Max-550E Oxygen Sensor; Setup Procedure; Battery Installation/Replacement - Maxtec MaxO2 ME+p Instructions For Use Manual

1
t
y
r
e
w
q
1.4 MAX-550E Oxygen Sensor
The MAX-550E is a galvanic, partial pressure sensor that is specific to oxygen. It consists of
two electrodes (a cathode and an anode), a FEP membrane and an electrolyte. Oxygen dif-
fuses through the FEP membrane and immediately reacts electrochemically at a gold cathode.
Concurrently, oxidation occurs electrochemically at a lead anode, generating an electrical cur-
rent and providing a voltage output. Electrodes are immersed in a unique gelled weak acid
electrolyte which is responsible for the sensors long life and motion insensitive characteristic.
Since the sensor is specific to oxygen, the current generated is proportional to the amount of
oxygen present in the sample gas. When no oxygen is present, there is no electrochemical
reaction and therefore, negligible current is produced. In this sense, the sensor is self-zeroing.
CAUTION: The MAX-550E oxygen sensor is a sealed device containing a mild acid electro-
lyte, lead (Pb), and lead acetate. Lead and lead acetate are hazardous waste constituents. Be
sure to dispose of expired sensors in accordance with hospital, local, state, and federal regula-
tions, or return to Maxtec for proper disposal or recovery.
CAUTION: Dropping or severely jarring the sensor after calibration may shift the calibra-
tion point enough to require recalibration.
CAUTION: The flow diverter for the sensor is for use with flowing gases only.
DO NOT use the diverter when performing static sampling, such as in incubators, oxygen
tents, oxygen hoods, etc.
2.0 SETUP PROCEDURE
2.1 Battery Installation/Replacement
All MaxO ME+p units are powered by four, AA, alkaline batteries (4 x 1.5 Volts) and are shipped
2
without the batteries installed. The battery compartment is accessible from the back side of the
unit. Batteries should be changed by qualified service personnel. Use only brand name batter-
ies. Replace with four AA batteries and insert per orientation marked on the device.
WWW.MAXTEC.COM • (800) 748-5355
3 4
2
5
l
6
k
7
j
h
8
9
When batteries are installed in the MaxO
ments of the LCD readout are turned on for approximately 2 seconds. The audio buzzer sounds
and the high and low alarm LEDs are illuminated. When the diagnostic test is completed suc-
cessfully, the word "CAL" will display and then automatically initiate a calibration.
WARNING: Battery replacement by inadequately trained personnel could result in a
safety hazard. The MaxO
batteries are removed or replaced. Ensure that the sensor is exposed to either 20.9% oxygen
(room air) or 100% oxygen when changing the batteries to avoid mis-calibration.
To install the batteries:
1. Release the thumb screw by turning it counter-clockwise until it pops out.
2. Install the four, AA, alkaline batteries (4 x 1.5 Volts) in the unit, observing the
orientation shown on the plastic inside the compartment.
3. Slide the battery compartment cover back onto the case. Press in on the thumb screw
while turning it clockwise until it engages the thread in the enclosure. Turn until it is
lightly tightened.
WARNING: Electrical shock or damage to the equipment may occur if an inappropriate
external power supply is used. Maxtec recommends using only the Maxtec approved external
power supply as listed in Section 10.0 Spare Parts and Accessories.
To protect the unit from potential leaky battery damage always remove batteries when the
unit is going to be stored (not in use for 30 days or more) and replace dead batteries with
recognized name brand AA Alkaline batteries.
7
MaxO2 ME+p Display
g d
f s
ME+p, the unit initiates a self diagnostic test. All seg-
2
ME+p will automatically perform a new calibration any time the
2
DO NOT over-tighten.
u
i
o
p
a
ENGLISH