Teledyne T200, Руководство по эксплуатации, Страница: 253 / 425

Teledyne API
– T200 NO/NO
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Analyzer Operation Manual Troubleshooting & Service
251
12.7.6. MOTHERBOARD
12.7.6.1. TEST CHANNEL / ANALOG OUTPUTS VOLTAGE
The ANALOG OUTPUT submenu, located under the SETUP

MORE

DIAG
menu is used to verify that the T200 analyzer‟s three analog outputs are working
properly. The test generates a signal on all three outputs simultaneously as shown in the
following table:
Table 12-9: Analog Output Test Function - Nominal Values Voltage Outputs
FULL SCALE OUTPUT OF VOLTAGE RANGE
(see Section
5.9.3.1
)
100MV 1V 5V
10V
*
STEP % NOMINAL OUTPUT VOLTAGE
1 0 0 0 0 0
2 20 20 mV 0.2 1 2
3 40 40 mV 0.4 2 4
4 60 60 mV 0.6 3 6
5 80 80 mV 0.8 4 8
6 100 100 mV 1.0 5 10
*
For 10V output, increase the Analog Output Calibration Limits (AOUT CAL LIM in the
DIAG>Analog I/O Config menu) to 4% (offset limit) and 20% (slope limit).
For each of the steps the output should be within 1% of the nominal value listed except
for the 0% step, which should be within 0mV ±2 to 3 mV. Ensure you take into account
any offset that may have been programmed into channel (See Section 5.9.3.9).
If one or more of the steps fails to be within these ranges, it is likely that there has been
a failure of the either or both of the Digital-to-Analog Converters (DACs) and their
associated circuitry on the motherboard. To perform the test connect a voltmeter to the
output in question and perform an analog output step test as follows:
06858E DCN7057