This new microprocessor control module has a fully programmable system incorporating a clear 40 character x 4 line Liquid Crystal Display (LCD). The display allows alphanumeric messages to be displayed while the unit's intelligent control of the backlit illumination highlights critical safety issues to the operator.

The display shows current status of the gas and power supplies, exhaust fan and fume scrubber pump (if fitted) of the fume cupboard in the form of clearly legible messages on the LCD and also by means of a mimic Light Emitting Diode (LED) located on the graphic front panel.

Special attention has been given to the man-machine interface to the panel. The strategy is to keep the display uncluttered and use visual and audible queues when user response is needed. This design philosophy makes the operation of the device simple while still allowing sophisticated programming and diagnostics for the technically minded. Hence, inexperienced personnel or students are guided by the preplanned legible instructions while the experienced operators can choose any options and program the unit to suit their requirements.

The RS485 serial communication electrical standard was chosen in lieu of RS232 as it allows multiple devices to share a single multi-drop cable, even in electrically noisy environments and over extended distances. The RS485 multi-drop communication channel allows an external data terminal or computer to access the Dynasafe internal microprocessor, thus allowing remote control of the panel and retrieval of the status data of the fume cupboard. This allows the maximisation of the energy saving features, reporting to central data logging devices, access by building management systems, remote emergency shutdown or startup - in fact the versatility of this feature is bounded only by the user's imagination.

When used in conjunction with energy saving Syncroflow Sash System, this communication channel can provide the necessary information to ensure the most efficient use of energy. Outputs are provided allowing the monitoring of this feature on one or any number of fume cupboards.

Dynasafe MK3 System incorporates a remote airflow sensor and communication channel. This sensor monitors the fume cupboard air flow and reports on the screen any variation to the minimum flow rate. The sensor operates on the calorimetric principle and features built-in self diagnostics and error reporting. Trip point and calibration data can be down-loaded from the sensor and locally stored in its non-volatile memory, thus allowing the device to function as a stand-alone unit or in a continual reporting mode for enhanced safety.

Incorporated is a sequencer, which can allow the cupboard to be programmed to start up or stop several times a day for up to one year in advance. This feature is very desirable for experiments which may need pre-heating, or regular or repeatable experiments such as in a school environment.

An internal battery backup supply is contained within the module. On power failure, the device will automatically switch to an internal power source, thus allowing communications and alarm status to still function. In fact, the panel is fully functional for 30 minutes after the power failure. This feature is required for compliance with AS2243.8.  The internal battery is self-maintaining and does not require periodic replacement.

Full diagnostics and setup screens are provided for commissioning and testing of the fume cupboard. On powering up of the cupboard, the panel will perform a diagnostic program. It will report any failures along with a reprogrammable service contact phone number on the LCD display.

If an extraction failure or other emergency sequence, such as an over-temperature should arise, the program of the Dynasafe MK3 can automatically execute its emergency shut down sequence. It will isolate the gas and power, while allowing the exhaust fan to continue operating as required by AS2243.8, thus setting the cabinet into a safe mode. At the same time, the panel will activate an audible alarm with the offending item featured on the LCD. The back light of the display will also flash to enhance the urgency of the message.

An emergency isolation switch is included on the panel. In emergency situations the operator simply presses the switch and thereby isolates the power outlets in the fume cupboard.

This is reported on the screen and the alarms will be activated.