Related Manuals for MSA ORION
Summary of Contents for MSA ORION
- Page 1 FIRE AND RESCUE NSW E C O M M E N D E D R A C T I C E O U R E A D E T E C T O R M S A O R IO N 02 , I 2011, CID: 065 53 E RS I O N...
- Page 2 Working file located at Equipment Development Unit, Greenacre (filed by CI number) This document rescinds: Operations Bulletin 2008/07: Orion gas detector extension probe, Ver 01. Recommended practice: Orion four-head gas detector, Ver A. Has this document been printed or copied? Check you have the most recent version by comparing the version number and the issue date on the footer with those of the document on station portal on the Intranet.
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Page 3: Table Of Contents
Four-Head Gas Detector: MSA Orion CONTENTS Using this Document Warnings, Cautions and Notes Electronic navigation Document control Specific Equipment Warnings Section Introduction Manual structure General Limitations 1.3.1 Intrinsic safety Reading Contact Section Equipment Fact Sheet Kit contents Main features Control layout 2.3.1... - Page 4 Four-Head Gas Detector: MSA Orion Operations 3.4.1 Operational hints 3.4.2 Heartbeat indicator 3.4.3 Alarms – general 3.4.4 Gas concentration alarms 3.4.5 Battery condition and alarm 3.4.6 Datalogging Turning Off Section Maintenance Maintenance schedule After use Changing batteries Changing filters 4.4.1 External water stop 4.4.2...
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Page 5: Using This Document
Your cursor icon will change to a pointing finger when over a link. Click these to go to the referenced section, table or figure. D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\How to Use.fm © Copyright State of NSW (Fire and Rescue NSW) 2011... -
Page 6: Document Control
Station Portal on the Intranet. Station Portal will always display the most recently approved document. D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\How to Use.fm © Copyright State of NSW (Fire and Rescue NSW) 2011... -
Page 7: Specific Equipment Warnings
Four-Head Gas Detector: MSA Orion SPECIFIC EQUIPMENT WARNINGS This is a summary of important warnings and cautions regarding the Orion four-head detector. It is not an exhaustive list of all the warnings and cautions you will find as you read the recommended practice. WARNING Always wear breathing apparatus (BA) when there is any possibility of a hazardous atmosphere. - Page 8 Four-Head Gas Detector: MSA Orion This page has been intentionally left blank. D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Equip Warnings.fm © Copyright State of NSW (Fire and Rescue NSW) 2011...
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Page 9: Introduction
General This Recommended Practice instructs firefighters in the use of the Mine Safety Appliances Company Orion four-head gas detector (Orion). For how you will use the Orion at an incident, refer to your training material. Figure 1 The Orion four-head gas detector... -
Page 10: Limitations
The Orion must only be used by people trained in its operation. The Orion has a simple, two button operation. It is powered by three AA alkaline cells. It features an automatic datalogging facility. The Orion uses four sensors to detect: •... -
Page 11: Intrinsic Safety
Four-Head Gas Detector: MSA Orion If the atmosphere is rich or deficient in oxygen, the Orion’s combustible and toxic gas readings can be affected. High humidity can lessen oxygen readings over time. The Orion should not be used to monitor: •... -
Page 12: Equipment Fact Sheet
• screw driver with Phillips head and two sizes of Allen key • quick reference card. Regulator for calibration gas. Orion, with rubber boot, carry strap and quick start guide. Sampling wand. Recommended practice (not shown). D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm... -
Page 13: Main Features
Four-Head Gas Detector: MSA Orion Main features Figure 3 Orion gas detector main features Table 2: Orion main features Part Explanation Alarm lights Flash red during alarm conditions. Pump cap The pump cap covers the sensors. This section of the LCD displays date, time, battery charge, and alarm indicators. -
Page 14: Control Layout
Shows the current Short Term Exposure Limit for the CO and the H S sensors, as calculated by the Orion from instant readings. The STEL flag comes on, and the STEL values appear in the relevant parts of the LCD. See A.1: ‘Short Term Exposure... - Page 15 PPM H values are also displayed here when those options are chosen. Figure 4 The Orion LCD showing the instant reading display in clean air The battery flag displays at all times. Instant readings for %LEL, %O , ppm CO, and ppm H S are displayed.
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Page 16: Control Buttons
Press and hold Change/Reset for three seconds to enter Calibration menu. • Press Change/Reset to refuse options given by the Orion. At all times, leaving the control buttons returns the Orion to instant reading mode. D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm... -
Page 17: Specifications
Explosive concentrations of gas groups IIA, IIB and IIC continuously present. For ambient temperatures between 40 ºC and 50 ºC, the Orion is rated at T3, and is safe in an explosive concentration of any gas having an ignition point above 200 ºC. -
Page 18: Sensor Specifications
If the start-up challenge test gives a result outside ± 10% of the challenge gas specifications, the unit must be calibrated before use. NOTE Oxygen response time is up to 3 minutes if the Orion is calibrated outside the normal temperature range. D.I. -
Page 19: Principles Of Operation
• a dust filter located on the rear of the Orion, • an internal water stop located in the body of the Orion under the dust filter. 2.5.2 Principles of calibration Calibrating the Orion involves these concepts: a) The instrument is first zeroed. -
Page 20: Operations
CO and/or H • the explosive hazard presented by combustible gases. In addition, the oxygen concentration shown by the Orion can be used as an indicator of other contaminants. See Section 3.4.1: ‘Operational hints’ on page 24 for more information. -
Page 21: Protective Clothing
Four-Head Gas Detector: MSA Orion 3.1.2 Protective clothing While using the Orion, firefighters must wear a minimum of: • • structural firefighting ensemble • general purpose gloves. If required, firefighters must wear a higher level of chemical protective clothing suitable to protect against the hazard. -
Page 22: Navigating Lcd Pages
Four-Head Gas Detector: MSA Orion Navigating LCD pages Scroll through the Orion’s LCD pages by pressing On/Off/Page. Figure 6 Orion display page flowchart Instant reading Press Page Press Wait Hold Clear Peak On/Off Reset 10 secs Peak? Press Page Press... -
Page 23: Before Operations
It may be possible for a nut in the handle of the wand to come loose. This nut connects the gas sample line from the Orion body to the handle of the extension probe, and is at the opposite end of the handle to where the water stop is fitted. The Fire and Rescue NSW has a program of securing these nuts by applying a thread locker. -
Page 24: Turning On And Pre-Operational Checks
Figure 9 The sampling wand, correctly assembled 3.3.2 Turning on and pre-operational checks Turn on the Orion by pressing On/Off/Page. The following steps must be performed before operations: a) Assemble the wand and check all connections. b) Zero the Orion. -
Page 25: Zero The Orion
To zero at start-up: a) Turn on the Orion in known clean air, away from truck exhausts, etc. b) The Orion will go through warm-up. Then for 10 seconds the Zero flag flashes, offering the option of zeroing. c) Ensure readings are stable, with %LEL, CO and H S reading zero, and O reading 20.8%. -
Page 26: Challenge Test
This confirms that the instrument calibration is valid. To perform the challenge test: a) Use the gas cylinder provided in the Orion kit. Check the gas expiry date. b) Begin with the Orion turned on and the sample hose removed. - Page 27 You can then fit the wand, test the pump as described in Section 3.3.8: ‘Test the pump’ on page 23, and the Orion will be ready for operation. If the readings are not within these tolerances, the Orion has failed the challenge test. Perform a field calibration. D.I. Rec-ommended Practice...
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Page 28: Field Calibration
S, CO and LEL sensors against the calibration gas. i) When calibration is complete, the Cal flag will disappear and the Orion returns to instant reading mode. Remove the calibration hose and close the regulator on the cylinder. Wait until the readings recover and show clean air. -
Page 29: Clearing Peaks
NOTE Clearing peaks also clears the oxygen minimum reading. Clearing the oxygen minimum also clears the peaks. Turning the Orion off clears both the peaks and O minimum. Peak readings are recorded in the datalog. Clearing peaks does not effect the datalog. -
Page 30: Clearing Stel And Twa
To have meaningful results during operations, TWA and STEL must be cleared. NOTE Turning the Orion off clears TWA and STEL. If you need to record TWA and STEL readings for operational needs, do so before clearing, or before turning the unit off. -
Page 31: Test The Pump
Remove your finger and acknowledge the alarm by pressing Change/Reset. NOTE If you turn on the Orion and then connect the sample hose, the unit may go into pump alarm. This does not constitute a pump test. Acknowledge the alarm and repeat the pump test. -
Page 32: Operations
If you’re comparing readings over time, make sure you always take subsequent readings at exactly the same location as the first reading. The oxygen concentration shown by the Orion can be used as an indication of other contaminants. The O reading is normally about 20.5 to 21%. -
Page 33: Gas Concentration Alarms
If necessary, record peaks, O minimum, TWA and STEL, as these values will be cleared by turning off. b) Turn the Orion off and back on again to reset the alarm. NOTE The Orion does not identify combustible gases. If the gas has been identified, use the correlation factors in A.6: ‘Orion LEL correlation... -
Page 34: Battery Condition And Alarm
Segments within the icon disappear as battery life is used up. Each segment represents 25% of battery life. When 20 minutes of nominal battery life remains, the Orion will alarm and the battery icon will flash. Acknowledge the alarm by pressing Change/Reset. -
Page 35: Datalogging
Changing batteries is not intrinsically safe. Do not change batteries in a combustible atmosphere. If batteries are not changed, the Orion will re-alarm every five minutes. When the batteries can no longer operate the unit, the Orion will go into battery shutdown: •... -
Page 36: Maintenance
‘as required’ maintenance. The Orion is exchanged annually for preventative maintenance and laboratory calibration. This is initiated by MSA. MSA will issue an exchange unit. Instructions for the return of the original unit are included with the exchange unit. MSA issues an Instrument Calibration Report for all Orions in service. -
Page 37: After Use
If any of these conditions is experienced, carry out the following procedure: a) Run the Orion in known clean air for 15 minutes, acknowledging any alarms as they occur. b) Conduct a challenge test to confirm the sensor has returned to normal readings. - Page 38 Battery pack screws c) Lift the base of the pack and gently pull it away from the Orion. d) Turn the pack over. A cover is held in place by a single clasp with an Allen key head. Figure 13 The battery pack...
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Page 39: Changing Filters
Proceed with operational start-up, or wait until warm-up is complete and turn the Orion off. h) Reassemble cover onto battery pack. i) Insert the ridge on the battery pack into the Orion, and push the battery pack into place. Screw the battery pack down. Changing filters Check all filters after use and replace as required. -
Page 40: Internal Water Stop
Replace the filter from the spares provided in the tool kit. Discard the old filter. f) Set the backing plate in place, and screw down. g) Conduct a pump test of the Orion only by holding your finger over the air inlet. The Orion must alarm. -
Page 41: Downloading Data
Four-Head Gas Detector: MSA Orion Downloading data If the Orion is used at an incident where there is a fatality, injury or near miss, the Orion must be quarantined. Do not attempt to download data. Ensure no data is lost. -
Page 42: Resupply
(ESCAT), A.E. Baker, or from local suppliers. See Section 2.4.2: ‘Orion specifications’ on page 9 for battery specifications. Filters and other Orion parts are listed on ESCAT. Contact Gas Help for advice. D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm... -
Page 43: Appendix A Principles Of Gas Detection
Substances Information System (HSIS) database. To work in this environment, this worker must wear respiratory protection. Example 2: Assume the Orion has measured a CO concentration of 15 ppm for 10 minutes and 10 ppm for 5 minutes: (10 mins x 15 ppm) + (5 mins x 10 ppm) -
Page 44: Time Weighted Average
The published TWA for H S is 10 ppm. While the two hour exposure averaged across an eight hour day gives an Orion TWA reading of 4 ppm, the actual exposure is 16 ppm – above the published STEL of 15 ppm for H S. -
Page 45: Oxygen And Toxic Gas Sensors
WARNING For any comparison to work, the combustible gas being measured must first be identified. Otherwise the Orion can only indicate the presence or absence of a combustible gas, and not an accurate concentration. The combustible gas sensor measures the concentration of combustible gases only. -
Page 46: Orion Sensor Configuration
Four-Head Gas Detector: MSA Orion Orion sensor configuration The sensors are located below the pump cap on the upper front body of the Orion. The configuration is as below. Figure 1 Orion sensor configuration Alarm light sensors are located under the... - Page 47 * These gases can inhibit the sensor. To clear this condition, see the procedure in Section 4.2: ‘After use’ on page 29. WARNING Correlation factors can only work if the gas has been identified. If in doubt, always follow the Orion’s 10% LEL alarm. D.I. Recommended Practice Version 02 Issued February 2011 FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Appendix.fm...
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Page 48: Cross Sensitivity
Temperature class To be intrinsically safe in a particular atmosphere, the maximum temperature the surface the Orion can reach must be less than the ignition temperature of the gas or vapour. With alkaline batteries fitted, the Orion is rated for temperature class T4 (including... -
Page 49: Glossary
Gas Help A 24 hour, seven day a week help service for the Orion gas detector (and some other gas detectors). Use the number listed on the Online Phone Book page on the Intranet. Call for advice on using, maintaining, problem solving and ordering spare parts for the Orion 4-head gas detector. - Page 50 Four-Head Gas Detector: MSA Orion Time Weighted Average The average amount of gas (in ppm) a worker can be exposed to over a certain (TWA): time period. This time is defined as 8 hours to represent a normal work day.
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Page 51: References
FRNSW, 2005, Recommended practice: Wearing of uniforms and personal protective equipment (PPE), Version A(01), Fire and Rescue NSW, Sydney. FRNSW, 2007, MSA Orion gas detector: Detector use record, Ver 01, Fire and Rescue NSW Alexandria. Viewed 22 Dec. 2012 [http://its1/ois_portal/content/forms/ Orion%20Assessment%20Form.pdf]... -
Page 52: Index
Four-Head Gas Detector: MSA Orion INDEX combustible gases alarm accuracy correlation factors alarms correlation factors list acknowledging explosive limits LEL and UEL alarm lights toxicity of gas concentrations connecting sample hose oxygen control buttons STEL correlation factors toxic gases combustible gas list... - Page 53 Four-Head Gas Detector: MSA Orion instant reading carbon monoxide rubber boot flowchart hydrogen sulphide sampling wand, assembling wand operations scrolling LCD pages oxygen sensors Instrument Calibration Report accuracy intrinsic safety combustible gases batteries electrochemical response time speaker kit contents specifications...