MSA ORION User manual

Orion®Multigas
Detector Operation Manual
Detector Multigas Orion®
Manual de operaciones
Détecteur multi-gaz Orion®
Mode d’emploi
In North America, to contact your
nearest stocking location, dial
toll-free 1-800-MSA-2222. To con-
tact MSA International, dial 1-412-
967-3354 or 1-800-MSA-7777.
© MINE SAFETY APPLIANCES
COMPANY 2005 – All Rights
Reserved
En América del Norte para comunicarse con el lugar de abastecimiento más cercano llame sin costo
alguno al 1-800-MSA-2222. Para comunicarse con MSA International, llame al 1-412-967-3354 ó al
1-800-MSA-7777.
© MINE SAFETY APPLIANCES COMPANY 2005 – Se reservan todos los derechos.
Pour contacter le distributeur le plus proche en Amérique du Nord, appeler le numéro gratuit 1-800-
MSA-2222. Pour joindre MSA International, composer le 1-412-967-3354 ou le 1-800-MSA-7777.
© MINE SAFETY APPLIANCES COMPANY 2005 – Tous droits réservés.
Manufactured by
Fabricado por
Fabriqué par
MSA INSTRUMENT DIVISION
P.O. Box 427, Pittsburgh, Pennsylvania 15230
USA, EE.UU., Etats-Unis
(L) Rev 710021555

Orion®
Multigas Detector
Operating Manual
In North America, to contact your nearest stocking location, dial toll-free 1-800-MSA-2222. To contact
MSA International, dial 1-412-967-3354 or 1-800-MSA-7777.
© MINE SAFETY APPLIANCES COMPANY 2005 - All Rights Reserved
Manufactured by
MSA INSTRUMENT DIVISION
P.O. Box 427, Pittsburgh, Pennsylvania 15230
(L)Rev 7 10021555

º
WARNING
THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO
HAVE OR WILL HAVE THE RESPONSIBILITY FOR USING OR SERVICING THE
PRODUCT. Like any piece of complex equipment, this instrument will perform
as designed only if it is used and serviced in accordance with the
manufacturer’s instructions. OTHERWISE IT COULD FAIL TO PERFORM AS
DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT FOR THEIR
SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR DEATH.
The warranties made by Mine Safety Appliances Company with respect to the product are voided if
the product is not used and serviced in accordance with the instructions in this manual. Please
protect yourself and others by following them. We encourage our customers to write or call
regarding this equipment prior to use or for any additional information relative to use or repairs.
º
CAUTION
For safety reasons, this equipment must be operated by qualified personnel only. Read and
understand the instruction manual completely before operating.

Table of Contents
Chapter 1
Instrument Safety and Certifications . . . . . . . . . . . . . . . . . . . . 1-1
"WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Safety Limitations and Precautions . . . . . . . . . . . . . . . . . . . . . 1-2
Date of Instrument Manufacture . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Electronic Interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Instruments with Pumps or Aspirator Assemblies . . . . . . . . . . 1-4
Chapter 2
Quick Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Figure 2-1. Understanding the Display . . . . . . . . . . . 2-1
Turning ON the Orion Multigas Detector . . . . . . . . . . . . . . . . . 2-2
Figure 2-2. Flow Diagram . . . . . . . . . . . . . . . . . . . . . . 2-2
Moving Through the Orion Multigas Detector Pages . . . . . . . 2-3
Figure 2-3. Orion Buttons . . . . . . . . . . . . . . . . . . . . . . 2-3
Turning OFF the Orion Multigas Detector . . . . . . . . . . . . . . . . 2-4
Chapter 3
Using the Orion Multigas Detector. . . . . . . . . . . . . . . . . . . . . . 3-1
Turning ON the Orion Multigas Detector . . . . . . . . . . . . . . . . . 3-1
Installing the Battery Pack (FIGURE 3-1) . . . . . . . . . . . . . . 3-1
Figure 3-1. Battery Pack Installation . . . . . . . . . . . . . 3-1
"WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Fresh Air Set Up Option . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
"WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Heartbeat Indicator (see FIGURE 3-2) . . . . . . . . . . . . . . . . 3-3
Battery Life Indicator (see FIGURE 3-2) . . . . . . . . . . . . . . . 3-3
Battery Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-2. Battery and Heartbeat Indicators . . . . . . 3-3
Operating Manual Table of Contents
TOC-1

º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
º
CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Verifying Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Figure 3-3. Pump Alarm on the Display . . . . . . . . . . 3-6
To Clear an Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Calibration Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Diffusion Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Figure 3-4. Instrument with Calibration Cap
Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Pumped Instrument (FIGURE 3-5) . . . . . . . . . . . . . . . . . . . . 3-8
Figure 3-5. Pumped Instrument with Calibration
Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Measuring Gas Concentrations. . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Combustible gases (% LEL) (FIGURE 3-6) . . . . . . . . . . . . 3-9
Figure 3-6. Instrument in LEL Alarm . . . . . . . . . . . . . 3-9
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Oxygen Measurements (% O2) (FIGURE 3-7). . . . . . . . . . 3-10
Figure 3-7. Instrument in Oxygen Alarm . . . . . . . . . 3-10
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Toxic Gas Measurements (FIGURE 3-8) . . . . . . . . . . . . . . 3-11
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Figure 3-8. Instrument in Toxic Gas Alarm . . . . . . . 3-11
Viewing Optional Displays (see FIGURE 3-9) . . . . . . . . . . . . 3-12
Figure 3-9. Flow Diagram . . . . . . . . . . . . . . . . . . . . . 3-12
Peak Readings (PEAK) (FIGURE 3-10) . . . . . . . . . . . . . . . 3-13
Minimum Readings (MIN) (FIGURE 3-11) . . . . . . . . . . . . . 3-13
Figure 3-10. PEAK Readings on the Display . . . . . 3-13
Figure 3-11. MIN Reading on Display . . . . . . . . . . . 3-13
Short Term Exposure Limits (STEL) (FIGURE 3-12). . . . . 3-14
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TOC-2

Figure 3-12. Exposure Page with STEL Alarm . . . . 3-14
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Time Weighted Average (TWA) (FIGURE 3-13) . . . . . . . . 3-15
Figure 3-13. Exposure Page with TWA Alarm . . . . 3-15
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Time Display (FIGURE 3-14) . . . . . . . . . . . . . . . . . . . . . . . 3-17
Date Display (FIGURE 3-15). . . . . . . . . . . . . . . . . . . . . . . . 3-17
Figure 3-14. Time Display . . . . . . . . . . . . . . . . . . . . 3-17
Figure 3-15. Date Display . . . . . . . . . . . . . . . . . . . . . 3-17
Turning OFF the Orion Multigas Detector . . . . . . . . . . . . . . . 3-18
Chapter 4
Setting up the Multigas Detector . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Power Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Table 4-1. Approximate Battery Run Times (20oC) . . 4-1
Table 4-2. Capacity Reductions Expected for
Batteries at Colder Temperatures . . . . . . . . 4-1
Battery Pack Removal (FIGURE 4-1). . . . . . . . . . . . . . . . . . 4-1
Battery Charging (NiMH Battery Pack Only) . . . . . . . . . . . . 4-2
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
To Charge the Battery Pack (A.C. Charger
10020551). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Figure 4-1. Removing the Battery . . . . . . . . . . . . . . . 4-2
To Charge the Battery Pack (Vehicle Charger
10026502). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Alkaline Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Table 4-3. Batteries Approved for use in the Orion
Alkaline Battery Pack. . . . . . . . . . . . . . . . . . 4-4
To Replace the Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Changing Instrument Settings. . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Table 4-4. Available Instrument Selections and
Methods for Changing Selections . . . . . . . . 4-5
Changing Time and Date (Datalog Equipped Instruments
Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Operating Manual Table of Contents
TOC-3

To Change the Time of Day:. . . . . . . . . . . . . . . . . . . . . . . 4-5
To Change the Date: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Accessing the Instrument Setup Mode (FIGURES 4-2 and
4-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
To Access the Instrument Set-up Mode:. . . . . . . . . . . . . . 4-6
Figure 4-2. Instrument Setup Mode (part 1 of 2) . . . . 4-7
Figure 4-3. Instrument Setup Mode (part 2 of 2) . . . . 4-8
When in the Set-up Mode, the Following Options
Appear: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Chapter 5
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Calibrating the Orion Multigas Detector . . . . . . . . . . . . . . . . . . 5-1
Table 5-1. Autocalibration and Required Calibration
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
To Calibrate the Orion Multigas Detector (FIGURE 5-1): . . 5-1
Figure 5-1. Calibration Flow Chart . . . . . . . . . . . . . . . 5-2
Figure 5-2. Zero Flag . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Figure 5-3. CAL Flag . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Autocalibration Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Figure 5-4. Typical Calibration Setup - for Diffusion
with Cal Cap . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Figure 5-5. Typical Calibration Setup - for Pumped
Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Accessing the Expanded Tolerance Calibration . . . . . . . 5-6
Chapter 6
Warranty, Maintenance and Troubleshooting. . . . . . . . . . . . . . . . 6-1
MSA Portable Instrument Warranty. . . . . . . . . . . . . . . . . . . . . . 6-1
Cleaning and Periodic Checks . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Cleaning and Routine Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Table of Contents Operating Manual
TOC-4

º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Checking The Pump Inlet Filter . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Replacing the Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Dust Filter (see FIGURE 8-2 and TABLE 8-2). . . . . . . . 6-4
Water Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Internal "Firewall" Filter (see FIGURES 8-1 and 8-2
and TABLE 8-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Probe Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-1. Replacing the Probe Filter . . . . . . . . . . . 6-6
Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Table 6-1. Troubleshooting Guidelines . . . . . . . . . . . . 6-8
Repair Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Battery Pack Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Remove the Battery Pack . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Replace the Battery Pack . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Main Electronics Board Replacement. . . . . . . . . . . . . . . . . 6-10
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Display Assembly Replacement . . . . . . . . . . . . . . . . . . . . . 6-12
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
º
CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
º
WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Horn Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . 6-14
Operating Manual Table of Contents
TOC-5

Pump Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
º
CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
º
CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
º
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Chapter 7
Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Table 7-1. Certifications . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Table 7-2. Instrument Specifications . . . . . . . . . . . . . . 7-2
Table 7-3. COMBUSTIBLE GAS - Typical
Performance Specifications. . . . . . . . . . . . . . 7-3
Table 7-4. COMBUSTIBLE GAS - Cross Reference
Factors for Orion General-Purpose
Calibration Using Calibration Cylinder
(P/N 478191), (P/N 478192), (P/N
804769), or (P/N 804770) Set to 58% LEL. 7-3
Environment and Oxygen Sensor Readings . . . . . . . . . . 7-4
Pressure Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Humidity Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Temperature Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Table 7-5. OXYGEN - Typical Performance
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Table 7-6. CARBON MONOXIDE (appropriate
models only) - Typical Performance
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Table 7-7. CARBON MONOXIDE - Cross
Reference Factors for Orion Calibration
Using Calibration Cylinder (P/N 478191)
or (P/N 804770) . . . . . . . . . . . . . . . . . . . . . . 7-5
Table 7-8. HYDROGEN SULFIDE (appropriate
models only) - Typical Performance
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Table 7-9. HYDROGEN SULFIDE - Cross
Reference Factors for Orion Calibration
Using Calibration Cylinder (P/N 804769)
or (P/N 804770) Set to 10 ppm H2S. . . . . . 7-6
Table of Contents Operating Manual
TOC-6

Chapter 8
Replacement and Accessory Parts . . . . . . . . . . . . . . . . . . . . . . . 8-1
Table 8-1. Accessory Parts List . . . . . . . . . . . . . . . . . 8-1
Table 8-2. Replacement Parts List . . . . . . . . . . . . . . . 8-2
Figure 8-1. Replacement Parts (see Table 8-2) . . . . 8-3
Figure 8-2. Replacement Parts (see Table 8-2) . . . . 8-4
Operating Manual Table of Contents
TOC-7

Chapter 1
Instrument Safety and
Certifications
The Orion®Multigas Detector is for use by trained and qualified
personnel. It is designed to be used when performing a hazard
assessment to:
•Assess potential worker exposure to combustible and toxic
gases and vapors
•Determine the appropriate gas and vapor monitoring needed for
a workplace.
The Orion Multigas Detector can be equipped to detect:
•Combustible gases and certain combustible vapors
•Oxygen-deficient or oxygen-rich atmospheres
•Specific toxic gases for which a sensor is installed.
º
WARNING
•Read and follow all instructions carefully.
•Check calibration before each day’s use and adjust if
necessary.
•Check calibration more frequently if exposed to silicone,
silicates, lead-containing compounds, hydrogen sulfide, or
high contaminant levels.
•Recheck calibration if unit is subjected to physical shock.
•Check pump (if used) for proper operation before each
days use.
•Use only to detect gases/vapors for which a sensor is
installed.
•Do not use to detect combustible dusts or mists.
•Make sure adequate oxygen is present.
•Do not block sensors.
•Do not place end of sampling line in liquids.
•Wait for accurate reading; response times vary, based on
gas/vapor and length of sampling line.
Operating Manual Chapter 1, Safety Limitations and Certifications
1-1

•Have a trained and qualified person interpret
instrument readings.
•Do not replace alkaline cells in a combustible atmosphere.
•Do not recharge NiMH battery packs in a combustible
atmosphere.
•Do not alter or modify instrument.
INCORRECT USE CAN CAUSE SERIOUS PERSONAL INJURY
OR DEATH.
Safety Limitations and Precautions
Carefully review the following safety limitations and precautions
before placing this instrument in service:
•The Orion Multigas Detector is designed to:
•Detect gases and vapors in air only
•Detect only specified toxic gases for which a sensor
is installed.
•Perform the following checks before each day’s use to verify
proper instrument operation:
•Calibration check (see Calibration Check section). Adjust
calibration if the readings are not within the specified limits.
•Check pump (if used) for proper operation
(see "Verifying Pump Operation" section). Have pump
serviced if necessary.
•Check calibration more frequently if the unit is subjected to
physical shock or high levels of contaminants. Also, check
calibration more frequently if the tested atmosphere contains
the following materials, which may desensitize the combustible
gas sensor and reduce its readings:
•Organic silicones
•Silicates
•Lead-containing compounds
•Hydrogen sulfide exposures over 200 ppm or exposures
over 50 ppm for one minute.
•The minimum concentration of a combustible gas in air that can
ignite is defined as the Lower Explosive Limit (LEL). A
combustible gas reading of "100" indicates the atmosphere is
Chapter 1, Safety Limitations and Certifications Operating Manual
1-2

above 100% LEL and an explosion hazard exists. In such
cases, the instrument LockAlarm feature activates. Move away
from contaminated area immediately.
•Do not use the Orion Multigas Detector to test for combustible
or toxic gases in the following atmospheres as this may result in
erroneous readings:
•Oxygen-deficient or oxygen-rich atmospheres
•Reducing atmospheres
•Furnace stacks
•Inert environments
•Atmospheres containing combustible airborne mists
or dusts.
•Do not use the Orion Multigas Detector to test for combustible
gases in atmospheres containing vapors from liquids with a
high flash point (above 100OF) as this may result in erroneously
low readings.
•Do not block sensor openings as this may cause inaccurate
readings. Do not press on the face of the sensors, as this may
damage them and cause erroneous readings. Do not use
compressed air to clean the sensor holes, as the pressure may
damage the sensors.
•Allow sufficient time for unit to display accurate reading.
Response times vary based on the type of sensor being utilized
(see "Performance Specifications" section of manual).
Additionally, when using a sampling pump, allow a minimum of
0.7 seconds per foot of sample line to allow the sample to be
drawn through to the sensors.
•Keep the probe tip above liquid surfaces; otherwise, liquid may
enter the system and block the sample flow, causing inaccurate
readings and/or internal damage.
•All instrument readings and information must be interpreted by
someone trained and qualified in interpreting instrument
readings in relation to the specific environment, industrial
practice and exposure limitations.
•Replace alkaline cells or recharge NiMH battery-pack in
non-hazardous area only. Use only battery chargers listed in
this manual; other chargers may damage the battery pack and
the unit. Dispose of batteries in accordance with local health
and safety regulations.
Operating Manual Chapter 1, Safety Limitations and Certifications
1-3

•Do not alter this instrument or make any repairs beyond those
specified in this manual. Only MSA-authorized personnel may
repair this unit; otherwise, damage may result.
Date of Instrument Manufacture
The date of manufacture of your Orion Multigas Detector is coded
into the instrument serial number.
•The last three digits represent the month (the letter)
and the year (the two-digit number).
•The letter corresponds to the month starting with
A for January, B for February, etc.
Certifications
Tests completed by MSA verify that the Orion Multigas Detector
meets applicable industry and government standards as of the
date of manufacture.
Electronic Interference
•This instrument generates, uses, and can radiate radio
frequency energy. Operation of this instrument may cause
interference, in which case, the user may be required to correct.
•This device is test equipment and is not subject to FCC
technical regulations. However, it has been tested and found to
comply with the limits for a Class A digital device specified in
Part 15 of the FCC regulations.
•This digital apparatus does not exceed the Class A limits for
radio noise emissions from digital apparatus set out in the
Radio Interference Regulations of the CRTC.
•There is no guarantee that interference will not occur. If this
instrument is determined to cause interference to radio or
television reception, try the following corrective measures:
•Reorient or relocate the receiving antenna
•Increase separation between the instrument and the
radio/TV receiver
•Consult an experienced radio/TV technician for help.
Chapter 1, Safety Limitations and Certifications Operating Manual
1-4

Instruments with Pumps or Aspirator
Assemblies
If using an Orion instrument with a sampling pump or aspirator
bulb assembly, perform a blocked flow test before each day’s
use. When performing the test, the appropriate indication must
occur when blocking the flow. If the indication does not occur,
check the instrument flow system for leaks.
Once the leak condition is corrected, perform the blocked flow
test again to verify proper operation before using the instrument.
Refer to the applicable section in this instruction manual for
additional information.
º
WARNING
Perform a blocked flow test before each day’s use. Failure
to perform a blocked flow test can result in the user being
unaware of the presence of gas.
Donotusetheinstrumentunlesstheblockedflowindications
occur when performing the blocked flow test. Lack of a
blocked flow indication is a sign that a leak exists and the
sample may not be drawn to the sensors, which could cause
a false reading.
Failure to follow the above can result in serious personal
injury or death.
Instruments with Pumps and Electronic Flow
Indicators
With the pump running, block the sample line inlet or probe inlet.
•The blocked flow flag on the display must illuminate and an
audible alarm must sound.
Instruments with Aspirator Bulbs
With the aspirator bulb squeezed, block the sample inlet or probe
inlet.
•The bulb must not inflate.
•Please note that some instruments with electronic flow
indicators can have optional aspirator bulb accessories.
Operating Manual Chapter 1, Safety Limitations and Certifications
1-5

•The electronic flow indicators are not intended to activate when
the aspirator is attached.
If there are questions regarding this information, please contact
MSA Customer Service at:
•1-800-MSA-2222
Chapter 1, Safety Limitations and Certifications Operating Manual
1-6

Chapter 2
Quick Start
It is your responsibility to know how to use the Orion Multigas
Detector. When used properly, the Orion Multigas Detector will
alert you to the presence of combustible gases and vapors and
to atmospheres that are rich or deficient in oxygen. It will also
alert you to the presence of carbon monoxide and hydrogen
sulfide, if it is equipped with sensors for those gases. These
conditions are displayed clearly and simultaneously on the face of
the instrument. See FIGURE 2-1 for an explanation of the flags,
numbers and button operation of the Orion Multigas Detector.
Figure 2-1. Understanding the Display
Operating Manual Chapter 2, Quick Start
2-1

Turning ON the Orion Multigas
Detector
To turn ON the Orion Multigas Detector:
•Install the battery pack or
•If the battery pack is already installed, push the
ON-OFF/PAGE button.
Figure 2-2. Flow Diagram
Chapter 2, Quick Start Operating Manual
2-2

The instrument then performs a Self-test where the:
•display check occurs
(every segment on the display momentarily illuminates)
•audible alarm sounds
•alarm lights illuminate
•display backlight illuminates.
Once the Self-test is complete, the instrument enters the Measure
mode and is ready for use.
Moving Through the Orion Multigas
Detector Pages
FIGURE 2-2 is a flow diagram showing the operation of the
instrument. Note that the STEL, TWA, TIME and DATE pages
will appear only if the Orion Multigas Detector is equipped with
the optional datalogging package. To access instrument features
and informational pages:
•Push the ON-OFF/PAGE button (FIGURE 2-3).
The Pages appear in the following order:
•Peak
Shows peak value recorded since last instrument turn-ON
•Min
Shows minimum value recorded since last instrument turn-ON
for the oxygen sensor only
•STEL (Datalogging instrument only)
Shows Short Term Exposure Limit for installed toxic gas sensors
Figure 2-3. Orion Buttons
Operating Manual Chapter 2, Quick Start
2-3

•TWA (Datalogging instrument only)
Shows Time Weighted Average for installed toxic gas sensors
•Time (Datalogging instrument only)
Shows time of day in a 24-hour format
•Date (Datalogging instrument only)
Shows current date in a Month/Day/Year format.
To return instrument to the Measure page:
•Push the ON-OFF/PAGE button again
•The instrument will automatically return to the Measure page
after a delay of 30 seconds on any page.
Turning OFF the Orion Multigas
Detector
To turn OFF the Orion Multigas Detector:
•Push and hold the ON-OFF/PAGE button for five seconds.
•Hourglass displays to indicate instrument turn-OFF.
Chapter 2, Quick Start Operating Manual
2-4