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OPERATING INSTRUCTIONS FOR
Model 3110
Portable Trace & Percent
Oxygen Analyzer
P/N M82155
12/05/11
DANGER
Toxic gases and or flammable liquids may be present in this monitoring system.
Personal protective equipment may be required when servicing this instrument.
Hazardous voltages exist on certain components internally which may persist
for a time even after the power is turned off and disconnected.
Only authorized personnel should conduct maintenance and/or servicing.
Before conducting any maintenance or servicing, consult with authorized
supervisor/manager.
Teledyne Analytical Instruments
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Model 3110
Copyright © 2011 Teledyne Instruments/ Analytical Instruments
All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed,
stored in a retrieval system, or translated into any other language or computer language in
whole or in part, in any form or by any means, whether it be electronic, mechanical,
magnetic, optical, manual, or otherwise, without the prior written consent of Teledyne
Instruments/Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-
1580.
Warranty
This equipment is sold subject to the mutual agreement that it is warranted by us free from
defects of material and of construction, and that our liability shall be limited to replacing or
repairing at our factory (without charge, except for transportation), or at customer plant at
our option, any material or construction in which defects become apparent within one year
from the date of shipment, except in cases where quotations or acknowledgements provide
for a shorter period. Components manufactured by others bear the warranty of their
manufacturer. This warranty does not cover defects caused by wear, accident, misuse,
neglect or repairs other than those performed by TI/AI or an authorized service center. We
assume no liability for direct or indirect damages of any kind and the purchaser by the
acceptance of the equipment will assume all liability for any damage which may result from
its use or misuse.
We reserve the right to employ any suitable material in the manufacture of our apparatus,
and to make any alterations in the dimensions, shape or weight of any parts, in so far as
such alterations do not adversely affect our warranty.
Important Notice
This instrument provides measurement readings to its use r, an d serves as a tool b y whic h
valuable data can be gathered. The information provided by the instrument may assist the user
in eliminating potential hazards caused by his process; however, it is essential that all
personnel involved in the use of the instrument or its interface, with the process being
measured, be properly trained in the process itself, as well as all instrumentation related to it.
The safety of personnel is ultimately the responsibility of those who control process
conditions. While this instrument may be able to provide early warning of imminent
danger, it has no control over process conditions, and it can be misused. In particular, any
alarm or control systems installed must be tested and understood, both as to how they
operate and as to how they can be defeated. Any safeguards required such as locks, labels,
or redundancy, must be provided by the user or specifically requested of TI/AI at the time
the order is placed.
Therefore, the purchaser must be aware of the hazardous process conditions. The purchaser
is responsible for the training of personnel, for providing hazard warning methods and
instrumentation per the appropriate standards, and for ensuring that hazard warning devices
and instrumentation are maintained and operated properly.
Teledyne Instruments/ Analytical Instruments, the manufacturer of this instrument, cannot
accept responsibility for conditions beyond its knowledge and control. No statement
expressed or implied by this document or any information disseminated by the
manufacturer or its agents, is to be construed as a warranty of adequate safety control under
the user’s process conditions.
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Portable Trace Oxygen Analyzer
Safety Messages
Your safety and the safety of others is very important. We have
provided many important safety messages in this manual. Please read
these messages carefully.
A safety message alerts you to potential hazards that could hurt you
or others. Each safety message is associated with a safety alert symbol.
These symbols are found in the manual and inside the instrument. The
definition of these symbols is described below:
No
Symbol
GENERAL
WARNING/CAUTION: Refer to the instructions
for details on the specific danger. These cautions warn of
specific procedures which if not followed could cause bodily
Injury and/or damage the instrument.
CAUTION: HOT SURFACE WARNING: This warning is
specific to heated components within the instrument. Failure
to heed the warning could result in serious burns to skin and
underlying tissue.
WARNING: ELECTRICAL SHOCK HAZARD: Dangerous
voltages appear within this instrument. This warning is
specific to an electrical hazard existing at or nearby the
component or procedure under discussion. Failure to heed this
warning could result in injury and/or death from
electrocution.
Technician Symbol: All operations marked with this symbol
are to be performed by qualified maintenance personnel only.
NOTE: Additional information and comments regarding a
specific component or procedure are highlighted in the form
of a note.
CAUTION: THE ANALYZER SHOULD ONLY BE USED FOR THE
PURPOSE AND IN THE MANNER DESCRIBED IN
THIS MANUAL.
IF YOU USE THE ANALYZER IN A MANNER OTHER
THAN THAT FOR WHICH IT WAS INTENDED,
UNPREDICTABLE BEHAVIOR COULD RESULT
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Model 3110
POSSIBLY ACCOMPANIED WITH HAZARDOUS
CONSEQUENCES.
This manual provides information designed to guide you through
the installation, calibration operation and maintenance of your new
analyzer. Please read this manual and keep it available.
Occasionally, some instruments are customized for a particular
application or features and/or options added per customer requests.
Please check the front of this manual for any additional information in
the form of an Addendum which discusses specific information,
procedures, cautions and warnings that may be peculiar to your
instrument.
Manuals do get lost. Additional manuals can be obtained from TAI
at the address given in the Appendix. Some of our manuals are available
in electronic form via the internet. Please visit our website at:
www.teledyne-ai.com.
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Portable Trace Oxygen Analyzer
Table of Contents
List of Figures .............................................................................. vii
Introduction ................................................................................... 1
1.1 Introduction 1
1.2 Features 2
1.3 Method of Analysis 3
1.4 Micro-Fuel Cell 4
1.4.1 Cell Warranty 4
1.5 Accuracy and Response 5
1.6 Signal Output 5
1.7 Compact Packaging 5
Installation ..................................................................................... 7
2.1 Charging the Batteries 7
2.2 Gas Connections 8
2.3 Sensor Installation 10
2.3.1 Installing a Percent Sensor 10
2.3.2 Installing a Trace Sensor 10
2.4 Calibration 11
2.4.1 Calibration Using Air for Percent Analysis 11
2.4.2 Calibration Procedure for Trace Analysis 12
2.4.3 Bleeding the Regulator and Purging the Gas Line 12
2.5 Set the Sample Flowrate 13
2.6 External Signal 13
Operation ..................................................................................... 15
3.1 Front Panel Interface 15
3.1.1 ENTER Key 15
3.1.2 ESCAPE Key 16
3.1.3 UP/DOWN Keys 16
3.2 Operation and Setup Screens and Menus 16
3.2.1 POWER ON Screen 17
3.2.2 HOME Screen 18
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Model 3110
3.2.3 DATE Screen 18
3.2.4 TIME Screen 19
3.2.5 AO Rng Screen 19
3.2.6 SPAN VALUE Screen 20
3.2.7 SPAN Screen 21
3.2.8 Filter Screen 22
3.2.9 LOG INTV Screen (Optional) 22
3.2.10 LOG RESET & START Screen (Optional) 23
3.2.11 LOG TRANSMIT Screen 24
3.2.12 POWER DOWN Screen 25
Maintenance & Troubleshooting ................................................ 27
4.1 Routine Maintenance 27
4.2 Opening the Instrument Case 27
4.3 Replacing the Battery 27
4.4 Battery Power Supply Service 28
4.5 Cell Replacement 29
4.6 Cell Warranty 30
4.7 Temperature Compensation 31
4.8 Leak Testing 31
Appendix ...................................................................................... 35
A.1 Specifications 35
A.2 Spare Parts List 36
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Portable Trace Oxygen Analyzer
List of Figures
Figure 1-1: Model 3110 Portable Trace Oxygen Analyzer ............... 2
Figure 2-1: Model 3110 Rear Panel ................................................ 8
Figure 3-1: Front Panel Keys ......................................................... 16
Figure 3-2: Available Menus and Their Sequence ......................... 17
Figure 4-1: Battery Charger Port on the Model 3110 ..................... 29
Figure 4-2: Effects of CO2 on B-2 Cell Life ................................... 33
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Model 3110
DANGER
COMBUSTIBLE GAS USAGE
This instrument is approved as an intrinsically safe gas
analyzer for use in a Division 1 Group A-D hazardous area.
Note that this approval does not apply to the non-conductive
LCD window and micro-fuel cell. Also, although the analyzer
is capable of being ranged up to 25% oxygen, the approval
does not apply to oxygen exposure above 20.9%. This
approval applies only to the equipment specified and
installed in accordance with the information contained within
this manual. It is the customer's responsibility to ensure
safety especially when combustible gases are being
analyzed since the potential of gas leaks always exist.
WARNING
The customer should ensure that the principles of operating
this equipment are well understood by the user. Misuse of
this product in any manner, tampering with its components,
or unauthorized substitution of any component may
adversely affect the safety of this instrument.
Since the use of this instrument is beyond the control of
Teledyne Analytical Instruments, referred as TAI, no
responsibility by TAI, its affiliates, and agents for damage or
injury from misuse or neglect of this equipment is implied or
assumed.
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Portable Trace Oxygen Analyzer Introduction
Introduction
1.1 Introduction
The Teledyne Analytical Instruments (TAI) Model 3110 Portable
Oxygen Analyzer is a portable, intrinsically safe oxygen analyzer
capable of analyzing oxygen levels from 0-10 parts per million (ppm)
oxygen to 25% oxygen (dependent on configuration). These units are
rated as intrinsically safe and may be used in a Class I, Div 1, Group AD hazardous environment. The instrument operates from internal
rechargeable batteries and is supplied with a universal AC charge
adapter. It features quick-disconnect fittings for sample connections and
a rugged, lightweight housing with handle. This versatile instrument can
be brought to the sample site and set up for analysis quickly and easily.
Because of the intrinsically safe design, the instrument can be employed
even in hazardous environments without compromise once calibrated.
The Model 3110 incorporates a large standard feature list designed for
versatile, accurate oxygen analysis for a wide range of applications.
Figure 1-1 shows the standard Model 3110 Portable Trace Oxygen
Analyzer.
The microprocessor based Model 3110 instrument provides one
user settable analysis range in both trace and percent sensitivities. The
range can be set from 0-10 ppm to 25% oxygen with lower ranges or
percent sensitivity models available.
Sample oxygen is displayed on a 2-line 20 character alphanumeric
LCD display mounted on the front panel. Four buttons are used to
interface with the instrument and access all of the analyzer features.
Sample gas is introduced and vented via a pair of quick-disconnect
fittings that feature integral shutoff valves which automatically close
when the mating male fitting is withdrawn. The fittings are an integral
part of the measuring cell manifold so that internal sample passage
volume is at an absolute minimum.
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Introduction Model 3110
j
r
Alphanumeric
LCD
User Interface
Buttons
Contrast
ustment
Ad
Low Battery
Indicato
Battery
Charging
Indicator
Figure 1-1: Model 3110 Portable Trace Oxygen Analyzer
1.2 Features
This instrument is designed to be versatile analytical instrument
and to perform reliably and accurately in analyzing oxygen
concentrations in gas mixtures from ppm levels through 25% oxygen.
The following features are standard on the Model 3110:
Display: A 2-line 20 character alphanumeric LCD
on the front panel displays data and
operational information through various
screens. The contrast is adjustable for
various lighting conditions.
Four-Button User Interface: Operation is performed using the
four front panel mounted buttons. These
buttons are used to enter data, select items
and move through operational screens that
appear on the display.
Universal AC Charge Adapter: The batteries can be recharged
without removing them from the
instrument. The charger operates over the
range of 100-240 VAC.
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Portable Trace Oxygen Analyzer Introduction
LEDs: Two front panel-mounted LEDs are used
to indicate low battery condition and when
the battery is recharging.
Contrast Control: This feature allows the user to easily
adjust the contrast of the display for
optimum viewing under different lighting
conditions. The adjustment is made using
a front panel control dial.
Percent of Range Voltage Output: A 0-1 VDC output is
available that represents the percentage of
the current analysis range.
Data Logger: The optional built-in data logging feature
allows the user to specify the time interval
between data recording sets. The date,
time, and oxygen concentration readings
are stored in internal RAM at the user
specified interval. The data set can be
downloaded using the instrument’s 9-pin
serial interface.
Real-time Clock: This feature allows the Model 3110 to date
and time stamp the data set recorded on
the data logger. It uses a 24 hour clock.
Quick Disconnect Fittings: Dual self-sealing quick disconnect
fittings are installed for easy sample
connections.
1.3 Method of Analysis
The sample oxygen is measured by a unique electrochemical
transducer which functions as a fuel cell; in this instance, the fuel is
oxygen. Oxygen diffusing into the cell reacts chemically to produce an
electrical current that is proportional to the oxygen concentration in the
gas phase immediately adjacent to the transducer’s sensing surface. The
linear, but minute signal produced by the transducer from trace oxygen
is amplified by a two-stage amplifier. Sensor output signal is digitized
and fed to the microprocessor. Additional signal conditioning and
temperature compensation are handled electronically and appropriate
signals are directed to the display and output ports.
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Introduction Model 3110
1.4 Micro-Fuel Cell
The micro-fuel cell (U.S. Pat. Nos. 3,767,552 and 3,668,101) is a
sealed electrochemical transducer with no electrolyte to change or
electrodes to clean. When the cell reaches the end of its useful life, it is
thrown away and replaced. The life of the cell is warranted by TAI (see
below).
The cell is specific for oxygen and is not sensitive to flowrate or
reducing agents such as hydrocarbons, carbon monoxide, sulfur dioxide,
etc. In the absence of oxygen, no current is produced; thus, no zeroing is
required.
1.4.1 Cell Warranty
The Class B1, B2-C, A2C, B2C-XL, Insta-trace and NG series
micro-fuel cells used in the Model 3110 carry a six (6) month warranty.
With regard to spare cells, service time starts when the cell is
removed from its shipping package. You should stock only one spare
cell per instrument at a time.
If a cell was working satisfactorily but ceases to function before the
warranty period expires, you will receive credit on a pro-rated basis
toward the purchase of a new cell.
If you have a warranty claim, return the cell in question to the
factory for evaluation. If it is determined that failure is due to faulty
workmanship or material, the cell will be replaced at no cost to you.
WARNING: EVIDENCE OF DAMAGE DUE TO TAMPERING OR
MISHANDLING WILL RENDER THE CELL
WARRANTY NULL AND VOID.
The Model 3110 is rated as intrinsically safe and may be used in a
Class I, Div 1, Group A-D hazardous environments.
This safety feature does not apply when the instrument is being
charged with the 100- 240 VAC external charge adapter. The instrument
should be removed from hazardous areas when the batteries are being
charged.
Note: Do not use the analyzer when the battery level is low.
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Portable Trace Oxygen Analyzer Introduction
1.5 Accuracy and Response
The Model 3110 provides monitoring accuracies of ±2% of full
scale or ±1 ppm, whichever is greater, at constant temperature.
With a sample flowrate of 1 SCFH, a 90% response can be
achieved in 10 seconds when analyzing in the percent range. At the trace
levels (ppm analysis), a 90% response can be realized in 60 seconds or
less. The response time on the 3110 is limited by the filter setting.
1.6 Signal Output
This analyzer includes a 0-1 VDC output as standard. This signal is
suitable for driving external devices that have an input impedance of
10,000 or more. The signal output is available from a port on the rear
panel.
1.7 Compact Packaging
The instrument is housed in 6 1/8" × 9 1/2" × 5 5/8" (156 × 241 ×
143mm) aluminum case that is equipped with a carrying handle and foot
pads.
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Introduction Model 3110
BLANK PAGE
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Portable Oxygen Analyzer Installation
Installation
The Model 3110 Trace/Percent Oxygen Analyzer is designed to be
portable and easy to setup and configure. To setup the analyzer:
Read the manual
Charge the batteries
Install the sample and vent gas lines
Install the trace sensor and purge the analyzer
Install the percent sensor (no purging required)
Set the sample gas flowrate
Calibrate the analyzer
2.1 Charging the Batteries
The unit is powered by two intrinsically safe rated sub-C Ni-Cd
batteries and is shipped with batteries fully charged. The batteries,
however, will require periodic recharging. For recharging, access to an
AC power source of 100 to 240 volt, 50/60 Hz will be required. The
instrument should not be recharged in a hazardous area. Connect the
universal AC charger adapter supplied with the instrument to the AC
power outlet. Plug the other end of the charger into the port on the rear
panel as shown in Figure 2-1. The green charge indicator LED should be
illuminated to indicate that the unit is charging.
To fully recharge a set of batteries will take approxim ately 16
hours. The instrument should not be left on the charger for longer than
20 hours nor should the charger be left attached to the instrument when
the unit is not charging. The Model 3110 cannot be operated while the
battery charger is attached.
CAUTION: DO NOT CHARGE THE BATTERY IN A HAZARDOUS
AREA. THE INTRINSICALLY SAFE CLASSIFICATION
OF THIS INSTRUMENT DOES NOT APPLY WHEN
THE CHARGER IS ATTACHED TO THE
INSTRUMENT. REMOVE THE INSTRUMENT TO A
NON-HAZARDOUS AREA BEFORE CONNECTING
THE BATTERY CHARGER TO THE INSTRUMENT.
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Installation Model 3110
The unit can operate continuously for approximately 4 days on a set
of fully charged batteries. If more frequent charging is required, the
batteries are approaching the end of their useful life and should be
replaced. See Battery Replacement in Section 4.3 of this manual.
A low battery condition is indicated by a blinking red Low Battery
LED on the front panel. This will also cause the display to flicker along
with the blinking LED due to the power drain and low battery condition.
At this point the unit should be removed from service and the batteries
recharged.
Data-logger
Port (optional)
Battery
Charger
0-1 VDC
Signal Output
Sample In
and Vent
Connections
Figure 2-1: Model 3110 Rear Panel
2.2 Gas Connections
The customer must provide a means of controlling the pressure and
flowrate of the applied gas. For positive pressure applications, TAI
suggests a simple throttle valve installed in the sample line between the
sample point and the analyzer. The flowrate should be limited to
between 0.2 and 2.5 SCFH. The Sample In port is used for both sample
and calibration gas. For sampling at atmospheric pressure, connect a
pump and flow control valve downstream of the analyzer and draw
(rather than push) the sample through the instrument.
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Portable Oxygen Analyzer Installation
IMPORTANT: IF A PRESSURE REGULATOR IS USED, IT MUST
HAVE A METALLIC DIAPHRAGM. REGULATORS
WITH ORGANIC OR PLASTIC DIAPHRAGMS ARE
PERMEABLE TO OXYGEN AND, IF USED IN THE
SAMPLING SYSTEM, WILL LEAD TO HIGH OXYGEN
READINGS.
The instrument is shipped with a gas sampling and calibration kit.
This includes a 12” piece of clear tubing with a quick disconnect line for
use as a sample return or vent line plus two quick disconnect fittings to
be installed on the sample and calibration lines. These fittings employ
1/4” tube fittings which can be removed to reveal a 1/8” NPT internal
thread.
It is important in trace analysis applications to use metal for all
wetted components of the sample system. This includes gas lines, filters,
pump housing, diaphragms and any components in contact with the
sample gas. Plastic tubing and parts can be used for percent analysis but
will result in slow and inaccurate measurements at the ppm level.
There are two quick disconnect fittings installed on the rear panel
for mating the instrument with the sample or calibration gas and the vent
line. As shown in Figure 2-1, each fitting has a button which when
depressed allows the rapid detachment of the gas line from the
instrument. It is not necessary to press the button when inserting the
line, just push the male fitting into the mating connector. When a line is
removed, an internal seal prevents gas escape from the female sections
of the fitting.
Note: To avoid pressurizing the sensor, the vent line should be
installed first and removed last.
In setting up the sample lines, any valves used to set the sample
flow or filters must be located on the Sample In line. Do not place any
valves or restrictions on the vent line except as noted above for
atmospheric pressure sampling when using a downstream pump. Doing
so would increase the sensor operating pressure and result in inaccurate
analysis.
For trace analysis applications, a flowmeter should be installed in
the vent line but should not incorporate any control valves or restrictive
devices. For percent measurement applications, flowmeters or
rotameters (with or without control) valves can be placed upstream of
the analyzer, i.e. on the Sample In line.
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Installation Model 3110
2.3 Sensor Installation
The Model 3110 can accept either a percent or trace analysis
sensor. The procedure is similar for either sensor; however, a trace
sensor requires that the instrument lines be immediately purged with
zero gas after installing the cell.
2.3.1 Installing a Percent Sensor
To install a percent sensor:
1. Remove the cell holder cap from the bottom of the
instrument.
2. Remove the sensor from its packaging.
3. Remove the shorting plug at the top of the sensor.
4. Place the sensor on the top of the cell holder cap with the
concentric gold rings facing up.
5. Screw the cell holder cap and sensor into the bottom of the
analyzer.
2.3.2 Installing a Trace Sensor
Prior to installing the trace sensor, make sure the analyzer is ready
to purge with zero gas. Connect the vent line to the analyzer then
connect the zero gas line to the sample in port. Set the zero gas flow rate
to between 0.2 and 2.5 SCFH.
Prior to using any bottled gas for calibration or purge, it is good
practice to bleed the regulator and sample line to remove any traces of
trapped air. See Section 2.4.3 Bleeding the Regulator and Purging the
Gas Line.
Once the vent and zero gas lines are attached and the lines are
properly purged, proceed to install the trace sensor as follows:
1. Remove the cell holder cap from the bottom of the
instrument.
2. Remove the outer packaging from the sensor.
3. While the sensor is still in its packaging, grip the shorting
plug through the bag and remove it from the sensor.
4. Remove the packaging and rapidly place the sensor on the
top of the cell holder cap with the concentric gold rings
facing up.
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Portable Oxygen Analyzer Installation
5. Screw the cell holder cap and sensor into the bottom of the
analyzer.
Note: Minimize the time the sensor is exposed to air.
6. Start the purge flow through the analyzer and purge
overnight before calibrating the unit.
2.4 Calibration
Calibration involves using a span gas to calibrate the instrument.
The proper span gas oxygen concentration depends on the range that the
instrument will be used. The correct concentration should be 80-90% of
the range used. For instance, if the analyzer is to be used on a range of 0100 ppm oxygen, then a span gas should be prepared with 80-90 ppm
oxygen in nitrogen. If the analyzer is going to be used on a percent
range, acceptable accuracy may be obtained using air as a span gas.
2.4.1 Calibration Using Air for Percent Analysis
Note: Calibration requires a familiarity with the operational
screens and general operation of the instrument. Read
Chapter 3 to understand how to operate the instrument
before proceeding with the calibration step.
To calibrate the instrument using ambient air as a span gas:
1. If not already powered up, press the ENTER key to turn the
instrument on.
2. Set the filter to 1 or 2 on the filter screen.
3. Navigate to the SPAN VALUE screen and set the span to
20.9%. See Section 3.2.6.
4. Select the SPAN screen.
5. Install the vent and sample in lines in that order.
6. Remove the cell holder cap on the bottom of the instrument.
This exposes the cell to air for calibration.
7. Replace the cell holder cap after a few seconds and observe
the oxygen reading on the SPAN screen.
8. When the reading appears stable, select SPAN: START.
9. When the screen changes to SPAN: FINISH, select SPAN:
FINISH.
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Installation Model 3110
10. Expose the cell holder to air again by removing the cell
holder cap for a few seconds. Verify that the oxygen reading
is 20.9%.
Once the cell holder cap is sealed, the sensor will slowly consume
the trapped oxygen. You should notice that the on-screen oxygen
reading should slowly decrease as the oxygen is consumed.
The instrument is now calibrated and you can remove the sample-in
line and the vent line in that order.
2.4.2 Calibration Procedure for Trace Analysis
To calibrate the Model 3110 for trace oxygen measurements, the
instrument must be fitted with a trace sensor. The instrument must also
be purged overnight using a zero gas (a pure gas with no oxygen,
typically O2 free N2) before calibrating.
To calibrate the analyzer for trace analysis:
1. Purge the analyzer overnight.
2. Purge the calibration gas sample line, regulator, and control
valve. See Section 2.4.3.
3. Set the calibration gas flowrate to 1 SCFH.
4. Attach the vent line followed by the span gas line using the
quick disconnect fittings.
5. Navigate to the SPAN VALUE screen (see Section 3.2.6)
and set the span value to the known oxygen concentration in
ppm of the span gas.
6. Observe the oxygen reading on the screen to determine when
the reading has stabilized.
7. Navigate to the SPAN screen and select SPAN: START.
8. When the screen changes and displays SPAN: FINISH, select
SPAN: FINISH to set the span.
9. Allow the span gas to flow for several minutes to verify the
proper span setting.
10. Calibration is complete. Remove the span gas line first
followed by the vent line.
2.4.3 Bleeding the Regulator and Purging the Gas Line
When using bottled gas (gas cylinder) as a calibration gas for trace
analysis applications, the regulator and sample lines should be purged to
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Portable Oxygen Analyzer Installation
remove traces of trapped air. Otherwise, trapped air in the lines
(especially between the regulator and cylinder) will cause the analyzer
reading to slowly change over a period of hours.
To bleed the regulator and sample line:
1. Attach the regulator to the gas cylinder. Then attach a sample
line with a flow control/shut off valve preferably at the far
end of the sample line.
2. Open the shut off valve slightly, and then open the valve on
the gas cylinder.
3. Adjust the regulator to the desired pressure (usually 5 psi)
then close the cylinder valve.
4. Open the cylinder valve to pressurize the regulator fully then
close the cylinder valve again.
5. Open the sample flow control valve and allow the gas to
bleed down and vent to a safe area. Observe the secondary
gauge (low pressure side) on the regulator. As the low
pressure gauge starts to fall, close the sample flow control
valve.
6. Repeat steps 4 and 5 seven (7) times.
The sample delivery system is now purged and ready for calibration
or analysis. Keep the cylinder valve open to maintain system
pressurization.
Note: Make sure there are no leaks in the sample line and
regulator connections. Check also the cylinder connection
for leaks.
2.5 Set the Sample Flowrate
Once the system has been calibrated, the instrument can be brought
to the analysis site and the sample gas line can be connected to the unit.
Using the quick disconnect fittings supplied, connect the vent line
followed by the sample line to the rear panel. See Figure 2-1.
Once the sample gas is flowing, set the flow rate to 0.2-2.5 SCFH.
2.6 External Signal
A 0-1 VDC output signal is included with the Model 3110. When
installed, the output signal represents the percentage of oxygen in the
current range. For instance, if the range was set for 0 to 10 ppm, then 0.1
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Installation Model 3110
V would represent 1 ppm, 0.2V would be 2 ppm; 0.3V would be 3 ppm
etc.
This output signal, when installed, is accessible from the rear panel.
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Portable Trace Oxygen Analyzer Operation
Operation
The Model 3110 is supplied completely assembled and ready for
use. The micro-fuel cell is supplied in a separate sealed bag, and in the
case of trace sensors, was purged with an inert gas.
Turning the instrument on by pressing the ENTER key will power
the display and show the power on screen briefly (if the display shows
nothing or is very dark, adjust the contrast). The display will then
change to indicate the oxygen concentration within the internal sample
passageways if no sample line is attached.
Note: To extend cell life and minimize the time required to make
the next analysis, the instrument should always be purged
with an oxygen free inert gas prior to being taken out of
service for standby or storage.
3.1 Front Panel Interface
The Model 3110 is controlled from the keys on the front panel and
is shown in Figure 3-1. These keys are also used to setup the instrument
for your application. The keys are:
ENTER/ON
ESC/OFF
UP
DOWN
3.1.1 ENTER Key
The ENTER key is context sensitive. It is used as follows:
Powering ON or OFF—Pressing the ENTER key turns the
power ON. The ENTER key is also used the power OFF
from within the POWER OFF screen.
Enter SETUP—In certain menus, pressing the ENTER key
selects a setup screen for that particular function. Navigation
arrows on the left and right of the bottom line identify these
screens as setup screens by changing from UP/DOWN to
LEFT/RIGHT. The setup screens also blink.
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Operation Model 3110
Select a value—When multiple options or values exist for a
function, pressing ENTER selects the currently displayed
option.
Save changes—If a value or option has been modified,
pressing ENTER saves the change and brings you back to the
previous screen.
ESC/OFF
Down
Up
Enter/ON
Figure 3-1: Front Panel Keys
3.1.2 ESCAPE Key
The Escape (ESC) key is used to exit a setup menu without saving
any changes made to that screen. The values will revert to the last value
saved for that entry.
3.1.3 UP/DOWN Keys
The UP/DOWN keys are used to:
Navigate from one screen to another
Toggle between multiple options within a menu
Increment or decrement a value
3.2 Operation and Setup Screens and Menus
The Model 3110 operation and setup functions are arranged in a set
of 15 menus. All but the POWER ON screen are accessible via the
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Portable Trace Oxygen Analyzer Operation
UP/DOWN keys. Figure 3-2 shows the available menus and the
sequence of screens when scrolling.
Figure 3-2: Available Menus and Their Sequence
3.2.1 POWER ON Screen
The POWER ON screen automatically appears on the display when
the unit is first powered up. The display appears briefly and shows the
model number and software version. After a few seconds the display
reverts to the HOME screen.
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Operation Model 3110
3.2.2 HOME Screen
The HOME screen displays the oxygen concentration at the level of
the current range (ppm or %). The concentration is shown in the upper
line the current range is indicated on the second line.
Note: In almost all available screens, the first line displays the
oxygen concentration.
3.2.3 DATE Screen
Use the UP/DOWN keys to navigate to the DATE screen. The
second line of the DATE screen displays the current date and is used by
the data logger for date stamping data records. The currently set date is
displayed on the second line of the display.
To change the currently set date:
1. Press ENTER to enter the date setup function. Note the
navigation arrows that appear on the left and right sides of
the display change from UP/DOWN to pointing
LEFT/RIGHT.
2. Use the UP/DOWN keys to alter the month. Then press
ENTER. The cursor will move over to the next editable field.
3. Use the UP/DOWN keys to alter the day. Then press
ENTER. The cursor will move over to the next editable field.
4. Use the UP/DOWN keys to alter the year. Then press
ENTER.
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Portable Trace Oxygen Analyzer Operation
5. Press ENTER again to save the current date and
automatically return to the DATE screen.
At any time you can press the ESC key to abort the entry and return
to the DATE screen.
3.2.4 TIME Screen
Use the UP/DOWN keys to navigate to the TIME screen. The
second line of the this screen displays the current time in 24 hour
military format. This information is used by the data logger for time
stamping data records. The currently set time is displayed on the second
line of the display.
To change the currently set time:
1. Press ENTER to enter the time setup function. Note the
navigation arrows that appear on the left and right sides of
the display change from UP/DOWN to pointing
LEFT/RIGHT.
2. Use the UP/DOWN keys to alter the hour field. Then press
ENTER. The cursor will move over to the next editable field.
3. Use the UP/DOWN keys to alter the minute field. Then press
ENTER. The cursor will move over to the next editable field.
4. Use the UP/DOWN keys to alter the seconds field. Then
press ENTER.
5. Press ENTER again to save the current time and
automatically return to the TIME screen.
At any time you can press the ESC key to abort the entry and return
to the DATE screen.
3.2.5 AO Rng Screen
In this screen, the user defines the analysis range which sets the
scaling of the analog output to correspond to the range setting. For
instance, if the range is set to 100 ppm then the 0-1 VDC output would
track the concentration as follows:
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Operation Model 3110
Concentration
(ppm)
0 0 60 0.6
10 0.1 70 0.7
20 0.2 80 0.8
30 0.3 90 0.9
40 0.4 100 1.0
50 0.5
Output
(V)
Concentration
(ppm)
Use the UP/DOWN keys to navigate to the AO RNG screen and
then press ENTER. The following screen appears:
Output
(V)
To define or change the range setting:
1. Use the UP /DOWN keys to change the range value. Press
ENTER when the desired value is shown. The value will be
accepted and the cursor will move to the next editable field
(units).
2. Use the UP/DOWN keys to cycle between ppm and percent
for units. Press ENTER to accept the displayed unit. The
display will then return to the HOME screen.
Note: The range setting resolution is 0.1 PPM for trace analysis
and 0.01% for percent analysis.
3.2.6 SPAN VALUE Screen
The SPAN VALUE screen displays the oxygen concentration of the
span gas used for calibration. This is not a measured value; it is the
known span gas concentration that is input to the analyzer by the
operator.
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Portable Trace Oxygen Analyzer Operation
To change the span gas concentration:
1. Use the UP/DOWN keys to navigate to the SPAN VALUE
screen. Then press ENTER to enter the setup screen.
2. Use the UP /DOWN keys to change the span value. Press
ENTER to accept the displayed value and to return to the
SPAN VALUE screen.
3.2.7 SPAN Screen
This screen is used to perform a span calibration on the Model
3110. The appropriate span value must have already been input to the
instrument. See Section 3.2.6 for entering a span value into the analyzer.
CAUTION: THE CORR ECT SPAN VALUE MUST BE ENTERED
INTO THE INSTRUMENT THAT CORRESPONDS TO
THE ACTUAL SPAN GAS USED. FAILURE TO ENTER
THE PROPER VALUE WILL RESULT IN ERRONEOUS
READINGS.
Note: The filter should be set to a low value to avoid errors
during span setting. Allow the oxygen reading to become stable
prior to setting the span.
To perform a span calibration:
1. Use the UP/DOWN keys to navigate to the SPAN screen.
Then press ENTER to start the span calibration.
Once the span calibration has begun, the screen changes to reveal a
span finish selection.
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Operation Model 3110
2. When the FINISH selection appears, press ENTER once the
analyzer is providing a stable oxygen concentration on the
span gas. This will end the span calibration. The analyzer
will accept the calibration and return to the HOME screen.
Note: After successfully performing a span calibration, you are
returned directly to the HOME screen rather than back to
the previous menu.
3.2.8 Filter Screen
The 3110 includes user adjustable digital filter. The filter has
settings 1-10. Setting 1 is the least amount of filtering and 10 is the
highest level of damping. The filter is used to reduce the noise level of
the O2 readings. More filtering is required for lower trace ranges such as
10 ppm. Adding filtering will slow down analyzers response to changing
O2 levels. The lowest effective level of filtering should always be
selected. The filter level should be lowered to 1 or 2 when setting the
span to avoid delays. For a 0-10PPM range a filler setting or 6 or 7
should typically provide good results.
To use this feature:
1. Use the UP/DOWN keys to navigate to the FILTER screen.
Then press ENTER to enter the setup screen.
2. Use the ENT/ON key to change the filter to the active mode.
The arrows will point left and right and the filter setting will
blink.
3. Use the UP/DOWN keys to select the desired setting.
4. Select the ENT/ON key to save the setting and to return to
the non-active mode on the filter screen.
3.2.9 LOG INTV Screen (Optional)
This screen is for use with the data logger option only. It indicates the
time interval between data samples taken by the data-logger. The interval
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Portable Trace Oxygen Analyzer Operation
can be set between 1 second (00m 01sec) to 60 minutes (60m 00sec) in
increments of 1 second.
To change the interval between data samples:
1. Use the UP/DOWN keys to navigate to the LOG INTV
screen. Then press ENTER to enter the setup screen.
2. Use the UP /DOWN keys to change the interval value. The
value of the seconds will increase or decrease followed by
the minutes. Press ENTER to accept the displayed value and
return to the LOG INTV screen.
3.2.10 LOG RESET & START Screen (Optional)
Once a log interval has been input, the LOG RESET & START
screen is used to start the data-logger.
The data logger has a 3200 record capacity and each record uses 10
bits of data. The data set is retained until it is reset by using the START
RESET menu again. The data set can be downloaded using the LOG
TRANSMIT screen (see Section 3.2.11).
To start the data logger:
1. Use the UP/DOWN keys to navigate to the LOG RESET &
START screen and press ENTER.
2. When the screen begins to blink press ENTER again to start
the data logger. Once the data logger has started, the screen
changes RESET&START to STOP. During logging a
blinking “L” appears in the upper left corner of the screen.
To stop the data logger:
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Operation Model 3110
1. Press ENTER to stop the data logger and return to the LOG
RESET & START screen.
3.2.11 LOG TRANSMIT Screen
Data can be downloaded to a computer using the 9-pin Dsubminiature port and cable attached to a PC. The D-sub port accepts a
standard data cable with a DB-9 connector. The computer must be able
to accept data from a source with the following characteristics:
9600 baud
8 bit data
no parity
1 stop bit
no flow control
Refer to your computer manual for details on how to setup the RS232 communications port on your computer.
To download a data log:
1. Use the UP/DOWN keys to navigate to the LOG TRANSMIT
screen. Then press ENTER to enter the setup screen.
2. Press ENTER again to transmit the current data log.
Note: The data set will be transmitted each time you press the
ENTER key. Use the ESC key to exit the LOG TRANSMIT
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Portable Trace Oxygen Analyzer Operation
menu.
3. Press ESC to exit out of the LOG TRANSMIT screen and go
to the home screen.
Note: The Date Log does not need to be stopped in order to
transmit the date.
3.2.12 POWER DOWN Screen
This screen is used to power off the instrument. This can also be
achieved by holding the ESC button for a few seconds.
To turn the analyzer off:
1. Use the UP/DOWN keys to navigate to the POWER DOWN
screen. Then press ENTER.
2. Press ENTER again to turn the instrument OFF.
In a few seconds the analyzer will turn off.
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Portable Trace Oxygen Analyzer Maintenance
Maintenance & Troubleshooting
4.1 Routine Maintenance
Other than replacing the sensor, there are no user-serviceable
components within the instrument housing other than the cell holder Oring. Routine maintenance consists of wiping down the instrument case,
cleaning the screen and checking for leaks.
CAUTION: USING ABRASIVE CLEANSERS OR SOLVENTS WILL
DAMAGE THE SCREEN. USE ONLY A MILD
DETERGENT AND SOFT CLOTH WHEN REMOVING
DIRT OR GREASE MARKS FROM THE SCREEN.
When cleaning the instrument case, do not flood with water or use
harsh, abrasive or solvent cleansers. These cleansers will attack the LCD
lens material as well as eventually wear off the silk-screened legends.
4.2 Opening the Instrument Case
CAUTION: DEPENDING ON THE APPLICATION, IT MAY BE
NECESSARY TO PURGE THE INSTRUMENT THEN
REMOVE THE INSTRUMENT TO A NONHAZARDOUS AREA BEFORE OPENING THE
INSTRUMENT CASE.
To open the enclosure:
1. Loosen (counter-clockwise) the three (3) ¼-turn screwdriver-
type fasteners on the back of the outer enclosure.
2. Pull off the back section of the cover
4.3 Replacing the Battery
After many charge/recharge cycles of the battery, eventually the
Ni-Cd batteries will have to be replaced. Usually, when the instrument
requires more frequent charge cycles than before it is time to change the
batteries. Refer to the Spare Parts Listing in the Appendix for the correct
replacement battery. Note: The batteries should only be replaced by a
qualified technician.
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Maintenance Model 3110
4.4 Battery Power Supply Service
The Model 3110 is designed to be intrinsically safe, and is designed
for use only when not connected to the AC power line. TAI suggests
that an overnight recharge be performed every few days for continuous
use.
The low battery LED will begin to blink and the display will flicker
when the batteries are getting low. At this point, the batteries should be
recharged. To recharge the batteries, turn the instrument OFF (see
Section 3.2.12. Remove the instrument to a safe non-hazardous location.
Note: Depending on the application, purging may be required
before disconnecting the analyzer and moving it to a safe
location.
Plug the AC charger into a suitable 100-240 VAC 50/60 Hz power
source. Plug the other end of the charger cable into the port on the rear
of the instrument. Figure 4-1 shows the AC charger port on the rear
panel.
Note: During charging, the green battery charging indicator LED
will illuminate.
When recharging is completed, unplug the unit from the AC outlet
and disconnect the cable from the AC charger port.
Note: The analyzer cannot be turned on while the AC charger is
attached.
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Portable Trace Oxygen Analyzer Maintenance
Battery
Charger
Figure 4-1: Battery Charger Port on the Model 3110
4.5 Cell Replacement
The characteristics of the micro-fuel cell are similar to those of a
NiCad battery in that both provide an almost constant output through their
useful life, and then fall off sharply towards zero at the end. If the sample
being analyzed has a low oxygen concentration, cell failure will probably
be indicated by the inability to properly calibrate the analyzer. You will find
that very little span adjustment will be required to keep the analyzer
calibrated properly during the duration of a given cell’s useful life. If large
span adjustments are required to calibrate the instrument, or calibration
cannot be achieved within the range of the control, the cell shou ld be
immediately replaced. Refer to Section 4.4 before replacing the cell.
To offset the possibility of not having a replacement cell available
when it is needed, TAI recommends that a spare cell be purchased
shortly after the instrument is placed in service, and each time the cell is
replaced thereafter.
The spare cell should be carefully stored in an area that is not
subject to large variations in ambient temperature (75 °F nominal), and
in such a way as to obviate any possibility of incurring damage. Under
no circumstances should you disturb the integrity of the cell
package until the cell is to be actually used. If the cell package is
punctured and air permitted to enter, the cell will immediately start to
react to the presence of oxygen.
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Maintenance Model 3110
CAUTION: THE MICRO-FUEL CELL CONTAINS KOH SOLUTION,
WHICH IS CAUSTIC. SHOULD THE CELL RUPTURE,
A LEAK MAY CAUSE INJURY. PLEASE REFER TO
MATERIAL SAFETY DATA SHEET IN THE APPENDIX
TO LEARN ABOUT POTENTIAL HAZARDS AND
CORRECTIVE ACTION IN CASE OF ACCIDENT.
No tools are required to replace the cell in the instrument. Simply
unscrew (counterclockwise) the plug at the bottom of the analyzer and
the cell will drop out of the manifold cavity.
Remove the new cell from its package, and carefully remove the
shorting clip. Do not touch the silver-colored sensing surface of the cell,
as it is covered with a delicate Teflon membrane that can be ruptured in
handling.
Place the cell on the end of the cell holder cap so that the sensing
surface of the cell is in contact with the cap and the electrical contact
plate end of the cell is facing upwards. Insert the cell and cap in the
manifold cavity, and screw the cap back into place. Apply as much
pressure as you can with your fingers, but use no tools.
After the cell has been installed, purge the instrument with an inert
gas (or the sample), and then proceed as directed in section 3.1.1.
4.6 Cell Warranty
The majority of micro-fuel cells used in the Model 3110 carry a
six-month warranty from date of service.
With regard to spare cells, service time starts when the cell is
removed from its shipping package. The customer should stock only one
spare cell per instrument at a time. Do not attempt to stockpile spare
cells.
If the Model 3110 is used in trace analysis applications where CO
is a major component in the sample, the A2C micro-fuel cell should be
used. At low CO2 concentrations (1,000 PPM or less) the standard B2C
cell performance will not be affected. Figure 4-2 shows the effects of
CO
on the cell life of a Class B-2C cell.
2
If the analyzer is going to be used on percent ranges, a B-1 cell can
be used. The B-1 sensor will provide better service life in percent
applications.
2
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Portable Trace Oxygen Analyzer Maintenance
WARNING: EVIDENCE OF DAMAGE DUE TO TAMPERING OR
MISHANDLING WILL RENDER THE CELL
WARRANTY NULL AND VOID.
4.7 Temperature Compensation
The micro-fuel cell has an inherent positive temperature coefficient.
Compensation is performed internally by the microprocessor and needs no
further adjustment.
Contact the factory if you suspect temperature related inaccuracies
during monitoring and are operating within the instrument’s temperature
operation range.
4.8 Leak Testing
WARNING: IF A LEAK IS SUSPECTED IN THE UNIT, DO NOT
ATTEMPT TO TIGHTEN THE DISCONNECT
FITTINGS. THE FITTINGS ARE POTTED IN EPOXY
AND TIGHTENING THEM WILL BREAK THE SEAL.
To check for leaks, TAI recommends one of the following
procedures:
Procedure I:
1. Purge the instrument to as low a value as possible. Use a
sensitive range for analysis for instance, 0-1% range Take
note of the oxygen concentration.
2. Place the vent line in water and disconnect the sample.
3. Next, disconnect the vent line and use the same analysis
range. The reading should not increase above the level to
which you purged to.
Procedure II:
1. Purge the instrument with nitrogen at the sample port.
2. Note the reading once is has stabilized (at least 24 hours on
the 0-10 PPM range) and at a flowrate of approximately 1
SCFH.
3. Increase the flowrate from 1 SCFH to 2 SCFH.
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Maintenance Model 3110
4. Note how much the reading has changed after a few minutes.
5. Reduce the flowrate to 0.5 SCFH.
6. Note how much the reading has changed.
7. The reading should change by less than 10% of the original
value
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Portable Trace Oxygen Analyzer Maintenance
Effect of CO2 on B-2C Cell Life
1. This curve assumes continuous exposure.
2. Intermittent exposure will extend life. In
general, the CO2 effect is cumulative and
the average CO2 concentration should be
used to find the predicted cell life.
3. Cells can be used to make spot check
measurements of O
high concentrations of CO
in the presence of
2
(up to 50%
2
and more). Any sample containing CO2
should be purged as soon as a constant
reading is obtained.
4. Abnormally slow response and recovery
is characteristic of cells used as indicated
in notes 1, 2, and 3 above.
5. The reduction in cell life is primarily due
to a drop in output. Cell life will reduce
to a point where the instrument can no
longer be spanned. Instruments using B-2
cells in CO2 atmospheres should be
spanned at intervals of 10-20% of the
predicted cell life.
6. The CO2 effect on B-2 cells is
independent of the O2 level. Usage in
contributes significantly to cell life
CO
2
reduction and thus affects cell warranty.
Figure 4-2: Effects of CO2 on B-2 Cell Life
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Portable Trace Oxygen Analyzer Appendix
Appendix
A.1 Specifications
Certification: FM-approved, Intrinsically Safe,
Class I Div 1 Group A-D T6
Micro-fuel Cell Class: B-2C, B-1, A-2C, A-5, B-2CXL, A-
2CXL, B-2C Insta-trace, A-2C Insta-trace,
B-2CHS, A-2CNG
Ranges of Analysis: 1 user defined range
0-10 ppm to 0-25% (std 3110)
0-2 ppm to 0-25% (3110XL)
0-1% to 0-25% (3110P)
Accuracy: ±2% of scale or ±1 PPM (whichever is
greater) at constant temperature;
±5% of reading or ±1 PPM (whichever is
greater) over the operating temperature
range.
Operating Temp. Range: 0°C to 40°C (32°F to 104°F)
Sample Temp. Range: 0-40°C
Sample Flow Rate: 0.5 – 2.5 SCFH
Recommended Span Gas: Atmospheric air for percent analysis or
80-90% of range most likely to be used
Signal Output: 0-1 VDC
Electrical safety parameters
Uo = 4.65 V, Io = 193.74 mA,
Po = 225.2 mW, Co = 90 uF,
Lo = 0.7 mH, Lo/Ro = 157.86 uH/Ohm
:
Dimensions: 10.9” x 6.2” x 5.2” deep
Weight: 4.4 lbs. (2.0 kg.)
Power Requirements: 100-240 VAC 47-63 Hz Charging Adapter
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Appendix Model 3110
A.2 Spare Parts List
QTY P/N DESCRIPTION
1 O-165 Cell Cap O-Ring (standard)
2 B82162 Battery (must be installed by a
qualified technician)
1 A761 Battery Charger, Universal
1 CP2487 2-pin 0-1 VDC Output Plug
1 A36289 Calibration Kit Std.
2 F1378 Fuse 200 mA (T)
1 C78853 Cell Cap with O-Ring (standard)
* Micro Fuel Cell Options
1 C6689-B2C* Micro-Fuel Cell, Class B-2C
1 C6689-B1 Micro-Fuel Cell, Class B-1
1 C6689-A2C Micro-Fuel Cell, Class A-2C
1 C6689-A5 Micro-Fuel Cell, Class A-5
1 C6689-B2CXL Micro-Fuel Cell, Class B-2CXL
1 B74033-A2CXL Micro-Fuel Cell, Class A-2CXL
1 B71875 Micro-Fuel Cell, B-2C Insta-trace
1 B73016 Micro-Fuel Cell, A-2C Insta-trace
1 B73592 Micro-Fuel Cell, B-2CXL Insta-
trace
1 B78640 Micro-Fuel Cell, Class B-2CHS
1 B76953 Micro-Fuel Cell, Class A-2CNG
A minimum charge of US$200.00 applies to spare parts orders.
IMPORTANT: Orders for replacement parts should include the model
number, serial number, and range of the analyzer for
which the parts are intended.
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Portable Trace Oxygen Analyzer Appendix
Orders should be sent to:
TELEDYNE ANALYTICAL INSTRUMENTS
16830 Chestnut Street
City of Industry, CA 91748
Phone: (626) 961-9221
FAX: (626) 961-2538
TWX: (626) 934-1651
or your local representative
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