Quest Engineering EVM Quick Start Manual

QUICK START

GUIDE

EVM Series Environmental Monitor

EVM and User Interface

Indicators

Display

Backlight

Particulate Pump

Left Arrow Key

Run/Stop Key

Softkey Menus

Up Arrow Key

Altf

Key

Enter Key

Right Arrow Key

Down Arrow Key

On/O and Esc Key

Turning On/O and Navigating

1. Press key power on. (Following a splash/welcome screen, the Start screen will appear.)

2. Navigating to measurement screens - press keys.
+ Navigating to menu options - press keys.
+ To open a selected menu or to save settings - press key.

3. In the powered on mode, press and hold key to power down the instrument.

Start Screen and Measurement Views

You will visit the start screen frequently to access measurements, setup, calibration, unit info,
and le system screens.

+ Press keys to access the measurements screens.
+ To select a menu option, press keys.

2

Overview of running measurements

Quick Help List: typical gas, particulates, or air quality measuring overview

1. Turn the EVM on and check the battery power.

2. Reset/Clear memory, if necessary (Start\File System menu). This will clear out data history

before your logging begins to ensure you have sucient memory space.

3. Set-up your session parameters either in Quest Detection Management Software (DMS)

or via the instrument’s Setup screen.

4. Verify the time and date is set correctly (Setup\Time-Date menu).

5. Calibrate each sensor/parameter via the Calibration screen.

6. Place the EVM in a specic location for area monitoring.

7. Press the key to Start logging.

8. When you are ready to end your logging, press key.

9. Review your results either on the instrument (via the File System screen) or download to DMS for

further analysis (graphs/charts, saving and printing).

Particulate Measurements

Particulate setup

1. To change particulate settings select: Setup\Particulate.

2. Particulate screen appears and includes the following adjustable elds:

+ Particulate eld (enable/disable pump collection), Prole eld (applying a correction factor), and

Gravimetric mass/volume elds (displays accumulated mass and air volume. These elds are

reset when performing gravimetric sampling.)

Adjusting the Impactor

To adjust the impactor, turn the turret until one of
the following is selected: PM2.5, PM4, PM10, or PM
(all dust ranging from 0 μm-100 μm).

+ The example (to right) illustrates the impactor

set to PM 2.5.

PM 2.5

NOTE: The dialed-in impactor setting is displayed

on a particulate measurement screen or
calibration screen .

Align to Impactor Arrow

3

Particulate Zero Calibration

Prior to calibrating, ensure the impactors are well-greased with an applied thin-lm of silicone grease.
(Please see “Impactor Care” on page 10 of EVM series user manual.)

1. Attach the Zero/HEPA lter and tubing

into the turret. Rotate the turret to PM.

2. Select Calibration from the Start screen

and select PM (using up/down arrows).

3. Press Cal softkey and then press

Start softkey. Once level is stabilized,
press Set softkey.

4. Once level has been set, you can press

Save or Cancel. (Please refer to
Chapter 4 of EVM series manual for
more information.)

Zero/HEPA Filter Example

Used for particulate zero cal.

Tubing and Vent Opening

Insert tubing into the
impactor of the labeled “2.5”
vent opening

Turret

Turn the turret so “PM”
appears on the display of
the EVM.

NOTE: Once saved, the instrument will apply the zero calibration to all proles. The zero calibration is

stored in the History screen and a calibration. Verify can be performed (to ensure no drifting).

Particulate Advanced Calibration (Gravimetric)

Gravimetric Calibration Overview

(1)Reset the gravimetric and volume accumulators; (2) Insert a new (sealed) gravimetric cassette;
(3) Measure in the specic location for approximately four to eight hours; (4) Record the value displayed
in the gravimetric accumulator eld displayed in the particulate screen. (This value is used in conjunction
with the weight of the measured dust in the cassette.); (5) Remove the gravimetric cassette and weigh
the ltered contents. (Typically, send to a lab for results.); (6) To determine the correction factor, calculate
the ratio between the particulate mass value and the weight from the gravimetric lter lab analysis.
(Ratio = true weight/EVM gravimetric displayed value). (7) Enter user correction value (Setup\Particulate
screen. Select prole eld and then press Edit softkey. Add Factor using up/down arrows. Press On/OFF/
Esc key twice to return to start screen.)

Logging Particulates

1. Before logging particulates, ensure the impactors are clean and well-greased.

2. From the start screen or any measurement screen, press key .

3. Press key to end the logged session. (See “Viewing logged results” to access past sessions.)

4

Volatile Organic Compounds (VOCs)

VOCs, air pollution with carbon-containing chemicals, are measured using a Photoionization detector

10.6eV. The EVM is equipped to notify you when maintenance and cleaning is required for the PID

sensor. A PID sensor error will appear indicating:
(1) if the sensor needs to be cleaned, or (2) the lamp needs replacing.

PID Zero Calibration

The PID ppm zero calibration preferred method is to ush with Zero Grade Air. Alternatively, Nitrogen
may be used. For best response time, it is recommended to set the ow rate at 1 LPM.

to the EVM series manual for more information on the PID ppm/ppb sensors.

1. Connect the Zero Grade Air, tubing, and calibration cup to the EVM.

(Please skip this step if you are not applying a gas.)

2. Select Calibration from the Start screen and select PID (using up/down arrows).

3. Press Cal softkey and then press Zero softkey. Once level is stabilized, press Set softkey.

(Typically takes 60 seconds to stabilize.)

4. Once level has been set, you can press Save or Cancel. (Disconnect components and return to the

start screen via On/O/Esc key.)

NOTE: Please refer

PID Span Calibration

Typically, Isobutylene is used when the VOCs are unknown.

will want to use the relevant VOC for your calibrated gas source for a ppm/ppb sensors.

(Please refer to the manual for PID correction factor table; Appendix C for details.)

1. Connect Isobutylene, regulator, tubing and cal cap to the EVM.

2. Follow steps 2-4 above (in PID Zero Cal. section) but select Span softkey instep 3.

NOTE: in order to measure specic VOCs, you

Logging VOCs

1. From the start screen or any measurement screen,

press key.

+ To view VOCs measurements, select either the Gas

or Composite screen by pressing keys from the
start screen.

2. Press key to stop logging. (See “Viewing logged

results” to access past sessions.)

Run Icon

Gas
Measurement
Screen

PID Sensor
Measurement

5

Toxic Gases

The following toxic gases table displays a quick overview of the ranges and the gases needed to perform
zero and span calibrations.

Type of Gas Range Res. Zero cal gas Span cal gas

Carbon Monoxide (CO) 0 -1000 ppm 1 ppm nitrogen/pure air CO

Chlorine (CL

) 0.0 - 20 ppm 0.1 ppm nitrogen/pure air CL

2

Ethylene Oxide (EtO) 0.0 - 20 ppm 0.1 ppm nitrogen/pure air EtO

Hydrogen Cyanide (HCN) 0.0 - 50 ppm 0.1 ppm nitrogen/pure air HCN

Hydrogen Sulde (H

Nitrogen Dioxide (NO

Nitric Oxide (NO) 0.0 - 100 ppm 0.1 ppm nitrogen/pure air NO

Oxygen (O

Sulphur Dioxide (SO2) 0.0 - 50 ppm 0.1 ppm nitrogen/pure air SO

S) 0 - 500 ppm 1 ppm nitrogen/pure air H2S

2

) 0.0 - 50 ppm 0.1 ppm nitrogen/pure air NO

2

) 0.0 - 30% 0.1% nitrogen

2

*1.0 L/min. ow rate

2

2

Room air

*span 20.9%

2

Carbon Dioxide Gas

Similar to toxic gases, the carbon dioxide sensor should be calibrated prior to logging.

Toxic and Carbon Dioxide Zero Calibration

Depending on the gas of interest, the toxic zero calibration is performed with the gas indicated in the
table above. The CO
and a hose/tubing. Nitrogen (N
gas, start at step 2.)

1. Connect the appropriate gas/pure air, regulator, tubing, and

calibration cup to the EVM.

2. Select Calibration from the Start screen and choose a specic

toxic using keys. (i.e., CO).

3. Press Cal softkey and then press Zero softkey. Once level

is stabilized, press Set softkey. (Allow at least 90 seconds
to stabilize.)

4. Press Save or Cancel softkey to store the process. Disconnect

components and return to the start screen via On/O/Esc key.

6

sensor requires a calibration gas, a regulator with at least 1.0 Liter/minute ow rate,

2

) is the recommended gas for a zero calibrating (If you are not applying a

2

Tubing

Regulator

Cal. Gas Source

Cal. Cup/Adapter

Toxic and Carbon Dioxide Span Calibration

To perform a span calibration with a specic toxic gas, please reference the toxic gas table. For the

span calibration, the range (or span) should be a sizeable fraction of the selected full scale range

CO

2

of the gas.

NOTE: The range for the CO2 sensor is 0 to 5,000 ppm. For a span calibration, it is recommended to span

cal to the value you will be measuring (i.e., 2,000 ppm).

1. Connect the appropriate gas, regulator, tubing and cal cap to the EVM.

2. Follow steps 2-4 (in Toxic Zero Calibration section) but select Span softkey in step 3.

(NOTE: For Oxygen span calibration, the typical span is 20.9%.)

Logging Toxic Gases or Carbon Dioxide

1. From the Start screen or any Measurement

screen, press key.

+ To view gas measurements, select either the

Gas or Composite screens (by pressing from
the start screen when Setup is selected.

2. Press key to stop logging. (See “Viewing

logged results” to access past sessions.)

CO2 Val ue

Toxic (CO)

Val ue

Run Icon

Composite
Measurement
Screen

Particulate advanced calibration (Gravimetric ltering)

Gravimetric Calibration Overview

(1)Reset the gravimetric and volume accumulators; (2) Insert a new (sealed) gravimetric cassette;
(3) Measure in the specic location for approximately four to eight hours; (4) Notate the value displayed
in the gravimetric accumulator eld (displayed in the particulate screen. (This value is used in
conjunction with the weight of the measured dust in the cassette.); (5) Remove the gravimetric cassette
and weigh the ltered contents. (Typically, sent to a lab for results.); (6) To determine the correction
factor, calculate the ratio between the particulate mass value and the weight from the gravimetric lter
lab analysis.

Measuring particulates

1. From the start screen or any measurement screen, press the key.

(Prior to logging, a 5 second count-down appears.)

2. Press key to end the logged session. (See “Viewing logged results” to view past sessions.)

7

Temperature and Relative Humidity

Logging/Viewing Temperature and/or Relative Humidity

The Temperature and Relative Humidity readings are viewable in either the Temp-RH measurement
screen or in the Composite screen.

Temp/RH
Measurements

Temp/RH
Measurement Screen

Particulate Air Flow

Calibration

For Airow meter calibration, an accurate ow meter (such as a primary standard calibrator) and tubing
is required.

1. Attach the primary standard calibrator tubing to the air ow outlet.

2. Navigate to the Setup\Calibration\Flow RT (rate) screen.

3. Press the Cal softkey and then press Start softkey.

4. Adjust the ow rate (using the up and down arrow keys) so the primary standard calibrator is 1.67 LPM

and then conrm by pressing the Save softkey.

NOTE: It should be noted that in order for the impactors to work properly the ow rate must be

adjusted to 1.67 LPM.

AirProbe Inlet
with Attachment

Air Flow Outlet
* To calibrate,

connect primary
standard calibrator
with tubing

8

Air Velocity

To view air velocity measurements, perform or verify the following:

1. The air velocity probe is enabled in Setup\AUX\Air Velocity screen.

2. Connect the air velocity probe and attachment to the EVM unit to the auxiliary Air probe inlet.

(See Air Probe inlets diagram in previous section, “Particulate Air Flow”.)

3. Turn Air Velocity Probe switch On.

4. Navigate to the Air Velocity measurement screen using keys.

Connect AirProbe to the Back Housing
(two inlets located near the air ow outlet.
See air ow diagram on previous page.)

Air Velocity Measurement Screen

Viewing Logged sessions (past sessions)

Once you have logged data and stopped the session, the data is stored under the past session summary
menu. (Optional: you can view the data in charts/graphs when downloaded to DMS.)

1. Navigate to Start \Past Session screen.

2. Select the File eld and press the File softkey. (Past Session\Load File screen will display all of the

logged les.) Press Ente r key to change between dierent le views.

3. Select the appropriate le (by using up/down arrows) and press the Load softkey.

4. Press Detail softkey to view data.

5. Press keys to view summary data.

Repeat as necessary.

Session Run Time

Summary Session

9

Maintenance/Cleaning

Sensors Locations

The gas sensors are inserted, factory calibrated, and ready for usage upon delivery. (The diagram below
is based on the EVM-7 model.) Occasionally, you may have to care for the sensors which will require
removing and inserting.

NOTE: Verify the unit is o and unplugged from the power cord before

removing or inserting sensors.

1. Remove the sensor bar (via the screws) and remove the manifold.

Manifold

2. Sensor bar removal and location of sensors are displayed below. When removing/inserting, align the

socket pins to the circuit board accordingly.

Sensor Bar - Remove Screw 1 & 2 and Lift O Cover

Screw 1

Toxic Sensor

Screw 2

PID Sensor

CO2 Sensor

Impactor Care and Particulates

The impactor requires periodic greasing and cleaning for particulate measuring only.

1. Remove the turret (red housing cover over the impactor) by removing the right and left screw with

the supplied allen wrench (stored behind
the access door.)

2. Remove all debris/dust with a Q-tip/cotton.

3. Wipe a very thin lm of silicone grease onto

the metal plates using a Q-tip/cotton.

4. Re-attach by placing the turret cover over

the housing and tighten screws.

Thin-layer of
Silicone is applied

to a clean impactor.

Example of
accumulated dust
(will form into
a pyramid)

10

Working with Quest Detection Management Software DMS

Communicating

1. When the EVM is On, plug the USB cable into the EVM and plug the opposite end to the USB port of

your computer. (Refer to illustration below.)

Viewing your data

In DMS once your les are downloaded via button, view the data in the panel layout view or
reports by clicking on appropriate buttons. See an example of the panel layout page below .

Download

11

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