Oxygen Equipment User Manual

Alarm LEDs

Low Alarm LED- In a low alarm condition, the red "LOW

ALARM" LED will flash each second, accompanied by the alarm

beeper.

High Alarm LED- In a high alarm condition, the red "HIGH

ALARM" LED will flash each second, accompanied by the alarm

beeper.

Keyp

ON/OFF Key- (after Calibration) This key is used to turn the

instrument on or off. When batteries are installed in the unit and

the unit is in the power off mode, the display will be blank. When

the ON/OFF key is pressed once, the unit will start to display the

oxygen concentration and the keypad is activated. If the ON/OFF

key is pressed again, the unit reverts to the power off mode.

LOCK/UNLOCK Key- Pressing the LOCK/UNLOCK key

will unlock the keypad and cause the ”LOCKED" icon to

disappear from the LCD readout. The unit can then be calibrated

and alarm settings can be changed if desired. If no other keys

are pressed within 10 seconds, the "LOCKED" icon will reappear

and the unit will revert to the "LOCKED" mode. When the unit is

in the unlocked state, pressing the LOCK/UNLOCK key will also

cause the "LOCKED" icon to reappear.

CALIBRATE Key- The Unit will force you to Calibrate the

first time power is applied or the sensor is changed. This is

indicated on the LCD by the word “CAL”. Pressing the

CALIBRATE key will allow the ↑ and ↓ arrow keys to calibrate the

unit. Also when the keypad is unlocked, the CALIBRATE key is

used in conjunction with the ↑ and ↓ arrow keys to calibrate the

unit. When the CALIBRATE key is pressed, "CAL" appears on

the LCD readout for 1 second and then the measured calibration

concentration is displayed. The calibration value can then be

changed using the ↑ and ↓ arrow keys. During calibration, the

"%" sign will flash at a once per second rate. When the

calibration value is set, pressing the CALIBRATE or

LOCK/UNLOCK key will cause the unit to exit the calibration

mode and return to normal operation. The unit will also revert to

normal operation if 10 seconds elapse and no keys are pressed.

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