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INTRODUCTION
All Biosystem Series refrigerators utilise the M265CE microprocessor based liquid nitrogen level controller.
The M265CE will perform the following functions.
*Level monitoring and automatic filling of refrigerators.
*Level display (High/Normal/Low).
Temperature monitoring and display.
Generation of local and remote alarms for:
High Temperature
Underfilled
Overfilled
Sensor faults
Failure of liquid nitrogen supply
Lid left open.
*Manual filling.
*Chart recorder output.
*Logging of temperature, levels, alarms, fill activity etc.
*Serial port for printer output of logged data.
*Self testing and isolation of sensor faults.
*Lid open detection.
*Simple “daisy chaining” of controllers for simultaneous filling in multiple installations.
*Automatic defogging on lid opening. n
*Fast temperature recovery on lid closure. (‘Quick Chill’). n
*Communication with PC for downloading of data.
n These functions will be disabled if a fill delay switch is fitted.
Fill delay switch will only be fitted if specifically requested where, for example, automatic venting of the
nitrogen supply pipework is incorporated to allow for gas produced during cool down to be prevented from
blowing through the Biosystem.
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