Field Unit - Ametek 5000 Instrument Manual

Field Unit

(Refer to Figure 18, Part VI)
!
WARNING
Numbers in parentheses refer to find numbers in figure 18, Part VI, "Service and Parts".
Lid Removal
1. Shut off system power and sample and reference gas flows at their sources.
2. Unscrew the lid (1), using a bar across the slots on the top if required.
3. Carefully lift off the lid and set it aside.
Cell Replacement
1. Shut off system power and sample and reference gas flows at their sources.
2. Carefully remove the lid and set it aside.
3. Remove the oven cover wing nut (2); tilt the cover (3) up and carefully slide it from the assembly.
4. Loosen the two tubing nuts (4) and disconnect the lines.
5. Unplug the cell and board (5).
6. Carefully plug the new cell and board into its connector.
7. Connect and secure the two tubing nuts.
8. Install the oven cover and wing nut.
9. Do a leak test and re-install the lid.
10. Apply power and verify flows, back pressure and cell frequency.
11. Input new cell poly coefficients per instructions on page 4-9.
Cell Oven Replacement
1. Shut off the system power and sample and reference gas flows at their sources.
2. Carefully remove the lid and set it aside.
3. Remove the wing nut (2) from the oven cover.
4. Tilt the cover up and carefully remove it from the assembly.
5. Loosen the two tubing nuts (4), disconnect the lines, and unplug the cell board (5).
6. Remove the plugs (6 and 24) from electronics control board sockets J1 and J2, and unplug the
control board.
7. Loosen the tubing nuts (8A) and disconnect the tubes from solenoids SV1 and SV2 and from the
lower part of the oven assembly.
8. Disconnect the oven wires from TB1-4 and -5.
The Field Unit may contain flammable or toxic process gas. Remove the lid in a well-
ventilated area only after electrical poweris shut off and the surrounding area in known
to be non-hazardous . See other Warnings and Cautions in Part II, "Sample System.
"The lid weighs 8.2 kg (18 pounds). Handle with care.
Troubleshooting and Maintenance 6-13