Teledyne OT-3 operating instructions Alarm Delay, Power Failure Alarm

Operation OT-3

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.

4.5Alarm 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.

Teledyne Analytical Instruments 26