Teledyne t320u Manuale Utente

Troubleshooting and Service 

Teledyne API – Model T300/T300M CO Analyzer 

12.5.8.4. STATUS OUTPUTS 

The procedure below can be used to test the Status outputs: 

1.  Connect a jumper between the “D“ pin and the “” pin on the status output 

connector. 

2.  Connect a 1000 ohm resistor between the “+” pin and the pin for the status output 

that is being tested. 

3.  Connect a voltmeter between the “” pin and the pin of the output being tested (see 

table below).   

Under the DIAG SIGNAL I/O menu (see Section 12.1.3), scroll through the inputs 
and outputs until you get to the output in question.  Alternately turn on and off the 
output noting the voltage on the voltmeter, it should vary between 0 volts for ON and 5 
volts for OFF.   

1 SYSTEM 

OK 

2 CONC 

VALID 

3 HIGH 

RANGE 

4 ZERO 

CAL 

5 SPAN 

CAL 

6 DIAG 

MODE 

7 SPARE 

8 SPARE 

 

12.5.8.5. CONTROL INPUTS – REMOTE ZERO, SPAN 

The control input bits can be tested by the following procedure: 

1.  Jumper the +5 pin on the Status connector to the U on the Control In connector.   

2.  Connect a second jumper from the 

_ 

pin on the Status connector to the A pin on the 

Control In connector.  The instrument should switch from Sample Mode to ZERO 
CAL R mode.   

3.  Connect a second jumper from the 

_ 

pin on the Status connector to the B pin on the 

Control In connector.  The instrument should switch from Sample Mode to SPAN 
CAL R mode. 

4.  In each case, the T300/T300M should return to Sample Mode when the jumper is 

removed. 

06864B DCN6314