Teledyne IR-7000 - Non-dispersive infrared series - Manual (Page 67)

NDIR Gas Analyzer Maintenance 6
Teledyne Analytical Instruments., - Rev. 3 59
70% isopropyl alcohol
30% distilled water
3. Rinse the Sample cell with the above solution to remove any
spots. A household glass cleaner can be used in place of the
above solution however the resulting surface is not as clean.
CAUTION: Never use a brush or any other object to scrub the inside of the
sample cell. The gold or silver coating is soft and can easily be
scratched.
4. Allow the Sample cell to air dry.
5. Reinstall the Sample cell by reversing the steps in Section
6.2.1.
6.2.3 Replacing the IR Source
To replace the IR source, disassemble the optical bench and remove
the sample cell as described in Section 6.2.1.
Cut the plastic tie that holds the gray cable from the IR source to the
holder. If not done already, disconnect the other end of this cable from the
main board J2. On instruments with dual benches, note which main board
is involved.
With the IR source disconnected from the sample cell and the IR
source holder free of the optical bench mounting plate, the IR source can
be removed by loosening the small plastic hex set screw in the holder.
Insert the new source into the IR source holder and reassemble the
sample cell as described in Section 6.2.1. Use a plastic tie to secure the
source cable to the holder.
NOTE: With the Sample cell disassembled, it would be convenient to clean
the cell as described in Section 6.2.2.
6.2.4 Replacing the Battery (Portable Model Only)
To replace the battery in the portable model:
1. Flush the instrument with nitrogen for 15 minutes.
2. Turn off the instrument and, if connected, remove the battery
charger.
3. Disconnect the probe from the front of the instrument.
4. Remove the screws securing the top case and slide the case off
the analyzer.