Teledyne OT-3 - Manual (Page 34)

Operation OT-3
Teledyne Analytical Instruments 26
until the display reads the desired percent concentration. (if
within 5 seconds no key is pressed, the instrument will return to
the sample mode and display oxygen concentration).
After setting the value wait for the unit to time out of this mode
(approximately 5 seconds) and return to displaying oxygen
concentration.
4.4.2 Set Alarm 2
Alarm 2 can be set either as a high or low alarm. To configure this
alarm to your preferences:
1. Press the SET ALARM 2 function button once.
2. The display will flash either HI or LO depending on how the
alarm was last configured. If the alarm configuration must be
changed, use the Up or Down keys to toggle the alarm from HI
to LO or vice-versa. 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 2 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 concentration. If
within 5 seconds no key is pressed, the instrument will return to
the sample mode and display oxygen concentration.
After setting the value wait for the unit to time out of this mode
(approximately 5 seconds) and return to displaying oxygen
concentration.
4.4.3 Power Failure Alarm
The power failure alarm provides a set of form C contacts and are
configured for failsafe operation. The contacts remain energized when
the whenever power is applied to the instrument.
4.5 Alarm Delay
The alarms have a user-settable delay feature which can delay the
onset of an alarm. The delay can be set from 0-20 minutes in 1 minute
increments.