Teledyne 3110 – Portable Trace/Percent Oxygen Analyzer, unapproved version - Manual (Page 40)

Maintenance Model 3110
40 Teledyne Analytical Instruments
Maintenance & Troubleshooting
4.1 Routine Maintenance
Other than replacing the sensor and cell holder O-ring, there are no
user-serviceable components within the instrument housing. Routine
maintenance consists of wiping down the instrument case, cleaning the
screen and checking for leaks.
CAUTION: USING ABRASIVE CLEANSERS OR SOLVENTS WILL
DAMAGE THE SCREEN. USE ONLY A MILD
DETERGENT AND SOFT CLOTH WHEN REMOVING
DIRT OR GREASE MARKS FROM THE SCREEN.
When cleaning the instrument case, do not flood with water or use
harsh, abrasive or solvent cleansers. These cleansers will attack the LCD
lens material as well as eventually wear off the silk-screened legends.
4.2 Opening the Instrument Case
CAUTION: DEPENDING ON THE APPLICATION, IT MAY BE
NECESSARY TO PURGE THE INSTRUMENT THEN
REMOVE THE INSTRUMENT TO A NON-
HAZARDOUS AREA BEFORE OPENING THE
INSTRUMENT CASE.
To open the enclosure:
1. Loosen (counter-clockwise) the three (3) ¼-turn screwdriver-
type fasteners on the back of the outer enclosure.
2. Pull off the back section of the cover
4.3 Replacing the Battery
After many charge/recharge cycles of the battery, eventually the
Ni-Cd batteries will have to be replaced. Usually, when the instrument
requires more frequent charge cycles than before it is time to change the