Filter
Top Products
Maintenance Schedule Teledyne API Model T201 NH
3
Analyzer Operator Manual
30 07271B DCN6646
Once you have the right tools and parts, replace the thermocouple as
follows:
1. Ensure power is removed from the M501 NH
3
Converter. If the
Converter has been operational you will need to wait for at least 2
hours for the Converter oven to cool before continuing with the
replacement of the thermocouple.
2. Remove the cover from the Converter chassis.
3. Unscrew the (4) nuts that secure the front panel to the chassis. They
are located just behind the front panel along the top.
4. Lower the front panel to gain easier access to the end of the quartz
tube.
5. Unscrew the (3) nuts that secure the inner cover protecting the Heater
Block and quartz tube. Remove this cover.
6. Cut the tie-wrap hold-down that secures the thermocouple to the
fitting at the end of the quartz tube.
7. Loosen the Teflon fitting at the end of the quartz tube taking care not
to put any stress on the tube, and slide the fitting off the tube.
8. Remove the thermocouple.
9. Disconnect the thermocouple wires from the Temperature Controller
noting that the ‘Yellow’ wire goes to pin 1 and the ‘Red’ wire goes to
pin 2.
10. The thermocouple should slide into the Heater Block.
11. Replace the tie-wrap hold-down.
12. Form the thermocouple wire so that it rests in the cavity with little
movement.
13. Connect the (2) wires of the thermocouple to the Temperature
Controller. The “yellow” wire should be connected to pin 1 and the
“red” wire should be connected to pin 2.
14. At this point, all connections have been made, both electrically and
pneumatically. A leak check should be performed on the Converter to
verify that all connections are leak free. If a leak is detected, the leak
should be resolved before continuing.
15. Install the inner cover of the Heater Block and secure with the (3)
nuts. Close the front fanel and secure with the (4) nuts. Install the top
cover on the Converter chassis.
16. The Converter is now ready for the application of power. You will be
looking for an indication from the Temperature Controller that it is
functioning correctly and driving the heater to the desired “set”
temperature. Apply power now.
17. After the Converter comes to the regulated temperature, perform the
Auto Tune function to tune the Temperature Controller to the new
thermocouple.