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CALIBRATION POINT
1. The sensor will be calibrated with an atmosphere of 2 PPM formaldehyde.
2.
Notes:
This will assure if the reading is below 2 PPM that the formaldehyde is below the
OSHA limit.
ALARM POINT AND TIME CONSIDERATION
1. The software will set the 2 PPM level as the initial alarm point. The alarm indication will
be turned on if the VOC sensor voltage is at or above the 2 PPM level for a given time
period, which will be user (lab manager) adjustable. The software will initially set this
time limit at 15 minutes.
2. During the 15-minute period, if the sensor voltage drops below the 2 PPM equivalent
level for more than 30 seconds the 15-minute timer will be restarted at 0 minutes if and
when the voltage climbs above the 2 PPM equivalent level again.
3. If the sensor voltage drops below the 2 PPM equivalent for 30 seconds or less and then
climbs above the 2 PPM equivalent level the 15-minute timer will continue counting up
without a reset.
USER ADJUSTMENT OF ALARM POINT AND TIME ABOVE
ALARM LIMIT
The user (Lab Manager) may adjust the alarm point parameters to accommodate lab specific
preferences. It is anticipated that this adjustment would only be in an increased alarm value to
offset normally present VOC fumes.
1. The user offsets allowed shall be:
Alarm Point
Alarm Time
Initial Value: 2 PPM
Initial Value: 15 Minutes
Minimum Allowed: 0%
Minimum Allowed: 1 Minute
Maximum Allowed: +40%
Maximum Allowed: 60 Minutes
2. The adjustment for alarm point and time shall be accessible by the lab manager as
shown below.
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