Teledyne 3000ZA-3X - Trace oxygen analyzer - Manual (Page 57)

Trace Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 45
Maintenance
5.1 Routine Maintenance
Aside from normal cleaning and checking for leaks at the gas
connections, routine maintenance is limited to replacing the sensors and
fuses, and recalibration. For recalibration, see Section 4.4 Calibration.
WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS
MANUAL.
5.2 Sensor Replacement
The ZrO
2
sensors are sealed transducers with no electrolyte to
change or electrodes to clean. When the sensor 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
sensors is located inside the nylon cell block behind the
front panel.
To remove an existing cell (refer to Figure 5-1):
CAUTION: POWER IS APPLIED TO THE INSTRUMENT
CIRCUITRY WHENEVER THE INSTRUMENT IS
CONNECTED TO THE POWER SOURCE. THE RED
SWITCH ON THE FRONT PANEL IS FOR SWITCHING
POWER ON OR OFF TO THE DISPLAYS AND
OUTPUTS ONLY.
1. Remove power to the instrument by unplugging the power
cord at the power source.