Heated Umbilical Maintenance - Thermo Scientific Mercury Freedom 80i Manual

Heated Umbilical
Maintenance
Thermo Fisher Scientific
thermocouples for troubleshooting only. The A1 connector has the
controlling thermocouple along with a spare. Refer to Figure B–3 on page
B-4.
Connector B is for the four heaters at the probe, stinger, converter,
●
probe heater, and oxidizer heater.
Connector C is for the 4-20 mA pressure transducers up at the probe,
●
venturi, orifice pressures for the 83i, and orifice the 83i GC.
Connector D is for controlling the valves, orifice cal, filter cal, filter
●
blowback, stinger blowback, and the oxidizer valves.
Use the following procedure to clean the Total and Elemental lines. Refer
to Table 5–1 for the recommended cleaning schedule.
Cleaning Materials Required:
5% solution of nitric acid mixed with DI water
Distilled water
1. Turn the power OFF to the umbilical or set it to 50 °C.
2. Disconnect the Total and Elemental lines from the 80i.
3. Disconnect the Total and Elemental lines up at the 83i.
4. Place a collection container at the CEMS rack and insert either the
Total or the Elemental line into it.
5. Go up to the probe and pour one quart of distilled water (DI); let it
drain down the line. Ensure there are no low spots where water can
collect.
6. Pour in one quart of dilute nitric acid solution (5% solution of nitric
acid mixed with DI water); allow to drain.
7. Flush with one quart of DI water again.
8. Repeat Steps 5 through 7 and then purge both lines with zero air for
approximately one hour.
Preventive Maintenance
Heated Umbilical
Mercury System Manual 5-3