Teledyne 3300TB - Low cost trace oxygen analyzer - Manual (Page 30)

4 Operation Model 3300 TB
4-6 Teledyne Analytical Instruments
4.7 Displaying Percent & PPM on the LED
Display
The analyzer displays the concentration in percent whenever the read-
ing is over 9999 ppm. When the reading changes to percent, the LED
display will alternate between flashing “PC” and the oxygen concentration.
On the other hand, if the instrument is displaying ppm, only the concentra-
tion reading will be shown.
Supplementary Information
If, during the Span Procedure, you pressed the SPAN button by mis-
take, you must wait five minutes for the analyzer to resume analisis or you
can press the UP button and then the DOWN button. (Pressing the UP and
DOWN buttons causes the analyzer to time-out in five seconds instead of
five minutes).
If during the span procedure, you press the RANGE or ALARM
buttons:
- either the range or alarm routine will be activated.
- any changes to span will be rejected.
- the 60 second alarm delay will not occur, i.e., the alarms will be
responsive immediately.
CAUTION: TET/AI considers the action of pressing the ALARM or RANGE
buttons to be at your (the user’s) discretion. The user should be
aware that the alarms will become active within 5 (five) seconds if
the Range or Alarm bottons are pressed during Span. This may
result in false alarms if the Span gas has not been fully purged
from the Cell and Sample lines.