Teledyne t320u Manuale Utente

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Teledyne API – Model T300/T300M CO Analyzer 
Troubleshooting and Service 
285
 
 
 
12.5.8.3. ANALOG OUTPUTS: CURRENT LOOP 
 
To verify that the analog outputs with the optional current mode output are working 
properly, connect a 250 ohm resistor across the outputs and use a voltmeter to measure 
the output as described in Section 5.9.3.6 and then perform an analog output step test as 
described in Section 12.5.8.2.   
For each step the output should be within 1% of the nominal value listed in the table 
below. 
Table 12-11: 
Analog Output Test Function - Nominal Values Voltage Outputs 
OUTPUT RANGE 
2 -20 
4 -20 
NOMINAL OUTPUT VALUES 
STEP 
CURRENT 
V(250 OHMS) 
CURRENT 
V(250 OHMS) 
1 0  2 
mA 
0.5V 
2 20  5.6 
1.4 
7.2 
1.8 
3 40  9.2 
2.3 
10.4 
2.6 
4 60  12.8 
3.2 
13.6 
3.4 
5 80  16.4 
4.1 
16.8 
4.2 
6 100  20 
20 
 
 
06864B DCN6314