Programmable thermograph and computer system for time and temperature readout and stored documentation

A programmable In-Transit thermograph and system compatible with a personal computer PC for time and temperature readout and documentation of temperature during a limited time period, the thermograph including;

• a power supply means for low voltage direct current from an internal battery,
• a Driver Receiver with a PC connector and comprised of an operational amplifier means increasing the low thermograph data voltage to a higher PC data voltage in an outgoing data circuit from the thermograph and through said connector, and of a voltage reducer means decreasing the higher PC data voltage to the lower thermograph data voltage in an incoming data circuit from the PC and through said connector,
• a temperature sensor probe means for response to temperature and producing temperature related data,
• a microcontroller means having a Read Only Memory ROM means for programming with basic firmware including, a clock means for continuous running a Real Time Clock Calendar with time output data, and a default temperature recording means for continuous serial flow of clock means data and temperature sensor probe means data,
• a Random Access Memory RAM means for programming with software including, a time limited temperature recording means for recording for a limited time period and responsive to serial flow of clock means data and temperature sensor probe means data,
• an Electrical Erasable Programmable Read Only Memory EEPROM means for receiving and storing the time and temperature data from the clock means and from the temperature sensor probe means,
• a start means responsive to a reset switch for starting recording from the time limited recording means data and storing said data into the EEPROM,
• a time duration means responsive to a Time switch for ending recording of time and temperature data stored in the EEPROM from the time limited recording means data,
• and a readout means for the readout of the time limited recording means time and temperature data from the EEPROM, and alternately for the separate readout of the default recording means time and temperature data from the EEPROM,
• the Driver Receiver being powered by the PC through said connector, whereby the thermograph time and temperature stored data can be viewed and processed by the PC.

A programmable On-Site thermograph and system compatible with a personal computer PC for time and temperature readout and documentation of continued temperature recording during sequential time periods, the thermograph including;

• a power supply means for low voltage direct current from an internal battery,
• a Driver Receiver with a PC connector and comprised of an operational amplifier means increasing the low thermograph data voltage to a higher PC data voltage in an outgoing data circuit from the thermograph and through said connector, and of a voltage reducer means decreasing the higher PC data voltage to the lower thermograph data voltage in an incoming data circuit from the PC and through said connector,
• a temperature sensor probe means for response to temperature and producing temperature related data,
• a microcontroller means having a Read Only Memory ROM means for programming with basic firmware including, a clock means for continuous running a Real Time Clock Calendar with time output data, and a default temperature recording means for separate readouts of time and temperature sensor probe means data from the EEPROM,
• a Random Access Memory RAM means for programming with software including, a stop-start temperature recording means for stopping a preceeding time and temperature recording while simultaneously starting a subsequent time and temperature recording,
• an Electrical Erasable Programmable Read Only Memory EEPROM means for receiving and 'storing the time and temperature data from the clock means and from the temperature sensor probe means,
• a start means in the form of a reset switch for activating the stop-start temperature recording means and storing said preceeding time and temperature data in the EEPROM,
• a time readout means responsive to a Time switch for reading time data stored from the EEPROM,
• and a temperature readout means responsive to a toggle switch for activating a High-Low temperature display of the temperature data from the EEPROM, and alternately for dispalying current temperature data from the EEPROM,
• the Driver Receiver being powered by the PC through said connector, whereby the thermograph time and temperature stored data can be viewed and processed by the PC.