SAROS Service Bulletin

SERVICE
BULLETIN
PN: 21145152

RELEASE DATE:

April 19th, 2017

REVISED DATE:July 10, 2017 (Revision B), February 22, 2019 (Revision C), July 15, 2019 (Revision D), August30, 2019 (Revision E)

MODEL:		

ISSUE:		

NOTES:SAROSTM Oxygen System
SAROS Performance Verification Test and Updated Routine Maintenance Schedule
The below performance verification test procedure and updated routine maintenance schedule arebeing released as an addendum to the SAROS Operator & Service Manual (PN 9735).
The performance verification test is intended to verify overall functionality of the SAROS systemupon initial receipt, any time a problem is suspected, and at regular maintenance intervals. The
routine maintenance schedule is intended to help ensure proper performance of the device.				CONTACT: For any technical questions or concerns, contact Technical Service:					USA: 800-482-2473					techservice.global@caireinc.com					Europe: +44 1344 403100					techservice.global@caireinc.com							For ordering information or general inquires, contact Customer Service:					USA: 800-482-2473					customerservice.usa@caireinc.com					Europe: +44 1344 403100					customerservice.europe@caireinc.com

Copyright © 2019 CAIRE Inc. CAIRE Inc. reserves the right to discontinue its products, or change the prices, materials, 		equipment, quality, descriptions, specifications and/or processes to its products at any time without prior notice and with nofurther obligation or consequence. All rights not expressly stated herein are reserved by us, as applicable.

PN 21145152 Rev E

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SAROS Service Bulletin

SAROS PERFORMANCE VERIFICATION TESTNOTE: The entire verification procedure is recommended to be completed after repairs to verify overall functionality of the unit.

Verify functionality of the SAROS using the following procedures. The performance verification test shall be performed upon initial receipt of
the SAROS, any time a problem is suspected, and at regular 6 month intervals. It may be performed at more frequent intervals if required by theequipment provider. It is suggested that these steps be performed in the order listed for efficiency and accuracy.
A. General Operation Test
1) Install the SAROS battery.
2) Use an external (AC or DC) power cord to connect the SAROS to external power. Verify the power cord connects securely to thereceptacle on the SAROS.
NOTE: The battery is not fully charged upon initial receipt of the SAROS. If testing a new unit, this will begin the battery charging process. Reference steps 7-8 to verify proper battery charging.

3) Press and hold the “ON/OFF” button for 3 seconds to power on the SAROS.
NOTE: Before powering on, ensure the SAROS is in a well-ventilated area and that the air inlet and exhaust vent are not obstructed.

4) Verify the audible alarm sounds upon start-up and the screen defaults to display a flow setting of C3.
5) Allow the unit to run for a minimum of 5 minutes to reach its performance specifications. Afterthe warm-up period, verify that only the green light remains illuminated and there are no audiblealarms.

6) Press the utility button once and verify that there are no active alarms. The display screen will
read “AC = NONE” if no alarms are active.

7) Verify that the battery icon is visible on the right side of the screen.

8) Verify that the battery is charging. The battery icon bars will move in a waterfall fashion whilecharging. If the battery icon is not moving, verify if the battery is already fully charged. A fully
charged battery will have a completely dark icon with all bars filled.
Half Charged

Fully Charged9) Verify the functionality of the increase and decrease flow buttons. Starting atflow setting C3, press the decrease flow button and verify the screen reads C2.
Press the increase flow button and verify the screen changes back to C3.
NOTE: It is normal for the motor to speed up or slow down with each flow adjustment.
Decrease flow button

Increase flow button

PN 21145152 Rev E

Page 2 of 6SAROS Service Bulletin
10) Verify the functionality of the pulse flow mode button. Press the button and verify the device
toggles between a continuous flow setting (C) and pulse flow setting (P). The C & P are displayedon the far left side of the screen.

11) Verify the functionality of the no breath alarm. Switch to a pulse flow setting and do not attach any tubing to the outlet. Within
60 seconds of no breath detected, verify the system automatically changes to continuous flow. This is a patient safety measure.
12) Verify the unit runs on battery power. Disconnect the AC power supply and allow the SAROS to run for approximately
60 seconds. Verify the unit continues to run without interruption and that the battery icon is still displayed on the screen.
13) Verify the no battery alarm. Remove the battery with the AC power still disconnected and verify that an audible alarm sounds
and the red light is visible.
14) Within 5-10 seconds, reinstall the battery and verify the SAROS restarts automatically. Once the SAROS restarts, re-connect theexternal power as well to resume battery charging.

B. Flow and O2 Concentration Test
Connect the SAROS to a testing station per the diagram shown below:

SAROS

Testing device that includes aflow meter & O2 Monitor.
Example – (VT PLUS HF Gas FlowAnalyzer manufactured by FLUKEBiomedical)

Vent toatmosphere

NOTE: If testing concentration or flow rate at multiple settings, allow a 5 minute stabilization period between changing the flow rate prior to taking any test readings.
NOTE: The SAROS is BTP compensated. If measuring concentration and/or flow with a device that is non-Argon compensated and non-BTP compensated, an additional 0.10 LPM should be added to the flow rate recordedby the testing equipment. The VT PLUS HF Gas Flow Analyzer manufactured by FLUKE Biomedical is not BTP or Argon compensated.
NOTE: Be sure to use standard oxygen-compatible tubing. The tubing from SAROS to the testing device should be a single continuous piece with no restrictions in line.

1) Verify continuous flow settings C3 and C2 using the following procedure:a) Turn on the SAROS and set the flow to C3 (3.0 LPM). Allow the unit to run for a minimum of 5 minutes to stabilize beforetesting.
b) Verify the O2 concentration is within 90-96% and record the reading.
c) Record a 60 second running average for the flow rate. Verify the 60 second average is within 2.70 - 3.30 LPM. If using a
non-Argon or Non-BTP compensated measuring device, verify the 60 second average is within 2.60 – 3.20 LPM.
d) Adjust the flow setting to C2 (2.0 LPM). Allow the unit to run for a minimum of 5 minutes to stabilize before testing.
e) Verify the O2 concentration is within 90-96% and record the reading.
f ) Record a 60 second running average for the flow rate. Verify the 60 second average is within 1.80 - 2.20 LPM. If using a
non-Argon or Non-BTP compensated measuring device, verify the 60 second average is within 1.70 - 2.10 LPM.

PN 21145152 Rev EPage 3 of 6

SAROS Service Bulletin
Note: it is not required to test flow and concentration at 1 LPM for performance verification. This is not a typical clinical use case.

2) Verify functionality of the device in pulse flow mode using the following procedure:a) Adjust the SAROS to a setting of P48 (48mL).
b) Trigger a simulated breath by folding and pinching the tubing* running from the SAROS to the testing device. Verify
that a breath is triggered by the light blinking adjacent to the pulse flow mode button.
* Other acceptable procedures to trigger a breath may include connecting a tee to a breath simulator (syringe, jet venturi, nasal cannula, etc.). If you are using a tee, the tubing to the breath simulation device should
not exceed 2 inches in length.

c) Note and record the bolus size in mL of each breath. Repeat five times. Average the five bolus measurements and record theaverage reading. You may need to “ZERO” the testing device between triggering a simulated breath.
d) Adjust the SAROS to a setting of P96 (96 mL).
e) Repeat steps B & C for the P96 setting.
C. Battery Run Time Test
1) Test battery run time using the following procedure:a) Fully charge the battery via AC power by leaving it connected to AC power for a minimum of 1 hour. After 1 hour,verify the power cartridge status indicator is fully illuminated and no longer displays a waterfall motion.
b) Disconnect the AC power. Power the SAROS on at C3 (3.0 LPM) and start a timer.
c) Allow the unit to continue to run until it shuts off.
d) Once the unit shuts off completely, stop the timer and record the battery duration.
e) Verify that the time recorded is >24 minutes
NOTE: The nominal capacity of a new battery is 30 minutes at setting C3. A battery is considered within its useful life if its duration is 80% of the nominal capacity of a new battery (24 minutes at C3).

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SAROS Service Bulletin
SAROS PERFORMANCE VERIFICATION CHECKLISTSAROS Serial Number:
Hours of Operation:

Date of Testing:A. General Operation Test

PassFailAcceptable Range

Recorded Reading

1) Battery installs properly
2) External power cord (AC or DC) connects securely
3) Unit powers on after holding ON/OFF button for 3 seconds
4) Audible alarm sounds upon start-up5) 5-minute warm up period complete with no audiblealarm6) Utility Mode shows no active alarms after 5-minutewarm up7) Battery icon visible on screen8) Battery is charging or already fully charged
9) Increase and decrease flow buttons are functional
10) Pulse flow mode button is functional11) No breath alarm is functional
12) Unit runs on battery power13) No battery alarm is functional
14) Automatic re-start when power is reconnected

B. Flow and O2 Concentration
Test1) Continuous Flow Setting Verification
C3 (3.0 LPM) ) O2 Concentration

90 - 96 %C3 (3.0 LPM) flow -- 60 second average reading1

Argon-CompensatedTesting Device: 2.70 3.30 LPM

C2 (2.0 LPM) ) O2 Concentration

90 - 96 %C2 (2.0 LPM) flow -- 60 second average reading1

Argon-CompensatedTesting Device: 1.80 2.20 LPM

Non Argon-Compensated Testing Device: 2.60 - 3.20 LPM

Non Argon-Compensated Testing Device: 1.70 - 2.10 LPM

2) Pulse Flow Mode Verification
P48 (48 mL) -- 5 bolus average reading

40.8 - 55.2 mL

1:

2:

3:

4:

5:

Avg:

P96 (96 mL) -- 5 bolus average reading

81.6 - 110.4 mL

1:

2:

3:

4:

5:

Avg:

C. Battery Run Time Test
C3 (3.0 LPM)

Acceptable Range

Recorded Reading> 24 minFootnotes:(1) The SAROS is BTP compensated. If measuring concentration and/or flow with a device that is non-Argon compensated and non-BTP compensated, the acceptable range of the device readings will be reduced by 0.1 LPM.

Technician Name (print): _______________________________________
Technician Signature: _________________________________________PN 21145152 Rev E

Date: _______________________

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SAROS Service Bulletin
ROUTINE MAINTENANCE
Below is the acceptable schedule for routine maintenance recommended by the manufacturer.
Maintenance StepFrequency

Clean Air Inlet Filter

weekly (If in use, not required if in storage.)

Run device and fully drain SAROS battery

3 months*

Air Inlet Filter Replacement

6 months, or as needed

HEPA Filter

6 months, or as needed

Performance Verification Check

6 months, or when a problem is suspected

Replace 9-volt battery

as needed*Three month recommendation is based on a climate-controlled storage environment. For other storage conditions, contact CAIRE Technical Support at
1-800-482-2473.

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