Teledyne Insta Trans - trace and percent oxygen transmitter - Manual (Page 32)

Maintenance Insta-Trans
Teledyne Analytical Instruments 24
LEAD AND POTASSIUM HYDROXIDE, THAT CAN BE
HARMFUL IF TOUCHED, SWALLOWED, OR
INHALED. AVOID CONTACT WITH ANY FLUID OR
POWDER IN OR AROUND THE UNIT. WHAT MAY
APPEAR TO BE PLAIN WATER COULD CONTAIN
ONE OF THESE TOXIC SUBSTANCES. IN CASE OF
EYE CONTACT, IMMEDIATELY FLUSH EYES WITH
WATER FOR AT LEAST 15 MINUTES. CALL
PHYSICIAN. (SEE APPENDIX, MATERIAL SAFETY
DATA SHEET.)
CAUTION: DO NOT DISTURB THE INTEGRITY OF THE CELL
PACKAGE UNTIL THE CELL IS TO ACTUALLY BE
USED. IF THE CELL PACKAGE IS PUNCTURED AND
AIR IS PERMITTED TO ENTER, THE CELL WILL
REQUIRE AN EXCESSIVELY LONG TIME TO REACH
ZERO AFTER INSTALLATION (1-2 WEEKS!).
5.2.2 When to Replace a Cell
The characteristics of the Micro-fuel Cell show an almost constant
output throughout its useful life and then falls off sharply towards zero
at the end. Cell failure in the Insta-Trans is usually characterized by the
inability to span or excessive offset when used on low ppm ranges.
Before replacing the cell:
1. Check your span gas to make sure it is within specifications.
2. Check for leaks downstream from the cell, where oxygen
may be leaking into the system.
If there are no leaks and the span gas is OK, replace the cell.
5.2.3 Removing the Micro-fuel Cell
Remove the Cell Holder by holding the bottom in place and
unscrewing the Collar until the Cell Holder falls out with the Cell.
Remove the new cell from its package, and carefully remove the
shorting clip. Place the cell on the cell holder with the screen side facing
down and tighten the cell holder onto the instrument. See Figure 5-1.
5.2.4 Cell Warranty
The Insta-Trace cell is the standard trace sensor for the Insta-Trans.
It is suitable for use in applications where the O
2
level is being measured
on a ppm range. The warranty period of the Insta-Trace is six months