Industrial Scientific Ventis MX4 User manual

Industrial Scientific
Ventis MX4: 4 Gas Meter

Objectives:
•Provide a foundation for further training
on your Ventis MX4
•Highlight how your Ventis MX4 benefits
fire service professionals
•Review basic care and maintenance for
your Ventis MX4

This training does not supersede users’
reading product information and manuals
that are received with these products.
Be sure to consult your department or
organizational guidelines in the operation of
these products.

Key Features:
•Over-Molded Composite Construction
•Four Gas Configuration in a Compact
Package
•Lithium Ion Extended Range Battery
•Integrated Sample-Draw Operation
(Integrated Pump)

Key Features (Cont’d):
•PEAK Reading Storage
•Short Term and TWA Levels
•Audible, Visual & Vibrating Alarms
•On-Board Continuous Data Logging
•4 Individual Sensors (many
manufacturers have 3 sensors, with 1
sensor doing double work).

Know your Gas Meter:
Backlit LCD
Visual Alarm
Lights
Integrated
Sampling
Pump
Two Button
Operation

Left Button
(Power/Menu
Button)
Right Button
(Enter/Command
Button)
Know your Gas Meter:

Sensors (Most Common Fire Service
Configuration):
•LEL: Lower Explosive Limit
•O2: Oxygen
•CO: Carbon Monoxide
•H2S: Hydrogen Sulphide
•Always Remember:
0, 0, 0, 20.9

LEL: Lower Explosive Limit
•Alarm is set at 10% LEL
•LEL: Minimum mixture
of combustible gas in air
that will cause an
explosion if exposed to
ignition.

O2: Oxygen
•Alarm Levels:
•Oxygen Deficiency (Low End): 19.5%
•Oxygen Enriched (High End): 23.5%

CO: Carbon Monoxide
•Alarm is set at 35 PPM
•CO is odorless, colorless, and toxic.
•CO is a by-product of combustion and is
lighter than air.

CO: Carbon Monoxide (cont’d):
Levels of Carbon Monoxide
Level (in PPM)
Time Exposed (in Minutes) Effects
200 60 - 120 Headaches/Nausea/Dizziness
800 45 Headaches/Nausea/Dizziness
800 180 Death
3200 10 Death
12800 1 - 3 Death

H2S: Hydrogen Sulphide
•Alarm is set at 10 PPM
•Odor of rotten eggs is a telltale sign.
•H2S desensitizes our sense of smell at
high concentrations.
•H2S is a product of decomposition of
organic matter.
•H2S is heavier than air.

H2S: Hydrogen Sulphide (cont’d)
•OSHA Permissible Exposure Limit
(PEL): 8 Hour TWA at 10 PPM
H2S Exposure Effects by PPM
Exposure (PPM)
Likely Side Effects
50-100 Eye Damage
100-150 Sense of Smell Disappears
320-530 Pulmonary Edema
530-1000 Rapid Breathing/Loss of Breath
Over 1000 Immediate Collapse

Starting Your Ventis MX4:
•Hold the Power (left) Button for 3 seconds
•A 20 second warn-up will begin
•Integrated pump will initiate at this time as
well.
•Always perform start-up prior to entering
suspected IDLH environment.
Left Button
(Power Button)

**Most Important Takeaway**:
•Required starting point for gas sampling:
•This can be accomplished one of two ways:
1. Gas detector will attempt to self clear during
start-up
2. If that does not happen follow the steps for
Function #2: Zero Out
H2S: 0 ppm
CO: 0 ppm
LEL: 0 %
O2: 20.9%

Sensing & Alarms:
Gas Detector Sensors & Alarm Levels
Sensor Sensing Purpose Alarm Activation
CO Carbon Monoxide @ 35 PPM
H2S Hydrogen Sulphide @ 10 PPM
O2 Oxygen @19.5% (Low)
@ 23.5% (High)
LEL Combustible @ 10%

Battery:
•Battery life indicator is on
the lower-left side of the
display.
•20 hours of operation on a
full charge in diffusion
mode
•12 house of operation on
full charge with
integrated pump

Functions from the Menu:
•Button Function:
oLeft Button: starts the menu of choices
oRight Button: confirms menu choices
•First (home) screen is your monitoring
screen which shows your 4 gas readings.
•Press the left button to cycle through the
various functions.
•Press right button to select or confirm the
desired function.

Functions from the Menu:
•Function #1: Calibration
oSymbol: A Calibration Cylinder
oThis indicates the number of days since
last calibration.