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The low alarm value cannot be set lower than 15%, nor can it be set closer than 1% from the
high alarm value. 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 Unlock key
to accept the low alarm
setting and return to normal operation.
NOTE:
The default low alarm setting is 18% O2. Removing the batteries or shutting the unit OFF
will reset the low alarm limit to 18% if it is set to <18%.
3.1.2 High Alarm Setting
To adjust the high alarm setting:
1. Press the Unlock key
to unlock the keypad. Note the LOW, SMART ALARM, CAL and
HIGH icons will begin to flash indicating the SET OPERATING MODE.
2. Press the UP (HIGH ALARM)
key on the key pad.
NOTE:
The High Alarm digits begin to flash indicating the High Alarm manual setting.
3. Use the UP
and DOWN
keys to set the high 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 1% second.
NOTE:
If 30 seconds elapse between key actuations, the system will store the latest high alarm
setting and will revert to normal operation. If this occurs inadvertently, simply repeat the
alarm setting procedure.
When the high alarm setting is set above 100% the high alarm will indicate two dashes --. This
special condition turns off or deactivates the high alarm.
4. When the high alarm value is set, press the Unlock key
again to accept the high
alarm setting and return to normal operation.
NOTE:
The default high alarm setting is 50% oxgyen. Removing the batteries will reset the high
alarm limit to 50%.
3.1.3 Smart Alarm Mode
NOTE:
Smart alarms function as alarm guardrails which simultaneously set the low and high
alarms to ± 3% oxgyen of the current reading. This range can be broadened by pressing the up
button or narrowed by pressing the down button.
1. Press the unlock
key to unlock the keypad. Note the LOW, Smart Alarm, CAL and
HIGH icons will begin to flash indicating the SET OPERATING MODE.
2. Press the Smart Alarm
key on the keypad. Note the LOW digits, Alarm Mode and
HIGH digits begin a slow flash indicating SMART ALARM MODE. The high alarm will
now be set to be equal to the current r3% (rounded to the nearest interger).
The low alarm will now be set to be equal to the current reading -3% (rounded to the
nearest integer but never lower than 18%).
3. Pressing the Up
key will add one to the high alarm setting and subtract one from
the low alarm setting. Pressing the Down
key will subtract one from the high
alarm setting and add one to the low alarm setting. In other words, the Up Arrow
widens the alarm band and the down arrow tightens the alarm band. This feature will
not set the alarm levels above 100% or below 18% for oxygen.
4. Once the desired alarm settings are attained, press the Unlock
key to save the
settings and return to normal operation mode. If 30 seconds elapse without a key
press by the user, the device will automatically save the new alarm settings and return
to normal operation mode.
3.2 Basic Operation
To check the oxygen concentration of a sample gas:
1. Using the ON/OFF key
, make sure the unit is in the power on mode and properly
calibrated.
2. Place the external flow diverter in the sample gas stream. When using a standard
"T" adapter, make sure the sensor is mounted in the adapter with the flow diverter
pointing downward. This will prevent moisture from potentially draining into the
sensor membrane.
NOTE:
It is important that a tight fit exists between the diverter and the "T" adapter.
3. Initiate flow of the sample gas to the sensor.
3.3 Alarm Conditions and Priorities
In the event of either a low alarm or high alarm condition, the corresponding LED will begin
to flash, accompanied by the audio buzzer. Pressing the SILENT key
will deactivate the
buzzer but the LED and the alarm value digits on the display will continue to flash until the
alarm condition has been rectified. If the alarm condition still exists 120 seconds after silencing
the audio buzzer, the beeper will start to sound again.
A low alarm condition will remain until the actual concentration is 0.1% higher than the low
alarm setting. A high alarm condition will remain until the the actual concentration is 0.1%
lower than the high alarm setting.
To help differentiate the level of priority, the monitor provides three unique audible sequences.
ALARM
ALARM
PRIORITY
LOW
ALARM
LED
HIGH
ALARM
LED
AUDIBLE
ALARM
AUDIBLE
ALARM
REPEAT
Line Power
Plugged In
Informational
Off
Off
2 Pulses
No Repeat
Line Power
Unplugged
Informational
Single Yel-
low Pulse
Single Yellow
Pulse
2 Pulses
No Repeat
External DC
Power Supply
Voltage Out of
Range
Informational
Solid Yellow
Solid Yellow
2 Pulses
Every 15 Sec.
Battery Voltage
too low for
device to operate
(E04)
Medium
Pulsing
Yellow
Pulsing
Yellow
3 Pulses
Every 25 Sec.
Oxygen level
above the high
alarm setting
Medium
Off
Pulsing
Yellow
3 Pulses
Every 25 Sec.
Oxygen level
below the low
alarm setting
Medium
Pulsing
Yellow
Off
3 Pulses
Every 25 Sec.
Oxygen level
below the low
oxygen alarm
setting and lower
than 18%
High
Pulsing Red
Off
5+5 Pulses
Every 15 Sec.
