This document provides a job method statement for testing oxygen concentration in an LPG tank using a Model 3110 Portable Trace Oxygen Analyzer. It outlines the objectives, equipment, manpower, and 14 step process for connecting the analyzer to the LPG tank, regulating pressure and flow, purging the system, taking an oxygen reading, recording results, and disconnecting from the tank. Figures and labels are also provided to identify components of the analyzer.

1. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 1
JOB METHOD STATEMENT
(Model 3110 Portable Trace Oxygen
Analyzer)
Prepared By: Approved By: Reviewed By: Approved By:
Name: Adrian Mah
Designation: Project
Engineer
Company: SIG
Date: 09/05/2016
Name: Richard Chung
Designation: Operations
and Safety Manager
Company: SIG
Date: 09/05/2016
Name:
Designation:
Company:
Date:
Name:
Designation:
Company:
Date:

2. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 2
NO TABLE OF CONTENTS.
1 OBJECTIVE
2 FIGURES AND LABELS
3 JOB METHOD STATEMENT
4 EQUIPMENTS
5 MANPOWER LIST
6 CUSTOMER ACCEPTANCE FORM (SIG)
7 CALIBRATION CERTIFICATE
8 MODEL 3110 PORTABLE TRACE OXYGEN ANALYZER
(CATALOG)

3. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 3
1. OBJECTIVE.
This Job Method Statement details to be followed in order to test for the oxygen
concentration (% or ppm) within the LPG tank (Liquefied Petroleum Gas) after purging.
2. FIGURES AND LABELS.
Figure 2.1: Model 3110 Portable Trace Oxygen Analyzer (Front View with Labels)

4. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 4
Figure 2.2: Model 3110 Portable Trace Oxygen Analyzer (Back View with Labels)

5. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 5
Figure 2.3: Snoop
Label Description
V1 Pressure Regulator Valve
V2 Flowmeter Valve
V3 Purge Valve
V4 Navigation Keys
R1 Inlet Pressure Reading (barg or psig)
R2 Outlet Pressure Reading (barg or psig)
R3 Analyzer Reading
R4 Flowmeter Reading (L/min of AIR)
C1 Connection (1/4” Male Connector)

6. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 6
3. JOB METHOD STATEMENT.
2.1 Application of Permit to Work (PTW).
2.2 Preparation of tools and equipment which included the analyzer and snoop at
site. The measurements and readings of Model 3110 Portable Trace Oxygen
Analyzer consisted of pressure (bar or psi), flowrate (L/min in AIR) and oxygen
concentration (% or ppm).
2.3 The analyzer is turned on by switching on V4 to ensure that the battery is fully
charged beforehand and then switched off.
2.4 The analyzer and the snoop is brought to the pressure vessel and to be prepared
before it tested for oxygen concentration.
2.5 The ¼” Male connector from the LPG tank is then fitted to the analyzer inlet at
C1.
2.6 The valve from LPG tank is slowly opened and throttled to allow the gas to flow
into the analyzer until the pressure inlet shown in R1 is at around 4 to 5 barg.
2.7 The snoop is sprayed onto the valves and fittings of the analyzer to ensure no
gas leaking.
2.8 The outlet pressure is regulated by turning V1 until the pressure reading reached
1 barg as shown in R2.
2.9 Then the flowrate is controlled by turning V2 until the flowmeter reading on R4
reached 2 L/min of AIR.
2.10 The gas is then purged by turning on V3 and closing it, this process is repeated
for 1 minute to ensure all the residual gases is completely purged. After 1 minute,
the V3 is closed and the sample gas is ready to be tested.
2.11 Now the analyzer is turned on by switching on V4. The analyzer waited and
monitored for 3 to 5 minutes until the reading is constant.

7. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 7
2.12 After 3 to 5 minutes, the reading is taken as the final oxygen concentration of the
pressure vessel.
2.13 The reading is recorded into the SIG CUSTOMER ACCEPTANCE FORM and
ready to be evaluated by the customer.
2.14 After the testing, the analyzer is switched off. The valve from the pressure vessel
is closed and the gas is completely discharged outside by opening V3 fully.
2.15 Then the ¼” male connector at C1 can be safely disconnected to conclude the
test.
3. EQUIPMENTS.
3.1 Model 3110 Portable Trace Oxygen Analyzer
3.2 Snoop

8. SOUTHERN INDUSTRIAL GAS SDN BHD
JOB METHOD STATEMENT: OXYGEN ANALYZER
Page 8
4. MANPOWER LIST
4.1 Project Engineer – 1 Person (Adrian Mah Siew Hoe)
5. RECORD & REFERENCE
5.1 CUSTOMER ACCEPTANCE FORM (SIG)
5.2 CALIBRATION CERTIFICATE
5.3 MODEL 3110 PORTABLE TRACE OXYGEN ANALYZER (CATALOG)

11. Model 3110Portable Oxygen Analyzer
Trace/Percent, Intrinsically Safe

12. Model 3110 Portable Oxygen Analyzer
• Air separation and liquefaction
• Pure gaseous hydrocarbon stream monitoring
• Semiconductor manufacturing
• Protective atmosphere blanketing of primary liquid
feedstocks and flammable liquids
• Process analysis of gaseous monomers – vinyl
chloride, propylene, butadiene, isoprene, or ethylene
• Gas purity certification
• Glove box or pipeline leak detection
• Natural gas treatment and transmission
• Catalyst protection
• Inert gas welding of exotic metals
• Wave and reflow soldering
• Heat treating and bright annealing
• Nuclear fuel processing and isotope separation
• Analysis of chemical reactions
• Headspace gas analysis
• Crystal growth
• Plastics manufacturing
APPLICATIONS
GENERAL DESCRIPTION
• Intrinsically safe, FM/FMc or ATEX approved.
• Digital meter readout
• 0-1 VDC output, data logging capabilities
• Ideal for measuring O2 in natural gas and a variety
of other background gases
• Long-life, maintenance-free, Micro-fuel Cell oxygen
sensor
• Universal AC charger
• Real-time data-logging capabilities with digital
output that can be downloaded directly to a PC
• Stainless steel quick disconnect gas fittings
• Sample system consisting of coalescing filter,
needle valve, flow meter, fittings and tubing suitable
for trace/percent O2 analysis
• Insta-trace for fast recovery after installation
• NG option: H2S and sulfur resistant sensor
FEATURES AND BENEFITS
OPTIONS
The Model 3110 represents the new generation
of portable trace and percent oxygen analysis
capability.
The 3110 combines a rugged, portable analyzer
design with the high reliability of Teledyne trace
and percent level sensors. This ensures highly
accurate ppm/percent oxygen readings in a variety
of background gases -- including hydrocarbons. The
batteries supply at least 100 hours of continuous
power to the analyzer, with a low-battery indicator
LED.
The analyzer includes quick-disconnect fittings
to take measurements without hassle and can
be equipped with an external sample system. The
microprocessor-based electronics provide accurate,
high resolution readings and easy-to-use features.
2
Built for Reliability and Performance
Model 3110 comes standard with a
heavy plastic carrying case with foam interior.

13. Model 3110 Portable Oxygen Analyzer
SPECIFICATIONS
3
Ranges: 3110: 0-10 ppm to 0-25% O2
3110XL: 0-2 ppm to 0-25% O2
3110P: 0-1% to 0-25% O2
Response Time: Trace ranges (with B-2C sensor): < 60 seconds or less
Percent ranges (with B-1 sensor): < 7 seconds
Operating Temperature: 32 to 104°F (0 to 40°C)
Reproducibility: ±1% at constant temperature
Sensor Type: Micro-fuel Cell
System Power: NiCad batteries, AC adapter included for battery charging
110/220 VAC 50/60 Hz, 0.25A
Weight: 6 lbs. (2.71 kg)
Approval: Factory Mutual (FM/FMc), intrinsically safe, Class I Div 1 Groups A-D T6
ATEX, intrinsically safe, Ex ia IIC T3
CE marked
Battery: Ni-Cad, >100 hours per charge, 5-year expected life
16830 Chestnut Street
City of Industry, CA 91748, USA
TEL: (626) 934-1500 or (888) 789-8168
FAX: (626) 934-1651
E-MAIL: ask_tai@teledyne.com
www.teledyne-ai.com
Warranty
Instrument is warranted for one year against defects in
material or workmanship
NOTE: Specifications and features will vary with application. The above are estab-
lished and validated during design, but are not to be construed as test criteria for
every product. All specifications and features are subject to change without notice.
Model 3110 is available with an optional sample system
consisting of coalescing filter, SS needle valve, flow meter,
flexible tubing and fittings