Advertisement
System Description
Peripherals Support System
Peripherals
Support System
Step POL Board
Sample Pump
Solenoid Valve
Panel (optional)
Flow/Pressure
Firmware
8-8
48iQ Instruction Manual
The peripherals support system operates those additional devices that are
needed, but do not require special feedback control or processing. These
components are connected to a Peripherals Support Board (PSB).
The PSB microprocessor regulates the timing and health of such devices,
and generates registers that interact with the higher level system controls.
Fan
The chassis fan provides air cooling of the active electronic components.
The Step POL board provides high/low outputs for continuous operation
or on/off states. The Step POL board contains the basic circuitry to provide
a programmable load to passive devices, either continuously, or on user or
automated command. In the iQ Series instruments, the pump, solenoids,
etc., are controlled off of the Step POL board from commands generated
via the PSB.
Internal vacuum pump for generating air/sample through the instrument.
Optional solenoid valves for switching between sample, zero, and span
gases, and other optional components.
The Flow/Pressure DMC is used measure instrument pressures that assure
proper flow regulation and for sample pressure within the measurement
DMC
bench for pressure corrections and compensation.
The DMC includes two pressure sensors that read 0860 mmHg. These
sensors are used with the coupled restricting capillary for flow control along
with the downstream sample pump. The pressure differential determines
the flow through the capillary. The upstream pressure is the measurement
bench pressure, while the downstream pressure is at the pump inlet
pressure.
Like the hardware, the firmware is modular and located within
microprocessors distributed throughout the instrument. In the 48iQ,
microprocessors containing firmware are located as follows:
Optical Bench DMC
●
Flow/Pressure DMC
●
Thermo Scientific
Advertisement
Chapters
