Quest Engineering EVM Series User manual
EVM Series Environmental Monitor
QUICK START
GUIDE
EVM and User Interface
2
Indicators
Softkey Menus
Up Arrow Key
Altf
Key
Enter Key
Right Arrow Key
Down Arrow Key
On/O and Esc Key
Display
Backlight
Particulate Pump
Left Arrow Key
Run/Stop 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.
Align to Impactor Arrow
PM 2.5
3
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 sucient 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 specic 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), Prole 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.
NOTE: The dialed-in impactor setting is displayed
on a particulate measurement screen or
calibration screen .
4
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.
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.)
NOTE: Once saved, the instrument will apply the zero calibration to all proles. 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 specic 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 prole 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.)
5
PID Sensor
Measurement
Run Icon
Gas
Measurement
Screen
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.
NOTE: Please refer
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.)
PID Span Calibration
Typically, Isobutylene is used when the VOCs are unknown.
NOTE: in order to measure specic VOCs, you
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.
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.)
6
Tubing
Regulator
Cal. Gas Source
Cal. Cup/Adapter
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 (CL2) 0.0 - 20 ppm 0.1 ppm nitrogen/pure air CL2
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 Sulde (H2S) 0 - 500 ppm 1 ppm nitrogen/pure air H2S
Nitrogen Dioxide (NO2) 0.0 - 50 ppm 0.1 ppm nitrogen/pure air NO2
Nitric Oxide (NO) 0.0 - 100 ppm 0.1 ppm nitrogen/pure air NO
Oxygen (O2) 0.0 - 30% 0.1% nitrogen
*1.0 L/min. ow rate
Room air
*span 20.9%
Sulphur Dioxide (SO2) 0.0 - 50 ppm 0.1 ppm nitrogen/pure air SO2
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 CO2sensor requires a calibration gas, a regulator with at least 1.0 Liter/minute ow rate,
and a hose/tubing. Nitrogen (N2) is the recommended gas for a zero calibrating (If you are not applying a
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 specic
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.
7
Toxic (CO)
Value
Run Icon
Composite
Measurement
Screen
CO2Value
Toxic and Carbon Dioxide Span Calibration
To perform a span calibration with a specic toxic gas, please reference the toxic gas table. For the
CO2span calibration, the range (or span) should be a sizeable fraction of the selected full scale range
of the gas.
NOTE: The range for the CO2sensor 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.)
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 specic 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.)
8
Temp/RH
Measurements Temp/RH
Measurement Screen
Air Flow Outlet
*To calibrate,
connect primary
standard calibrator
with tubing
AirProbe Inlet
with Attachment
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.
Particulate Air Flow
Calibration
For Airow 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 conrm 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.
9
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
Session Run Time
Summary Session
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.
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 Enter key to change between dierent 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.
10
Manifold
Sensor Bar - Remove Screw 1 & 2 and Lift O Cover
CO2 Sensor
Toxic Sensor
PID Sensor
Screw 1
Screw 2
Thin-layer of
Silicone is applied
to a clean impactor.
Example of
accumulated dust
(will form into
a pyramid)
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.
2. Sensor bar removal and location of sensors are displayed below. When removing/inserting, align the
socket pins to the circuit board accordingly.
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.
11
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
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TSI Incorporated.
TSI Incorporated
- Visit our website www.tsi.com for more information.
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Telephone: +1 800-680-1220 (USA)
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P/N 074-301 Rev E ©2018TSI Incorporated
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