Teledyne T200, Руководство по эксплуатации, Страница: 254 / 425

Troubleshooting & Service Teledyne API
– T200 NO/NO2/NOx Analyzer Operation Manual
252
SAMPLE RANGE=500.0 PPB NOX= XXXX
<TST TST> CAL SETUP
DIAG SIGNAL I/O
PREV NEXT ENTR EXIT
DIAG AOUT ANALOG OUTPUT
[10%] EXIT
SETUP X.X ENTER PASSWORD
8 1 8 ENTR EXIT
DIAG AOUT ANALOG OUTPUT
0% EXIT
·
Pressing the “x%” button pauses the
test. Brackets will appear around the
value: EXAMPLE: [10%]
·
Pressing the “[x%]” button resumes the
test.
Performs analog output step
test 0% to 100%
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
12.7.6.2. A/D FUNCTIONS
The simplest method to check the operation of the A-to-D converter on the motherboard
is to use the Signal I/O function under the
DIAG menu to check the two A/D reference
voltages and input signals that can be easily measured with a voltmeter.
1. Use the Signal I/O function (see Section 12.1.3 and Appendix A) to view the value
of
REF_4096_MV
and
REF_GND
.

If both are within 3 mV of nominal (4096 and 0), and are stable, ±0.2 mV then
the basic A/D is functioning properly. If not then the motherboard is bad.
2. Choose a parameter in the Signal I/O function list (see Section 12.1.3) such as
OZONE_FLOW .

Compare this voltages at its origin (see the interconnect drawing and
interconnect list in Appendix D) with the voltage displayed through the signal I/O
function.

If the wiring is intact but there is a large difference between the measured and
displayed voltage (±10 mV) then the motherboard is bad.
06858E DCN7057