Teledyne 3000TA-XLEU - Trace oxygen analyzer - Manual (Page 49)

Trace Oxygen Analyzer Installation
Teledyne Analytical Instruments 33
The following procedure can be used to install the Insta-Trace
Micro-fuel Cell:
Note: Even though the Insta-Trace Micro-fuel Cell has a short
recovery time after ambient air exposure, minimizing this
exposure still reduces the recovery time necessary.
CAUTION: DO NOT TOUCH THE SENSING SURFACE OF THE
CELL. IT IS COVERED WITH A DELICATE TEFLON
MEMBRANE THAT CAN LEAK WHEN PUNCTURED.
Before installing a new cell. check the O-ring in the base of the cell
holder. Replace if worn or damaged. See Figure 3-8.
Place the cell on the holder with the screen side facing down.
Note: There is a small location hole drilled in the holder. This hole
mates with a guide pin on the bottom rear of the cell block.
The hole in the cell block holder must align with the guide
pin on the cell block.
1. Remove power from the instrument.
2. Remove the old sensor (if installed). Discard in accordance
with all Federal, State, Local or other regulations which may
apply.
3. Purge the analyzer at approximately 1 SCFH flow rate with
nitrogen (or applicable sample gas with the sensor holder
removed).
4. Remove the new sensor from its double bag storage.
5. Remove the sensor shorting button.
6. Place the sensor inside the cell block.
7. Hold the sensor up into the block while positioning the cap
under the sensor. Vigorously push the cell holder with the
sensor into the cell block, thus puncturing the protective
film/seal cover.
8. Push the gate on the cell block down so that the slots on the
side of the gate engage the locating screws on the side of the
block. This forces the holder into position and forms a gas-
tight seal.