Teledyne OXYGEN DETECTOR 319R - Manual (Page 11)

7
319R Installation & Operation 2.0
TELEDYNE BROWN ENGINEERING
Analytical Instruments
Calibration
To calibrate the 319R:
1. Place the power switch in the ON position.
2. Allow the LCD reading to stabilize.
3. Expose the sensor to ambient air (20.9%) or instrument grade
air. If the analyzer goes overrange, the display will go blank
and the LED to the left of the display will blink. Hold down the
SPAN button until the LED stops blinking.
4. While holding down the SPAN AT 20.9% button, adjust the
potentiometer to the right of the button until the display is
stable and reads 20.9%.
5. Release the button. The unit is now calibrated.
6. The alarms will be disabled for about 25 seconds after the
SPAN button is released. Disabling the alarms allows air to be
purged from the sample system without tripping any alarm set
below span, or 21%.
NOTE: Do not attempt to adjust any alarm setpoints while the alarms are
disabled during the 25-second period.