Teledyne 9070 User manual

TELEDYNE ANALYTICAL INSTRUMENTS
OXYGEN / CARBON DIOXIDE
ANALYZER / TRANSMITTER
MODEL 9070
May 1998

Getting Going Fast……
How to get your 9070 Analyzer working for you with the minimum of fuss…..
1. Plug the power lead into the Analyzer and into the power point.
2. Turn on the power at the power point.
3. Screw the sample pipe onto the 1/8” Swagelok tube connector, on the right hand side of the Analyzer.
4. Wait 10 minutes for the oxygen sensor to get over 700°C.
The display will look like this if the Analyzer is oxygen only.
The display will look like this if the Analyzer is oxygen and carbon dioxide.
Oxygen 20.9%
Sensor Deg 720C
O2 20.9% CO2 0.0
Sensor Deg 720C
The 9070 Analyzer is now reading oxygen (and carbon dioxide if installed).
5. Insert the hypodermic through a septum into a food pack to get a gas reading. Leave the hypodermic in the pack
for 4 to 6 seconds, or until the head space is nearly all pumped out. Don’t suck in the food product.
(See question #1, in Frequently Asked Questions on the next page)
6. If you want to display the minimum oxygen, press the DISPLAY button until the lower line of the display reads
“Sample” like this-
Some of the menu items that may have to be set the first time the Analyzer is used…..
Lower Line
Oxygen 20.9%
Sample 0.68%
1. Select the “Sample mode” (Setup # 26).
Continuous. When the process gas is available continuously. Eg Gas supply monitoring.
Display Sample. When sampling a gas from a food pack.
Fast Sample When sampling a gas from a food pack with very small head space. (<50cc)
2. Select the “Display Mode” (Setup # 27)
Oxygen % The oxygen will be displayed as a percentage down to 0.1%, then ppm down to 0.1ppm.
Oxygen PPM The oxygen will always be displayed as parts per million.
O2/CO2 % only The same as ‘Oxygen %’ with carbon dioxide also displayed.
O2/CO2 %/PPM The same as ‘Oxygen PPM’ with carbon dioxide also displayed.
3. Select the alarm levels, if either a light or a relay contact is required if the oxygen/carbon dioxide is high/low.
Page 2Teledyne Analytical Instruments 9070 Oxygen Analyzer

High Oxygen Setup # 39
Low Oxygen Setup # 41
Very Low Oxygen Setup # 43
High Carbon Dioxide Setup # 45
Low Carbon Dioxide Setup # 47
4. Select the output range for one or both output channels. ie To allow the oxygen or carbon dioxide to be
transmitted to another instrument.
Channel 1, Setup # 20 to 22
eg Oxygen 0.1 to 100.0%
Low Oxygen 10 to 10,000 PPM
Channel 2, Setup # 23 to 25
eg Sample Oxygen
Low Oxygen
Carbon dioxide
Frequently Asked Questions……..
1. How do I insert the hypodermic needle into the food pack?
Cut a 1.5 cm length of the septum strip. Peal the backing tape off. Squeeze the food pack to get the gas into one place.
Press the septum piece firmly onto the plastic wrapping film. Insert the hypodermic needle into the headspace through
the septum without touching the food product.
Leave the needle in the food pack until the pack has nearly collapsed, or at least 4 seconds for an oxygen measurement,
and 6 seconds for an oxygen and carbon dioxide measurement.
The septum strip will self-seal and can be re-used several times.
2. How often do I have to calibrate the Analyzer?
Oxygen – Once per year.
The 9070 uses the extremely stable zirconia oxygen sensor technology. In addition, the Analyzer automatically
corrects for any drift in the Analyzer.
Carbon dioxide – Every 6 months, or for critical applications every 2 - 3 months.
The carbon dioxide sensor uses a specifically designed infra red source to increase the signal strength and reduce the
effect of sensor drift. However optical measurements are not absolute measurements like the zirconia oxygen sensor,
so occasional checks on a calibration gas confirm the accuracy.
3. Why are there 3 sample modes, and which one should I use?
The 9070 Analyzer can read and display the current level of oxygen and carbon dioxide,
or
It can pick the minimum/maximum oxygen and the maximum carbon dioxide.
Use ‘Continuous’ mode if the Analyzer is to read a continuous supply of gas, such as monitoring a gas blanket over
milk powder.
Use either ‘Display Sample’ or ‘Fast Sample’ if the gas to be tested is in a food pack. The size of the pack will
determine which of these two modes to use. Use Fast Sample if the package has less than 50cc head space. The
Display Sample mode has the added advantage of displaying the oxygen and carbon dioxide levels as they change
through the testing process.
4. Why does the back of the cabinet get so warm?
The zirconia oxygen sensor runs at about 720°C. The small furnace is mounted in the vented section at the back of the
cabinet.
5. When should I replace the small disc filter on the hypodermic needle?
It will depend on the application, but you will know that the filter is blocked when the response time is much quicker
when the filter is removed. The filters are much cheaper than the oxygen sensor. Keep spares handy.
Teledyne Analytical Instruments 9070 Oxygen Analyzer Page 3

CONTENTS
1. SPECIFICATIONS
2. DESCRIPTION
3. INSTALLATION & COMMISSIONING
4. OPERATORS FUNCTIONS - ALARMS
5. SETTING UP THE ANALYZER
6. MAINTENANCE
APPENDIX
1. OXYGEN SENSOR EMF TABLES
2. LOGARITHMIC OXYGEN SCALE
3. SAMPLE LOG PRINT OUT
4. CIRCUIT SCHEMATICS
Note: This manual includes software modifications up to Version 7.81, April 14, 1998
© Copyright TELEDYNE ANALYTICAL INSTRUMENTS (AUST.) PTY LTD - 1996
Neither the whole nor any part of the information contained in, or the product described in, this manual may be adapted
or reproduced in any material form except with the prior written approval of Teledyne Analytical Instruments (Aust)
Pty Ltd (Teledyne Analytical Instruments).
The product described in this manual and products for use with it, are subject to continuous developments and
improvement. All information of a technical nature and particulars of the product and its use (including the information
in this manual) are given by Teledyne Analytical Instruments in good faith. However, it is acknowledged that there
may be errors or omissions in this manual. A list of details of any amendments or revisions to this manual can be
obtained upon request from Teledyne Analytical Instruments Technical Enquires. Teledyne Analytical Instruments
welcome comments and suggestions relating to the product and this manual.
All correspondence should be addressed to:
Technical Enquires
Teledyne Analytical Instruments (Aust.) Pty Ltd
16830 Chestnut Street
City of Industry Phone: [phone]
CA 91749-1580 Fax: [phone]
USA
All maintenance and service on the product should be carried out by Teledyne Analytical Instruments authorised
dealers. Teledyne Analytical Instruments can accept no liability whatsoever for any loss or damage caused by service
or maintenance by unauthorised personnel. This manual is intended only to assist the reader in the use of the product,
and therefore Teledyne Analytical Instruments shall not be liable for any loss or damage whatsoever arising from the
use of any information or particulars in, or any error or omission in, this manual, or any incorrect use of the product.
Page 4Teledyne Analytical Instruments 9070 Oxygen Analyzer

USING THIS MANUAL
The Teledyne Analytical Instruments9070 Trace Oxygen Analyzer has a variety of user-selectable functions.
They are simple to use because each selection is menu driven. For options you are not sure about, read the manual on
that particular item.
Please read the safety information below and the ‘Installation’ section before connecting power to the Analyzer.
CAUTION 1
The oxygen sensor heater is supplied with mains voltage. This supply has electrical shock danger to maintenance
personnel. Always isolate the Analyzer before working with the oxygen sensor.
The oxygen sensor must ALWAYS be connected to EARTH.
CAUTION 2
The oxygen sensor which is heated to 720°C (1320°F) in this instrument can be a source of ignition in applications
where fuel gases or very high oxygen percentages (above 50%) are present. For these applications, it will be necessary
to provide a sampling line made of flame proof material, with adequate flashback arresters. If this configuration does
not suit or if it is possible for raw fuel to come into contact with a hot oxygen sensor then the Model 9070 Analyzer
with a heated sensor may be unsuitable for your application.
Teledyne Analytical Instruments 9070 Oxygen Analyzer Page 5

SPECIFICATIONS
1
1.1 MODEL 9070 OXYGEN ANALYZER DESCRIPTION
1.2 DETAILED SPECIFICATIONS
1.3 ORDERING INFORMATION
1.4 MODEL SELECTION GUIDE
Page 6Teledyne Analytical Instruments 9070 Oxygen Analyzer

SPECIFICATIONS
1.1 MODEL 9070 OXYGEN ANALYZER DESCRIPTION
The Teledyne Analytical Instruments model 9070 oxygen/carbon dioxide Analyzer/transmitter provides an integrated
instrument for measurement of oxygen and carbon dioxide for food packaging and gas monitoring. The Analyzer
provides local indication of oxygen/carbon dioxide, plus eight other selectable variables, including minimum sample
hold level.
Two linearised 4–20 mA output signals are provided. Alarms are displayed at the Analyzer and relay contacts activate
remote alarm devices every minute.
The 9070 has a keyboard for selecting the output range, display options, alarm levels, etc. The instrument is
microprocessor based and all adjustments are made using the keyboard.
• Used for continuous gas sampling, food pack testing
• Simple to use
• Sensitive down to 0.1 ppm oxygen
• Displays 0.1% carbon dioxide resolution
• Automatic minimum/maximum sample detection, display and output to printer and 4–20 mA signals
• Automatic calibration of oxygen and carbon dioxide offset
• Linear output of % oxygen and carbon dioxide for recording or control
• Built in safety features
• 16 different alarm functions warn the operator of gas composition, sensor or Analyzer problems
• RS 232C/RS 485 printer/computer interface
1.2 DETAILED SPECIFICATIONS
Measuring Range
• 0.1 ppm to 100% oxygen
• 0 to 100 % carbon dioxide
Response Time
• Less than two seconds with a gas flow of 400 cc (50 scfm) per minute, oxygen
• Less than six seconds with a gas flow of 400 cc (50 scfm) per minute, carbon dioxide
Accuracy
• ±1% of actual measured oxygen value with a repeatability of ±0.5% of measured value.
• Carbon dioxide ±3%
Warm Up Time
• Fifteen minutes approximately for optimum accuracy. Useful readings are possible within 10 minutes after
switching the instrument on.
Teledyne Analytical Instruments 9070 Oxygen Analyzer Page 7

Outputs
• Two isolated linearised 4–20 mA DC outputs into 1000Ωload (max).
• RS232/485 computer/printer interface for peak oxygen/carbon dioxide value report and alarm functions.
• One common alarm relay for self diagnostic alarms
• One user selectable alarm relays for gas related alarm levels, ‘Sensor low temperature’ and ‘Calibration in
progress’.
Power
• 240/110 VAC, 50/60 Hz, 115W
Gas Connection
• 1/8’’ Swagelok tube connector
Flow Rate
• 200 - 300 cc (25-40 scfm) per minute, governed by internal pump
Environmental
• 0–50°C (32-120°F) ambient temperature
• 0–45°C (32-110°F) ambient temperature when CO2sensor fitted
Weight
• 4.5 kg (10 lbs)
Dimensions
• 265mm x 158mm x 268mm. (9.91” x 6.22” x 10.55”)
Range of Output 1
• Field selectable from the following:
Output Selection Range
Linear oxygen 0–0.1% oxygen to 0–100.0% oxygen
0–1000ppm oxygen to 0–1,000,000ppm oxygen
Low Range Linear oxygen 0–0.001% oxygen to 0–1.0% oxygen
0–10ppm oxygen to 0–10,000ppm oxygen
Range of Output 2
• Field selectable from the following:
Output Selection Zero Range Span Range
• Carbon Dioxide, 0–90% 10–100% Min span 10%
• Reducing Oxygen 10-1–10-10 % 10-1–10-30 %
In one decade steps. Min span three decades
• Oxygen sensor EMF 0–1100 mV 1000–1300 mV
In 100 mV steps In 100 mV steps
• Sample Oxygen 0–0.1% 0.01–20% Min Span 0.01%
0–1000 ppm 100–20,000 ppm Min span 100 ppm
• Low oxygen 0–99.9% 0.1–100% oxygen Min span 0.1%
0-999,000 ppm 1,000-1,000,000 ppm Min span 1,000ppm
• Logarithmic Oxygen 0.1% O2Fixed 20% O2Fixed
Range of Indication, Upper Line
• Oxygen selectable either % O2or ppm, and Carbon Dioxide
• Oxygen, auto ranging from 0.1 ppm to 100% O2 (always ppm below 0.1% oxygen if selected as % O2in set-up
#27)
• Carbon Dioxide, 0.1 to 100.0%
Page 8Teledyne Analytical Instruments 9070 Oxygen Analyzer

Indication Choice, Lower Line
Any or all of the following can be selected for lower line display:
Options:
• Oxygen Sensor EMF
• Oxygen Sensor Temperature
• Oxygen Sensor Impedance
• Sample Oxygen/Carbon Dioxide
• Ambient Temperature
• Ambient relative humidity
• Balance gas (Remaining gas after the O2and CO2have been subtracted)
• Date - time
• Run Hours since last service
• Date of last service
Relay Contacts
0.5A 24 VAC, 1A 36 VDC•
Mounting
• Desk top. Also available as a surface mount Analyzer with an external oxygen sensor.
1.3 ORDERING INFORMATION
Orders may be placed by submitting the following information (please number each item as below):
1. State if carbon dioxide measurement is required.
2. Minimum and maximum expected oxygen in sample (particularly the minimum value)
3. Other gas constituents (Any combustibles will consume oxygen as they are burnt on the surface of
the sensor)
4. If the gas is under pressure or if the gas must be extracted to the 9070 Analyzer.
5. Gas connection required (1/8’’ Swagelok is standard)
6. Supply voltage (240 or 110 VAC)
7. If auto/manual on-line oxygen gas calibration checking is required.
8. If surface mounting of the instrument is required or if free standing on
rubber feet is preferred.
Ask your local Teledyne Analytical InstrumentsDistributor for assistance in ordering
1.4 MODEL SELECTION GUIDE
There are 3 options/models available within the 9070 range.
9070-1 Oxygen sensor only, with pump.
9070-2 Oxygen sensor only, no pump.
9070-5 Oxygen sensor and carbon dioxide sensor, with pump.
Teledyne Analytical Instruments 9070 Oxygen Analyzer Page 9

2 DESCRIPTION
SECTION
NUMBER
2.1 THE ZIRCONIA SENSOR
2.2 THE OXYGEN SENSOR ASSEMBLY
2.3 THE CARBON DIOXIDE SENSOR ASSEMBLY
2.4 THE ANALYZER
2.5 ALARMS
2.6 HEATER SUPPLY FOR THE OXYGEN SENSOR
2.7 THE OXYGEN SENSOR IMPEDANCE
2.8 AUTO CALIBRATION—ELECTRONICS
2.9 AUTO CALIBRATION CHECKING—OXYGEN SENSOR
2.10 AUTO CALIBRATION CHECKING—CARBON DIOXIDE SENSOR
2.11 RS 485/232C PORTS
2.12 AMBIENT TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENTS
2.13 WATCHDOG TIMER
2.14 BACK UP BATTERY
Page 10 Teledyne Analytical Instruments 9070 Oxygen Analyzer