Teledyne t320u Manuale Utente

Theory of Operation 

Teledyne API – Model T300/T300M CO Analyzer 

about certain analyzer conditions.  They can be used to interface with certain types of 
programmable devices (See Section 3.3.1.4).   

By applying +5VDC power supplied from an external source such as a PLC or Data 
logger (See Section 3.3.1.6), Zero and Span calibrations can be initiated by contact 
closures on the rear panel.   

This circuit monitors the +5V power supply during start-up and sets the analog outputs, 
external digital I/O ports, and I

2

C circuitry to specific values until the CPU boots and the 

instrument software can establish control.  

13.4.6. I

I

2

C is a two-wire, clocked, bi-directional, digital serial I/O bus that is used widely in 

commercial and consumer electronic systems. A transceiver on the motherboard 
converts data and control signals from the PC-104 bus to I

2

C. The data is then fed to the 

relay board, optional analog input board and valve driver board circuitry.  

 

13.4.7. POWER SUPPLY/ CIRCUIT BREAKER 

The analyzer operates on 100 VAC, 115 VAC or 230 VAC power at either 50Hz or 
60Hz.  Individual units are set up at the factory to accept any combination of these five 
attributes.  As illustrated in Figure 13-14, power enters the analyzer through a standard 
IEC 320 power receptacle located on the rear panel of the instrument.  From there it is 
routed through the ON/OFF Switch located in the lower right corner of the Front Panel.  
A 6.75 Amp circuit breaker is built into the ON/OFF Switch. 

AC power is distributed directly to the sample gas pump.  The bench and GFC Wheel 
heaters as well as the GFC Wheel receive AC power via the relay board.   

AC Line power is converted stepped down and converted to DC power by two DC 
power supplies.  One supplies +12 VDC, for valves and the IR source, while a second 
supply provides +5 VDC and ±15 VDC for logic and analog circuitry.  All DC voltages 
are distributed via the relay board. 

 

 

 

06864B DCN6314