Teledyne TurbO2 - Portable trace oxygen analyzer - Manual (Page 12)

8
TURBO
2
Portable Trace Oxygen Analyzer
Teledyne Analytical Instruments
Calibration
The inherently constant output of the cell during its useful life precludes
a definitive calibration cycle. TAI feels that the interval between calibrations
should be dictated by your application. If the instrument is being used to
certify the oxygen content of a product for delivery, then, a calibration prior
to certification would be in order. If not, a biweekly or monthly calibration is
adequate. However, the rapid response of the S-2 cell allows more frequent
air calibrations than possible with earlier type instruments.
NOTE: Do not calibrate the instrument unless there is a trace oxygen gas
readily available for purging immediately following calibration.
To calibrate the instrument:
1) Stand the instrument upright on a level surface, and with the
Range Selector Switch in the OFF position, check the alignment
of the meter pointer with the zero mark on the scale. Use the
mirror to eliminate parallax, and adjust the screw on the face of
the meter, if necessary, until the pointer and zero mark are in
precise coincidence.
2) Move the Range Selector Switch to the CAL position.
3) Install the plastic tube equipped male disconnect fitting in either
of the analyzer’s sample ports, and a blank disconnect fitting in
the other port (direction of sample flow is of no importance). A
pump is recommended on the plastic tube. Pump the tube until
the meter reading is stable.
WARNING: DO NOT ATTEMPT TO DRAW SAMPLE THROUGH THE ANALYZER
ORALLY.
The sensor electrolyte is caustic. Do not let it come in contact with
skin. If it does, immediately flush affected area with water. Con-
sult the Emergency First Aid procedures in the Material Safety
Data Sheet at the end of the manual. Do not attempt to open or
repair the sensor. Leaking or exhausted sensors should be dis-
posed of in accordance with local regulations. Consult the Mate-
rial Safety Data Sheet at the end of the manual.
4) Unlock and adjust the SPAN potentiometer until the meter
pointer is in coincidence with the CAL mark on the meter scale.
Be sure to relock the control after the adjustment is made.
5) Immediately after step 4, disconnect the tubing-equipped
calibration fitting, and plug in either the sample or a source of
inert gas.