Teledyne 3000PB - Bulkhead mount percent oxygen analyzer User Manual

Page 61

Percent Oxygen Analyzer

Maintenance 5

5-3

Teledyne Analytical Instruments

5.3.1 Storing and Handling Replacement Cells

To have a replacement cell available when it is needed, it is recom-

mended that one spare cell be purchased 4-5 months after commissioning
the 3000PB, or shortly before the end of the cell's warranty period.

CAUTION: Do not stockpile cells. The warranty period starts

on the day of shipment.

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.

WARNING: THE SENSOR USED IN THE MODEL 3000PB PER-

CENT OXYGEN ANALYZER USES ELECTROLYTES
WHICH CONTAIN TOXIC SUBSTANCES, MAINLY
LEAD AND POTASSIUM HYDROXIDE, THAT CAN BE
HARMFUL IF TOUCHED, SWALLOWED, OR IN-
HALED. 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 PHYSI-
CIAN. (SEE APPENDIX, MATERIAL SAFETY DATA
SHEET.)

5.3.2 When to Replace a Cell

When the sensor in the 3000PB begins to fail, the analyzer will

usually require more and more frequent calibration. If the 3000PB analysis
readings drift downward uncharacteristically, try recalibration. If recalibra-
tion raises the readings temporarily only, suspect the cell.

Before replacing the cell:

a. Check for leaks downstream from the cell, where oxygen may

be leaking into the system.

b. Check your span gas to make sure it is within specifications.

c. If there are no leaks and the span gas is OK, check the output of

the cell itself by going to the

System

function,

selecting

and pressing Enter

. The cell output reading will be on the

second line of the display.