AMI 201LC User manual

AMI
Oxygen Analyzer Manual
Model 201LC
AMI, Costa Mesa, CA

AMI Analyzer Manual Contents •
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Contents
Preface 1
The AMI story 1
Caution 1
Address 1
Model 201LC Series Oxygen Analyzer 2
Introduction 2
Features: 2
Oxygen sensor: 3
Sensor Warranty: 3
Instrument Warranty: 3
Installation and Operation 4
Receiving the analyzer 4
Installation. 4
Location: 4
Connect gas and power lines: 5
Interconnections: 6
Alarm connections: 6
Output connections: 6
Serial connections: 6
Sample Handling: 7
Sensor Installation: 8
Operation 8
General Description: 8
Front Panel Controls: 8
Output Ranges 8
View Output Range 8
Change Output Range 9
Alarm Set Points 9
View Alarm Set Points 9
Change Alarm Set Points 9

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Alarm Hold Off 9
Calibration (Spanning) 9
Verify Span Factor: 11
Read the Temperature: 11
Alarm Functionality: 11
Maintenance and troubleshooting 12
Maintenance: 12
Periodic Calibration: 12
Sensor Replacement: 12
Sensor replacement cautions: 13
Sensor replacement procedure: 14
O rings 14
Troubleshooting 15
All oxygen applications 15
Specifications and Disclaimer 17
Specifications: 17
Disclaimer 17
Material safety data sheets (MSDS) 18
Sensor type P2, T1 18
Product Identification 18
Physical and chemical data 18
Fire and explosion hazard data 19
Reactivity data 19
Health hazard data 20
Emergency and first aid procedures 21
Handling information 21
Sensor type T2 22
Product Identification 22
Physical and chemical data 22
Physical hazards 23
Health hazard data 24
Emergency and first aid procedures 24
Handling information 25
Glossary of Terms 26
Index 28

AMI Analyzer Manual Preface •
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Preface
The AMI story
The AMI series of analyzers provide the latest in high-definition oxygen analysis. The series includes trace (ppm) and
percent models in several configurations. All of them share the same basic design approach, using AMI-manufactured
oxygen sensors and advanced high definition electronics for noise and interference free performance. Several aspects
of the design are the subject of patents, number 5,728,289 and 6,675,629; the sensors have a patent pending.
AMI specializes in oxygen analysis only , so as not to dilute its expertise by trying to cover too many other fields. As a
result AMI analyzers are more advanced and have more features than competitive models.
Every effort is made to ensure that AMI products provide reliable, effective performance. However there are many
pitfalls in achieving correct oxygen analysis, particularly at low ppm levels, and AMI stands ready to provide a
complete solution to the analysis problem, from sample system design to on-site troubleshooting and problem analysis.
Please feel free to call AMI for help should your results not meet your expectations.
Caution
Read and understand this manual fully before attempting to use the instrument. In particular understand the hazards
associated with using flammable or poisonous gases, and associated with the contents of the sensor used.
Address
Advanced Micro Instruments
225 Paularino Avenue
Costa Mesa, CA 92626
[phone]
www.AMIO2.com
Last Revised: 08/31/2018

AMI Analyzer Manual Model 201LC Series Oxygen Analyzer •
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Model 201LC Series Oxygen Analyzer
Introduction
The Advanced Micro Instrument Oxygen Analyzer Model 201LC provides the latest in low-cost high precision oxygen
measurement.
This manual covers software version 1.0.
Features:
•Compact size
•Unique patented cell block
•Auto-ranging display with user-selectable output
range
•Front panel sensor access
•Optional air or span gas calibration, no zero gases
required
•Virtually unaffected by hydrocarbons or other
oxidizable gases
•High accuracy and fast response
•Large liquid crystal display
•Backed by a two year warranty (excluding sensor)
•Standard isolated 4-20mA output
•Two fully adjustable alarm relay contact closures
24VDC/230VAC 5A.

AMI Analyzer Manual Model 201LC Series Oxygen Analyzer •
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Oxygen sensor:
AMI manufactures its own electrochemical sensor. It measures the concentration of oxygen in a gas stream, using an
oxygen specific chemistry. It generates an output current in proportion to the amount of oxygen present, and has zero
output in the absence of oxygen, thus avoiding any requirement to zero the analyzer. The cell is linear throughout its
range. The span calibration may be performed using standard span gases or ambient air. Unlike competitive sensors,
the AMI sensor is made using a high capacity metallic body that provides long life with about twice the active
ingredients of conventional sensors, but without compromised come-down time.
Sensor Warranty:
The sensor is warranted to operate for a period determined by its class. If the sensor ceases to operate correctly before
this time has elapsed, contact AMI for a return authorization for evaluation. If there is any evidence of defective
material or workmanship the sensor will be replaced free of charge.
NOTE: Any evidence of abuse or physical damage, such as a torn membrane, will void the warranty.
Instrument Warranty:
Any failure of material or workmanship will be repaired free of charge for a period of two years from the original
purchase (shipping date) of the instrument. AMI will also pay for one way shipment (back to the user).
This warranty does not cover the sensor, which is covered by its own warranty (see above).
Any indication of abuse or tampering will void the warranty.

AMI Analyzer Manual Installation and Operation •
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Installation and Operation
Receiving the analyzer
When you receive the instrument, check the package for evidence of damage and if any is found, contact the shipper.
Do not install the sensor until the analyzer is completely installed, the gas lines are plumbed and the electrical
connections are all made; and sample or a suitable low oxygen level gas such as nitrogen or a low level span gas is
ready to flow into it.
Installation.
Location:
The unit is designed to be mounted in a panel in a general purpose area. It should be mounted at a suitable viewing
level. Refer to the drawing (figure 1) showing the analyzer dimensions. It is not suitable for use in a hazardous area or
with flammable gases.
Although the unit is RFI protected, do not to mount it close to sources of electrical interference such as large
transformers, motor start contactors, relays etc. Also avoid subjecting it to significant vibration.

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Figure 1. Outline and Cut Out Drawing
Connect gas and power lines:
Do not install the sensor until the gas lines have been connected and the electrical connections made.
Install the unit, and connect the sample gas lines, power and appropriate alarm and output connections. Connect the
sample gas line to the fitting on the rear panel using the ¼” compression fittings provided, and the exhaust line to a
suitable vent.
Sample gas:
The sample gas inlet pressure should be between 1-40psig.
Span gas:
Span gas (if desired) must be provided by a user-supplied valve.
Exhaust:
The exhaust line may be left open, or vented to a suitable vent. If used with a scavenging system, use a large diameter
pipe (for example, ½” pipe) as the input to the scavenging system, and allow the ¼” vent to terminate a little way
inside this larger line without sealing it. The scavenging system will then draw in room air along with the sample,
while leaving the exhaust at atmospheric pressure.
Power connections:
The 201LC is designed to be operated from a 24V power supply only. Use a suitable wall adapter, or other kind of
stable DC power supply. Make sure the ground is connected to a real ground – otherwise you may experience
8.60
3.005.05
9.00
7.92
4.81
Ø0.21
X 4
Analyzer case outline (dashed) Cut out Front panel outline

AMI Analyzer Manual Installation and Operation •
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excessive noise and RFI interference.
Interconnections:
Figure 2. Back panel of the 201LC.
Alarm connections:
The alarm connections are single pole double throw relays, i.e. Form C contacts. They are normally preset to operate
as high alarms, failsafe, with no alarm delay, though they can be supplied with other settings. By failsafe is meant that
the relays are powered when NOT in alarm, so that if power fails, they indicate an alarm condition. The contacts can
handle AC or DC voltages, and can carry up to 5A of current for a resistive load. Inductive loads such as solenoid
valves should be “snubbed” – we suggest that you connect diodes or Zener diodes or “Transzorbs” directly across them
to absorb the inductive spike. Do not connect them across the relay terminals on the analyzer, since the resultant
current loop will transmit a lot of RFI that could upset sensitive devices nearby.
Output connections:
This unit is equipped with an isolated 4-20mA output. It is capable of driving a 600 Ohm load and will saturate at
more than 125% of the nominal full scale range.
Serial connections:
No serial connection is provided on this analyzer.

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Sample Handling:
Figure 3 Flow Schematic of the 201LC
The analyzer expects to get a sample of gas at a pressure between 1 and 40psig. A built-in needle valve and flowmeter
allow the user to control flow to 1SCFH with any pressure within this range. Higher pressure applications, or varying
pressure applications, will need a regulator to control pressure. The analyzer is not sensitive to flow changes between
about 0.2SCFH and 5 SCFH, but it is sensitive to back pressure changes (changes in exhaust pressure).
The flowmeter is mounted on the exhaust so that the oxygen reading is not affected by potential leaks around the
flowmeter tube.
Sensor
Flow
Meter
Needle
Valve Cell block
2001LC
Sample
Exhaust

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Sensor Installation:
The sensor is supplied sealed in a barrier bag. When you are ready to place it in the analyzer, open the bag and rapidly
place the sensor in its compartment, sensing side down. If desired, rapidly calibrate it on air, and then flow a low
oxygen level gas over the sensor until it has come down to its operating range
Operation
General Description:
This series of analyzers is designed to be as simple to operate as possible. The analyzer displays the oxygen level in
appropriate units on the LCD, automatically adjusting its sensitivity as required. Meanwhile the analog output and the
alarms are set on a single (user selectable) range.
For example, you can set the analog output to correspond to 0-1%, and the alarms to be say 0.4% and 0.5% (i.e. 40%
and 50% of range), activating above set point. If the oxygen level actually is 0.25%, the display will show 0.25%, and
the output signal will be at 25% of full scale. If the oxygen level becomes 2%, the display will show 2.00%, but the 4-
20mA output will be saturated, and the alarms will both be activated.
If you now manually change the output range to 0-10%, the reading will stay at 2.00%, the 4-20mAoutput will go to
20% of scale, and the alarms will de-activate, since they now correspond to 4.0% and 5.0%, i.e. still 40% and 50% of
range.
The analyzer uses a very high definition ADC to measure the oxygen signal as well as a temperature signal. Since it is
so precise, it measures the full range of oxygen values with no gain change required.
Front Panel Controls:
The controls all work the same way. You press the function you want for a second, and let go, and the display will
show the value corresponding to that function, for about 3 seconds. For example, if you press the OUTPUT RANGE
button for a second, the display will show the full scale output range. You can change this value (if the security setting
allows) by then pressing the UP or DOWN arrow button within about three seconds. You can either press this once for
a small change, or you can hold it down , in which case the number will change slowly at first, and then faster. If you
overshoot your target, press the other button to go back, and the display will again start moving slowly. If you release
any of the buttons, or don’t press the UP or DOWN buttons for three seconds, the unit will cycle back into normal
operation and store the new value.
Output Ranges
The output range is the range to which the 4-20mA analog output signal and the alarm settings correspond.
Output ranges (optional) 0-1000ppm, (optional)0-5000ppm, 0-1%, 0-5%, 0-25%, (optional) 0-100%
View Output Range
Press the OUTPUT RANGE button on the front panel for a second, and let go. The display will show the full scale
value of the output range for about three seconds, and then change back to the oxygen reading. According to the option
programmed into the unit, it will display the percentage output ranges allowed as shown above.

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Change Output Range
Press the OUTPUT RANGE button for a second and let go. While the output range value is displayed (you have
approximately three seconds), press the UP or DOWN arrow buttons to change it. The output range will change to
whatever you want. Simply leave it or select another function and the range will be stored and the system updated.
You will note that if this results in an alarm change, the alarms will change as soon as the unit starts showing the
reading again. If the output range does not change, the security level must be set to full or span only security. In this
case change the security level with the laptop and the AMI User Interface program.
Alarm Set Points
The alarm set points can be viewed and changed from the front panel.
View Alarm Set Points
Press either of the ALARM SET POINT buttons and let go. The alarm set point will be displayed for about 3 seconds,
and the then the display will revert to the oxygen reading. The set point shown relates to the current output range. If
you change the output range, the alarm set point will change to a new value which is the same percentage of the new
output range. For example, if the output range is 100ppm, you can set an alarm set point to be half way up, i.e. 50ppm
of oxygen. If you then change the output range to 500ppm, the alarm set point will remain half way up the new range,
and be displayed as 250ppm.
Change Alarm Set Points
Press one or the other ALARM SET POINT button for a second, and let go. While the alarm set point is showing, press
either the UP or DOWN arrow button and hold it until the value is what you want. The numbers will scroll slowly at
first and then speed up: if you press the other button, or release and re-press the one you are using, the number will
start going slowly again.
Alarm Hold Off
Press the ALARM HOLD OFF button for a second and release it. The display will show the alarm hold off time in
minutes, and if the analyzer was indicating an alarm, it will be turned off and held off for the period of the alarm hold
off time. The alarm hold off time can be adjusted by pressing the UP or DOWN arrow buttons.
Calibration (Spanning)
The model 201LC may be calibrated using air as the span gas, or else using a lower level gas closer to the measurement
range. It is not necessary to zero the analyzer. Spanning is normally performed somewhere between once a month
and once every three months, depending on the level of accuracy required.
Do not attempt to span with a gas less than 20% of the range to be used, as the span errors multiply and your results
will be less accurate. Make sure that the flow rate of span gas is the same as that of the process gas, unless you use air
as the span gas by opening the cell compartment.
If the span gas value is such that it will cause the alarms to activate, press the ALARM button to preemptively silence
them. You may want to extend the alarm hold of time to cover the length of time you will be spanning!
AIR CALIBRATION
1. Shut down the sample gas flow, either by closing an external valve, or closing the internal flow valve.
2. Open the cell cap, and blow a little compressed air under the cell. Don’t use your breath as it contains less
than 20.9% oxygen!

AMI Analyzer Manual Installation and Operation •
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3. Press the span button momentarily, and adjust the reading up or down with the UP or DOWN arrows until it
reads 20.9%.
4. Close the cell cap, and flow zero or sample gas by opening the valve.
SPAN GAS CALIBRATION
1. Flow sample or zero gas through the unit until it is reading a value below the span gas value. If the sensor is
newly installed, allow the reading to come down to at least one tenth the span gas value; if it has been looking
at a sample gas of roughly the span gas value for more than a few hours, this step is unnecessary. The idea is
to make sure that any dissolved oxygen left in the sensor has had a chance to be depleted.
2. Using an external selection valve, introduce a span gas into the cell compartment. Flow it at 1SCFH, or at any
rate the same flow as the sample gas.
3. Allow the reading to stabilize. This will take only a minute or so, but you may want to leave it for five
minutes to be sure.
4. Press the SPAN button, and then adjust the reading with the UP or DOWN arrow until it says the same as the
marking on the tank.
5. After a few seconds, the SPAN flag will go off and the new calibration value will be stored.
6. Using the external valve, allow sample gas to flow again.

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Verify Span Factor:
The analyzer features a “Span Factor” display to help you determine the state of the sensor. As the sensor ages, its
output decreases gradually, and therefore the span factor has to be turned up during calibration to compensate.
Press and release the UP button while the unit is showing its reading to view the span factor. The factor corresponds to
the setting of a traditional ten turn span pot with a turns counter dial on it.
The setting should be between 300 and 600 for a new sensor. When you calibrate the analyzer, check this value before
and after the calibration. You should see that the value goes up slowly over the life of the sensor. When the value has
gotten up to 1000, the sensor has reached the end of its life and should be replaced. Also, if the value suddenly jumps,
it indicates that the sensor is getting close to the end of its life.
Read the Temperature:
Press the DOWN arrow button. The display will show the temperature of the cell block in degrees Fahrenheit. The
value is limited to 25F at the lowest, and about 120F at the highest. Values outside this range will damage the sensor
Alarm Functionality:
The model 201LC series has two alarms, with two associated relays. Normally, these are set to operate as high alarms
(they go into alarm if the oxygen level goes above the set point), and to close their associated relays upon alarm. Their
time delay is set to zero, and they do not latch (unless specifically requested otherwise). An Alarm state is indicated by
the word “ALARM” appearing on the display.
Using the analyzer front panel you can change the alarm set points, but you cannot change any of the other settings. If
you want them to operate below alarm set point, to latch, or to operate in a pulse mode, you have to order the analyzer
set up that way. In this case contact the factory.

AMI Analyzer Manual Maintenance and troubleshooting •
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Maintenance and troubleshooting
Maintenance:
The model 201LC is virtually maintenance free other than for periodic calibration and occasional sensor replacement.
Periodic Calibration:
The analyzer should be calibrated about once every month to obtain the best accuracy. The sensor typically declines in
sensitivity by about 1% per month, so a monthly calibration is usually satisfactory. Use in a particularly aggressive
environment may degrade the sensor faster: in this case calibrate more often.
Sensor Replacement:
This should be done based on the Span Factor feature, rather than as a response to a dead sensor. See the chart below
for recommended sensor replacement.
Sensor Part
number
Description Expected life
P2 4SEN03-1 0-50% Percent oxygen - inert gas 9 to 12 months
P3 4SEN04 0-25% Percent oxygen - CO2 background 9 to 12 months
P4 4SEN08 100% oxygen - inert impurity 6 to 9 months
Table 1. AMI percent sensor types

AMI Analyzer Manual Maintenance and troubleshooting •
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Sensor replacement cautions:
CAUTION: The sensor contains a caustic or acid liquid. If there is any sign of a
liquid in the cell compartment, do not allow it to come into contact with your
skin. If it does, immediately flush the affected area with water for a period of
at least 15 minutes. Refer to the Material Safety Data Sheet provided.
Dispose of leaking or used sensors in accordance with local regulations. Sensors
usually contain lead which is toxic, and should generally not be thrown into
ordinary trash. Refer to the MSDS to learn about potential hazards and
corrective actions in case of any accident.
Figure 4. Inserting sensor in cell block
Sensor
Membrane
Down
O ring
TAB
Sensor
Electrodes
Cell block
Electrodes
Cell block front

AMI Analyzer Manual Maintenance and troubleshooting •
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Sensor replacement procedure:
The sensor is provided in a special sealed bag. Do not open this until you are immediately about to install the sensor.
Before installing sensor, make sure the power is ON.
1. Press the ALARM ACKNOWLEDGE.
2. Turn the gas flow down to zero on the flowmeter.
3. Unscrew the cell block cap, being careful not to lose the O ring.
4. Carefully remove old cell by pulling the tab on the label.
5. Inspect the cell block cavity, and if any sign of moisture clean it out with a Q tip or similar. Make sure that the
contact springs inside the block are intact. Be careful not to snag them with the Q tip.
6. Verify that the sealing O ring is in place in the cell cap groove. Verify that the O ring and the cap are clean and
free of any particulate deposits (such as dirt).
7. Carefully open the bag using a pair of scissors or a knife. Make sure you don’t cut yourself or stab the sensor! In
the rare event that the sensor has leaked there will be liquid in the bag. If so do not proceed - you need a new
sensor. Be careful that you don’t poke anything such as a fingernail through the membrane.
8. Don’t pull out the shorting tab yet!
9. Holding the sensor by its tab, membrane side down, slide it into the cell block (gold plated contact side of sensor
should be facing up touching the cell block contacts. Make sure the tab is pointing towards the outside so you can
pull it out!
10. When the sensor is pushed in all the way, pull out the shorting tab.
11. Let the reading stabilize and adjust it after a minute to 20.9%.
12. Turn up the flow of zero (or sample) gas.
13. Carefully replace the cap, making sure that you do not cross thread it, and tighten firmly by hand. Do not over-
tighten.
14. Make sure the zero or sample gas flow is set to 1 SCFH.
15. Let the reading come down to a low level, and then if desired, calibrate it using a span gas.
O rings
The O rings used are all Buna N type. Replacements are available from AMI . The following lists all the O rings used
in the model 201LC Series.
Position O ring number
Cell cap 1ORG01
Flow meter seal 1ORG07

AMI Analyzer Manual Maintenance and troubleshooting •
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Troubleshooting
All oxygen applications
Analyzer does not power up.
1. Check that the power is connected correctly, and the switch on the power entry module is on.
2. Check that the power supply voltage is 24VDC only.
Analyzer reads too low
1. Sensor is not calibrated. Flow span gas through it and span the analyzer until the analyzer reads appropriately.
2. If you cannot adjust the span enough to accomplish this, replace the sensor.
3. If the new sensor still reads too low, check its calibration with air and read the span gas - the span gas may be
incorrect.
4. If the sensor seems to die quickly, it may be getting poisoned by acid or sulfur bearing gases such as H2S. These
should be scrubbed from the sample stream by a scrubber.
5. Verify that the cell block connectors are in fact making contact with the cell. Clean them gently with a Q tip, and
bend them slightly straighter so that they make a good contact. Once this is done the cell should have some
resistance to being removed from the block.
Analyzer reads too high
1. Verify that there is no flow restriction in the vent line of the analyzer.
2. Increase the flow rate through analyzer by increasing the sample pressure - if the reading goes down it indicates a
leak in the incoming sample line or the cell block. Use “Snoop” or equivalent to check all the fittings back to the
gas source.
3. Leak test all external fittings with “Snoop” soap solution or equivalent.
4. Verify that the gas flow rate is correct. (0.1 to 2 SCFH)
5. Oxygen diffusion can be a serious problem. Verify that no plastic tubing or other plastic components are used in a
trace gas system, including diaphragms of pressure regulators, packing of valves etc. For percent applications,
similar problems may be experienced with silicone tubing. Use Teflonor Tygonor similar high quality
tubing.
6. Verify the analyzer calibration using air as the span gas.
7. Flow zero gas through the analyzer for a while until the reading is stable: shut off the incoming flow with the
sample valve and then immediately seal the vent tightly with a tube plug or equivalent (don’t pressurize the cell!).
Monitor the reading and see if it increases significantly over a 5 minute period. Such an increase indicates a leak
in the cell block or internal sample system.
8. Remove the cell (and short it out!) and verify that the analyzer reads zero - if not, there is moisture or corrosion
between the sensor contacts in the cell block; clean the contacts and the area around them with isopropyl alcohol,
dry with dry compressed air or nitrogen, then replace the cap on the cell block again. Pressurize the system to no
more than 10 psig and leak check all the fittings and tubing including the sensor block penetrations such as the
sensor wire seals (nylon plugs and epoxy seals on the top of the cell block).
NOTE: Be careful not to get soap solution on the PC board!

AMI Analyzer Manual Maintenance and troubleshooting •
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Analyzer reads zero
1. Verify that the sensor is in the correct position, not upside down. If it is upside down, verify that the membrane
has not been punctured - i.e. there is no sign of electrolyte on the surface, and if not, put it back the right way up.
If you have left it this way for a while, it may take several hours to recover to a low reading.
2. Verify that the cell block contacts are touching the sensor. Pull the sensor tab, and the contact should hold the
sensor with a gentle force. If not, the contacts may be bent. If they have been bent too much, remove the sensor
and gently bend them back so that they can again make contact.
3. Make sure that the gold plated contact wires are clean. If not, gently clean them with a Q tip or an eraser. Do not
use an abrasive cleaner, as it will remove the gold plating.
4. Check the output of the sensor with a DVM configured to measure current. Connect its leads to the two gold rings
on the back of the sensor - the center is ground. The output should be around 150 to 750 micro Amps in air. This
will take a few minutes to stabilize as the sensor consumes oxygen dissolved in its electrolyte. Replace the sensor
if it does not read this amount. See sensor replacement instructions under Maintenance.
No voltage or current output to recording device
1. Verify that the output wires are properly stripped and connected.
2. Verify the connections on the output terminal block.
3. Verify that the output connections are not shorted all the way back to the recording device. Disconnect the wires
from the analyzer and use an ohmmeter to check for shorts or opens.
No output alarm indication
1. Verify the alarm set points are correct - press the appropriate switch on the front panel, and check the displayed
reading on the LCD for correct setting.
2. Verify that the connections on the terminal block are properly stripped and correct.
3. Verify that the output connections are not shorted all the way back to the recording device. Disconnect the wires
from the analyzer and use an ohmmeter to check for shorts or opens.
Incorrect readings
1. Verify that there are no leaks in the system.
2. Verify that the span gas bottle is correctly marked by comparing its reading when the analyzer has been spanned
on air to what it actually says.
3. If spanning on air, verify that the air source is free of water vapor (humid air will contain about 3% less oxygen
than expected, depending on temperature), and that bottle air does actually contain 20.9% oxygen. Manufactured
air often does not!
Still no correct operation
1. Call AMI at 714 848 5533, and ask for Technical assistance.
2. Or contact us by email at [e-mail].

AMI Analyzer Manual Specifications and Disclaimer •
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Specifications and Disclaimer
Specifications:
201LC Series Standard ranges:
0 – 1%, 0 – 5%, 0 – 10%, 0 –25%
Optional ranges (contact factory) 0-1000ppm, 0-5000ppm, 0-100%
Sensitivity: 0.5% of full scale
Repeatability: +/- 1% of full scale at constant temperature
Operating temperature: 5°C to +45°C (41°F to 113°F)
Humidity: < 95%, non-condensing
Operational conditions: Pollution degree 2, Installation category I I.
Drift: +/- 1% of full scale in 4 weeks at constant temperature (dependent on sensor)
Expected cell life: 9 months to 2 years.
Response times:
90% of full scale in less than 10 sec
Output: 4-20mA isolated.
Alarm contacts: 230/117VAC @ 5A, or 28VDC @ 5A, resistive
Power requirements: 24VDC <10W.
Absolute Maximum Power voltage 28VDC
Overall dimensions: 9” w x 95” h x 3” d
Mounting hole dimensions: 7.92” w x 4.81” h
Weight 5 lbs
Disclaimer
Although every effort has been made to assure that the AMI analyzers meet all their performance specifications, AMI
takes no responsibility for any losses incurred by reason of the failure of its analyzers or associated components. AMI’s
obligation is expressly limited to the analyzer itself.
The AMI analyzer is not designed as a primary safety device, that is to say it is not to be used as the primary means of
assuring personnel safety. In particular it is not designed to act as a medical instrument, monitoring breathing air for
correct oxygen concentration, and should not be used as such when it is the only safety device on the gas system.