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Summary of Contents for AMI 221R
- Page 1 MODEL 221R OXYGEN DEFICIENCY MONITOR Operator Manual...
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Page 2: Table Of Contents
OPERATOR MANUAL Special Message from Advanced Micro Instruments (AMI): Thank you for purchasing this MODEL 221R for oxygen deficiency monitoring. This permanent mount analyzer is designed to alert you and your employees to unsafe oxygen levels within an enclosed area. The audible alarm and relay outputs activate when an oxygen-depleted or oxygen-rich environment is detected. -
Page 3: Analyzer Overview
ANALYZER OVERVIEW Mounting Hole (x 4) LCD Screen Analyzer Enclosure UP Arrow Button SILENCE Button SPAN Button DOWN Arrow Button (front view) Protective Earth Ground oxygen sensor location Electrical Access Plate Name Plate (right side view) (left side view) (bottom view) I/O Access for Communication I/O Access for Power AVAILABLE CONFIGURATIONS... -
Page 4: Method Of Measurement
METHOD OF MEASUREMENT: ZIRCONIUM OXIDE SENSORS The MODEL 221R utilizes zirconium oxide sensors, which provides reliable, accurate percent oxygen measurements for a general purpose environment. •These sensors have up to a 10-year product life. This eliminates the need to replace sensors every 6 months and the need to perform monthly calibrations, which drastically lowers maintenance costs. -
Page 5: Safety, Warnings & Cautions
WARNING You must follow all installation requirements and environmental conditions to avoid protection impairment. Do not mount the MODEL 221R analyzer in a hazardous area, where explosive gases may be present. The zirconium oxide sensor will ignite flammable gas mixtures. -
Page 6: Analyzer Installation
The MODEL 221R is designed for operation between 41°F to 104°F. CAUTION: The MODEL 221R is designed for monitoring of atmospheric air. Use of the unit to monitor process gas will shorten the life of the zirconium oxide sensor and void the warranty. - Page 7 OPTION 1: INSTALLATION WITH THE POWER CORD Place the Oxygen Deficiency Monitor at a desired location. It is recommended to position the unit at eye-level. Make sure the location is no more than 6 ft from an electrical outlet if the unit has the standard 6-ft cord.
- Page 8 Install a cable gland in the I/O Access for Power. The cable gland should be rated to NEMA 4X (IP65) at the minimum or NEMA 6 (IP68), which is recommended. A cable gland can be acquired from AMI as a separate...
- Page 9 Feed cable through the cable gland, which fits Cord OD of 0.24" to 0.47". Remove the 3-terminal green connector from the terminal strip for easier wiring. Make the following electrical connections to the proper positions on the Phoenix connector. – Connect the fused line side of a 90 —240 VAC power source to the H terminal –...
- Page 10 Install a cable gland to the I/O Access for Communication. The cable gland should be rated to NEMA 4X (IP65) at the minimum or NEMA 6 (IP68), which is recommended. A cable gland can be acquired from AMI as a separate purchase (Part # 1CON02).
- Page 11 Note: The RS485 cable, which has a length of ~ 6 ft (1.8 m), must be purchased separately from AMI (Part # 3DON01). To complete wiring for another connection, repeat Steps 12 & 13 and select a different connection to install the...
- Page 12 Put the Electrical Access Plate back in place and secure. Earth Ground Connect the shield ground to a good earth ground or equivalent. Turn on the mains power.
- Page 13 INSTALLATION WITH REMOTE PROBE (OPTIONAL) PROBE & BRACKET ENGINEERING DRAWING Customers that ordered the MODEL 221R with Remote Probe can mount the Probe using the included bracket as shown above. Note: The probe includes a 12-ft cable but can be ordered with a longer, optional length up to 300 ft. To extend the...
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Page 14: Analyzer Operation
ANALYZER OPERATION Front Panel Interface LCD Screen UP Arrow Button SILENCE Button LED indicator DOWN Arrow Button What are the Alarm Conditions and the LED Warnings? AUDIBLE INDICATION LED COLOR RELAYS ALARM Below 19.5% Oxygen Solid Red 95 dB ON Relay 1 de-energized, Relay 2 de-energized DANGER Level Warning Light... - Page 15 The MODEL 221R has a battery back-up. If the AC power fails, the internal batteries will keep the unit operational for about 1 hour. During this time, the LED backlight on the LCD panel will flash, and the status LED will turn red and flash.
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Page 16: Analyzer Calibration
Verify that the Oxygen Deficiency Monitor is reading 20.9%. If not, press the SPAN button and, within 3 seconds, use the UP or DOWN arrow buttons to adjust the LCD reading to 20.9%. Note: Unlike AMI's other Analyzers, the display on this unit WILL NOT blink when the SPAN button is pressed. - Page 17 REQUIRED COMPONENTS: • Certified oxygen span gas with a nitrogen background Note: AMI recommends a percent oxygen span gas between 10 to 20% with the balance being nitrogen. • Calibration adapter - Part Number 4BLK41 (sold separately by AMI) •...
- Page 18 'Block & Bleed' CALIBRATION STEPS Connect the Calibration Adapter to the MODEL 221R. Open the valve of the Span Gas Tank and adjust the regulator pressure to approximately 20 psig. Allow a brief moment for the measurment reading to stabilize.
- Page 19 The SPAN FACTOR of a new oxygen sensor is in the range of 400 to 600. After each calibration, the SPAN FACTOR will increase slightly. When the SPAN FACTOR reaches around 980, the sensor is nearing the end of its useful life. Contact AMI to return your unit for sensor replacement.
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Page 20: Sensor Replacement
The zirconium oxide sensor has a product life up to10 years. To replace the sensor near the end of its product life, contact AMI to make arrangements. The sensor can only be replaced on the MODEL 221R at our factory. -
Page 21: Analyzer Accessories
ANALYZER ACCESSORIES There are several accessories available for purchase for the MODEL 221R. Accessories Part Number Calibration Adapter 4BLK41 Cable Gland for I/O Access for Power, 1CON02 for Cord OD 0.24" to 0.47" RS485 cable with length ~ 6 ft (1.8 m) -
Page 22: Specifications
SPECIFICATIONS USAGE Both indoor and outdoor use Max Altitude _________________________________________________________________________ 15,000 ft Relative Humidity_____________________________Maximum relative humidity is 80% for temperatures up to 88°F, This maximum relative humidity decreases linearly to 50% relative humidity at 104°F. Ingress Protection____________________________________________________________Designed to meet IP44 Pollution degree: 2 (Only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation is to be expected). - Page 23 AREA CLASSIFICATION Area Classification ______________________________ Approved to meet General Purpose UL 61010-1 Standard and IP 65 Requirements. CE Marked OPTIONS Probe ________________________________________ Optional Remote Oxygen Sensing Probe (can be located up to 300 ft away from the control unit) POWER Requirements _________________________________________________________90-240VAC 50/60Hz (1 1W) Mains supply voltage fluctuations up to +/-10% of the nominal voltage Battery back-up _________________________________________________________________________1 hour...
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Page 24: Ami ® Warranty
DURATION TO TWO (2) YEARS FROM THE DATE OF DELIVERY. LIMITATION OF LIABILITY IN NO EVENT WILL AMI BE LIABLE TO YOU FOR ANY SPECIAL DAMAGES, INCLUDING ANY LOST PROFITS, LOST SAVINGS, OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF THE COMPANY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. - Page 25 PAGE INTENTIONALLY LEFT BLANK...
- Page 26 HIGH PERFORMANCE RELIABILITY INTUITIVE DESIGN www.amio2.com ADDRESS: Advanced Micro Instruments, Inc. 714.848.5533 225 Paularino Avenue 714.848.4545 Costa Mesa, CA 92626 Email sales@amio2.com OM-300-006 Rev D 01/12/2022 © Advanced Micro Instruments, Inc.
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