Teledyne Mixchek - Helium / Oxygen mixture analyzer - Manual (Page 27)

MIXCHEK Maintenance
Teledyne Analytical Instruments 27
Maintenance
The
MIXCHEK requires very little maintenance, other than
calibration, checking and changing the batteries and oxygen sensor, and
cleaning the plastic housing. Routine maintenance consists of periodic
cleaning of the front panel and displays and leak checking the gas lines.
Should any part of the instrument malfunction or fail to perform, the unit
should be removed from service and returned for repair and calibration.
This unit contains no user-serviceable parts except the oxygen sensor and
batteries.
4.1 Micro-Fuel Cell Replacement
The sensor has an expected life of 36 months in air. When the
sensors lifetime is exhausted, its output will fall off and will no longer
be able to hold calibration.
To remove and replace the micro-fuel cell see Section 2.3.
4.1.1 Storing and Handling Replacement Cells
To have a replacement cell available when it is needed, TAI
recommends that one spare cell be purchased after commissioning the
instrument shortly before the end of the cell's two-year warranty period.
The spare cell should be carefully stored in an area that is not
subject to large variations in ambient temperature (75 °F nominal) or to
rough handling.
4.2 Battery Replacement
Figure 4-1 shows the battery compartment and indicates the battery
disposition as they are replaced. Refer to Section 2.6 and Figure 2-6 for
battery replacement procedure.
Note: Do not use rechargeable batteries. When replacing the
batteries, replace all four at once. It is false economy to
replace individual batteries. .