key and then press the Span soft key. Proceed to Step 2.

 Performing a span cal for Toxic gas

1. Continuing from the zero cal procedures, you should be viewing the Cal/Pause screen (as

displayed in Figure 4-17). Press the Span soft key.

2. Apply the gas at full flow rate while observing the “Level” field on the display. Wait for the current

level to stabilize (allow a couple of minutes).

Figure 4-21: Span Calibration

3. Adjust the span value by pressing ▲/▼ Arrows on the keypad.

4. Press the Set soft key to store the span cal. point. (A screen will appear displaying that you set the

span cal. point.)

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* New value

Previous calibration result

SAVE soft key

Calibrating CO2 AND O2

5. Once your calibration is set, intended and actual cal values will appear on the display screen.

Press Save to store these as your calibration set points.  NOTE: To redo the span calibration, press the Span soft key and repeat steps 2–5.

6. Turn the regulator off and disconnect the tubing from the instrument.

7. Repeatedly press On/Off/Esc until you return to the start screen.

8. Press ◄/► Arrows to view measurement screens.

Calibrating CO2 AND O2

With the Carbon Dioxide (CO2) or Oxygen (O2) calibration, you may perform a zero calibration and a span calibration (when the cal gas is connected) in the field. Each of these screens will be discussed below.

The CO2 sensor and O2 sensor requires a calibration gas, a regulator with at least 1 L/min flow rate and inert tubing.

A zero calibration using a Nitrogen (N2) gas is recommended. For a span calibration, the range (or span) should be a sizeable fraction of the selected full scale range of the gas.

Figure 4-22: Saved Calibration screen

O2 Accuracy

The range for O2 sensor is 0–30% with a typical span cal of 20.9%

 Calibrating a zero cal and span cal for CO

1. Connect one of the following gases with the regulator and inert tubing:  N

gas (used for zero cal.)

 CO  Room air for 0

2. Attach the regulator and tubing to the gas cylinder.

3. Place the Cal. cup over the Air inlet cover and slide the tubing over the black air inlet casing.

4. From the start screen, press ▼ Arrow to select Calibration and press Enter

calibration gas

calibration gas (i.e., 20.9%)

or for 02 sensor

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Selecting a sensor

Press Up or Down Arrow

CAL soft key

Soft key Menu

Zero, Span or Exit

Calibrating CO2 AND O2

5. In the Calibration screen, press ▲/▼ Arrows to select CO

Figure 4-23: Selecting a calibration sensor

6. Press the CAL soft key to open the CO

“Calibration/Calibrate” screen. (Allow at least 2.5 minutes

or O2.

for CO2 to stabilize.)

 For the Set Points, -zero and –span soft keys will appear. Press either Zero Cal or Span Cal

soft key. (See Table 4-2 for more information.)

Figure 4-24: Calibration CO2 ready screen

 NOTE: If “–” (a minus sign) appears in front of Zero or Span, this has not been calibrated.

Alternatively, the “+” (plus sign) signifies the cal point has been calibrated.

7. Turn the regulator on. The regulator should have a flow rate of 1.0 L/min.

8. Allow the level to stabilize. For CO

 For Zero Cal, the screen will display Zero with a Set soft key.  For span cal, press ▲/▼ Arrows on the keypad to adjust the appropriate level.

, wait at least two minutes to stabilize.

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Level

Allow to stabilize before setting calibration point

Set Soft key

Intended cal. values

❸ Cal before Zero cal ❹ Cal before Span cal

Actual cal. values

❶ After Zero Cal ❷ After Span Cal

Save

❶ ❷ ❸

❹

Calibrating CO2 AND O2

9. Press the Set soft key. Turn off regulator and unhook the N

bottle (for zero cal) or CO2 bottle (for

span cal). (To perform a Zero or Span cal, repeat steps 1–8.)  NOTE: To redo a zero or span calibration, press the zero or span soft key and repeat steps

above to program new set points.

Figure 4-25: Setting CO2 Span Cal screen

10. Once the zero and span cal values are set, the calibration save screen will appear. Press Save to save your calibration.

 NOTE: To repeat the cal, press the Cancel soft key and you will return to the calibration

screen. Repeat the steps above to program new set points.

Figure 4-26: Saved Calibration

11. Once saved, the display will indicate if it passed. You have another option to Retry the calibration procedure by pressing the Retry soft key.

12. To exit CO

calibration, press the Exit soft key.

13. Then, press On/Off/Esc twice to return to the Start screen.

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Selecting PID sensor

Cal soft key

Calibrating Photo-Ionization Detector (PID) Sensor

PID parts per million (ppm) zero calibration

It is preferred to flush the PID ppm sensor with Zero Grade Air for a zero calibration. Alternatively, you may flush the PID ppm sensor with Nitrogen. In clean environments (with no presence of toxic chemicals, such as in a school setting with no toxic cleaners present) applying room air can be used to set your zero calibration point.

For the flow rate, it is recommended to set it at 1 L/min for best response time.

PID parts per billion (ppb) zero calibration

 NOTE for PID ppb sensor: The PID ppb sensor may be susceptible to baseline settlement after

more than 2 weeks of storage. In these cases, the PID PPB sensor should be operated in clean air for several hours prior to performing a calibration and prior to performing measurements of low concentration of gases (< 1000 PPB).

The PID ppb sensor uses a static base line for the zero offset. If the user adjusts zero base line, the PID ppb needs to be enabled in the setup menu.

 NOTE: To enable, select Setup from the main screen and then choose PID. In the PID screen,

enable the ppb zero feature. Once set, return to the calibration screen to resume the calibration process. (For more details on setting, refer to “PID sensor setup” in Chapter 3.)

 PID ppm/ppb zero cal

1. Connect the Zero Grade Air and cal cup to the EVM. (Skip this step if you are not applying a gas.)

2. From the start screen, press the Down ▼ arrow to select Calibration and press Enter

3. Press the ▲/▼ Arrows to select the PID sensor.

Figure 4-27: Selecting PID sensor for calibration process

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Zero

With PID ppb sensor, if

“Zero” is not displayed,

this indicates the PID setup PPB sensor should be set. See PID ppb zero cal. section above.

Units: ppm/ppb

The EVM will automatically display the attached sensor which is either PID ppm or PID ppb for VOC testing.

Flashing asterisk indicates cal. mode.

Level

Allow to stabilize before setting calibration point

Set soft key

Calibrating Photo-Ionization Detector (PID) Sensor

4. Press the Cal soft key and the Calibrate PID/Ready screen will appear. Press Zero soft key.

 NOTE: Allow at least 60 seconds to stabilize.

5. When the level has stabilized, press the Set soft key. (Or press Cancel soft key and then Retry

soft key to repeat this process.)

Figure 4-28: Calibration mode screen

6. The PID/Pause screen will appear displaying the intended and actual calibration values. Press the

Save soft key. (Or press the Cancel soft key to repeat this process.)

 To set the span cal, proceed to “PID – span calibration”.

7. To restore the factory calibration for the ppb sensor, select the HISTR soft key from the PID

calibration screen. Press the FACTRY soft key. This restores the ppb zero calibration value.

PID Span Calibration

Typically for PID 100 ppm, isobutylene is used for a span calibration when the VOCs are unknown or apply the gas of interest if detecting a specific VOC for best results.

To measure a specific VOC with PID PPM sensor, you will want to use the relevant VOC for your calibrated gas source. However, for PID PPB span calibration, it is recommended to use 10 ppm (or 10,000 ppb) isobutylene whether the gas of interest is known/unknown.

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Intended and Actual

Zero cal set point results

Span

Calibrating Photo-Ionization Detector (PID) Sensor

 NOTE: A correction factor is a number that relates to the PID sensor of a specific VOC and

correlates to the PID response to the calibration gas (sometimes referred to as a response factor). Please reference Appendix C for specific correction factors provided by Ion Science.

Performing a PID Span Calibration

Allow up to 15 minutes of warm-up time for PPB PID sensor and 5 minutes for PPM PID sensor. For PPB span calibration, refer to PID ppb note if the sensor has not been used for over two weeks.

If you are proceeding from the Zero cal section, the screen you will be viewing is the Calibrate/Pause screen. (If you closed the screens, refer to the Note in step 1.)

 PID Span Cal

1. From the PID/Calibrate Pause screen, press the Span soft key on the keypad.

 NOTE: To navigate to the PID Span cal screen, select the Calibration screen. Select PID

using the up/down arrows. Then, press the Cal soft key. Zero and Span soft keys will appear. It will look similar to the screen below but it will not have the intended/actual zero cal set points displayed. See step 2 to proceed.

Figure 4-29: PID Calibration Span soft key

2. Adjust the span value by pressing ▲/▼ Arrows once the sensor has warmed-up.

3. Apply the gas at full flow rate while observing the “Level” field on the display. Wait for the current

level to stabilize (allow a couple of minutes).

4. Press the Set soft key (and it will state Cal set point stored).

5. Once your calibration is completed, a Save screen will appear with the details of your parameters.

 NOTE: If you want to repeat the span cal, press cancel and a message will appear stating it is

canceling. Press the Retry soft key to repeat the span cal steps.

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Calibration results after completed span cal.

Previous calibration

SAVE soft key

Calibrating Relative Humidity and Temperature

6. Press Save soft key to store this into the memory.

Figure 4-30: Saved Calibration screen

7. Turn the regulator off and disconnect the tubing from the instrument.

8. Repeatedly press On/Off/Esc until you return to the start screen. (Press right or left to view

measurement screens.)

Calibrating Relative Humidity and Temperature

The relative humidity and temperature sensors are factory calibrated. To perform a calibration, you would place the instrument into the location you will be testing with the appropriate temperature sensing instrument (such as a thermometer for a temperature calibration). Then, access the calibration screen and allow the Relative Humidity and Temperature readings to stabilize. Preceding the calibration level, you then store these values.

 NOTE: When performing a user calibration on Relative Humidity and Temperature, do not

externally power/charge the instrument. If you are currently charging or using an external power adapter, disconnect before proceeding.

 Relative Humidity or Temperature calibration

1. Open the Calibration screen.

2. Press ▲/▼ Arrows and select either RH or Temperature calibration.

3. Select the Cal soft key and then press the Start soft key.

4. Adjust the level to match the current value of a calibrated temperature sensing instrument.  To adjust the level, press ▲/▼ Arrows until the appropriate value is selected.

5. Press the Set soft key and a Save screen will appear.

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Temperature cal

 Intended & actual readings

Saved Cal Before Set point

Saved Cal

After Set point

Calibration History

6. Press the Save soft key to save the calibration.

7. To calibrate the other sensor (RH or Temp), repeat these steps.

 Or press the Exit soft key and then press On/Off/Esc .  To open the calibration screen: from the start screen, press the Down ▼ arrow to select

Calibration and press Enter . The Calibration screen will appear.

8. To exit and return to the main screen either press the On/Off/Esc twice.

Calibration History

The calibration history screen will show your previous calibration of a specific sensor. When the sensor is selected, the last calibration performed will be shown. To view the calibrated values, an optional History menu is selectable via a History soft key. The figure below is an example of a CO2 cal. history.

Figure 4-31: Temperature calibration

Figure 4-32: Calibration History screen

 Accessing the Calibration history screen

1. Select the Calibrate menu from the start screen and then choose a sensor.

 NOTE: Press up/down arrow in the calibrate menu to select a sensor.

2. If the sensor selected was recently field calibrated, the History softtkey menu will appear along

with the date and time of the last calibration.

3. Press the HISTR soft key to view the saved calibration results.

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Calibrate offset value

Verify Calibration and Drifting Analysis

4. To exit and return to the start screen press On/Off/Esc twice.

Verify Calibration and Drifting Analysis

The verify screen is typically used to analyze drifting. This process verifies if the zero calibration remained stable or unchanged during the run-time/logging time. If it did not remain stable, you can set a new calibration offset and save this as your new set point.

 Verify calibration

1. Select the Calibration menu from the start screen and select a sensor you want to verify.

 NOTE: Press up/down arrow menu to select a sensor in the calibration menu.

2. Press the Verify soft key. (The Calibrate offset will display on the screen.)

 NOTE: For this example, PID sensor was selected in step 1. If you selected a different sensor,

the screens will look very similar to the figures below.

Figure 4-33: Calibrate offset verify screen for PID sensor

3. Press the Start soft key and allow the level to stabilize. (Apply any gas if applicable as described in

the Calibration sections above.)

4. Press the Set soft key to set a new calibration value.

Figure 4-34: Calibrating PID

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Verify Calibration and Drifting Analysis

5. The Intended and Actual values will appear. Press the Save soft key to save these new values.  Or press the Cancel soft key and press Retry to repeat this process.

6. To return to the start screen, press On/Off/Esc twice.  To retry the offset cal, press the Retry soft key and repeat the steps above.

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Verify Calibration and Drifting Analysis

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Measuring and Viewing

Quick Help List: typical gas/particulate/air quality overview

1. Turn the EVM on and check your battery power (see Chapter 2).

2. Reset/Clear memory (if necessary). o This will clear out all of the data history before your study begins to ensure you have sufficient

memory space.

3. Set-up your study parameters (see Chapter 3).

4. Calibrate each sensor/parameter (see Chapter 4).

5. Place the EVM in a specific location for area monitoring.

6. Press the Run/Stop key to start the study (see Chapter 5)

7. When you are ready to end your study, press the Run/Stop key to stop the study.

8. Review your results either on the instrument or download to DMS for further analysis (graphs/charts,

saving and printing).

CHAPTER

Overview of Running a Session

Measuring and Viewing

Once you have setup your logging parameters and calibrated the instrument, you are ready to begin measuring. The focus of this chapter is to give you a brief overview of what is measured, how to navigate, what measurements screens will appear, and how to run and stop your measurements. The chapter concludes with an explanation of the file system management functionality which is comprised of the following: reviewing past measurements, deleting files, viewing file storage and memory, and viewing the estimated run-time.

 NOTE: The subsequent sections show examples of views which you may have disabled on your

instrument (refer to Chapter 3, “Setting-up the EVM” for more details).

Overview of Running a Session

The list below is a brief overview of the steps for running a study.

Quick Help

Figure 5-1: Quick help list for running a study

Measuring

Once you have placed the Environmental Monitor (EVM) in a specific location, you are ready to take measurements.

With a couple pushes on the keypad buttons, you will be running and viewing your sessions. Following your sessions you can load the data/files into DMS to manipulate, analyze, save, and create reports (See Chapter 6 for viewing your logged data in DMS).

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Measuring

Understanding What Data is Stored

When you are performing air quality monitoring, there are two types of data stored in the instrument which includes summary data and time history data (or logged data).

Summary Data

Summary data represents values that occurred over the entire run of the study. An average measurement is the average of all arithmetic data points for a sensor (i.e., dust, humidity, CO, etc..), Max and Min values are the highest and lowest measurements that occurred throughout the run time.

Figure 5-2: Sample summary data from a DMS table

Logged Data/Time History

Logged data, also referred to as “time history,” plots measurements with a specified logging interval ranging from 1 second intervals to 60 minute intervals (as set up in the EVM monitors via the logging screen).

Time History data represents measurements that occurred over the most recent time period, which is the logging interval. For example, if the log interval is 1 minute, then the maximum value is the highest value for that 1 minute, and the Lavg value is the average value for that 1 minute.

 NOTE: DMS has two default logged data charts that appear: temperature and humidity on the first

logged chart, and Dust and CO2 data on the second logged data chart. (If you do not have those sensors installed, they will not appear.) In DMS, to view different sensor

measurement parameters on the logged data chart, click on the and click in the specific sensors’ checkboxes.

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Measuring

Particulates

Will display max. and low peaks in logged data chart.

CO2 data

Run mode

Level values for each sensor

 Shortcut: Press Enter

key to toggle through different measurement units.

Running and Stopping

Figure 5-3: Sample time history data (or logged data) chart

Running and Stopping

When running a session, the pump will automatically turn on during your logging/run if particulate is enabled. (This is explained in the Particulate setup section.) At any time, you can turn the pump off (disable) if you are not measuring particulates or the environment is extremely dirty and you want to keep the pump clean. Simply press the particulate key (as indicated in Figure 2-2) to turn this feature off. To page through the measurement screens, press ◄/► Arrows.

 NOTE: For particulates ensure the impactor is well-greased before measuring (see “Impactor Care”

for details).

 Running and Stopping measurements

1. From the start screen or any of the measurement screens, press the Run/Stop

key to begin

measuring.

 A 5 second countdown will appear with a run message (in pause mode) when the particulate

setting is enabled.

2. Press and hold the Run/Stop

Figure 5-4: Composite measurement screen in run mode

key to stop measuring.

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Measurement Screens and Navigation

Abbreviations on the EVM

Explanation

Over Load – This indicates a measurement (on the current screen) is above the maximum value (for that sensor) which the instrument can measure.

Under Range – A measurement (on the current screen) is below the minimum value (for that sensor) which the instrument can measure.

ºF

Degrees Fahrenheit – This is displayed with readings for Temperature and Dew Point.

ºC

Degrees Celsius – This is displayed with readings for Temperature and Dew Point.

Percent- This is displayed for the percentage measurement for the pump flow rate, the relative humidity sensor, and the Oxygen sensor.

ppm

Parts per Million – This is displayed with measurement readings of CO2 , toxic gas, and PID sensor(for VOCs).

ppb

Parts per Billion – This is displayed with reading of PID sensor (for VOCs).

mg/m3

Milligrams per cubic meter – This is a unit of measurement (of mass per unit volume) and is used for particulate measurements and PID PPM (PID sensor for VOCs).

μg/m3

Micrograms per cubic meter – This is a unit of measurement (of mass per unit volume) and is used for particulate measurements and PID PPB (PID sensor for VOCs).

Volume – Gravimetric volume for the particulate measurements.

Mass in Milligrams – Gravimetric accumulator mass for the collected particulates.

m/s

Meters per second – This is the unit of measurement for metric air velocity.

ft/m

Feet per minute – This is the unit of measurement for air velocity.

Unit defined

Measurement Screens and Navigation

To navigate through the measurement screens repeatedly press ◄/► Arrows key from the Start screen. (The start screen is the second screen you encounter after the initial splash screen.

Looking at the measurement screens clockwise (or pressing ► Arrow key), you will see the particulate measurement screen. The subsequent screens that appear include the relative humidity and temperature screen, the gas screen, the composite screen, and the air velocity screen. Depending upon the sensors you purchased, the installed sensors, and the measurement setup you may see some variations in the upcoming measurement screens in comparison to your instrument. These will be noted (or explained in full detail).

Unit defined

While viewing your measurement data, you will want to have a good understanding of the abbreviated units used on the instrument. These are listed in Table 5-1.

Table 5-1: Unit abbreviations

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Measurement Screens and Navigation

Soft key menus

Used to select additional menus or different measurements/units

Measurement Soft keys

Explanation

Lookup soft key (eyeglasses)

Lookup icon (eyeglasses) soft key – used to select and view different measurement values (on the particulate and air velocity screens).

Level, Maximum, Minimum, Average, Short Term Exposure Level (STEL) and Time Weighted Average (TWA).

Select soft key

Select soft key - if more than one sensor/parameter is selectable on a measurement screen, this is used to select a sensor such as: temperature, toxic gas sensor, PID sensor etc. If you are on the composite screen and the screen is magnified, you can select each sensor and the measurement units will be displayed on the bottom of the screen.

+/–

Magnifying glass symbol – Used to Zoom in (+) or out (–). (The plus denotes zoomed in and the minus sign denotes zoomed out.)

Detail soft key

Detail soft key – used to view a sensor’s measurement values in a summary screen. For

example, if you are on the composite measurement screen and you want to view the summary data for CO2, you would first select the CO2 field and then select the Detail soft key. You may need to press the up/down arrow to scroll through the data.

Trend soft key

Trend soft key – is graphical chart and is used to give you a quick synopsis of trends over time such as a high volume of particulates at a specific time. The following settings are always logged and are viewable by pressing the Altf key when you are viewing the trend screen: 90 sec, 180 sec, 900 sec, 90 min, 3 hrs, 8 hrs, 12 hrs, 24 hrs. The timescale (x-axis) can be expanded by pressing the right or left arrow keys. The measurement level (y-axis) can be expanded and contracted (some sensors) by pressing the up or down arrow keys.

About the Measurement Soft Keys

Each measurement screen has soft keys (extended menus) which are used to view different measurements.

 NOTE: Press the Enter key to toggle through the various measurements.)

Figure 5-5: Example of measurement soft key menus

Table 5-2: Measurement soft keys explained

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Particulate Measurement Screen

Measurement displayed is changeable via the lookup/glasses icon or by pressing Enter key

Impactor and profile displayed

Particulate Level is

0.445 mg/m3

Press Detail soft key to view all measurement values

Impactors and Particulate Measuring

Particulate Measurement Screen

The particulate measurement screen displays the user-adjustable impactor setting (i.e., PM 2.5), the applied profile (or correction factor) and various measurements (level, max, min, etc.)

Figure 5-6: Particulate Measurement screen

Impactors and Particulate Measuring

As discussed in the calibration chapter, there are four selectable particulate settings. To move the impactor, ensure you are in stop mode. Then, twist to the right or left until you feel a tactile detent. The impactor setting will align to the gray marking on the housing (see Figure 4-4 for an example).

 NOTE: The particulate screen will display “ERR” if it is not clicked into one of the appropriate

settings. The selections include: PM2.5, PM4, PM10, and PM.

 NOTE: The impactors may require cleaning during or after your measurement study. Please see

Chapter 4, “Impactor and Use” for more information.

Extending Run-Time for PM Measurements

If you will be measuring in a dusty environment (such as an environment that is oily) or for a long period of time (10+ hours), you may need to clean the impactors frequently in order to remove the debris buildup on the impactor. (See Chapter 7 for Maintenance and cleaning for more detailed instructions.)

To extend the run-time for PM measurements, attach a cyclone to the turret. The cyclone is used to prevent the larger dust particles from building-up on the impactor which eventually clogs the impactor. It forces the larger particulates, using centrifugal force, down and around the filter and collects in the bottom holding cap. (See Figure 4-6 for more details.)

 NOTE: You use a cyclone that is designed to work at 1.67 L/min pump flow rate.

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Particulate Measurement Screen

Look-up/

Glasses icon.

Press Up/Down Arrow to select a measurement value.

Trend soft key.

Detail soft key.

LEVEL MIN MAX

STEL TWA

AVG

Changing Particulate Measurements

To change the displayed measurements, there are three options in the particulate screen. You can press the Enter key to page through each measurement, select a specific measurement from the

lookup/glasses soft key, and/or press the Detail soft key. (The measurements are defined in Table 5-3).

 NOTE: If “---” characters appear on the screen, this denotes that the measurement is invalid.

 To change your measurement view

1. Click on the “Look-up” icon .

2. In the pop-up measurement menu press the Up/Down arrow to select a different type.

3. Press Enter

4. To view a graphical view of the data, press the Trend soft key. In the Trend screen, press the Line

soft key. This switches the screen from a dotted line to a shaded bar chart view. To exit this screen, press On/Off/Esc .  NOTE: Press the Altf key to toggle between the trend time scale and the soft keys.

to select. On the particulate screen, the selected measurement type will appear.

Figure 5-7: Selecting a measurement calculation

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Relative Humidity and Temperature Measurements

Measurement values

Explanation

LEVEL

Level - Notation used to represent current live reading of the sensor. (This is updated once a second.)

MIN

Minimum - Minimum level value which occurred during a log session.

MAX

Maximum - Maximum level value which occurred during a log session.

AVG

Average - Arithmetic average of all level values which occurred during a log session.

STEL

Short term exposure level - is a calculation used to indicate an exposure level (to a toxin) over a short-term period. This value is calculated by averaging the last 15 one minute averages. This value is invalid for the first 15 minutes and is updated every minute thereafter. Essentially, it is used when the building occupant/worker is exposed to high concentrations of chemical gases. The measurement will average after 15 minutes of data logging and continue to compute after each minute of logging, using measurements from the most recent fifteen minutes. If less than 15 minutes has elapsed, the STEL will be invalid by displaying dashes.

TWA

Time weighted average - is an average based on an 8-hour interval. The summing all of the level values taken and dividing by the number of samples in 8 hours (at one sample per second the total would be 28,800). The important thing here is that the average is calculated the same way regardless of whether you've run the instrument for 1 hour, 8 hours, 24 hours or any other amount of time (i.e. the number of samples used to divide by is the same). This value is updated once a second.

To select a different measurement type, press the Enter key repeatedly.

Select, Trend, Detail soft keys (used to change the measurement view).

Relative Humidity and Temperature Screen

5. Or select the Detail soft key and a summary of all the measurements will appear. (Below is an

explanation of measurements.)

Table 5-3: Measurement values explained

Relative Humidity and Temperature Measurements

The relative humidity and temperature sensor will display on the left-hand side of the screen with two measurement values. The measurement displayed in the second column is user-selectable via

Enter .

Relative Humidity and Temperature Screen

Figure 5-8: RH and temperature measurement screen

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Gas Measurements

Gas Screen

 To change the RH and Temperature measurement view

1. Press the Select soft key, Trend soft key, or the Detail soft key. (See Table 5-1 for details).

 NOTE: The ▲/▼ Arrows can be used instead of the Select soft key.

Gas Measurements

The gas measurement screen displays the measurements for CO2, toxic gas(es), and PID sensor.  NOTE: Depending on what sensors you ordered and which sensors are installed, the appropriate

gas sensors will display on this screen.

Gas Screen

Figure 5-9: Gas measurement screen

 To change the gas measurements view

1. Press the Select soft key, Trend soft key, or the Detail soft key. (See “Viewing summary/details”

or “Viewing trend details.)

 NOTE: The ▲/▼ Arrows can be used instead of the Select soft key.

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Composite Measurement

+ Zoomed in: The composite measurement screen (when zoomed- in) combines all sensors/parameters into one screen with two columns displaying two different measurement calculations. The second column is changeable by pressing Enter .

(See “B” below.)

– Zoomed out: The composite measurement screen (when zoomed-out), appears with

the measurements for all installed sensors. Press Enter

to change the

measurement values (as explained in Table 5-3). Press ▲/▼ Arrows or Enter

page through sensors. (See “A” below.)

A- Zoomed -out (Magnify soft key)

B – Zoomed-in (Magnify soft key)

Composite Screens

Composite Measurement

When you first access the composite screen, all of the sensors appear on the screen. There are two main views which is dependent on if you pressed the zoomed-in or zoomed-out soft key. (The “zoomedout” is the default composite view.)

Composite Screens

Figure 5-10: Composite measurement screen

 To change the composite measurements/view

1. Press the Select soft key, Trend soft key, or the Detail soft key (see “Viewing summary/details” or

“Viewing trend data” for more details).

2. To zoom in on the results, press the Magnify soft key (see “B”).

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Air Velocity Meaursurement Screen

Air Probe bracket attachment

Output

*Pull back rubber covering in order to plug in cable.

Air velocity measurement screen

Connect Air Probe to the back housing (two inlets located near the air flow outlet. See air flow diagram on previous page. )

Composite Screens

Air Velocity Meaursurement Screen

There are a couple quick steps to ensure air velocity is setup and that the Air Probe is attached before measuring.

1. The air velocity setting is enabled in Setup /AUX/Air Velocity screen (see “Air Velocity” Setup in

Chapter 3 for more details).

2. Connect the Air Probe bracket attachment to the backside of the EVM. Attach the Air Probe to the

bracket. Next, plug in Air Probe plug from the Air Probe to the digital output on the instrument. (See Air Probe output below.)

 NOTE: It is optional to attach the Air Probe to the bracket on the instrument.

3. Turn Air Probe switch to On.

4. Navigate to the Air Velocity measurement screen using the ◄/► Arrows.

5. To log air velocity data, press the Run/Stop key.

Figure 5-11: Attaching Air Probe and measuring Air velocity

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Summary Data

PM (Composite) details screen

Exit soft key

Viewing Details in the Measurement Screen

Summary Data

In each of the measurement screens, a Detail soft key will appear. Once selected, you can view a quick summary of all measurement calculations in one screen. This is explained below.

Viewing Details in the Measurement Screen

 Viewing the composite measurements in individual summary screens

1. To view details of a sensor, select a measurement screen and then select/highlight a specific

sensor (if more than one is displayed).

 For example, to select PM from the Composite screen, press ▲/▼ Arrows or the Select

soft key.

2. Press the Detail soft key and a summary screen of the selected measurement screen (i.e., PM 2.5

– particulates screen) will appear.

Figure 5-12: Details of the composite measurement screen

3. Press On/Off/Esc to return to the previous screen.

 Repeat these steps to view other sensor measurements.

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Trend Data

Trend soft key

Press third soft key to view trend data

Viewing trend data in the measurement screen

Trend Data

The trend data screen is a graphical logged data chart and is viewable in all the measurement screens. Depending on the parameter you are viewing (i.e., PID sensor, Particulates, etc...), it will display the measurement level values in a graphical format.

Viewing trend data in the measurement screen

The example in Figure 5-13 displays particulate trend data with one second level values.

 Trend data screen

1. To select a trend screen, first select a measurement screen you want to view.

Figure 5-13: Selecting Trend soft key

2. In the measurement screen, press the Trend soft key and a graphical data chart will appear.

 You can either view the data as a “Line” format or a “Bar” chart format by pressing these soft

keys on the bottom of the display.

3. (Optional) Press the Altf key to toggle between the trend time scale units and the soft key menu.

4. (Optional) Press ▲/▼ Arrows to change the vertical range.

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Past Session

Scale

Press up/down to change range

Trend Screen (Dust example)

Plots data logged points over 90 second intervals

Line (or Bar) soft keys

View trend data as a bar chart or as a line chart by pressing this soft key.

FILES Allows user to choose any past session. (This appears when File field is selcted.)

DETAIL

Used to view the summary data of the selected session.

Summary Data Screen

5. (Optional) Press ◄/► Arrows to change the horizontal range.

6. Press On/Off/Esc to return to previous screen.

Past Session

The past session summary screen allows you to view your session summary data. You can view sessions by name and file size, name and date, or name and run time via the lookup soft key. Once a session is selected, the measurement summary information is viewable and selectable via ◄/► Arrows.

 NOTE: The session run time will appear at the top of display.

Figure 5-14: Trend Screen for PM (Dust)

Summary Data Screen

 Selecting and viewing past session summary data

1. From the Start screen, select past session summary menu and press Enter

2. In the past session screen, to view the last session, ensure this field is selected then press Detail

soft key.

Figure 5-15: Past session screen

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Past Session

Look-up Re-arrange how the sessions are organized.

Past sessions listed by Name and date order

Files soft keys

Explanation

Lookup

Look-up soft key: used to organize the session files by the following: Name & file size, Name &date, or Name& run time

PG-UP

Displays the previous page of session files.

PG-DN

Displays the next page of session files.

LOAD

Once you select a session file to view, press the Load soft key in order to LOAD and then view the detailed summary data screens.

Summary Data Screen

3. To select a specific file, first select the File field and then press the Files soft key and the

Load File screen will appear.

 Optional: press the Look-up soft key to view the file by name and file size, name and date, or

name and run time. To select, press up/down arrow and then press the Load soft key to select.

 NOTE: Pressing the Enter key will sequence the files size, date, and run time.

 To select a session, press ▲/▼ Arrows and press the Load soft key.

Figure 5-16: Past Session with Files selected

Table 5-4: Past session files soft keys explained

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File System Menu

Session run time

Summary data

Measurements viewable for particulates

PM4

Indicates the summary data you are viewing.

Deleting Sessions Individually

4. Once a file is selected and loaded, press the Detail soft key to view the summary data.

 NOTE: The particulates, toxic gas, CO2 gas, and PID sensors will detail the following

measurement parameters: Min, Max, Avg, Max STEL, TWA. For RH, Temp, and Air Velocity, the measurement parameters include: Max, Min, and Avg.

Figure 5-17: Summary screen of a past session

5. When viewing summary data, press ◄/► Arrows to view summary data for each sensor. (This is

similar to viewing measurements during run or stop mode.)

 In the summary data screen, the session run time will appear in the upper hand corner of the

display.

 NOTE: For particulates summary data, it will display the impactor setting applied during the

measurement (i.e., PM4).

File System Menu

Deleting Sessions Individually

6. To return to the main screen, press On/Off/Esc twice to return to the Start screen.

With the File system menu, you can delete or clear sessions one-by-one or delete all sessions. You can also verify the used and free memory of the instrument via the Properties menu. The instructions below explain the Session Directory menu, Delete All Session menu, and the File System Proprieties menu.

 Deleting sessions individually

1. Open the File System screen from the Start menu and select the Session Directory menu. Then,

press Enter to open.

2. In the File System/Sessions screen, you have the same soft key selections as the Past Session

Summary menu. (See Table 5-4 for soft key explanation.)

3. To delete a selected session, first select a specific session to delete by pressing the

▲/▼ Arrows.

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File System Menu

Delete message

Press left/right arrow to

select “Yes” or “No”. Then

press Enter key.

Delete all sessions message

Press left/right arrow to

select “Yes” or “No”.

Then press Enter key.

Delete All Sessions

4. Press the Delete soft key. A Delete pop-up screen will appear. To confirm the delete, press the

Left arrow and then press the Enter . (This will delete the selected session.)

5. Repeat these steps until all of the appropriate sessions are deleted (or see the next section,

“Delete All” to delete all of the sessions.)

Delete All Sessions

Once you have reviewed your data and possibly downloaded to DMS for future storage, you can delete all sessions.

 Deleting all sessions

1. Open the File System screen from the Start menu and select the Delete All Sessions menu.

Then, press Enter

2. A delete message will appear. Press the left arrow to select Yes and press Enter

all sessions.

Figure 5-18: Delete session message

to open.

to delete

Figure 5-19: Delete all sessions message

3. A message stating “deleted all sessions will appear”.

4. To return to the start screen, press On/Off/Esc .

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File System Menu

File system properties

Summarizes the memory remaining on the instrument.

Memory Remaining and File Properties

The properties screen displays the number of stored files, the total amount of space used on the instrument, and the amount of free memory space.

 Viewing remaining memory and file properties

1. Open the File System screen from the Start menu and select the Properties menu by pressing

the Down arrow key.

2. Then, press Enter

 Num Files field – indicates the number of files saved on the instrument.  Used field – indicates the amount of memory used in the instrument’s file storage.  Free field – indicates the amount of memory available (or free) on the instrument.

key to open the Properties screen.

Figure 5-20: File Systems properties screen

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File System Menu

Estimated Run Time

The Estimated Run Time screen displays the amount of days, hours, and minutes’ remaining on the instrument. You can extend the run time if you log less parameters (such as, only logging MAX or increasing the log interval.)

You may want to download and save your files in DMS and then clear the memory on the EVM. This will also extend the logged time. For more information on estimated run time charts, see Appendix A, “Estimated logged run times.”

 NOTE: The estimated run time screen is also viewable via the logging setup screen (for more

details, see Chapter 3, “setting logging and viewing runtime”).

 View estimated run time

1. Open the File System screen from the Start menu and select the Estimated Run Time menu by

repeatedly pressing the Down arrow key.

2. Then, press Enter

key and the Estimated Run Time screen will appear.

Figure 5-21: Viewing estimated run time

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File System Menu

Estimated Run Time

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EVM Series User Manual

TSI Instruments EVM SERIES User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Dangers, Warnings, & Cautions

Table of Contents

List of Figures

List of Tables

Particulate Sampling (Aerosols/Dust Vapors)

Particulate Path

Particulate Sizes

Gas Sensors Sampling

Particulates and Cut-Point

Collecting/Sensing the Particulates

Gravimetric Sampling

Pump

Gas Sensors and Path

Volatile Organic Compounds (VOCs) Sampling

Temperature, Relative Humidity, Dew Point

What the Standards Say

Resources

EVM Series

Applications

Models Explained

Checking the Equipment

Display and Keypad

Diagram

Keypad description

Turning on

Start Screen Explanation

Navigating

Indicators/Icons on the display

Turning Off

Instrument Information

Unit Information Screen

TSI Detection Management Software DMS

Powering and Outputs on the EVM

Communicating

Battery

Charging

Outputs

Setting up Parameters via the Keypad

Time and Date Setting

Checking Battery Power

Display: Language, Contrast, and Key Click

Setting Logging and Viewing Run Time

PID Sensor Setup

Changing Units (Temperature, Particulates, PID, and Air Velocity)

Setting up Particulate Settings

Setting Profiles (Particulate Correction Factors)

How Particulate Factors are Adjusted and Calculated

Dust Correction Factors (Profiles)

Particulate Pump: Enable or Disable

Resetting the Gravimetric Filter

Auxiliary Input/Output

Digital Output

Air Velocity

Analog-out

Restoring Default Factory Settings

Backlight Setting

Resetting the EVM

Lock/Secure Run and/or Setup

Unlock run and/or setup

Auto-run

Auto-run and timed-run mode

Auto-Run with Date Mode

Auto-Run with Day of Week (DOW) Mode

Placement and Calibration of Sensors

Calibrating sensors include:

Inserting and Removing Sensors

Calibrating Particulates

Impactor and use

Adjusting the Impactor/Turret Setting

Particulates Calibration (Zero Cal)

Particulate Advanced Calibration (Gravimetric)

Gravimetric Calibration Overview

Performing a Gravimetric Calibration

Pump Flow Rate Calibration

Toxic Gas Sensors

Cross Sensitivity