Bruker BVT3000 - Remote interface control; 4.1 Microcontroller interface; 4.2 Digital interface specifications

BVT3000 Version 003 BRUKER 27 (67)
4
Remote interface
control 4
Microcontroller interface 4.1
This interface has several functions:
• Host computer - EUROTHERM transparent communication through a serial
port
• Transmission of BVT3000 internal status to the host computer.
• Probe heater on/off control
• Gas flow control.
• Installed option control:
1. Evaporator heating power control.
2. Exchanger control with nitrogen level detection.
-etc...
Optoisolated inputs receive information and security flags:
• Probe heater overheating flag.
• Gas flow detection.
• Liquid nitrogen level monitoring (when option available).
• Probe heater power status flag (on/off).
• etc.
Eight optoisolated outputs (PORT3) transmit the control byte for the DAC that de-
livers the liquid nitrogen heater control signal.
Digital interface specifications 4.2
Microcontroller:
8 bits 8032 microcontroller clocked at 11,05 MHz
Program Memory
:
Flash EPROM 64 K. A new firmware can be downloaded into this memory via the
RS232 link.
Sram:
32 Kilobytes