Teledyne 3000ZA - Trace oxygen analyzer - Manual (Page 64)

Maintenance 3000ZA
Teledyne Analytical Instruments 52
Maintenance
5.1 Routine Maintenance
Aside from normal cleaning and checking for leaks at the gas
connections, routine maintenance is limited to replacing the sensor and
fuses, and recalibration. For recalibration, see Section 4.4 Calibration.
WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS
MANUAL.
5.2 Cell Replacement
The ZrO
2
sensor is a sealed transducer with no electrolyte to
change or electrodes to clean. When the cell reaches the end of its useful
life, it is replaced. The spent sensor should be discarded according to
local regulations.
5.2.1 Removing the Sensor
The ZrO
2
sensor is located inside the nylon cell block behind the
front panel.
To remove an existing cell (refer to Figure 5-1):
1. Remove power to the instrument by unplugging the power
cord at the power source.
2. Open the front panel door by pressing the release button on
the top right corner of the door all the way in with a narrow
gauge tool.
3. Unscrew the collar on the top assembly of the cell block from
the bottom section of the cell block assembly. The sensor is
attached to pin sockets on the bottom assembly.