Teledyne 2120 - Trace Nitrogen in Argon Analyzer - Manual (Page 55)

Trace Nitrogen in Argon Analyzer Maintenance
2. Apply activating voltage (120 VAC on a 120 V model/ or 230
V on a 230 V model) to the relay coil. If the relay does not
activate, it is faulty.
To replace the control relay, perform the following steps:
1. Remove the AC power cord from the unit.
2. Remove the top cover.
3. Remove and replace the control relay.
5.4.5 Analytical Cell
Refer to Figure 5-2.
To remove cell and mounting bracket assembly from analyzer:
1. Remove the AC power cord from the unit.
2. Remove the inlet and outlet tubes (A, B) from the sample
system fittings, using care not to torque or pressure the glass
cell inlet and vent tubes.
3. Remove the nuts from the four bolts that attach the cell
mounting bracket to the mounting plate on the bottom of the
analyzer (C).
4. Lift the cell and mounting bracket assembly gently to gain
access to the electrode connections (D).
5. Remove the transformer high voltage leads from the electrode
connections by gently loosening and removing the nuts that
hold them in place.
Figure 5-2: The Analytical Cell
Teledyne Analytical Instruments
45