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3
ENGLISH
Symbol Guide
Federal law (USA) restricts
this device to sale on or by
the order of a physician
Consult Instructions
For Use
Authorized Representative
in the European
Community
Non
sterile
Non-sterile
Manufacturer
Contains no
Polyvinyl Chloride
-40°C
(-40°F)
60°C
(140°F)
Storage Temperature
Range
Not Manufactured with
Natural Rubber Latex
Designed for Blenders
Warning
Made in USA
Do Not
Caution
1.0 PRODUCT OVERVIEW
1.1 Description
Maxtec DFB flowmeters are designed and calibrated to provide increased accuracy compared
to standard flowmeters, when used on air/oxygen blender outlets. By utilizing dual-scale
graduations, the flowmeters provide two flowmeters in one for increased accuracy at lower
flows. The flowmeters feature high-quality acrylic block bodies and precision valves. Each
flowmeter comes equipped with a DISS outlet and DISS adapter for neat and compact attach-
ment to the side of the blender.
1.2 Intended use
The flowmeter is intended for use as a secondary flowmeter for an air/oxygen blender, such
as the Maxtec MaxBlend 2, and is to be used by physicians, respiratory therapists and other
authorized hospital personnel to administer selected doses of medical gases to a patient.
2.0 SPECIFICATIONS
2.1 Flow Range Accuracy Chart
MODEL
FLOW
GRADUATIONS
ACCURACY
R219P99-400
0-3 LPM
0.1 (0.1-1) LPM
0.5 (1-3) LPM
± 0.5 LPM
R219P79-400
0-15 LPM
0.25 (0.5-3) LPM
1 (5-15) LPM
0.5-3: ± 0.5 LPM
5-15: ± 10% of indicated value
R219P88-400
0-30 LPM
0.25 (0.5-3) LPM
2.5 (5-30) LPM
0.5-3: ± 0.5 LPM
5-30: ± 10% of indicated value
R219P87-400
0-70 LPM
1 (2-15) LPM
5 (15-70) LPM
2-4: ± 0.5 LPM
5-70: ± 10% of indicated value
2.2 Transport/Storage Requirements
-40 °F (-40 °C) to 140 °F (60 °C)
NOTE:
Storage/transport outside the specified range may cause damage to the flowmeter.
The above flowmeter models are calibrated for air/oxygen blenders at 70°F (21°C) and stan-
dard atmospheric pressure with inlet pressures at 50 PSI and 60% O₂. Specifications are subject
to change without prior notice.
3.0 OPERATING INSTRUCTIONS
3.1 General Operation
1. Remove the air and oxygen line pressure to the air/oxygen blender and ensure
the valve to the flowmeter is closed.
2. Apply a thread sealant that is appropriate for medical oxygen use to the male NPT
thread of the supplied 90 degree NPT to DISS adapter.
3. Use a backing-wrench to secure the female NPT fitting on the back of the
flowmeter while hand-tightening the male NPT thread of the 90 degree NPT to
DISS adapter into the female NPT fitting.
4. With the backing-wrench still in place, tighten the 90 degree NPT to DISS adapter
fitting at least one full revolution. Continue to tighten the fitting until it is aligned
properly for the desired attachment configuration on the air/oxygen blender
output.
5. Attach the flowmeter to the air/oxygen blender output using the DISS connection.
The flowmeter must be mounted vertically for accurate measurements.
6. Restore pressure to the air/oxygen blender and verify that the float ball is at the
very bottom of the flow tube.
7. NOTE: If the float is not resting at the bottom of the flow tube, the product is
leaking; consult the “TROUBLESHOOTING” Section 4.0.
8. Adjust flow:
To increase- Turn knob counterclockwise
To decrease- Turn knob clockwise
9. Set the flow by aligning the center of the float ball with the indicator lines on the
flow tube. Adjusting flow beyond the last calibrated indicator line will result in an
undetermined flow.
4.0 TROUBLESHOOTING
4.1 Troubleshooting Table
PROBLEM
CAUSE
REMEDY
Will not shut off
Leak
Defective valve
Consult your
provider or Maxtec
Sticking float ball or unable
to set desired flow
Debris in flow tube
Knob will not turn
Valve seized
5.0 RECOMMENDED MAINTENANCE
5.1 Cleaning Instructions
•
Depressurize and disconnect all connections before cleaning.
•
Clean exterior surfaces of the flowmeter with a cloth dampened with a mild
detergent and water.
•
Wipe dry with a clean cloth.
CAUTION:
Do Not Autoclave