Industrial Scientific Radius BZ1 Product Manual

Product Manual

The Essential Guide for Safety Teams and Instrument Operators

Edition: 7 May 30, 2018 Part Number: 17155915-1

Industrial Scientific Corporation, Pittsburgh, PA USA Industrial Scientific Co., Ltd. Shanghai, China © 2016, 2017, 2018 Industrial Scientific Corporation All rights reserved. Published 2018. Version 9

www.indsci.com/radius

Contents

General Information ....................................................................................................................................... 1

Certifications .............................................................................................................................................. 1

Warnings and Cautionary Statements ....................................................................................................... 2

Recommended Practices ........................................................................................................................... 4

First-use Checklist ................................................................................................................................. 4

Placement Guidelines ............................................................................................................................ 4

Gas and site factors ........................................................................................................................... 4

Wireless and GPS factors .................................................................................................................. 4

Maintenance .......................................................................................................................................... 5

Settings .............................................................................................................................................. 6

Utilities ............................................................................................................................................... 6

Biased Sensors ..................................................................................................................................... 7

Remote Sampling .................................................................................................................................. 8

Care and Storage .................................................................................................................................. 9

Product Information ..................................................................................................................................... 11

Instrument Overview ................................................................................................................................ 11

System Overview ..................................................................................................................................... 11

Key Features ........................................................................................................................................... 12

Modularity ............................................................................................................................................ 12

Power .................................................................................................................................................. 12

DualSenseTechnology ........................................................................................................................ 12

LENS Wireless .................................................................................................................................... 13

iNet Now .............................................................................................................................................. 13

Messaging ........................................................................................................................................... 13

Compatibilities ......................................................................................................................................... 14

Batteries and Power Supplies .............................................................................................................. 14

Sensors ............................................................................................................................................... 14

Docking Station and Software ............................................................................................................. 15

Sample Tubing Kits ............................................................................................................................. 15

Specifications........................................................................................................................................... 16

Instrument............................................................................................................................................ 16

Batteries .............................................................................................................................................. 16

Sensors ............................................................................................................................................... 17

Getting Started ............................................................................................................................................ 27

Unpacking ................................................................................................................................................ 27

Hardware Overview ................................................................................................................................. 28

Setup ....................................................................................................................................................... 31

Display Overview ..................................................................................................................................... 31

Settings ........................................................................................................................................................ 35

Guidelines ................................................................................................................................................ 35

Accessing Settings .................................................................................................................................. 35

Settings Overview .................................................................................................................................... 36

Display Overview (settings) ..................................................................................................................... 36

Working in Settings .................................................................................................................................. 37

Reviewing and Editing Settings ............................................................................................................... 38

Maintenance Options and Settings ...................................................................................................... 39

Start-up Settings .................................................................................................................................. 40

Operation Settings ............................................................................................................................... 41

Alarm Settings ..................................................................................................................................... 42

Sensor Settings ................................................................................................................................... 44

Admin Settings .................................................................................................................................... 45

Wireless Settings ................................................................................................................................. 47

Power .......................................................................................................................................................... 51

Charging the Battery ................................................................................................................................ 51

Power on ................................................................................................................................................. 52

Shutdown ................................................................................................................................................. 56

Quick-status Information .................................................................................................................. 56

Maintaining Battery Charge ..................................................................................................................... 56

Operation ..................................................................................................................................................... 57

Placing the Instrument ............................................................................................................................. 57

In-field Precautions .................................................................................................................................. 57

LENS Wireless ......................................................................................................................................... 57

Live Monitoring ........................................................................................................................................ 58

RGX Gateway ...................................................................................................................................... 58

Smart-device gateway ......................................................................................................................... 58

Gas Readings .......................................................................................................................................... 60

Operating the Instrument ......................................................................................................................... 60

Information........................................................................................................................................... 60

Utilities ................................................................................................................................................. 61

Alarms, Warnings, and Indicators ............................................................................................................ 63

Alarms ................................................................................................................................................. 63

Warnings ............................................................................................................................................. 66

Indicators ............................................................................................................................................. 66

Resolving Failures and Errors .................................................................................................................. 67

Maintenance ................................................................................................................................................ 71

Overview .................................................................................................................................................. 71

Guidelines ................................................................................................................................................ 71

iii

Process At-a-glance ................................................................................................................................ 71

Supplies and Preparation ........................................................................................................................ 72

Instruction ................................................................................................................................................ 72

Service and Warranty .................................................................................................................................. 75

Service ..................................................................................................................................................... 75

Guidelines ........................................................................................................................................... 75

Supplies ............................................................................................................................................... 75

Instruction ............................................................................................................................................ 76

Warranty .................................................................................................................................................. 81

Limitation of Liability ............................................................................................................................ 81

Appendix A .................................................................................................................................................. 83

Supplemental Information about Gases and Sensors .............................................................................. 83

Cross Sensitivity and Toxic Gases ...................................................................................................... 83

LEL and Combustible Gases ............................................................................................................... 83

Appendix B .................................................................................................................................................. 85

Supplemental information about the Extended Run Time Power Supply ................................................. 85

Appendix C .................................................................................................................................................. 86

Supplemental information about the Intrinsically Safe Extended Run Time Power Supply ...................... 86

Tables and Figures

Table 1.1 Hazardous area certifications ........................................................................................................ 1

Table 1.2 Wireless certifications .................................................................................................................... 2

Table 1.3 Warnings and cautionary statements ............................................................................................. 2

Figure 1.1 Sample placement plan for instruments in a LENS group ............................................................ 5

Table 1.4 Range guidelines for LENS Wireless connections ......................................................................... 5

Table 1.5 Recommended frequencies for instrument maintenance ............................................................... 7

Figure 2.1 System overview ........................................................................................................................ 12

Table 2.1 Compatible batteries .................................................................................................................... 14

Table 2.2 Compatible power supplies .......................................................................................................... 14

Figure 2.2 Compatible sensors and installation locations ............................................................................ 15

Table 2.3 Instrument specifications ............................................................................................................. 16

Table 2.4 Battery specifications ................................................................................................................... 16

Table 2.5 Sensor specifications ................................................................................................................... 18

Table 3.1 Package contents ........................................................................................................................ 27

Figure 3.1.A Hardware overview Radius BZ1 (front view; diffusion) ............................................................ 29

Figure 3.1.B Hardware overview Radius BZ1 (back view; aspirated) .......................................................... 30

Figure 3.2 Setup .......................................................................................................................................... 31

Figure 3.3 Display-screen overview during operation .................................................................................. 34

Table 4.1 Settings overview ......................................................................................................................... 36

Figure 4.1 Display screen overview in settings ............................................................................................ 37

Figure 4.2 Example for editing a single-step setting .................................................................................... 38

Figure 4.3 Example for editing a multistep setting ....................................................................................... 38

Table 4.2 Maintenance options and settings ............................................................................................... 39

Table 4.3 Start-up settings ........................................................................................................................... 40

Table 4.4 Operation settings ........................................................................................................................ 41

Table 4.5 Alarm settings .............................................................................................................................. 42

Table 4.6 Sensor settings ............................................................................................................................ 44

Table 4.7 Admin settings ............................................................................................................................. 45

Table 4.8 Wireless settings .......................................................................................................................... 47

Figure 5.1 Battery charging instruction ........................................................................................................ 52

Figure 5.2 Power-on process ....................................................................................................................... 55

Figure 5.3 Shut-down process ..................................................................................................................... 56

Table 5.1 Power supply run-time effects ...................................................................................................... 56

Figure 6.1 Sample live-monitoring application ............................................................................................. 59

Figure 6.2 Operation instruction .................................................................................................................. 62

Figure 6.3 Alarm-signal intensity ................................................................................................................. 63

Figure 6.4 Alarm and peer-alarm display-screen samples ........................................................................... 64

Figure 6.5 Alarms, possible causes, and relative signal intensity ................................................................ 65

Example: Peer instruments with one in high alarm .................................................................................. 65

Figure 6.6 Warning display-screen samples ................................................................................................ 66

Table 6.1 Warnings and indicators; causes and signal frequency ............................................................... 66

Table 6.2 Failures and errors ....................................................................................................................... 68

Figure 7.1 Maintenance supplies and preparation ....................................................................................... 72

Figure 7.2.A Zeroing instruction .................................................................................................................. 72

Figure 7.2.B Calibration instruction .............................................................................................................. 73

Figure 7.2.C Bump test instruction............................................................................................................... 74

Figure 8.1 Parts diagram for SafeCore Module and Radius Base ............................................................... 76

Table 8.1 Parts table for SafeCore Module and Radius Base ..................................................................... 76

Figure 8.2 Service tasks, Radius Base ........................................................................................................ 79

Figure 8.3 Service tasks, SafeCore Module ................................................................................................ 81

Table A.1 Cross-sensitivity guidelines (%) .................................................................................................. 83

Table A.2 LEL correlation factors................................................................................................................ 84

Figure B.1 Control drawing 1810D9387-200 revision 2 ............................................................................... 85

Figure C.1 Control drawing 1810D9387-200 revision 3 ............................................................................... 86

General Information

Certifications Warnings and Cautionary Statements Recommended Practices

Certifications

Radius® BZ1 Area Monitors can be manufactured to meet a variety of certifications including those 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

Area Classifications

Approved Temperature Range

ATEX

Ex da ia IIC T4 Ga, Equipment Group and Category II 1G

Ex db ia IIC T4 Gb with IR sensor installed, Equipment Group and Category II 2G

-20 °C to +55 °C

(-4 °F to + 131 °F)

CSAa

Class I, Division 1, Groups A, B, C, and D; T4

-20 °C to +55 °C (-4 °F to +131 °F)

Ex da ia IIC T4 Ga

-20 °C to +55 °C (-4 °F to +131 °F)

C22.2 No. 152 applies only to %LEL thermo-catalytic reading

-20 °C to +55 °C (-4 °F to +131 °F)

IECEx

Ex da ia IIC T4 Ga Ex db ia IIC T4 Gb with IR sensor installed

-20 °C to +55 °C

(-4 °F to + 131 °F)

INMETRO

Ex da ia IIC T4 Ga Ex db ia IIC T4 Gb with IR sensor installed

-20 °C to +55 °C

(-4 °F to + 131 °F)

Class I, Division 1, Groups A, B, C, and D; T4 Class 1 Zone 0 AEx da ia IIC T4 Ga Class 1 Zone 0 AEx db ia IIC T4 Gb with IR sensor

installed

-20 °C to +55 °C

(-4 °F to + 131 °F)

The following apply to instruments that are to be used in compliance with the CSA certification:

Radius BZ1 Area Monitor is CSA-certified according to the Canadian Electrical Code for use in Class I, Division 1 and Zone Classified Hazardous Locations within an ambient temperature range of T

amb

: -20 °C to +55 °C.

CSA has assessed only the %LEL thermo-catalytic combustible gas detection portion of this instrument for performance according to CSA Standard C22.2 No. 152 within an ambient temperature range of T

amb

: -20 °C to +55 °C. This is applicable when the monitor is used in the diffusion or aspirated mode and

has been calibrated to 50% LEL CH4.

In addition to the certifications listed below, refer to the Industrial Scientific websites for the most up-to-date information about wireless product certifications.

Table 1.2 Wireless certifications

Agency or authority

Identification number or registration number

Country or region

CNC

C-20586

Argentina

FCCa

U9O–SM220

USA

ICa

7084–SM220

Canada

ictQATAR

CRA/SA/2016/R-5371

Qatar

iDA

G1598-16

Singapore

TRA

TRA/TA-R/3210/16

Oman

TRA

ER46539/16

U.A.E.

TRC

TRC/LPD/2018/122

Jordan

Marking requirements INDUSTRIAL SCIENTIFIC CORP.; SAFECORE MODULE; Contains SM220

FCC ID: U9O-SM220; IC: 7084A-SM220

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 in Table 1.3 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.

For safety reasons, this equipment must be operated and serviced by qualified personnel only. Pour des raisons de sécurité, cet équipement doit être utiles entretenu et réparé uniquement par un personnel qualifié.

WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY. AVERTISSEMENT: LA SUBSTITUTION DE COMPOSANTS PEUT COMPROMETTRE LA SÉCURITÉ

INTRINSÈQUE.

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.

Sudden changes in atmospheric pressure may cause temporary fluctuations in gas 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.

Silicone and other known contaminants may damage the instrument's combustible gas sensors, which can cause inaccurate gas readings.

Do not use solvents or cleaning solutions on the instrument or its components.

Table 1.3 Warnings and cautionary statements

To support accurate readings, keep clean and unobstructed all filters, ports, and water barriers.

Perform all instrument service tasks in nonhazardous locations only. A service task is defined as the removal, replacement, or adjustment of any part on or inside the SafeCore® Module or Radius Base. Always power off the instrument before performing any service task.

Perform the maintenance procedures of zeroing, calibration, and bump testing in nonhazardous locations only. The Radius Base battery pack must be fully charged before its first use.

The Radius Base battery pack is to be replaced only by Industrial Scientific Corporation or authorized repair facility.

WARNING - DO NOT CHARGE THE BATTERY IN HAZARDOUS LOCATION. AVERTISSEMENT - NE PAS CHARGER L'ACCUMULATEUR DANS UN EMPLACEMENT DANGEREUX.

The compatible charging power supply (17155923) and cord is to be connected and used only in a nonhazdardous location. When the Radius BZ1 or Radius Base is in a hazardous location, the charging power supply cap must be installed

WARNING - ONLY CONNECT AND USE COMPATIBLE POWER SUPPLY ACCESSORIES FROM INDUSTRIAL SCIENTIFIC IN HAZARDOUS LOCATIONS ACCORDING TO INDUSTRIAL SCIENTIFIC CONTROL DRAWING 1810D9387-200. AVERTISSEMENT - SE CONNECTER ET UTILISER UNIQUEMENT DES ACCESSOIRES D'ALIMENTATION COMPATIBLES DE L'INDUSTRIAL SCIENTIFIC DANS DES ENDROITS DANGEREUX SELON LE SCHÉMA DE CONTRÔLE SCIENTIFIQUE INDUSTRIEL 1810D9387-200.

Access to the control drawing is provided in the accessory's product manual as listed below, and in the Appendices of this publication. Use each accessory in accordance with its Product Manual.

When a power supply accessory is not in use and the instrument or its base is in a hazardous-classified area, the IS power port cap must be installed.

Power supply accessory

Product manual part number

Extended Run Time Power Supply

17158385

Intrinsically Safe Extended Run Time Power Supply

17158248

Contains wireless device model SM220, FCC ID: U9O-SM220. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interferences, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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.

RF Exposure: This equipment complies with radiation exposure limits set forth for an uncontrolled environment by the Federal Communications Commission (FCC) of the United States; Innovation, Science and Economic Development Canada (ISED); and the European Council recommendation on the limitation of exposure of the general public to electromagnetic fields (1995/519/EC). This equipment should be installed and operated with minimum distance of 20 cm (8 ″) between the radiator and your body. This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter.

Table 1.3 Warnings and cautionary statements

Industrial Scientific recommends persons with a pacemaker or implantable cardio defibrillator (ICD) should maintain a minimum separation distance of 20 cm (8 ") between the pacemaker or ICD and a wireless enabled instrument. Please consult your physician or pacemaker or ICD manufacturer for additional guidance and recommendations.

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.

Recommended Practices

First-use Checklist

To prepare the Radius BZ1 instrument for first use, qualified personnel should ensure the following are completed:

• Instrument setup.

• Charge the battery.

• Review instrument settings and adjust them as needed.

• Calibrate the instrument.

• Complete a bump test.

• Train instrument users.

Placement Guidelines

To develop a placement plan for each unique, in-field application of Radius BZ1 instruments, keep in mind all relevant gas, site, and LENS™ Wireless (Linked Equipment Network for Safety) factors, which include but are not limited to the following.

Gas and site factors

• Know the densities of the target gases.

• Know or anticipate as much as possible the locations of potential leaks and other prospective gas

events.

• Consider the site's air temperature and its air-flow factors such as velocity and direction.

• Consider the site's terrain.

Wireless and GPS factors

Radius BZ1 gas-detection instruments are equipped with a radio that is used in the wireless connection of equipment items, within a LENS™ Wireless group, which permits the sharing of data (e.g., alarms) among instruments. LENS also supports the exchange of instrument data with iNet®, via a compatible gateway such as the RGX™ Gateway, to facilitate the live monitoring* of instruments within the group.

• For instruments that are set to perform in a LENS Wireless peer group, be aware that LENS

communicates in a nonlinear manner. With the placement of units A through F as shown below in Figure 1.1, messages can travel among instruments that may be separated by a structure (gray bar).

• When using LENS Wireless, ensure each instrument is assigned to the desired LENS group; create the

placement plan to account for each instrument being within range of at least one other instrument in its group. Use the range guidelines supplied below (see Table 1.4) to maintain each connection type.

*Available when the iNet Now service has been activated and all to-be-monitored instruments have been activated for live monitoring.

To achieve best performance for a unit that will use GPS, ensure the site provides large, open-sky access. Units used in an indoor environment cannot receive the signal required for GPS functionality.

As needed, supervise the in-field placement of instruments (see chapter 6, "Operation").

Figure 1.1 Sample placement plan for instruments in a LENS group

Table 1.4 Range guidelines for LENS Wireless connections

Line-of-sight distance, maximum

Radius BZ1 to Radius BZ1

300 m (328 yd)

Radius BZ1 to Ventis Pro

100 m (109 yd)a

Radius BZ1 to RGX Gateway

300 m (328 yd)

Applies when a Ventis Pro instrument is positioned to face the other instrument.

Maintenance

The procedures defined below help to maintain instrument functionality and support operator safety. They also help manage for the effects of sensor drift. Sensor drift is defined as a gradual shift in sensor output, which causes an error in the displayed gas reading. The shift can be either positive or negative and is typically caused by the conditions listed below.

• There are changes in environmental conditions such as temperature, pressure, humidity, or thermal

conductivity of the air.

• The sensor has cross sensitivity* to nontarget gases and has been directly exposed to one or more of

those gases, or is experiencing lingering, temporary effects from this type of exposure.

• The sensor has been zeroed or calibrated in an atmosphere that contains some concentration of the

sensor's target gas or some concentration of nontarget* gas to which the sensor responds.

• There are changes in the power state of a biased sensor. Biased sensors require continuous power

and may take a while to stabilize after being in a state of low or no power. Biased sensors installed in the Safecore Module are powered only by the module's "backup battery" when the module is out of the Radius Base or docking station. When the module is returned to the docking or Radius Base, there will be a warm-up period.

*For more information about the cross sensitivities of nontarget gases see "Appendix A, Supplemental Information about Gases and Sensors."

Industrial Scientific minimum-frequency recommendations for instrument maintenance 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 support 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 used to test the instrument or its components for functionality or performance, or to complete other maintenance tasks. Each utility is defined below.

Self-test.

The self-test checks the functionality of the instrument’s memory operations, battery, display screen, and each alarm-signal type (audible and visual).

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 occurs as the installed sensors are used or “consumed."

Note: After 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.

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.

*Complete only in areas known to be nonhazardous.

Table 1.5 Recommended frequencies for instrument maintenance

Procedure

Recommended minimum frequency

Settings

Before first use, when an installed sensor is replaced, and as needed.

Zero

Before first use; thereafter, zero the instrument every two weeks or when sensor drift is observed. Calibrationa

Before first use and monthly thereafter.

Bump testb

Before first use; thereafter, for sensors not operating on DualSense™, prior to each day’s use and, for sensors operating on DualSense, as needed between monthly calibrations.

Self-testc

As needed.

Between 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; fails a bump test; has been repeatedly exposed to an over-range (positive or negative) gas concentration; or its sensors are exposed to water or contaminants. A calibration is also recommended after the installation of a new or replacement sensor.

If 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.

When redundant sensors are operating on DualSense technology, bump testing these sensors may be done less frequently based on company safety policy.

The instrument performs a self-test during power on. When the instrument remains on, it will complete a self-test during each 12-hour period. The self-test can also be completed on demand through settings.

Note: The use of calibration gases not provided by Industrial Scientific may void product warranties and limit potential liability claims.

Biased Sensors

The functionality of biased sensors is dependent on their receipt of continuous power. When their power supply is interrupted, it is their nature to destabilize. This means a biased sensor needs time to restabilize after its power supply is removed or depleted, then restored. Stabilization time varies depending on the sensor type and the length of time it has been without power. Use the information and guidelines supplied below to support the stability of biased sensors installed in the SafeCore Module.

• Install the SafeCore Module into a fully charged Radius Base.

• When the module is installed in the Radius Base, its biased sensors will be powered by the base’s

rechargeable battery pack* if the Radius BZ1 is or is not powered on. If the base’s battery pack is depleted of charge, the sensors will draw power from the module’s backup battery.

• When the module is not installed in a Radius Base, its biased sensors will be powered by the module’s

backup battery to help maintain sensor stability.

When a biased sensor is in use and the Radius BZ1 emits a low battery warning or a low backup battery warning, complete the steps noted below.

Low battery warning

Low backup battery warning

• Charge the Radius Base battery.

• Replace the SafeCore module’s backup

battery.

• Power on the instrument.

• Install the module in a fully charged Radius

BZ1.

• Allow up to 24 hours for the biased sensor to

stabilize.

• Power on the instrument.

• Allow up to 24 hours for the biased sensor to

stabilize.

The power requirements of biased sensors can exceed the setpoint for the low backup battery warning. When a sensor’s required power exceeds what the backup battery can supply, the Radius BZ1 will indicate a sensor error, so in some cases, the cause of sensor error for a biased sensor may need to be treated as a low backup battery warning as described above.

See also “Care and Storage” below.

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 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.

o Use a thumb to block the end of the sampling line at the water-stop opening. This should

cause a pump-fault alarm.

o Remove 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 1.6 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)