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Sierra Monitor Corporation T10008 - page 1
INSTRUCTION MANUAL OXYGEN DEFICIENCY MONITOR (Model 55) T10008 Rev A1 ...
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OXYGEN DEFICIENCY MONITOR PAGE 1 TABLE OF CONTENTS 1. Introduction .................................................................................................... 1 2. Features ......................................................................................................... 2 3. Mechanical Description .................................. ...
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OXYGEN DEFICIENCY MONITOR PAGE 1 1. Introduction 1.1 The SMC Model 55 is a portable oxygen efficiency monitor for personnel in confined work pla ces. It is self-contained, light weight and battery operat ed. It does not require any adjustments by the user other than routine cali brations. The monitor re ads true percent oxygen in the presence of an ...
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OXYGEN DEFICIENCY MONITOR PAGE 2 2. Features 2.1 Features of the Model 55 include: • Temperature Stable • Barometric Pressure Insensitive • Large LCD digital display • High accuracy over temperature range 0-50 o C • Fast response -90% full scale in 10 seconds • Visual Alarm – LED provided on top of case • External Earphone for noisy ...
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Sierra Monitor Corporation T10008 - page 5
OXYGEN DEFICIENCY MONITOR PAGE 3 3. Mechanical Description 3.1 The Model 55 is housed i n a rugged, high impact en closre. The sliding ON/OFF power switch is located on the left side, the calibration potentiometer is acce ssible on the ri ght side and the digital display is on the fro nt surface. The top of the monitor and the digital display is on ...
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Sierra Monitor Corporation T10008 - page 6
OXYGEN DEFICIENCY MONITOR PAGE 4 4. Alarms 4.1 LOW OXYGE N CODITION: When the % oxygen fall s below 19.5 (factory set) the digital display will be augmented by an audi ble alarm when using either int ernal or external sensor. The red LE D will also truno on to provide visual indicat ion. If an earphone is in use the alarm will only sou nd through t ...
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OXYGEN DEFICIENCY MONITOR PAGE 5 Figure 1 ...
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Sierra Monitor Corporation T10008 - page 8
OXYGEN DEFICIENCY MONITOR PAGE 6 5. Operation 5.1 Turn the ON/OFF switch to “ON” po sition. 5.2 Display reads percent oxygen. 5.3 If the alarm sounds the percentage oxygen has d ropped below the present alarm lever (factory se t to 19.5%). The alarm will turn off automatically when the oxygen concentration ri ses above the alarm level. 5.4 If t ...
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Sierra Monitor Corporation T10008 - page 9
OXYGEN DEFICIENCY MONITOR PAGE 7 6. Calibration NOTE: This instruction assumes that o nly the internal sensor is in use (external probe disconnected). See opti on instructio ns for calibration of external probe. 6.1 Turn the monitor “ON” and place it in an enviro nment containing 20.9% oxygen and 79.1% nitrogen. This can be supplied from a cali ...
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Sierra Monitor Corporation T10008 - page 10
OXYGEN DEFICIENCY MONITOR PAGE 8 7. Sensor Replacement 7.1 Sensors for the Model 55 are provided in a seale d bag to prevent depletion of the electrolyte pr ior to required u se. Sensor depletion begins when the bad seal is br oke n. 7.2 Remove the four screws from the rear of the monitor and open the case. 7.3 Remove the sensor from the clamp i n ...
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Sierra Monitor Corporation T10008 - page 11
OXYGEN DEFICIENCY MONITOR PAGE 9 FIGURE 2 Sensor Installation ...
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Sierra Monitor Corporation T10008 - page 12
OXYGEN DEFICIENCY MONITOR PAGE 10 8. Battery Replacement 8.1 When the “BAT” indicator is displaye d approximately 8 hours of battery life remain. 8.2 Slide off the battery cover loca ted on the lower rear of the unit. Remove the battery and disconnect. 8.3 Connect a new battery and ca refully install it in the compartment taking care to stow th ...
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Sierra Monitor Corporation T10008 - page 13
OXYGEN DEFICIENCY MONITOR PAGE 11 9. Remote Sensor Option 9.1 Use the remote sensor option to check the confined environment before entry. 9.2 Plug the probe into the top of the monitor and loop the cabl e securely around the belt clip. Wh en the remote probe is plu gged in the internal sensor is disabled and the displ ay reads the remote pro be co ...
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Sierra Monitor Corporation T10008 - page 14
OXYGEN DEFICIENCY MONITOR PAGE 12 10. NOTICE The enclosed replacement sens or for your Model 55 Pers onal Oxygen Monitor is an enhanced version which will provide twice the operating life compared to sens ors shipped prior to September, 2004. The enclosed sensor will operate for t wo years. To insure maximum life of your new sensor, please perform ...
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Sierra Monitor Corporation T10008 - page 15
OXYGEN DEFICIENCY MONITOR PAGE 13 11. Specifications SENSOR OXYMAX™ oxygen concentration transducer. DISPLAY 3 digit LCD, %0 2 in air from 0% to 25.0% with low battery indicator. ACCURACY + 3% of full scale from 10 to 50 o C + 4% of full scale from 0 to 50 o C RESPONSE 10 seconds to 90% indication RESOLUTION 0.1% Oxygen SENSOR LIFE 21 months in a ...
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Sierra Monitor Corporation T10008 - page 16
OXYGEN DEFICIENCY MONITOR PAGE 14 CONTROLS ON/OFF switch. CALIBRATION ADJUSTMENT Calibrate both internal and external sensors against dry 0 2 /N 2. Both calibration adjustment s are with jeweler screwdriver. ALARAMS Audible: Factory set to alarm below 19.5% 0 2. Visual: LED lights when Audible Alarm sounds. CONNECTIONS Alarm earphone jack. External ...
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Sierra Monitor Corporation T10008 - page 17
OXYGEN DEFICIENCY MONITOR PAGE 15 WEIGHT 11 Oz. (0.3 Kg) INTERFERING GASES Ozone, chlorine and other highly oxidizing gases will interfere to the extent of their oxygen equivalent. Highly corrosive atmosphere will cause premature failure. CASE Three-piece, molded of high impact plastic. ...
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Sierra Monitor Corporation T10008 - page 18
OXYGEN DEFICIENCY MONITOR PAGE 16 12. Limited Warranty SIERRA MONITOR CORPORATION warrants its produ cts to be free from defects in workmanship or material under normal use and service for tw o years after date of shipment. SMC w ill repair or replace without charge any equipment found to be defective during the warranty period. Final determination ...
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Sierra Monitor Corporation T10008 - page 19
OXYGEN DEFICIENCY MONITOR PAGE 17 13. NOTICE – New 2-year Oxygen Sensor Thank you for your order for a SPC21111 Ox ygen Sensor Assembly for your Model 55 Pe rsonal Oxygen Monitor. In this shipment you will find the new Sierra Monitor 2-y ear Oxygen sensor for your Model 55 Personal Oxygen Monitor. Thi s enhan ced v ersion will provide twice the o ...
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Sierra Monitor Corporation T10008 - page 20
OXYGEN DEFICIENCY MONITOR PAGE 18 WARRANTY REGISTRATION SERIAL # Model 55 Oxygen Deficiency Monitor Name: Company: Address: City/State /Zip: Phone: I am also intere sted in the following Sierra M onitor Product s: Remote Probe for my Model 55 Oxygen Monitor Spare parts for Model 55 Sentry – Fixed installation monitor for Combustible, Oxygen, and ...
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