TELEDYNE API T200U NOy, Руководство оператора

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Model T200U NOy Option Manual Addendum
26 07303E DCN7996
6.4 Replacing the Converter
The heater, thermocouple, and converter interior assembly is designed to be
replaced as a single unit. Check Figure 4 for the assembly location.
CAUTION!
The converter operates at 315°C. Severe burns can result if not enough time
is allowed for the assembly to cool. Do not handle assembly until it is at room
temperature.
1. Turn off the power to the 501 NOy at its front panel ON/OFF switch.
2. Unplug the 501 NOy Assembly from the AC main.
3. Allow the external Converter to cool.
4. Disconnect the gas fittings, the power connector, and the thermocouple to the
converter ( Figure 4 ).
5.
Remove the interior-assembly box from the chassis by loosening the 4 captive
screws that secure the assembly to the chassis.
6. Remove bottom bracket and re-attach it to the replacement box with interior
assembly.
7. Install the box with interior assembly back into the analyzer, tightening the 4
captive screws.
8. Re-attach the electrical and pneumatic fittings. Leak check the assembly when
completed.
9. Plug the 501 NOy into the AC main and power back on. (The insulation can
emit a burnt odor for the first 24 hours; this is normal).
10. Allow the Converter to burn-in for 24 hours.
11. After the 24-hour burn-in, re-calibrate the instrument.
Figure 4. NOy Converter Interior Assembly Location