Teledyne 3300TB, Operating Instructions Manual, Page: 36 / 51

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 23
4.3.1 HI Range
Setting the HI Range fullscale value defines the LEAST sensitive
analysis range to be used. To set the HI Range:
1. Press the SET HI RANGE Function button once.
2. Immediately (within 5 seconds) press either the ▲or
▼button to raise or lower the displayed value, as required,
until the display reads the desired fullscale percent
concentration.
4.3.2 LO Range
Setting the LO Range fullscale value defines the MOST sensitive
range to be used. To set the LO Range:
1. Press the SET LO RANGE Function button once.
2. Immediately (within 5 seconds) press either the D or Ñ
button to raise or lower the displayed value, as required, until
the display reads the desired fullscale percent concentration.
4.4 Setting the Alarm Setpoints
The alarm setpoints can be adjusted over the full range of the
analyzer (0-9999 ppm oxygen content). The set point values are
expressed in ppm only.
4.4.1 Set Alarm 1
Alarm 1 can be set either as a high or low alarm. To configure this
alarm to your preferences:
1. Press the SET ALARM 1 function button once.
2. The display will flash either HI or LO depending on what the
alarm was configured in the last time. If the alarm
configuration must be changed, use the Up or Down keys to
toggle the alarm from HI to LO or viceversa (if within 5
seconds no key is pressed, the instrument will return to the
sample mode and display oxygen concentration).
3. To change the setting at which the alarm will be actuated,
press the SET ALARM 1 function button once more. The
alarm setpoint will flash on the LED display. Press either the
Up or Down keys to raise or lower the displayed value, as
required, until the display reads the desired percent