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Internal Connectors
Measurement
Interface Board
Measurement Interface
Board Connectors
Flow Sensor
Assembly
Thermo Fisher Scientific
Internal connectors include:
Function key panel and Display
●
Measurement Interface Board Data
●
I/O Expansion Board Data
●
Digital Output Board
●
AC distribution
●
The measurement interface board serves as a central connection area for all
measurement electronics in the instrument. It contains power supplies and
interface circuitry for sensors and control devices in the measurement
system. It sends status data to the motherboard and receives control signals
from the motherboard.
Connectors located on the measurement interface board include:
Data communication with the motherboard
●
24V and 120VAC power supply inputs
●
Fan and solenoid outputs
●
120VAC outputs for the pump and temperature control
●
Flow and pressure sensors
●
Ambient temperature sensor
●
Bench heater
●
PMT high voltage supply
●
Input board
●
Flash trigger
●
Flash intensity
●
Diagnostic LED
●
The flow sensor assembly consists of a board containing an instrumentation
amplifier and a flow transducer with input and output gas fittings. The
flow transducer output is produced by measuring the pressure difference
across a precision orifice. This unit is used for measuring the flow of sample
gas in the measurement system.
Model 43i Trace Level-Enhanced Instruction Manual
System Description
Electronics
8-7
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Troubleshooting
