Siemens 7MB1420, Instruction Manual, Page: 6 / 74

3 Design
The device is available either as a bench-top unit fitted in a housing, or without a housing for
installation in a 19-inch rack or 19-inch cabinet.
The FIDAMAT comprises two main sections, the analyzer section and the electronics with front panel
controls.
Analyzer section
The analyzer section consists of the oven with sample gas filter, detector chamber and various
restrictors. The oven is accessible from the side to enable modifications or repairs to be carried out
in the installed condition without loosening the electric connections or gas piping connections. The
sample gas filter is accessible from the front when the front panel has been folded out.
The analyzer section also contains the diaphram pump with separate oven for the pump head. The
pump can be dismounted from the front without having to open the oven.
The analyzer section also contains pressure regulators, solenoid valves, pressure sensors and a
flow sensor.
Electronics
The electronics consist of the input board which is integrated into the front panel, the motherboard
with preamplifier board and the control board.
The motherboard contains the EPROMs for the software, the EEPROM for the parameter sets and
the switch for the write-protected area on the EEPROM.
6