Industrial Scientific Ventis Pro Series User manual

Product
Manual
The Essential Guide for
Safety Teams and
Instrument Operators
Edition: 9
September 15, 2017
Part Number: 17156830-1

Industrial Scientific Corporation, Pittsburgh, PA USA
Industrial Scientific Co., Ltd. Shanghai, China
© 2015, 2016, 2017 Industrial Scientific Corporation
All rights reserved. Published 2017.
Revision 6
www.indsci.com/ventispro

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Contents
General Information ......................................................................................................................................1
Certifications ................................................................................................................................................................................. 1
Warnings and Cautionary Statements .......................................................................................................................................... 3
Recommended Practices.............................................................................................................................................................. 6
Instrument Maintenance ........................................................................................................................................................... 6
First Use.................................................................................................................................................................................... 7
Wearing the Instrument............................................................................................................................................................. 7
LENS™ Wireless Considerations ............................................................................................................................................. 7
iNet Now Considerations .......................................................................................................................................................... 8
Remote Sampling ..................................................................................................................................................................... 8
Cold-weather Operation............................................................................................................................................................ 9
Product Information.....................................................................................................................................11
Overview ..................................................................................................................................................................................... 11
Key Features............................................................................................................................................................................... 11
LENS™ Wireless .................................................................................................................................................................... 11
iAssign™................................................................................................................................................................................. 12
Panic and man-down features ................................................................................................................................................ 12
Gas-alert and -alarm features ................................................................................................................................................. 12
iNet Now ................................................................................................................................................................................. 13
Gas-information access .......................................................................................................................................................... 13
Other key features .................................................................................................................................................................. 13
Compatibility ............................................................................................................................................................................... 14
Sensors................................................................................................................................................................................... 14
Batteries.................................................................................................................................................................................. 16
Equipment and software ......................................................................................................................................................... 16
iAssign accessories ................................................................................................................................................................ 17
Specifications.............................................................................................................................................................................. 17
Instrument ............................................................................................................................................................................... 17
Battery Specifications ............................................................................................................................................................. 18
Sensor Specifications ............................................................................................................................................................. 18
Getting Started............................................................................................................................................29
Unpacking the Instrument ........................................................................................................................................................... 29
Hardware Overview .................................................................................................................................................................... 30
Display Overview ........................................................................................................................................................................ 32
Power On .................................................................................................................................................................................... 38
Power Off .................................................................................................................................................................................... 41
Settings .......................................................................................................................................................43
Guidelines ................................................................................................................................................................................... 43

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Accessing Settings...................................................................................................................................................................... 43
Settings Menus ........................................................................................................................................................................... 44
Examples for Working in Settings ............................................................................................................................................... 44
Reviewing and Editing Settings .................................................................................................................................................. 46
Maintenance menu ................................................................................................................................................................. 46
Start-up menu ......................................................................................................................................................................... 49
Operation menu ...................................................................................................................................................................... 50
Alarm menu............................................................................................................................................................................. 52
Sensor menu........................................................................................................................................................................... 54
Admin menu............................................................................................................................................................................ 56
Wireless menu ........................................................................................................................................................................ 58
Operation.....................................................................................................................................................61
The Instrument Buttons............................................................................................................................................................... 61
The Instrument Display ............................................................................................................................................................... 62
Operating the Instrument ............................................................................................................................................................ 62
Information and LENS Wireless .............................................................................................................................................. 62
Utilities .................................................................................................................................................................................... 63
Wearing the Instrument............................................................................................................................................................... 64
Using Upgrade Cards ................................................................................................................................................................. 65
Using an iNet Now connected instrument................................................................................................................................... 65
User-site Assignments ................................................................................................................................................................ 65
Using LENS Wireless.................................................................................................................................................................. 66
Overview ................................................................................................................................................................................. 66
How to form, join, or leave a LENS Wireless group ................................................................................................................ 66
Peer gas readings................................................................................................................................................................... 68
Alarms and Warnings At-a-glance .............................................................................................................................................. 68
Alarms..................................................................................................................................................................................... 68
Warnings................................................................................................................................................................................. 70
Alarms, Warnings, and Notifications...........................................................................................................71
Overview ..................................................................................................................................................................................... 71
Alarms......................................................................................................................................................................................... 71
Warnings..................................................................................................................................................................................... 75
Indicators .................................................................................................................................................................................... 77
Failures and Errors ..................................................................................................................................................................... 77
Maintenance................................................................................................................................................79
Guidelines ................................................................................................................................................................................... 79
Process At-a-glance.................................................................................................................................................................... 79
Supplies and Preparation............................................................................................................................................................ 80
Instruction ................................................................................................................................................................................... 81

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Service and Warranty..................................................................................................................................85
Service ........................................................................................................................................................................................ 85
Guidelines ............................................................................................................................................................................... 85
Supplies .................................................................................................................................................................................. 85
Instruction ............................................................................................................................................................................... 86
Warranty ..................................................................................................................................................................................... 96
Limitation of Liability................................................................................................................................................................ 96
Appendix A..................................................................................................................................................98
Supplemental Information about Gases and Sensors ................................................................................................................ 98
Toxic Gases ............................................................................................................................................................................ 98
Combustible Gases................................................................................................................................................................. 99
Appendix B................................................................................................................................................101
Marking Requirements.............................................................................................................................................................. 101
Contact Information...................................................................................................................................102

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Tables and Figures
Table 1.1 Hazardous-area certifications ........................................................................................................................................... 1
Table 1.2 Wireless certifications ....................................................................................................................................................... 2
Table 1.3 Warnings and cautionary statements................................................................................................................................ 3
Table 1.4 Recommended frequencies for instrument maintenance ................................................................................................. 7
Figure 1.1 Snapshot of LENS Wireless peer-instrument locations ................................................................................................... 8
Table 1.5 Minimum sample time for common sample-line lengths .................................................................................................. 9
Figure 2.1.A Sensor compatibility and installation locations for the Ventis Pro4 ............................................................................ 14
Figure 2.1.B Sensor compatibility and installation locations for the Ventis Pro5 ............................................................................ 15
Table 2.1 Sensor compatibility and installation locations................................................................................................................ 15
Table 2.2 Battery compatibility........................................................................................................................................................ 16
Table 2.3 iAssign accessories compatibility................................................................................................................................... 17
Table 2.4 Instrument and pump specifications ............................................................................................................................... 17
Table 2.5 Battery specifications...................................................................................................................................................... 18
Table 2.6 Sensor specifications ...................................................................................................................................................... 19
Table 3.1 Package contents ........................................................................................................................................................... 29
Figure 3.1.A Hardware overview diffusion instrument .................................................................................................................... 30
Figure 3.1.B Hardware overview aspirated instrument ................................................................................................................... 31
Figure 3.2.A Reading the display during operation......................................................................................................................... 33
Figure 3.2.B Reading the display during an event (warning or alarm)............................................................................................ 34
Figure 3.2.C Reading the display during maintenance ................................................................................................................... 35
Figure 3.2.D Reading the display while working in settings............................................................................................................ 36
Figure 3.3 Power on........................................................................................................................................................................ 41
Figure 3.4 Power off........................................................................................................................................................................ 41
Table 4.1 Settings menus ............................................................................................................................................................... 44
Figure 4.1.A Example for editing a single-item setting.................................................................................................................... 45
Figure 4.1.B Example for editing a multi-item setting ..................................................................................................................... 46
Figure 4.2.A Navigating and using maintenance options................................................................................................................ 49
Figure 4.2.B Navigating and editing start-up settings .................................................................................................................... 50
Figure 4.2.C Navigating and editing operation settings ................................................................................................................. 51
Figure 4.2.D Navigating and editing alarm settings ....................................................................................................................... 53
Figure 4.2.E Navigating and editing sensor settings...................................................................................................................... 55
Figure 4.2.F Navigating and editing admin settings....................................................................................................................... 58
Figure 4.2.G Navigating and editing wireless settings .................................................................................................................... 59
Figure 5.1 Using the buttons during operation................................................................................................................................ 61
Figure 5.2 Home ............................................................................................................................................................................. 62
Figure 5.3 Operation instruction...................................................................................................................................................... 64
Figure 5.4 Using iAssign tags ......................................................................................................................................................... 65
Figure 5.5 LENS group peer-instrument locations.......................................................................................................................... 66
Figure 5.6 Form or join a LENS Wireless group ............................................................................................................................. 67

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Figure 5.7 Leave a LENS Wireless group....................................................................................................................................... 68
Figure 5.8 Access peer gas readings ............................................................................................................................................. 68
Table 6.1 Alarm events (list) ........................................................................................................................................................... 72
Figure 6.1 Alarm events (display screens)...................................................................................................................................... 75
Table 6.2 Warnings (list) ................................................................................................................................................................. 75
Figure 6.2 Warnings (display screens) ........................................................................................................................................... 77
Table 6.3 Failures and errors.......................................................................................................................................................... 77
Table 6.4 Critical errors................................................................................................................................................................... 78
Figure 7.1 Maintenance supplies and preparation.......................................................................................................................... 80
Table 7.1 Calibration failure: possible causes and recommendations............................................................................................ 84
Figure 8.1 Instrument diagram....................................................................................................................................................... 86
Figure 8.2 Pump module diagram................................................................................................................................................... 87
Table 8.1 Instrument and pump module parts list........................................................................................................................... 87
Figure 8.3 Service Tasks ................................................................................................................................................................ 96
Table A.1 Cross-sensitivity guidelines (%)..................................................................................................................................... 98
Table A.2 LEL correlation factors for the sensors 17155304-K, -L, and -M................................................................................... 99
Table A.3 LEL correlation factorsafor the sensor 17155304-U ................................................................................................... 100

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General Information
Certifications
Warnings and Cautionary Statements
Recommended Practices
Certifications
Certifications for the Ventis™ Pro4 Multi-Gas Monitor and Ventis™ Pro5 Multi-Gas Monitor, at the time of
this document's publication, are listed below in Tables 1.1 and 1.2. To determine the hazardous-area
classifications for which an instrument is certified, refer to its label or the instrument order.
Table 1.1 Hazardous-area certifications
Certifying Body
(CB)
Area Classifications
Approved
Temperature Range
ANZEx
Ex ia I Ma / Ex ia IIC T4 Ga
-40 °C to +50 °C
(-40 °F to +122 °F)
Ex d ia I Mb / Ex d ia IIC T4 Gb with IR Sensor
-20 °C to +50 °C
(-4 °F to +122 °F)
ATEXa
Equipment Group and Category II 1G, Ex ia IIC, equipment protection level
Ga, Temperature Class T4
Equipment Group and Category II 2G, Ex d ia IIC, equipment protection
level Gb, Temperature Class T4, with IR sensor
Equipment Group and Category I M1, Ex ia I, equipment protection level
Ma, Temperature Class T4
Equipment Group and Category I M1, Ex d ia I, equipment protection level
Ma, Temperature Class T4, with IR sensor
-40 °C to +50 °C
(-40 °F to +122 °F)
CSAb
Class I, Division 1, Groups A, B, C, and D, Temperature Class T4
Class I, Zone 1, Ex d ia IIC, Temperature Class T4
-40 °C to +50 °C
(-40 °F to +122 °F)
C22.2 No. 152 applies to %LEL reading for the sensor Part Number
17155304-K only
-20 °C to +50 °C
(-4 °F to +122 °F)
IECExa
Class I, Zone 0, Ex ia IIC, equipment protection level Ga, Temperature
Class T4
-40 °C to +50 °C
(-40 °F to +122 °F)

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Table 1.1 Hazardous-area certifications
Certifying Body
(CB)
Area Classifications
Approved
Temperature Range
Class I, Zone 1, Ex d ia IIC, , equipment protection level Gb, Temperature
Class T4, with IR sensor
INMETRO
Class I, Zone 0, Ex ia IIC, equipment protection level Ga, Temperature
Class T4
Class I, Zone 1, Ex d ia IIC, equipment protection level Gb, Temperature
Class T4, with IR sensor
-40 °C to +50 °C
(-40 °F to +122 °F)
MSHAC
Permissible for Underground Mines
-40 °C to +50 °C
(-40 °F to +122 °F)
UL
Class I, Division 1, Groups A, B, C, and D, Temperature Class T4
Class II, Division 1, Groups E, F, and G, Temperature Class T4
Class I, Zone 0, AEx ia IIC, Temperature Class T4
Class I, Zone 1, AEx d ia II C, Temperature Class T4, with IR sensor
-40 °C to +50 °C
(-40 °F to +122 °F)
aMarking requirements are reproduced in Appendix B.
bThe following apply to instruments that are to be used in compliance with the CSA certification: Ventis Pro4 and Ventis Pro5 instruments are
CSA certified according to the Canadian Electrical Code for use in Class I, Division 1 and Class I, Zone 1 Hazardous Locations within an
ambient temperature range of Tamb: -40 °C to +50 °C.
CSA has assessed only the %LEL combustible gas detection portion of this instrument (the sensor part number 17155304-K only) for
performance according to CSA Standard C22.2 No. 152. Within an ambient temperature range of Tamb: 0 °C to +50 °C, the accuracy is
±3%. Within an ambient temperature range of Tamb: -20°C up to 0°C, the accuracy is ±5%. This is applicable only when the monitor has
been calibrated to 50% LEL CH4.
CAUTION: CSA C22.2 No. 152 requires before each day’s usage, sensitivity must be tested on a known concentration of pentane or
methane equivalent to 25% or 50% of full scale concentration. Accuracy must be within -0% to +20% of actual concentration. Accuracy
may be corrected by referring to the zero and calibration section of the Product Manual.
ATTENTION : CSA C22.2 N°152 exige que la sensibilité de l’instrument soit testée avant l’utilisation quotidienne de l’instrument sur une
concentration connue de pentane ou de méthane équivalente à 25 % ou 50 % de la concentration totale. L'exactitude doit être entre -0 %
et +20 % de la concentration réelle. L’exactitude peut être corrigée en se référant à la partie concernant la mise à zéro et l’étalonnage
dans le Manuel du produit.
CMSHA requires the monitor be calibrated according to the procedures in the Product Manual only. MSHA also requires the monitor display
methane in the percent-by-volume mode (0-5%) for compliance determinations required by 30 CFR Part 75, subpart D.
Table 1.2 Wireless certifications
Agency or
authority
Identification number or registration
number
Country or region
FCC
PHH-VPX
USA
IC
20727-VPX
Canada

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Warnings and Cautionary Statements
Read and understand this Product Manual before operating or servicing the instrument. Failure to perform
certain procedures or note certain conditions—provided below and throughout the manual—may impair the
performance of the product, cause unsafe conditions, or both.
Table 1.3 Warnings and cautionary statements
If it appears that the instrument is not working correctly, immediately contact Industrial Scientific.
Only qualified personnel should operate, maintain, and service the instrument.
Substitution of components may impair intrinsic safety, which may cause an unsafe condition.
Substituer des composants peut compromettre la sécurité intrinsèque, ce qui peut résulter en une situation
dangereuse.
Do not use in oxygen-enriched atmospheres. If the atmosphere becomes oxygen enriched, it may cause
inaccurate readings.
Oxygen-deficient atmospheres may cause inaccurate readings.
A rapid increase in a gas reading that is followed by a declining or erratic reading may indicate an over-range
condition, which may be hazardous.
Sudden changes in atmospheric pressure may cause temporary fluctuations in gas readings.
Temperatures below -20 °C (-4 °F) are likely to cause decreased functionality in the instrument's display screen
and man-down feature.
Sudden changes in ambient-air temperature will cause a form of sensor drift in the Carbon Monoxide/Hydrogen
Sulfide (CO/H2S) sensor (part number 17155306-J) that will produce temporary variations in the sensor's
readings:
If the temperature suddenly increases, the CO reading will temporarily decrease and the H2S reading may
temporarily increase.
If the temperature suddenly decreases, the CO reading will temporarily increase and the H2S reading may
temporarily decrease.
The readings will stabilize when the sensor has acclimated to the change in temperature. For example, if the
ambient-air temperatures changes from a "room temperature" of 20 °C (68 °F) to an outdoor temperature of 0
°C (32 °F), the stabilization time is approximately 15 minutes; with smaller or larger changes in temperature,
stabilization time will be shorter or longer, respectively.
Note: If the sensor is to be zeroed after a sudden change in ambient-air temperature, allow the sensor and its
readings to stabilize before zeroing.
The Long-life O2 sensor (part number 17155304-Y) is a biased sensor, requiring continuous power to operate to
specification. Continuous power is provided by a charged battery, regardless if the instrument is powered on. If
no power is provided to the sensor, it will experience sensor drift and generate erroneous readings.
If an instrument containing this sensor experiences a state of no charge, sensor drift will likely occur. If so,
Industrial Scientific recommends that the instrument be installed on a compatible charger or docking station. If
installed on a docking station, the instrument may fail calibration, but can remain docked to charge. After
charging*, undock the instrument; then, redock the instrument or zero it manually. If the instrument does not
pass zero, repeat the zero.
*If the sensor has been in a no-power state for seven days, it may require a charge period of up to three hours. Charge time
will vary based on how long the sensor has been in a no-charge state.

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Table 1.3 Warnings and cautionary statements
To avoid potentially inaccurate readings for some applications—monitoring for gases other than O2, CO, CO2,
H2S, and combustible gases [LEL/CH4]—only use a leather case as a carrying case. Do not power on, operate,
or power off the instrument while it is in a leather case.
Silicone and other known contaminants may damage the instrument’s combustible gas sensors, which can
cause inaccurate gas readings.
To support accurate readings, keep clean and unobstructed all filters, sensor ports, water barriers, and pump
inlet.
Charge the instrument’s battery only in nonhazardous locations. Chargez la batterie de l’instrument uniquement
dans des lieux sans danger.
Charge the instrument's battery using only compatible accessories from Industrial Scientific, including the
chargers listed below.
Part Number
Description
18108191
Ventis Single-Unit Charger
18108209
Ventis Single-Unit Charger/Datalink
18108651
Ventis Single-Unit Automotive Charger,12VDC
18108652
Ventis Single-Unit Truck-Mount Charger, 12VDC, with Cigarette Adapter
18108653
Ventis Single-Unit Truck-Mount Charger, 12VDC, Hard Wired
Perform all instrument service tasks and maintenance procedures in nonhazardous locations only. This
includes the removal, replacement, or adjustment of any part on or inside the instrument or its pump.
Exécutez toutes les procédures de service les tâches de service sur l’instrument uniquement dans des lieux
sans danger. Ceci comprend la dépose d’une pièce positionnée sur l’instrument ou à l’intérieur de celui-ci, ou
bien la rechange ou le réglage d’une telle pièce.
Battery contacts are exposed on batteries when they are removed from the instrument. Do not touch the battery
contacts and do not stack batteries on top of each other.
Do not use solvents or cleaning solutions on the instrument or its components.
The radios in the Industrial Scientific Ventis Pro 4 and Ventis Pro 5 Portable Multi Gas monitors have been
assessed to and found to be below limits as defined in FCC; Innovation, Science and Economic Development
Canada; and European Council recommendation 1995/519/EC requirements for human exposure to
electromagnetic fields.
This equipment has been tested and found to comply with the limits for a Class A 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 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. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense.
The instrument complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired
operation.
Changes or modification made that are not expressly approved by the manufacturer could void the user’s
authority to operate the equipment.

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Table 1.3 Warnings and cautionary statements
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the
following two conditions: (1) this device may not cause interference, and (2) this device must accept any
interference, including interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage
est susceptible d'en compromettre le fonctionnement.
The Ventis Pro 4 and Ventis Pro 5 Portable Multi Gas Monitors contain 3 radio communication modules that
generate radio frequency energy. They frequencies and output powers are listed below:
Maximum Transmit Power
NFC
13.56 MHz
-43.2 dBm (0.000048 mW)
Bluetooth Low Energy
2402 to 2480 MHz
0 dBm (1 mW)
LENS Wireless
2405 to 2480 MHz
3 dBm (2 mW)
Industrial Scientific recommends persons with a pacemaker or implantable cardio defibrillator (ICD) should
maintain a minimum separation distance of 15 cm (6 ") between the pacemaker or ICD and a wireless-enabled
instrument. Please consult your physician or pacemaker or ICD manufacturer for additional guidance and
recommendations.
MSHA Conditions of Safe Use
The diffusion versions of the Ventis Pro 4 and Pro 5 are approved for use with either the rechargeable P/N
17134453-X2, or P/N 17148313-2 (extended) 3.7 volt, lithium-ion batteries only.
The batteries are not user-replaceable.
The aspirated version of the Ventis Pro 4 and Pro 5 is approved for use with the P/N 17148313-2 extended
battery only.
To be charged on the surface or underground in accordance with 30 CFR 75.340 (the applicable regulations
pertaining to battery-charging stations) and MSHA Program Information Bulletin PIB P11-12.
Charge monitors with an Industrial Scientific Corporation charger designed for use with this monitor.
Calibrate according to the procedures in the Product Manual, Document No. 17156830-1.
The monitor must display methane in the percent-by-volume mode (0-5%) for compliance determinations
required by 30 CFR Part 75, Subpart D.
The respective minimum distances that shall be maintained between the Ventis Pro 4 or Pro 5 monitors and any
blasting circuits, explosives and detonators for MSHA and the PA Department of Environmental Protection are:
MSHA - 6 inches (15.2 cm)
PA DEP - 30 inches (76 cm)

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Recommended Practices
Instrument Maintenance
The procedures defined below help to maintain instrument functionality and support operator safety.
Industrial Scientific minimum-frequency recommendations for these procedures are summarized below in
Table 1.4. These recommendations are provided to help support worker safety and are based on field data,
safe work procedures, industry best practices, and regulatory standards. Industrial Scientific is not
responsible for determining a company’s safety practices or establishing its safety policies, which may be
affected by the directives and recommendations of regulatory groups, environmental conditions, operating
conditions, instrument use patterns and exposure to gas, and other factors.
Settings
Settings control how an instrument will perform. They are used to help ensure the instrument is in
compliance with company safety policy and applicable regulations, laws, and guidelines as issued by
regulatory agencies and government or industry groups.
Utilities
Maintenance procedures are known as "utilities". Utilities are primarily used to test the instrument or its
components for functionality or performance. Each utility is defined below.
Self-test.
The self-test is used to test the functionality of the instrument’s memory operations, battery, display screen,
and each alarm signal type (audible, visual, and vibration).
Bump Test (or "functional test").
Bump testing is a functional test in which an instrument's installed sensors are to be briefly exposed to (or
“bumped” by) calibration gases in concentrations that are greater than the sensors’ low-alarm setpoints.
This will cause the instrument to go into low alarm and will indicate which sensors pass or fail this basic test
for response to gas.
Zero.
Zeroing adjusts the sensors’ “baseline” readings, which become the points of comparison for subsequent
gas readings. It is a prerequisite for calibration. During zeroing, the installed sensors are to be exposed to
an air sample from a zero-grade-air cylinder or ambient air that is known to be clean air. If there are gases
in the air sample that are below the lowest alarm level, the instrument will read them as zero; its task is to
read the air sample as clean air. The user's task is to ensure the air is clean.
Calibration.
Regular calibrations promote the accurate measurement of gas concentration values. During calibration, an
instrument’s installed sensors are to be exposed to their set concentrations of calibration gases. Based on
the sensors’ responses, the instrument will self-adjust to compensate for declining sensor sensitivity, which
naturally occurs as the installed sensors are used or “consumed”.
Note: During calibration, the span reserve percentage value for each sensor is displayed. An indicator of a sensor's remaining
life, when the value is less than 50%, the sensor will no longer pass calibration

7
Docking.
When docked, instruments that are supported by iNet® Control or DSSAC (Docking Station Software
Admin Console) will be maintained for all scheduled bump tests and calibrations, synchronized for any
changes to settings, and upgraded for improvements from Industrial Scientific.
Other Maintenance.
The time-weighted average (TWA), short-term exposure limit (STEL), and peak readings can each be
"cleared". When any summary reading is cleared, its value is reset to zero and its time-related setting is
also reset to zero.
Table 1.4 Recommended frequencies for instrument maintenance
Procedure
Recommended minimum frequency
Settings
Before first use, when an installed sensor is replaced, and as needed.
Calibrationa
Before first use and monthly thereafter.
Bump testb
Before first use and prior to each day’s use thereafter.
Self-testc
As needed.
aBetween regular calibrations, Industrial Scientific also recommends a calibration be performed immediately following each of these incidences:
the unit falls, is dropped, or experiences another significant impact; is exposed to water; fails a bump test; or has been exposed to an over-
range (positive or negative) gas concentration. A calibration is also recommended after the installation of a new (or replacement) sensor.
bIf conditions do not permit daily bump testing, the procedure may be done less frequently based on instrument use, potential exposure to gas,
and environmental conditions as determined by company policy and local regulatory standards.
bWhen redundant sensors are operating on DualSense® technology, bump testing these sensors may be done less frequently based on
company safety policy.
cThe instrument performs a self-test during power on. For an instrument that is set for always-on, the instrument will automatically perform a
self-test every 24 hours. The self-test can also be completed on demand by the instrument user.
Note: The use of calibration gases not provided by Industrial Scientific may void product warranties and limit potential liability claims.
First Use
To prepare the Ventis Pro Series instrument for first use, qualified personnel should ensure the following
are completed:
Charge the battery.
Review instrument settings and adjust them as needed.
Calibrate the instrument.
Complete a bump test.
Wearing the Instrument
Based on the U.S. Department of Labor's Occupational Safety and Health Administration (OSHA) definition
of the breathing zone, it is recommended that the instrument be worn within a 25.4 cm (10") radius of the
nose and mouth. Refer to OSHA and to other agencies or groups as needed for additional information.
LENS™ Wireless Considerations
LENS™ Wireless (Linked Equipment Network for Safety) from Industrial Scientific is used to form wirelessly
connected instrument "groups". It allows the communication of gas readings, alarms, and other data among
LENS-connected "peer" instruments.

8
LENS data travel in a nonlinear manner. With the locations of peer instruments A through F as shown
below in Figure 1.1, messages travel among instruments that may be separated by distance or by a
structure (gray bar). For example, if instrument "E" experiences an alarm, the other instruments in the
group will experience a peer alarm, which will include details about the instrument that is in alarm.
As a guideline, a line-of-sight distance up to 100 m (109 yd), between two Ventis Pro instruments that
are facing each other, allows an instrument to maintain membership in its group.
Figure 1.1 Snapshot of LENS Wireless peer-instrument locations
iNet Now Considerations
iNet Now is a live-monitoring software solution from Industrial Scientific. Using Bluetooth technology, gas-
detection instruments, and smart devices, it delivers to safety team members instrument gas readings,
alarms, and other data—in real time.
When iNet Now is in use, the following apply.
An in-range smart device must be running the iNet Now Sync app.
A line-of-sight distance of up to 30 m (32 yd)—between the Ventis Pro and the smart device—generally
serves to maintain the Bluetooth connection.
If a Ventis Pro has lost its connection to the smart device, its data upload to iNet Now can be
maintained only when it is part of a LENS group that includes no more than six instruments, and at
least one instrument in the group is communicating with any smart device that is running the iNet Now
Sync app.
Remote Sampling
When sampling with a motorized pump and sampling line, Industrial Scientific recommends the following:
Choose the tubing type based on the target gases. If the target gases are known, use Teflon-lined
tubing when sampling for these gases: chlorine (Cl2), chlorine dioxide (ClO2), hydrogen chloride (HCl),
and volatile organic compounds (VOCs). For other known target gases, urethane tubing or Teflon-lined
tubing may be used.
When the target gases are unknown, use Teflon-lined tubing.
Know the length of the sample line as it is a factor in determining sampling time. A sample line may
consist of tubing, a probe, or a probe and tubing. It should also have a dust filter–water stop installed at
the line's end that will extend into the sample area. Sample-line length is defined as the distance from

9
the dust filter–water stop opening to the point where the line connects to the pump's inlet. Ensure
sample-line length does not exceed the pump's maximum draw.
Before and after each air sample, perform a test of the full sampling line.
oUse a thumb to block the end of the sampling line at the water-stop opening. This should
cause a pump-fault alarm.
oRemove the thumb from the water-stop opening. After the alarm cycle completes, the pump
should resume normal operation.
Note: If a pump fault does not occur, check and correct for cracks or other damage, debris, and proper installation in
these areas: the sampling line and its connections, the pump's inlet cap and inlet barrel, and the dust filter-water stop
items at the end of the sampling line and inside the pump inlet barrel.
Based on sample-line length, calculate the minimum time recommended for the air sample to reach the
instrument's sensors. As shown below, use a base time of 2 minutes, and add 2 seconds for each 30
cm (1 ') of line length. Watch the display screen for gas readings and, if present, allow them to stabilize
to determine the reading.
Table 1.5 Minimum sample time for common sample-line lengths
Sample-line length
Base time
(minutes)
+
Sample-line-length
factor
=
Minimum sample time
(mm:ss)
3.05 m (10 ')
2 min
+
(10 ' x 2 s)
=
02:20
6.10 m (20 ')
2 min
+
(20 ' x 2 s)
=
02:40
9.14 m (30 ')
2 min
+
(30 ' x 2 s)
=
03:00
12.10 m (40 ')
2 min
+
(40 ' x 2 s)
=
03:20
15.24 m (50 ')
2 min
+
(50 ' x 2 s)
=
03:40
18.29 m (60 ')
2 min
+
(60 ' x 2 s)
=
04:00
21.34 m (70 ')
2 min
+
(70 ' x 2 s)
=
04:20
24.38 m (80 ')
2 min
+
(80 ' x 2 s)
=
04:40
27.43 m (90 ')
2 min
+
(90 ' x 2 s)
=
05:00
30.48 m (100 ')
2 min
+
(100 ' x 2 s)
=
05:20
Cold-weather Operation
Use caution when operating the instrument in temperatures below -20 °C (-4 °F), which can diminish
display-screen legibility and man-down functionality. To help support functionality and available battery
power, the following practices are recommended.
Do not operate the instrument in temperatures that are not within the temperature ranges of the
installed sensors (see "Table 2.6, Sensor specifications").
Use a compatible, fully charged extended range battery.
Before using the instrument in the cold-weather environment, power it on a warm-up environment
(approximately 20 °C [68 °F]).
Alternately operate the instrument in the cold-weather and warm-up environments.
Do not operate the instrument unmanned.

2
Product Information
Overview
Key Features
Compatibility
Specifications
Overview
The Ventis™ Pro Series portable gas monitors are used for personal protection to monitor for oxygen and a
variety of toxic gases and combustible gases.
Twelve compatible sensors are available for use with the Ventis™ Pro4 Multi-Gas Monitor, which can
provide readings for up to four gases. These sensors are among the 19 available for use with the Ventis™
Pro5 Multi-Gas Monitor, which can provide readings for up to five gases.
The instruments take gas readings every second and record readings-related data every ten seconds. Data
are stored in the instrument data log, which has these characteristics:
Capacity for approximately three months of readings for a unit that is on 10 hours a day and has four
installed, operational sensors
Data storage for up to 60 alarm events, 30 error events, and 250 manual calibrations and bump tests
Downloadable using compatible accessories that are supported by iNet® Control, DSSAC, or
Accessory Software from Industrial Scientific.
Ventis™ Pro Series instruments use a multisensory alarm-warning-indicator system comprising audible,
visual, and vibration signals.
The instrument's display-screen language can be set to one of several available language options.
Key Features
LENS™ Wireless
Ventis Pro instruments are equipped with LENS™ Wireless (Linked Equipment Network for Safety), a long-
range, power-efficient wireless mesh network from Industrial Scientific. LENS Wireless functionality is
available when an instrument is ordered or can be later activated by the customer.
LENS functionality enables instrument-to-instrument communication of data through wirelessly connected,
ad-hoc-formed "instrument groups" or "peer groups". A LENS group can accommodate from 2 to 25 peer

12
instruments. Each LENS group can include Ventis Pro Series instruments, Radius™ BZ1 Area Monitors, or
both.
As groups are formed, if instrument "A" belongs to a LENS group and instrument "X" connects to
instrument "A", instrument "X" will be connected to all peer instruments in the group. When any peer-group
gas-detection instrument is within range of any other instrument in the group, they share their alarms, gas
readings, and other data. This allows in-field personnel to learn of and respond to hazardous events or
conditions that originate with any instrument that is operating in a LENS group.
Data communicated using LENS Wireless can be secured with the default encryption key from Industrial
Scientific. LENS allows for the customer to optionally use its own custom key*. When an encryption key is
used, data are encrypted during the instrument-joining process.
LENS functionality requires no central controller, network configuration, or infrastructure.
*Requires iNet Control or DSSAC (Docking Station Software Admin Console) from Industrial Scientific.
iAssign™
Programmed iAssign™ tags can be used by the instrument operator to assign an instrument to the user-
site data on his or her tag. This can help promote a sense of ownership among instrument operators,
encouraging their responsible use of the equipment. User and site values are also associated with alarm
events and other instrument data that are important to users of Industrial Scientific software products.
The iAssign Beacon is used to change an instrument's site assignment as the instrument enters or leaves
the Beacon's range. It is also used to help restrict access to an area: an instrument's "proximity alarm" will
be activated when the access level for its current user assignment is lower than the Beacon's access
setting.
Panic and man-down features
The panic button provides instrument operators with the ability to turn on the instrument’s high-level alarm.
This can signal others who are nearby that the instrument operator is in distress, someone else is in
distress, or there is some concern about in-field circumstances.
The man-down feature allows the instrument to sense when it has not moved. A man-down warning or
alarm may indicate the instrument operator is unable to move or press the panic button, or that the
instrument has become separated from its operator. Both the warning and alarm can be turned off by the
user.
Gas-alert and -alarm features
The optional "acknowledgeable gas alert" feature warns the instrument operator of the presence of gas in
concentrations that may be approaching the instrument’s alarm setpoints. This can prompt the instrument
operator to check the display screen for gas readings and for an optional instructional message; the
instrument operator can reset the alert.
The safety team can provide instrument operators with up to 26 customized, instructional messages*. The
opportunities include a message that displays during the start-up sequence and those that display during
gas events. A unique "alarm action message" (e.g., "EVACUATE") can be set for each of these events for
each installed sensor: gas present (alert, low alarm, and high alarm), STEL, and TWA.
The optional "full screen alarm" setting is used to display easy-to-read alarm details in large type.