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3350 - Control Room Oxygen Monitor for personnel safety
Our Model 3350 just started giving us problems... The problem you describe requires a little troubleshooting to determine the cause. Please check the power supply voltage to the control unit with AC power connected, and then with back-up battery only. Connect a volt meter across the + & - terminals on the back of the control unit and read the DC voltage: 1) With AC power cord connected, check for 15 volts DC 2) Disconnect the AC power cord, and check for 12 volts DC 3) Verify that all three fuses are OK. Those steps will verify that the battery charger/power supply circuit is OK, and the problem is therefore inside the control unit. Please advise if you want to send it back for repair, or continue troubleshooting to see which PC board needs to be replaced inside the control unit. Top of page What are the ideal air flow conditions for this instrument? Regarding the Models 335 and 3350, which are oxygen analyzers for monitoring O2 deficiency (to support human respiration), Teledyne does not offer the advice you are seeking. I would suggest you contact the Safety Officer for your company to determine air flow requirements with regards to the product's ability to warn people of an O2 deficient condition in the room you are monitoring. The sensor itself is not flow sensitive and is typically mounted in open air, which can be either flowing or still depending on the installation. But Teledyne does not offer advice relative to where the sensor should be placed in relationship to the people or how often the air should turn over in the environment to ensure a safe work environment. Top of page Is there a Preventive Maintenance Procedure for this device? This analyzer does not require much maintenance. The maintenance procedure as mentioned in the operating manual is sufficient like fuse replacement, Micro Fuel cell replacement/installation and ordering/handling of spare cell. Please just follow the manual for these. Apart from the above we can add some of the points during maintenance like:
Top of page Can I use the remote probe from a Model 335 in place of the one provided with my 3350? No, since the 3350 uses a different probe assembly this is not possible. The 3350 requires the thermistor to be wired back to the electronics portion. Cable Color code is Red (Sensor +), Black (Sensor -), White (Thermistor), Green (Thermistor), and Green/White (Shield). Top of page How do atmospheric conditions impact O2 sensor readings? Please refer to the following document: impact_of_atmospheric_conditions_on_O2_readings.pdf Top of page Can the remote O2 sensor be used in a dusty environment without issue? We have a room which has a low level of dusty particles in which we would like to mount the remote O2 sensor. Are there any issues with doing this that may affect the sensors performance? Over time the dust may prevent the flow of O2 to the sensor from ambient and cause a false low reading. That is possible. We have tested this but this is based on our understanding of the principle of operation of the sensor. However if the sensor is mounted so the sensing surface faces down then the dust would tend to settle on the part of the sensor that is not bothered by it. Top of page |
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Document Control & Training (password) e-mail us: ask_tai@teledyne.com Copyright © 2007 Teledyne Technologies Incorporated. All rights reserved. Teledyne Analytical Instruments • 16830 Chestnut St • City of Industry, CA 91748 • USA |
