Oxygen Equipment User Manual

3. OPERATING INSTRUCTIONS

3.1 Alarm Setting Procedure

3.1.1 Low Alarm Setting

To adjust the low alarm setting:

1) Press the LOCK/UNLOCK key to unlock the keypad.

2) Press the LOW SET key. The "LOW" icon will start to flash.

3) Use the ↑ and ↓ arrow keys to set the low alarm to the desired

value. Pressing the arrow keys changes the value in 1% increments.

If the keys are held down for more than 1 second the display will

scroll at a rate of 4% per second.

Note: If 10 seconds elapse between key actuations, the system will

store the latest low alarm value and will revert to normal operation.

If this occurs inadvertently, simply repeat the alarm setting

procedure.

The low alarm value cannot be set lower than 18%, nor can it be set

closer than 1% from the high alarm value due to ASTM specifications

(special applications requiring alarms below 18% can be accomodated by

the model OM-25ME-L Monitor). For example, if the high alarm is set at

25%, the system will not accept a low alarm setting greater than 24%.

4) When the low alarm value is set, press the LOW SET or

LOCK/UNLOCK key again to accept the low alarm setting and return

to normal operation.

Note: To automatically set the low alarm to 18% without scrolling

the display, hold the LOW SET key down and press the

↓↓

arrow key

when the "LOW" icon is flashing.

3.1.2 High Alarm Setting

To adjust the high alarm setting:

1) Press the LOCK/UNLOCK key to unlock the keypad.

2) Press the HIGH SET key. The "HIGH" icon will start to flash.

3) Use the ↑ and ↓ arrow keys to set the high alarm to the desired

value.

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