Page 2 - TABLE OF CONTENTS
OXYGEN DEFICIENCY MONITOR PAGE 1 TABLE OF CONTENTS 1. Introduction .................................................................................................... 1 2. Features ......................................................................................................... 2 3. Mechani...
Page 3 - The SMC Model 55 is a portable oxygen efficiency monitor for
OXYGEN DEFICIENCY MONITOR PAGE 1 1. Introduction 1.1 The SMC Model 55 is a portable oxygen efficiency monitor for personnel in confined work places. It is self-contained, light weight and battery operated. It does not require any adjustments by the user other than routine calibrations. The monitor r...
Page 5 - Description; The Model 55 is housed in a rugged, high impact enclosre. The
OXYGEN DEFICIENCY MONITOR PAGE 3 3. Mechanical Description 3.1 The Model 55 is housed in a rugged, high impact enclosre. The sliding ON/OFF power switch is located on the left side, the calibration potentiometer is accessible on the right side and the digital display is on the front surface. The top...
Page 6 - LOW BATTERY VOLTAGE: When the battery voltage falls below
OXYGEN DEFICIENCY MONITOR PAGE 4 4. Alarms 4.1 LOW OXYGEN CODITION: When the % oxygen falls below 19.5 (factory set) the digital display will be augmented by an audible alarm when using either internal or external sensor. The red LED will also truno on to provide visual indication. If an earphone is...
Page 7 - Figure 1
Page 8 - If the alarm sounds the percentage oxygen has dropped below
OXYGEN DEFICIENCY MONITOR PAGE 6 5. Operation 5.1 Turn the ON/OFF switch to “ON” position. 5.2 Display reads percent oxygen. 5.3 If the alarm sounds the percentage oxygen has dropped below the present alarm lever (factory set to 19.5%). The alarm will turn off automatically when the oxygen concentra...
Page 9 - Turn the monitor “ON” and place it in an environment containing
OXYGEN DEFICIENCY MONITOR PAGE 7 6. Calibration NOTE: This instruction assumes that only the internal sensor is in use (external probe disconnected). See option instructions for calibration of external probe. 6.1 Turn the monitor “ON” and place it in an environment containing 20.9% oxygen and 79.1% ...
Page 10 - Replacement
OXYGEN DEFICIENCY MONITOR PAGE 8 7. Sensor Replacement 7.1 Sensors for the Model 55 are provided in a sealed bag to prevent depletion of the electrolyte prior to required use. Sensor depletion begins when the bad seal is broken. 7.2 Remove the four screws from the rear of the monitor and open the ca...
Page 11 - FIGURE 2 Sensor Installation
OXYGEN DEFICIENCY MONITOR PAGE 9 FIGURE 2 Sensor Installation
Page 12 - Battery Replacement; When the “BAT” indicator is displayed approximately 8 hours of
OXYGEN DEFICIENCY MONITOR PAGE 10 8. Battery Replacement 8.1 When the “BAT” indicator is displayed approximately 8 hours of battery life remain. 8.2 Slide off the battery cover located on the lower rear of the unit. Remove the battery and disconnect. 8.3 Connect a new battery and carefully install i...
Page 13 - Remote Sensor Option; Use the remote sensor option to check the confined environment
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 cable securely around the belt clip. When the remote probe is plugged in the internal sensor is disab...
Page 17 - WEIGHT
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.
Page 18 - Warranty
OXYGEN DEFICIENCY MONITOR PAGE 16 12. Limited Warranty SIERRA MONITOR CORPORATION warrants its products to be free from defects in workmanship or material under normal use and service for two years after date of shipment. SMC will repair or replace without charge any equipment found to be defective ...
Page 19 - NOTICE – New 2-year Oxygen Sensor
OXYGEN DEFICIENCY MONITOR PAGE 17 13. NOTICE – New 2-year Oxygen Sensor Thank you for your order for a SPC21111 Oxygen Sensor Assembly for your Model 55 Personal Oxygen Monitor. In this shipment you will find the new Sierra Monitor 2-year Oxygen sensor for your Model 55 Personal Oxygen Monitor. This...