AMI 111 Manual de usuario
Made in the USA
AMI
Oxygen Analyzer Manual
Model 111/111P
AMI, Costa Mesa, CA
AMI Analyzer Manual Contents i
Contents
Preface 1
Thank You 1
Caution 1
Address 1
Model 111/111P Oxygen Analyzer 2
Introduction 2
Features: 2
Data logging: 3
Sample conditioning: 3
Safety: 4
Sensor Warranty: 4
Instrument Warranty: 4
Installation and Operation 5
Receiving the analyzer 5
Charge the batteries: 5
Location: 5
Sample gas and electrical connections : 6
Interconnections: 7
Digital communications: 7
Sample connection: 7
Operation 8
General Description: 8
Front Panel Controls: 8
Flow Rate Adjustment: 8
Front panel LED: 8
Calibration (25% unit): 9
Calibration (111 or 111P with optional 95% range): 9
A note on analyzer linearity: 10
Atmospheric pressure effects: 10
Communication program: 11
Top section: 12
Analyzer Info Section: 12
Analyzer Setup Section: 12
Sensor Calibration Data: 13
AMI Analyzer Manual Contents ii
Data Logging 13
Variables: 15
Maintenance and troubleshooting 16
Maintenance: 16
Sensor Replacement: 16
Battery Replacement: 16
Troubleshooting 17
Specifications and Disclaimer 19
Specifications: 19
Disclaimer 20
AMI Analyzer Manual Preface 1
Preface
Thank You
For purchasing a state of the art oxygen analyzer. The 111 series of analyzers provide unmatched accuracy,
reliability and longevity among percent level oxygen analyzers. They use an innovative zirconium oxide
sensor that is highly stable, and minimally responsive to pressure changes, thus making the analyzer one of
the few not to be affected by barometric pressure changes.
The standard model, called 111, is intended for positive pressure samples up to 100psig; the 111P adds a
pump that allows it to operate on low pressure and vacuum samples from plus 10psig to 15 inches of
mercury vacuum (7.5psia). Both analyzers are battery powered, but may be operated indefinitely from the
wall charger supplied. They are CE marked, meaning that they meet the European (and thus by default the
American) standards for EMI immunity and safety in a general purpose area. They are not designed for use
with flammable samples or in a hazardous area.
Oxygen analysis can be a problematical area for people with no experience in it – and AMI is always happy
to help you if you run into any problems. Please feel free to call at any time for help.
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.
Address
Advanced Micro Instruments.
225 Paularino Avenue
Costa Mesa, CA 92626
(714) 848-5533
www.AMIO2.com
The unit meets the requirements of EN 61326-1 2006 and EN 61010-1. It is therefore CE marked.
Last Revised: 08/31/2018
AMI Analyzer Manual Model 111/111P Oxygen Analyzer 2
Model 111/111P Oxygen Analyzer
Introduction
The Advanced Micro Instruments Model 111 and 111P provide the latest in high precision percentage
oxygen measurement in the range of 0.1% to 25% (or optionally, 50% and 95%). The Model 111 and 111P
incorporate a state of the art Zirconium Oxide sensor that provides unprecedented accuracy and stability,
while retaining the traditional AMI features and ease of use. The analyzers are portable and battery
powered, however the sensor uses quite a lot of power and so the battery life is shorter than that of wet
electrochemical analyzers, particularly if the pump is used. It has no analog output but instead records data
electronically for subsequent download to a PC.
Features:
Single measurement range; four datalog ranges selectable.
High resolution 3 ½ digit LCD
RFI protected
Data logger
USB virtual comport communication for advanced features
Power requirements: 115/230VAC to 12VDC battery charger
Low minimum detection limit 0.01% oxygen (25% version)
Excellent repeatability and stability
Extended operating temperature range to 130°F
Fast upscale/downscale response times
Long life sensor, 10 year life expectancy
Unaffected by changes in flow rate from 0.1 to 2.0 SCFH
Compact portable
Meets UL Requirements (EN 61326-1 2006 and EN 61010-1). CE Marked for European Use.
2 year warranty for analyzer parts and labor
2 year sensor warranty
AMI Analyzer Manual Model 111/111P Oxygen Analyzer 3
Data logging:
The unit contains a real-time clock and 32K of non-volatile memory that provide a data logging function to
be accessed by the AMI User Interface Program. It will automatically log readings and the time and date at
intervals for subsequent downloading into a computer.
It records the average reading over a user-selectable period (in minutes), and after every 32 readings it
records the time and date so that the user may reconstruct the data accurately. If logging is turned off, and
then restarted, it will continue logging where it left off (starting with a new time and date stamp) – it won’t
overwrite the earlier data until it reaches the end of its memory.
Using the User Interface program supplied by AMI, the data may be downloaded into a “CSV” file for
manipulation in Excel™ or similar spreadsheet programs, and the logging can be restarted at the beginning
again. The internal time and clock may also be set, as well as a label to distinguish data from this analyzer
from others.
As an example, if the time interval is set for 1 minute, the unit will average the readings for one minute and
then store the average. Every 32 minutes it will also store the current date and time. It will continue doing
this for about 20,000 data points, i.e. about two weeks, assuming it is left plugged in to its charger! After
that time it will start writing over its earliest data.
Sample conditioning:
The model 111 is intended to use a positive pressure sample. The sample should be free of liquids, and
dust. It must be free of combustible material, since the sensor will oxidize anything combustible, reducing
the oxygen reading by the amount it took to burn up the contaminant. It is intended to operate with
nitrogen as the background gas – high concentrations of other gases may be problematical, mostly because
any significant change in thermal conductivity will either overheat or cool off the sensor. Generally
speaking, up to 10% of any non-flammable gas is not a problem, but higher concentrations (other than
nitrogen) may be. Please contact the factory for details if this should apply to you.
The analyzer does not respond to barometric pressure changes, unlike conventional oxygen analyzers.
Optional versions are available that can measure oxygen up to 50% or 95%.
The model 111P is equipped with a long-life pump, capable of drawing a sample through the sensor from an
ambient pressure source, or vacuums down to 15”Hg. It will also operate at inlet pressures up to 10psig.
The pump does draw more current than the rest of the analyzer, so the battery life is considerably shorter if
you run the pump all the time; however like the standard unit it will operate indefinitely if plugged into its
charger.
Using the AMI user interface program, the unit can be programmed to switch off the pump after a few
minutes of operation, though by default it will run continuously. The LED on the front panel wi ll change
from green to blue when the pump is in use. If the batteries are low, the pump will only run for five
seconds. Sometimes when the batteries are getting low, the increased current draw of the pump will
AMI Analyzer Manual Model 111/111P Oxygen Analyzer 4
reduce the battery voltage and thus turn the pump off – in this case both the red and blue LED’s will come
on while the pump is running.
Safety:
A component of the sensor operates internally at a high temperature and will ignite any flammable gas
mixture it sees. Do not use this analyzer with flammable gases of any kind. (Note, the analyzer itself runs
at ambient temperature).
Oxygen sensor:
The Model 111’s Zirconium oxide sensor produces an output current in proportion to the amount of oxygen
present, and has virtually zero output in the absence of oxygen, thus avoiding any requirement to zero the
analyzer. The span calibration may be performed using a standard span gas or oil-free compressed air. The
sensor is so stable that span calibrations are only necessary once or twice a year. Unlike conventional
sensors, the sensor does not age when it is not powered.
WARNING
All zirconium oxide sensors operate at high temperature, and are unsuitable for
measuring flammable gases. Any hydrocarbon gas will oxidize on the sensor, reducing
the oxygen reading by the amount of oxygen required to burn the hydrocarbons. DO
NOT USE THIS ANALYZER WITH FLAMMABLE OR EXPLOSIVE SAMPLES!
Sensor Warranty:
The sensor is warranted to operate for at least two years, with an expected life between five and ten years.
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).
Any indication of abuse or tampering will void the warranty.
AMI Analyzer Manual Installation and Operation 5
Installation and Operation
Receiving the analyzer
When you receive the instrument, check the package for evidence of damage and if any is found, please
contact the shipper.
Charge the batteries:
Plug the wall adapter supplied into a suitable wall socket. The charger is a universal charger, and can b e
plugged into any voltage between 100 and 240 VAC. Plug the power jack into the back of the analyzer, and
allow it to sit overnight for at least 14 hours. The internal charging circuit will not allow the batteries to be
overcharged. The batteries in the model 111 will last for about 8 hours of continuous operation. In the
111P, they will last the same length of time if you don’t use the pump; the pump will drain them in about an
hour if you use it continuously. The unit is able to operate while the batteries are being charged. The
maximum voltage the power input can accept is 13VDC. Anything higher than this will damage the unit.
Location:
The unit is designed to be used in a general-purpose area. It is not suitable for use in a hazardous area or
with hazardous (explosive or flammable) gases. It may be operated either off its internal batteries or else
off the charger, in which case it will simultaneously operate and recharge itself.
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.
AMI Analyzer Manual Installation and Operation 6
Figure 1. Outline Drawing
Sample gas and electrical connections:
The sensor is built into the analyzer, and does not need any separate installation. It is equipped with ¼”
compression fittings on the inlet.
The exhaust should be left open, or if desired, brought through a low restriction tube such as ¼” diameter
plastic tubing to a safe area.
AMI Analyzer Manual Installation and Operation 7
The only electrical connection, other than the battery charger input, is a USB connector suitable for use
with a standard USB type A to type B cable (such as is often supplied with a PC printer).
The unit is powered by its internal batteries but may also be powered as well as recharged by plugging in
the power adapter supplied to the socket on the rear of the unit.
Interconnections:
Digital communications:
The Model 111/111P is equipped with a USB connector on the back of its case. This may be used to access
data that has been logged by the built-in data logger, as well all the other features of the analyzer. These
include the calibration settings, linearity settings, heater settings and internal voltages.
Use a standard USB cable and software supplied by AMI to configure and download data.
NOTE: THE COMPUTER USED MUST MEET UL STANDARDS FOR ELECTRICAL SAFETY!
Sample connection:
This unit is designed to be used with ¼” tubing supplied by the user. As an option AMI can supply a special
flexible tubing accessory that avoids damage to fittings. It uses O ring sealed hand removable fittings. See
the accessory page below. Attach it to the analyzer using a suitable fitting. Adjust the flow with the
flowmeter valve to approximately 1 SCFH. After one to two minutes (depending on flow rate) the reading
will stabilize.
For the standard unit (model 111), make sure the inlet pressure is between 0.5psig and 100psig.
For the pump version (model 111P), make sure the inlet pressure is between +10psig and about 15” Hg
vacuum. Higher vacuums than this may damage the pump.
If the unit is plugged into its charger, it will run indefinitely.
For best response time and repeatability, take the reading at 1SCFH.
The sensor responds only minimally to barometric pressure changes – about 0.4% of reading for a 5psi
pressure change (which is equivalent to a change in elevation of about 12,000 ft!).
Its output is slightly reduced by the presence of CO2 – substituting 1% CO2 for an equivalent amount of
nitrogen in a gas mixture (i.e. air) will change the reading from 20.9% to 20.85%. Water vapor will also
reduce the reading but merely by diluting the oxygen, not by affecting the sensor. Saturated air at 110F
contains about 3% water vapor, so the oxygen reading will be reduced by 3% of 20.9% i.e. to 20.3% oxygen.
Este manual sirve para los siguientes modelos
1
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