Teledyne Snack O2 User manual

Rev. 2.1
SNACK O2Analyzer
Oxygen Gas Analyzer Owners Manual
Teledyne Electronic Technologies
Analytical Instruments
626.934.1500
www.teledyne-ai.com

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Table of Contents
Table of Contents.......................................................3
Introduction................................................................5
Specifications.............................................................5
Oxygen (O2) sensor.......................................................5
Battery Life Notes......................................................5
Functions....................................................................6
Power Switch .........................................................................6
Operate Mode................................................................7
LCD Display...........................................................................7
Buttons Functions (Operate Mode)........................................8
Program Mode...............................................................8
Buttons Functions (Program Mode).......................................8
Parameter Menu....................................................................8
Operation..................................................................10
Drawing A Sample.......................................................10
Sample Duration..........................................................10
Sleep Mode Timeout....................................................10
Auto Hold Function.....................................................11
Battery Level Indicator................................................11
Battery Charging.........................................................11
Filter.............................................................................11
Oxygen Resolution Adjustment .................................11
Sensor Life Indicator...................................................11
Calibration................................................................12
Oxygen Sensor (O2).....................................................12
Maintenance and Adjustments...............................12
Opening / Closing The Analyzer Case .......................12
Replacing the Oxygen sensor ....................................13
Battery Replacement...................................................15
Troubleshooting.......................................................16
Technical Support / Accessories............................17
Warranty ...................................................................18
Figures......................................................................19
Figure 1........................................................................19
Figure 2........................................................................20
Figure 3........................................................................21

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Notice: Manufacturer shall not be liable for technical or editorial errors or omissions contained herein;
nor for incidental or consequential damages resulting from the furnishing, performance, or use of this
material. This guide contains information protected by copyright. No part of this guide may be
photocopied or reproduced in any form without express written consent of the Manufacturer.
Information in this guide is subject to change without notice.

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Introduction
Congratulations on the purchase of a SNACK O2gas analyzer. We are confident
that you will find this gas analyzer to be accurate, reliable and easy to use.
Designed for portability, this analyzer is well suited for a number of applications and
in all sorts of environments. Please take a moment to browse through this manual
and to familiarize yourself with the various features and functions of the analyzer.
Specifications
Operating Temperature: 32°– 122°(0°– 50°C)
Operating Humidity: 5 – 95% RH, Non-
condensing
Response Time: 90% of reading < 3 sec.
Warm-up Time: None.
Calibration: O2- Atmosphere (20.9%
O2).
*Battery Life: 1 hour continuous sample
Power Requirements: 12 VDC (500 mA) external
power.
Weight: 48 oz.
* approximation
Oxygen (O2) sensor
Range: 0 – 100% O2
Accuracy:* +/- 1% reading full scale
Repeatability: Better than 0.1% O2
Battery Life Notes
The analyzer has been designed to minimize power consumption. Factors such as
ambient temperature and device usage have an effect on battery performance. For
optimal battery life, follow these tips:
• Place the Power switch in the OFF position whenever analyzer is not being used
for any long period of time.
• Utilize external power source whenever possible.
• In Batt. position, turn off the LCD Back Light when not needed.
• Set the Sleep Mode Timeout to a usable minimum.
• Never store the analyzer over long periods of time with dead batteries. To do so
may cause damage and shorten battery life.
• Do not store the analyzer over long periods of time with the external power
source plugged in.

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Functions
The analyzer has two modes of operation, the Program Mode and the Operate
Mode.
Power Switch
Switch Position Description
OFF Analyzer power is off. Batteries
will continue to charge if Power
Supply is connected.
Batt. Battery Power – Analyzer is on
and drawing power from the
internal batteries. Batteries will
continue to charge if Power
Supply is connected.
Ext. External Power – Analyzer is on
and is drawing power from either
the external battery or the
external power supply. If the
external power supply is
connected, then the Batteries
(both internal and external) will
continue to charge while switch
is in this position. Analyzer will
not operate in this switch
position if the Power Supply or
external battery is not
connected.

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Operate Mode
The Operate Mode is the default mode of operation when the Power Switch is
placed in the on (Batt. or Ext.) position. O2is displayed in the LCD and the sample
button is available to operate the pump and draw samples.
LCD Display
Displayed Description
O2XX.X(X) Oxygen Reading (%)
O2-XX.XX (
-) Indicates the sample pump is
running.
•
••
••
••
••
••
••
••
•Indicates that the analyzer is in
the battery saving sleep mode.
Cycle the power switch to return
the analyzer to the Operate
Mode.
Low Batt Indicates that the internal
batteries are low on power and
need to be charged.
RE-CAL? Indicates that the internal
processor has reset and
parameter values have been
reset to the default setting.

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Buttons Functions (Operate Mode)
BUTTON FUNCTION
MENU Places the analyzer into the
Program Mode.
ON (Light) Turns on the display Back Light.
OFF (Light) Turns off the display Back Light.
SAMPLE Turns on and off the sample pump.
Program Mode
The Program Mode allows the user to view and change the parameter values (i.e.
Sample duration, Sleep timer, etc.). The user may enter the Program Mode by
pressing the MENU button. Repeatedly press the MENU button to cycle through the
parameter menu. Pressing the SAVE button will save all changed parameter values
and returns the analyzer back to the Operate Mode.
Buttons Functions (Program Mode)
BUTTON FUNCTION
MENU Places the analyzer in the
Program Mode and cycles
through the parameter menu.
SAVE Saves all changed parameter
values and returns the analyzer
to the Operate Mode.
Arrow Up (!) Adjusts parameter values up.
Arrow Down (") Adjusts parameter values down.
YES / NO Answers yes / no questions.
Parameter Menu
Displayed Description
O2CAL? Calibrate oxygen sensor? Press
the YES/NO button to display
the calibration value.
O2 XX.XX Oxygen calibration value (%) –
Use the arrow buttons to ad
j
ust

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the value.
Samp. XX Sample duration – Pump will run
for xx number of seconds then
stop. Adjust using the arrow
buttons.
01 – 99 seconds
00 = No timed duration
Sleep XX Sleep mode timeout – Analyzer
will go into battery saving sleep
mode after xx number of
minutes. Adjust using the arrow
buttons.
01 – 99 minutes
00 = No timeout
Hold on/off Auto Reading Hold – Indicates if
the auto hold function is ON or
OFF. Use the arrow buttons to
toggle between on and off.

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Operation
Drawing A Sample
The following is a general procedure check list to start and use the gas analyzer.
1. Place the POWER switch in either the Batt. or Ext. position. The LCD will
display O2. (Note: the O2reading will not display until the SAMPLE button has
been pressed.)
2. Connect the sample line to the Sample Connector located at the top of the
analyzer. Ensure that there is an inline filter in the sample line. Failure to use
the inline filter may cause damage to the sensor and sample pump.
3. Place or connect the end of the sample line to the space to be sampled.
A) M.A.P. – Insert the sample needle into the package’s head space. Avoid
placing the needle into product or fluid.
4. Press the SAMPLE button. The sample pump will draw in a gas sample and the
current O2reading will be displayed. The pump will continue to run until the
Sample Duration times out or until the SAMPLE button is pressed again.
If the Auto Hold function is on, then the O2displayed value will lock when the
pump stops.
Note: The duration of sample time will vary from one application to another. In
general, the longer you draw in a sample, the more accurate the gas analysis will
be. Adjustments of the Sample Duration timer will be needed to find the right
amount of sample time for your specific application.
5. Press the Light ON button to turn on the LCD Back Light.
Sample Duration
The Sample Duration timer allows you to set the number of seconds the pump will
run and draw in a sample after the SAMPLE button is pressed. The sample pump
may be stopped at any time by pressing the SAMPLE button. This timer can be
adjusted in the parameter menu.
Placing the Sample Duration timer to zero (0) seconds sets the pump to a manual
mode. Press the SAMPLE button to start the pump. The pump will continue to run
until the SAMPLE button is pressed again.
Sleep Mode Timeout
The Sleep Mode Timeout allows you to set the number of minutes the analyzer will
wait without any button activity before going into the battery saving sleep mode.
This timer can be adjusted in the parameter menu.