![]() ![]() An unbalanced airflow velocity will have an increased risk on an operator’s safety when working with infectious specimens. This type of alarm is pretty easy to manage and is the most common alarm that's triggered in a BSC. Here's how you should respond to each one: Sash High Alarm There are several different types of alarms on a BSC. There are serious consequences if the technician doesn't respond to the visual and audio alarms quickly and correctly, such as highly significant safety concerns and the loss of valuable substances and samples. ![]() ![]() But what if the operator still lacks guidance on what to do? The inside of the cabinet and the touchscreen control panel turn red, which should instantly alert the operator of the problem, regardless of where they are in the lab, meaning it can be resolved quickly and efficiently, which in turn helps to create a much safer working environment for all. But we've gone one better, with a warning system that's suitable for any lab technician working with these types of fume extraction units, including those with hearing difficulties. The traditional warning alarms you find on other units in the market are fine. That's why we've also integrated a red light warning system in our biosafety cabinets, fume cupboards and laminar flow cabinets. Example of a BSC Control Panel Red Light Warning System Current control panel interfaces are now much easier to understand. Here's an exampleĮarly versions of control panels on fume extraction units like BSCs were very basic, and engineers had to figure out how to do something. However, that's not always the case and the training provided can sometimes be inadequate. In modern times, laboratory equipment, like high tech electricals, is supposed to utilise intuitive features and be as user-friendly as possible. Otherwise, you're almost certain to make the situation worse.ĭespite the fact most biological safety cabinets come with best practices and a detailed set of instructions regarding how you should respond to alarms, not everyone has an interest in reading the manual, or even in some cases may not have access to it. That said, if the persistent commotion makes you flustered, you need to remember that you're working with highly infectious specimens or biohazardous materials and you need to keep a cool head. And in most situations, this approach wouldn't cause any real harm. ![]() This occurs when frames are repeated or deleted at the receiving terminal to compensate for clocking differences between the Carrier and the Terminal equipment.If an alarm was continuously going off and wouldn't stop ringing on your cabinet, what would you do? Was your instant response to just close the sash and hope this will solve the issue? Well, if that's what you thought, trust us, you're not on your own. When a FE error count is transmitted, the Severe-Error (SE) count is set to 0. This occurs when the equipment receives an incorrect or unexpected framing bit. When a Severe-Error is reported, the FE (Frame Bit Errors) count is set to 0. Also, 2 of 4, 2 of 5, or 3 of 5 errored framing bit criteria can be used to declare a Severe-Error (SE). This occurs when two or more framing bit errors are detected in any 3 mS window. This occurs when the CRC polynomial calculation performed before transmission does not match the CRC calculation done upon reception. Depending upon the equipment, this can occur when 2 of 4, 2 of 5, or 3 of 5 framing bits are in error. Occurs when the equipment senses errors in the incoming framing pattern. This alarm is a repetitive 16-bit pattern consisting of 8 "marks" (1) followed by 8 "spaces" (0) (11111111 00000000) and is transmitted for at least 1 second.Ī LOS condition occurs when no pulses have been detected in a 175 +/- 75 pulse window. When the equipment enters a Red-Alarm state, it returns a Yellow-Alarm back up the line of the received OOF. This alarm state is cleared when no OOF conditions occur for at least 1 second Occurs when the equipment detects a continuous OOF condition for 2.5 seconds. It is usually an indication of a physical layer problem. This AIS-Alarm consists of an unframed all ones signal sent to maintain transmission continuity. When a data path is broken the first downstream device to detect this LOS/OOF condition sends an AIS-Alarm on down the line (2.5 seconds of an OOF condition will also cause the device to go into Red-Alarm and send a Yellow-Alarm back up the line). The AIS is also known as a "All-Ones", "Blue-Alarm" or "Keep-Alive" signal. ![]()
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