9
Error Codes
The most common error code is Error 4. The meter will display
this error code on the screen if the battery voltage is too low.
To replace the battery, unscrew the back area on the meter.
Then use a pair of tweezers to gently remove the battery and
replace it with a new one. Screw the back cover back on the
meter, but be careful not to over-tighten as it can affect the
LCD screen.
10
Me
mory
• 99 manually stored data
points
•
Automatically store 99
consecutive 30 minute
averages
• 99 daily averages
Diffusion Head
• 3.5 cm tall; 3.5 cm diameter
• 125 mesh screen
•
Creates air pocket
Flow-Through Head
•
3.2 cm long by 3.2 cm
diameter
•
1/8" barbed adapters
• For hose connections
Mass
•
Meter: 80 g
•
Sensor and wire: 175 g
Range
• 5 to 100% O
2
Response Time
•
14 seconds
Stability
• ± 0.1% O
2
under stable
atmospheric conditions
Repeatability
• ± 0.1% O
2
Specifications
Input Power
•
CR2320
3 V coin cell battery
Operating Environment
•
0 to 50 C
• < 90% non-condensing
relative humidity up to 30 C
• < 70% relative humidity from
30 to 60 C
• 60 to 150 kPa
Display
•
4.2 by 2.8 cm
Meter Dimensions
•
11.8 by 5.9 by 1.4 cm
Gas Effect
•
CO
2
, CO, NO, NO
2
, H
2
S, H
2
,
CH
4
- No effect
• NH
3
, HCI, C
6
H
6
(Benzene) -
<1%
Cable
•
2 meters of shielded, twisted-
pair wire
• Foil shield
• Santoprene jacket
•
Longer cable lengths are
available in multiples of 5
meters
Warranty
• 1 year against defects in
materials and workmanship
www.apogeeinstruments.com
435.792.4700
Fax: 435.787.8268
Characteristics
Zero Offset
The mV output in ultra-pure nitrogen gas (0.000% O
2
)
is typically 2% of the output in 20.95% O
2
. Precise
measurements of hypoxic and anaerobic conditions can be
made by making a periodic zero calibration of the sensor with
ultra-pure nitrogen gas.
Life Expectancy
The life expectancy of the sensor is expressed in %-follows:
[Oxygen Concentration (%) x Exposure Time (hours)]
Accordingly, the life of an Apogee oxygen sensor is 900,000
hours or approximately 5 years of continuous use at 20.95%
oxygen at 20 C.
Storage Temperature
The life of the sensor can be extended by storage at a lower
temperature. For example, a sensor stored at 0 C will have a
life expectancy approximately twice that of a sensor stored
at 20 C. Below -20 C the electrolyte will freeze. This does
not damage the sensor, but to resume measurement the
electrolyte must be thawed. Maximum storage temperature is
60 C.
Shock and Vibration
The sensor is resistant up to 2.7 G of shock. However, vibration
may influence the sensitivity of the sensor and should be
minimized.
