Nellcor WT-5200 User manual
Model WT-5200
Patient Warming System
Service Manual
To obtain information about a warranty, if any, contact Nellcor’s Technical Services Department
(1.800.635.5267, press 3), or your local Nellcor representative.
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Figuree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Warnings ...................................... ....... ...... ....... ...... ... ....... ...... ....... ...... ...... ....... .....1
Cautions .................................... ...... ....... ...... ....... ... ...... ....... ...... ....... ...... ....... ...... ..2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Intended Use ............................... ... ................................................. ... ... ... ............3
Manual Availability ................................................................................................3
Background Information ........................................................................................3
Safety Features ..........................................................................................4
Customized Warming Therapy ........ ..................................................4
Automatic Temperature Stepdown ........................ ............................4
Automatic Shutdown ......................................................................... 4
Warning Light ....................................................................................4
HEPA Filter .......................................................................................4
Wheel Locks ......................................................................................4
Symbols .................................... ................................................................ ............ 6
The WarmTouch Warming System Description .................. .......... ......... .......... .....7
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
HEPA Filter Replacement ...... ...............................................................................9
Hose Replacement .............................................................................................11
Power Cord Replacement ...................................................................................13
Nozzle Replacement ...........................................................................................15
Cleaning the WarmTouch Patient Warming System ..........................................15
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Thermostat Protection Check ............................................................. ... ... .... ... ...17
Output Temperature Check ................................................................................20
Safety Tests ........................................................................................................22
Disassembly Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Filter Cover Assembly Replacement ..................................................................23
Separating the Warming Unit Front and Rear Covers ........................................25
Front Cover Assembly Replacement ........................ .......................................... 28
Universal PCB Replacement ..............................................................................37
Heater Assembly Replacement ..........................................................................46
Duct Adapter Assembly Replacement ................... ... ... .... ... ... ... .... ... ... ... ... .... ... ...62
Rear Cover Assembly Replacement ............................ .......... .......... ......... ..........66
Spare Parts and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Ordering Information ...........................................................................................85
WarmTouch Replacement Parts and Accessories .............................................87
Manual Availability ..............................................................................................87
Packing for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Introduction .................................. ................................................................. ......89
Returning the WT-5200 ......................................................................................89
General Instructions ............................... ... ... .... ................................................ ...89
WT-5200 i
Contents
Repacking in Original Carton ..............................................................................89
Repacking in a Different Carton ..........................................................................91
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
WarmTouch Patient Warming System Specifications ........................................93
Transport and Shipping in Shipping Container ............................ ... .... ... ...93
Ground Integrity Test ................................................................................94
Earth Leakage Current Test .....................................................................94
Enclosure Leakage Current Test ..............................................................94
Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Control Panel ......................................................................................................95
Main Circuit Board ..............................................................................................96
DC Power Supply Circuit ....................................... ... ... ... .... ... ... ... ... .... ... ...96
Control Logic Circuit .................................................................................97
Automatic Temperature Stepdown ........................... ................................97
Temperature Control Circuit .............................. ....................................... 97
LCD Hour Meter .......................................................................................98
AC Power Section ..................................... ... .... ... ... ... ... .... ... ... ... ..........................98
Blower ....................................... ................................... .................................... ... 99
Heater .................................... ................................................................ ............. 99
Thermostat Protection .............................. ... .... ... ... ... ... .... ... ................................99
Over-Temperature Test Port ...............................................................................99
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
ii
Figuree
Contents
Figure 1: Cart Wheel Lock .............................................................................5
Figure 2: Model WT-5200 Front View ............................................................7
Figure 3: Model WT-5200 Back View ............................................................8
Figure 4: Operating Hours Meter ...................................................................9
Figure 5: Rear Panel Screws .......................................................................10
Figure 6: HEPA Filter ...................................................................................11
Figure 7: Back of Case ................................................................................12
Figure 8: Hose Retaining Wire .....................................................................13
Figure 9: Power Cord Routing .....................................................................14
Figure 10: Over-Temperature Test Port .........................................................18
Figure 11: WarmTouch High Temperature Setting ........................................19
Figure 12: Warning Light ................................................................................19
Figure 13: Output Temperature Setup ...........................................................21
Figure 14: Temperature Selection .................................................................21
Figure 15: Ground Stud .................................................................................22
Figure 16: Power Cord ...................................................................................24
Figure 17: Rear Panel Screws .......................................................................24
Figure 18: Power Cord ...................................................................................25
Figure 19: Power cord Removal ....................................................................26
Figure 20: Cover Screw Locations .................................................................27
Figure 21: Separated Covers .........................................................................27
Figure 22: Cable Harness Cable Ties-downs ................................................29
Figure 23: Front Cover Assembly ..................................................................29
Figure 24: Power Switch Removal .................................................................30
Figure 25: Cable Disconnect ..........................................................................30
Figure 26: Universal PCB Screws ..................................................................31
Figure 27: Universal PCB Lights ....................................................................32
Figure 28: Universal PCB Screws ..................................................................32
Figure 29: Cable Connections .......................................................................33
Figure 30: Power Switch Clips .......................................................................33
Figure 31: Front cover Assembly Component Locations ...............................34
Figure 32: Equipotential Ground ....................................................................35
Figure 33: Cable Harness Cable Ties-downs ................................................35
Figure 34: Cover Screw Locations .................................................................36
Figure 35: Power Cord Retaining Bracket .....................................................37
Figure 36: Universal PCB Connections .........................................................38
Figure 37: Universal PCB Screws ..................................................................39
Figure 38: Universal PCB Solid State Relay Assembly .............. ... ... ... .... ... ...40
Figure 39: Part of Universal PCB ...................................................................41
Figure 40: Universal PCB Alarm Jumper .......................................................42
Figure 41: Universal PCB Lights ....................................................................42
Figure 42: Universal PCB Screws ..................................................................43
Figure 43: Cable Connections .......................................................................43
Figure 44: Cable Harness Cable Ties-downs ................................................44
Figure 45: Cover Screw Locations .................................................................45
WT-5200 iii
Contents
Figure 46: Power Cord Retaining Bracket .....................................................46
Figure 47: Filter Removal ...............................................................................47
Figure 48: Blower Assembly Screws .............................................................48
Figure 49: Cable Harness Cable Ties-downs ................................................48
Figure 50: Front Cover Assembly ..................................................................49
Figure 51: Cable Disconnect ..........................................................................50
Figure 52: Duct Adapter Placement ...............................................................51
Figure 53: Blower Motor Removal .................................................................52
Figure 54: Blower Assembly Clips .................................................................52
Figure 55: Rubber Washer .............................................................................53
Figure 56: Heater Assembly ..........................................................................53
Figure 57: Heater Assembly Installation ........................................................54
Figure 58: Rubber Washer .............................................................................55
Figure 59: Blower Assembly Clips .................................................................55
Figure 60: Blower Assembly Screws .............................................................56
Figure 61: Duct Adapter Placement ...............................................................57
Figure 62: Cable Connections .......................................................................57
Figure 63: Front Cover Assembly ..................................................................58
Figure 64: Equipotential Ground Stud Wiring ......... .... ... ... ... .... ... ... ... ... .... ... ...59
Figure 65: Cable Harness Cable Ties-downs ................................................59
Figure 66: Cover Screw Locations .................................................................60
Figure 67: Filter Installation .................................. .......................... ................60
Figure 68: Filter Cover Installation .................................................................61
Figure 69: Power Cord Retaining Bracket .....................................................61
Figure 70: Thermistor Silicone .......................................................................63
Figure 71: Thermistor Removal .....................................................................63
Figure 72: Duct Adapter Removal ..................................................................64
Figure 73: Duct Adapter Placement ...............................................................64
Figure 74: Thermistor Position Within Duct Adapter ................................ ... ...65
Figure 75: Cover Screw Locations .................................................................66
Figure 76: Filter Removal ...............................................................................68
Figure 77: Warming Unit Mounting Clamps ................................................... 68
Figure 78: Separated Covers .........................................................................69
Figure 79: Front Cover Assembly ..................................................................70
Figure 80: Cable Disconnect ..........................................................................71
Figure 81: Thermistor Cable Removal ...........................................................71
Figure 82: Blower Assembly Screws .............................................................72
Figure 83: Blower Capacitor ..........................................................................73
Figure 84: Blower Motor Removal .................................................................74
Figure 85: Blower Assembly Clips .................................................................74
Figure 86: Rubber Washer .............................................................................75
Figure 87: Heater Assembly ..........................................................................75
Figure 88: Warming Unit Mounting Brackets .................................................76
Figure 89: Heater Assembly Installation ........................................................76
Figure 90: Rubber Washer .............................................................................77
Figure 91: Blower Installation ............................... .......................... ................77
Figure 92: Blower Screws ..............................................................................78
Figure 93: Thermistor Cable Installation ........................................................ 78
iv
Contents
Figure 94: Capacitor Installation ....................................................................79
Figure 95: Cable Connections .......................................................................79
Figure 96: Front Cover Assembly ..................................................................80
Figure 97: Equipotential Ground Stud Wiring ......... .... ... ... ... .... ... ... ... ... .... ... ...81
Figure 98: Cable Harness Cable Ties-downs ................................................81
Figure 99: Cover Screw Locations .................................................................82
Figure 100: Filter Installation ............................... .......................... ...................82
Figure 101: Filter Cover Installation .................................................................83
Figure 102: Power Cord Retaining Bracket .....................................................83
Figure 103: Spare Parts (Sheet 1) ...................................................................86
Figure 104: Spare Parts (Sheet 2) ...................................................................87
Figure 105: Packing .........................................................................................90
Figure 106: Keyboard Assembly ......................................................................95
Figure 107: Warning Light ................................................................................95
Figure 108: Remove Screws to Open Case ....................................................97
Figure 109: Hour Meter ....................................................................................98
Figure 110: 5200 Schematic Diagram ...........................................................101
WT-5200 v
Tables
Tables
Table 1: WT-5200 Symbols ........................ ... ... ... ... .... .....................................6
Table 2: HEPA Filter Replacement Equipment Required ...............................9
Table 3: Hose Replacement Equipment Required ........................................12
Table 4: Power Cord Replacement Equipment Required .............................13
Table 5: Equipment Required for Thermostat Protection Check ............. ... ...17
Table 6: Equipment Required for Output Temperature Check ......................20
Table 7: Replacement Parts and Accessories ..............................................85
Table 8: Model WT-5200 Blower Specifications ...........................................93
Table 9: Model WT-5200 Cart Specifications ...................... ..........................93
vi
Safety Information
Warnings
WARNING: Possible explosion haz ard. Do not use the WarmTouch® Model
WT-5200 Patient Warming System in the presence of flammable anesthetic
agents.
WARNING: Possible electrical shock hazard. To reduce electrical shock do
not remove back case. Servicing is only to be done by qualified personnel.
WARNING: Possible electric shock hazard. Grounding reliability can be
achieved only when the Warming System is connected to an equivalent socket
marked “HOSPITAL ONLY” or “HOSPITAL GRADE.”
WARNING: Possible fire hazard. Prevent the blanket material from coming
into contact with a laser or an electrosurgical active electrode; rapid
combustion could result.
WARNING: Possible burn hazar d. Do not apply heat directly to open
wounds. All patient’s wounds should be covered while using the warming
system.
WARNING: Possible patient bur ns . Us e caution and consider discontinuing
use on patients during vascular surgery when an artery to an extremity is
clamped. Do not apply the warming system to ischemic limbs. This could
possibly cause the patient to be burned.
WARNING: Possible patient bur ns . Us e caution and monitor closely if used
on patients with severe peripheral vascular disease. This could possibly cause
the patient to be burned.
WARNING: If a malfunction occurs in the warming system, discontinue use.
Notify your sales/service center of the malfunction. The unit must be serviced
by an authorized service technician.
WT-5200 1
Safety Information
WARNING: Possible patient burns. Do not warm patients with the warming
system hose only. Thermal injury may result. Always attach the hose to a
WarmTouch blanket before providing warming therapy.
WARNING: WarmTouch, CareDrapeTM, and CareQuilt® blankets are for
single patient use only.
WARNING: The warming system should not be operated in the presence of
electromagnetic fields that are greater than 3 volts/meter. This could cause
shutdown of the warming system by the fail-safe function within the
equipment.
WARNING: The warming system is not suitable for use during magnetic
resonance imaging (MRI) scanning. The warming system may affect the MRI
image.
Cautions
Caution: Federal (U.S.A.) law restricts the use of the warming system to sale by or
on the order of a physician.
Caution: Continuously monitor the patient's temperature. Reduce the air
temperature or discontinue therapy when normothermia is reached.
Caution: The warming system is fitted with an air filter; however, airborne
contamination should be considered when using the warming system.
Caution: If the warming system is mounted on the intravenous (IV) pole, it should
be installed with the top of the unit’s handle less than 76 cm (30 inches) ab ove the
floor to prevent the IV pole from tipping over.
Caution: If a malfunction occurs in the warming system, discontinue use. Notify
your sales/service center of the malfunction. Servicing is only to be done by
qualified personnel.
Caution: Ensure that the patient is dry or the warming system may be ineffective.
2
Introduction
Intended Use
The WarmTouch Model WT-5200 Patient Warming System (warming unit and
blanket) is intended for prevention and treatment of hypothermia. For example,
with the surgical patient, the patient in the pre-operative holding area, the
pregnant woman who shivers during epidural anesthesia, or any patient who is
uncomfortable in the cold critical care environment.
Manual Availability
The most recent revision of this manual is available on the Internet at:
http://www.mallinckrodt.com/respiratory/resp/serv_supp/productmanuals.html
Background Information
There are numerous ways of warming your patient, from cotton blankets to water
mattresses. Research has shown that low temperatures surrounding the patient are
a major factor contributing to hypothermia
patient with warm air and actively transfers heat across the skin. The result is to
achieve normal thermia.
In creating this warm customized pocket of air around the hypothermic patient,
Stagnant air, even if it is warm, does not work as an effective heat transfer
medium. Stagnant air acts as an insulator, preventing the boundary layer of
molecules next to the skin surface from transferring heat.
Forced air warming causes warmed air molecules to flow over cooler skin surface.
It is this active flow of warmed molecules that acts as a heat transfer medium.
With the warming system, air is warmed and delivered into a lightweight blanket
(CareQuilt or CareDrape Blanket) that rests over or under the patient. The
CareQuilt and CareDrape blankets have many small perforations on the
underside that allow air to exit the blanket and surround the patient.
1), 2)
. The warming system covers the
1) Morris RH, Wilkey BR. "The Effects of the Ambient Temperature on Patient Temperature
During Surgery Not Involving Body Cavities.” Anesthesiology 32:102-107, 1970.
2) Morris RH. “Influence of Ambient Temperature on Patient Temperature During Intraabdominal Surgery.” Annals of Surgery 173:230-233, 1971.
WT-5200 3
Introduction
Safety Features
The warming system is designed to give healthcare professionals more control
over patients' core body temperature. Several safety features of the warming
system make it safe and appropriate for such use. These features are described
below.
Customized Warming Therapy
Clinicians select temperature range setting at the onset of warming therapy to help
ensure the appropriate setting is selected for every patient.
Automatic Temperature Stepdown
The warming system provides a 45-minute temperature stepdown feature. When
the unit is operating in the high mode, air temperature will automatically drop to
medium after 45 minutes of continuous use. The temperature may be reset to high
mode by selecting high temperature on the unit front panel.
Automatic Shutdown
Warning Light
HEPA Filter
The automatic temperature controller and two back-up systems help to ensure
temperature will not reach excessive levels. If necessary, the back-up systems
automatically turn off the heater and illuminates the warning light. The warming
system heater will start producing heat when the warming system temperature
drops to approximately 34ºC to 37ºC.
When the warning light on the control panel is illuminated, it indicates that one of
the two thermostats has turned off the heater. The reason for the heater turn-off
should be investigated as soon as possible after use.
The system's High Efficiency Particulate Air Filter is 99.97% efficient at
0.3-micron particle size.
Wheel Locks
4
The cart is equipped with two wheel locks. The wheel locks prevent the cart from
moving while in use. The wheel locks must be released when moving the cart.
Introduction
Press the wheel lock arm down to lock the wheel. Lift the wheel lock arm to
release the wheel lock. See Figure 1.
Figure 1: Cart Wheel Lock
WT-5200 5
Introduction
Symbols
The symbols identified in Table 1 are the symbols used on the WT-5200 and all
WT-5200 labeling.
Table 1: WT-5200 Symbols
Attention symbol, consult
accompanying documentation
Temperature Control
Ambient Air
Temperature Control
Low
° C)
(30-34
Temperature Control
Medium
(36-40
° C)
Temperature Control
High
° C)
(42-46
I Power On
0 Power Off
Protection Class I
Protection Type BF
6
The WarmTouch Warming System Description
The warming system (Figure 2 and Figure 3) and CareQuilt and CareDrape
blankets are intended to prevent and treat hypothermia. For example, with the
surgical patient, the patient in the pre-operative holding area, the preg nant woman
who shivers during epidural anesthesia, or any patient who is uncomfortable in the
cold critical care environment.
Introduction
1 — Hose 4 — Power Cord
2 — Main Power Switch 5 — Hour Meter
3 — Nozzle 6 — Control Panel
Figure 2: Model WT-5200 Front View
WT-5200 7
Introduction
1 — Over-Temperature Test Port 4 — Warning Label
2 — Bed Hook Bracket 5 — Nozzle Strap with Clip
3 — Filter Cover 6 — Instruction Label
Figure 3: Model WT-5200 Back View
8
Routine Maintenance
Caution: The institution should follow local governing ordinances and recycling
instructions regarding disposal or recycling of filter and device components or end
of life of the product.
HEPA Filter Replacement
The warming system filter should be replaced after every 2000 hours of use.
Contact Nellcor’s Customer Service Department (1.800.635.5267, press 3) or
your local Nellcor representative to purchase new filters. The correct filter will be
sent to your hospital for installation.
Caution: Only qualified hospital personnel should replace the air filter.
The warming system total operating hours and the date of installation should be
recorded on the new filter label and on the unit label when the filter is installed.
See Figure 4 for the location of the Hour Meter on the warming system.
Note: The warming system must be operating to read the total operating hours
meter.
Table 2: HEPA Filter Replacement Equipment Required
Equipment Description/Use
Phillips Screwdriver #2, removing screws
1 — Operating Hours Meter
Figure 4: Operating Hours Meter
WT-5200 9
Routine Maintenance
Warning: Do not operate the warming system with the back cover removed.
1. Write the date and total hours of operation of the warming system on the new
filter label and unit label.
2. Unplug the warming system.
3. Lay the warming system on the front cover.
4. Unwrap the power cord from the rear of the warming system.
5. Remove the three screws from the rear of the warming system. See Figure 5.
10
Figure 5: Rear Panel Screws
6. Remove the warming system back panel.
Routine Maintenance
1 — HEPA Filter 2 — Power Cord Stain Relief
Figure 6: HEPA Filter
7. Remove the filter. See Figure 6.
8. Place the new filter into the warming system.
9. Ensure that the power cord’s female connector is fully seated into the
10. Place the warming system back panel on the case and insert the power cable
11. Align the back case with the three screw holes in the filter and install the three
Hose Replacement
If the warming system hose is damaged, contact Nellcor’s Technical Services
Department (1.800.635.5267, press 3) or your local Nellcor representative to
obtain a replacement hose. The hose for the warming system is made of plastic
reinforced with wire.
warming system case.
into the power cable slot on the bottom of the case.
screws holding the back case to the unit.
Warning: Only qualified hospital personnel should replace the hose.
WT-5200 11
Routine Maintenance
Table 3: Hose Replacement Equipment Required
Equipment Description/Use
Phillips Screwdriver #2, removing screws
Needle-Nose Pliers Bending hose wire
1. Unplug the warming system.
2. Place the warming system on a workbench with the back of the unit facing
you.
3. Remove the 7 screws holding the case together. See Figure 7.
12
Figure 7: Back of Case
4. Open the top of the case assembly far enough to access the hose and the hose
retaining wire. See Figure 8.
1 — Hose Retaining Wire
Figure 8: Hose Retaining Wire
Routine Maintenance
5. Straighten the hose retaining wire.
6. Remove the hose from the warming system.
7. Install the new hose. Ensure that the hose retaining wire is threaded through
the hose retaining wire hole.
8. Bend the hose retaining wire to ensure that the hose does not detach from the
warming system.
9. Close the warming system case.
10. Install the 7 screws to hold the case together. See Figure 7.
Power Cord Replacement
The warming system is equipped with a detachable power cord. If the power cord
is damaged, contact Nellcor’s Technical Services Department (1.800.635.5267,
press 3) or your local Nellcor representative.
Caution: Only qualified hospital personnel should replace the power cord.
Table 4: Power Cord Replacement Equipment Required
Equipment Description/Use
Allen Wrench 3/32 inch, loosening retaining bracket
WT-5200 13
Routine Maintenance
1. Unplug the warming system power cord from the AC outlet.
2. Place the warming system unit on a workbench with the bottom of the unit
facing you.
3. Unwind the power cord from the warming unit case.
Caution: The power cord retaining bracket screws have retaining nuts. Do not
unscrew the screws enough to damage the retaining nuts or screws.
4. Loosen the power cord retaining bracket screws enough to pull the bracket
away from the power cord connector. See Figure 9.
14
1
— Power Cord Retaining Bracket Screws 3 — Power Cord Connector
— Power Cord Retaining Bracket 4 — Power Cord Routing
2
Figure 9: Power Cord Routing
5. Disconnect the power cord connector from the warming unit.
6. Remove the power cord from the power cord routing bracket.
7. Connect the new power cord connector to the warming unit.
8. Insert the power cord into the power cord routing bracket. It may be necessary
to use a screwdriver to pry apart the power cord routing bracket, to aid
insertion.
9. Tighten the power cord retaining bracket screws.
Nozzle Replacement
If the nozzle is damaged, contact Nellcor’s Technical Services Department
(1.800.635.5267, press 3) or your Nellcor representative. The nozzle is held in
place by four clips on the hose assembly. Pu ll and twist the nozzle to remove it. To
replace the nozzle, push the new nozzle over the clips on the hose assembly.
Cleaning the WarmTouch Patient Warming System
Caution: Do not spray, pour, or spill any liquid on the warming system, its
accessories, connectors, switches, or openings in the case.
For surface-cleaning and disinfecting, follow your institution's procedures or:
• The warming system may be surface-cleaned by using a soft cloth
dampened with either a commercial, nonabrasive cleaner or a solution of
70% alcohol in water, and lightly wiping the surfaces of the monitor.
Routine Maintenance
• The warming system may be disinfected using a soft cloth saturated with
a 10% solution of chlorine bleach in tap water.
WT-5200 15
Blank Page
Performance Verification
Thermostat Protection Check
This procedure checks to ensure that the thermostat protection controls are
working properly. This procedure should be performed before returning the
warming system into service. Table 5 lists the equipment required for the
thermostat protection check.
No calibration of the thermostat protection is required or possible. If the test time
or temperatures are outside the allowable range, factory service is required.
Contact Nellcor’s Technical Services Department (1.800.635.5267, press 3) or
your local Nellcor representative.
Table 5: Equipment Required for Thermostat Protection Check
Equipment Description/Use
Temperature Probe
Tape To hold the temperature probe in place
Stopwatch Manual or electronic
Jumper wire with alligator
clips
Phillips Screwdriver #2
WarmTouch CareDrape
Lower Body Blanket
1. Lay the temperature probe beside the warming system nozzle at the end of the
hose and bend approximately 1.5 inches (4 centimeters) of the temperature
probe into the nozzle opening.
2. Position the tip of the temperature probe so that it is centered in the middle of
the nozzle opening and is inside the nozzle approximately 1 to 2 inches (2.5 to
5 centimeters).
3. Tape the probe in place.
Mon-a-Therm
probe, or equivalent, and temperature
monitor with an accuracy of ±0.2 degrees C
3 to 12 inches (8 to 30 centimeters) long,
alligator clip at each end, 12 gauge minimum
To complete patient warming system
®
subcutaneous temperature
4. Connect the probe to the temperature monitor.
5. Connect the nozzle to the blanket.
6. Unplug the warming system.
WT-5200 17
Performance Verification
7. Loosen the over-temperature test port screw. See Figure 10.
8. Slide the over-temperature test port cover to the side.
1 — Over Temperature Test Port
Figure 10: Over-Temperature Test Port
WARNING: Possible Patient Injury. Connecting the jumper wire disables
(shorts out) the thermistor that is part of the temperature control system and
is only for use by qualified personnel.
9. Connect the jumper wire across the two terminals in the over-temperature test
port.
10. Plug in the warming system and turn it on.
18
Performance Verification
11. Select the high temperature setting. See Figure 11.
1 — High T emperature Setting
Figure 11: WarmTouch High Temperature Setting
12. When the monitored temperature exceeds 46 degrees C, start the stopwatch.
1 — Warning Light
Figure 12: Warning Light
13. When the Warning Light indicator lights, stop the stopwatch. See Figure 12.
14. The stopwatch should indicate 10 minutes or less, and the temperature
monitor should not exceed 66 degrees C.
15. Turn off the warming system and unplug it.
WARNING: Possible Patient Injury. Connecting the jumper wire disables
(shorts out) the thermistor that is part of the temperature control system and
only for use by qualified personnel. The jumper wire must be removed.
16. Remove the jumper wire from the over-temperature test port. See Figure 10.
17. Close the over-temperature test port and tighten the screw.
18. Disconnect the warming system from the blanket.
19. Allow the warming system to cool for 30 minutes before using the unit on a
patient.
WT-5200 19
Performance Verification
Output Temperature Check
This procedure measures the warming system output air temperature at the input
to the blanket. The output temperature should be measured before returning the
Warming System into service. Table 6 lists the equipment required for the
thermostat protection check.
No calibration of the temperature control circuit is required or possible. If the test
temperatures are outside the allowable range, factory service is required. Contact
Nellcor’s Technical Services Department (1.800.635.5267, press 3) or your local
Nellcor representative.
Table 6: Equipment Required for Output Temperature Check
Equipment Description/Use
T emperature Probe Mon-a-Therm subcutaneous temperature probe,
or equivalent, and temperature monitor with an
accuracy of ±0.2 degrees C
Tape To hold the temperature probe in place
WarmTouch CareDrape
Lower Body Blanket
1. Lay the temperature probe alongside the warming system nozzle at the end of
the hose and bend approximately 1.5 inches (4 centimeters) of the temperature
probe into the nozzle opening.
2. Position the tip of the temperature probe so that it is centered in the middle of
the nozzle opening and is inside the nozzle approximately 1 to 2 inches (2.5 to
5 centimeters).
3. Tape the probe in place.
4. Connect the probe to the temperature monitor.
5. Connect the nozzle to the blanket.
6. Extend the warming system hose to the configuration shown in Figure 13.
To complete patient warming system
20
1 — 14 to 16 inches 2 — 32 to 34 inches
Figure 13: Output Temperature Setup
7. Turn on the warming system.
Performance Verification
8. Select the low temperature range. See Figure 14.
1 — High Temperature 3 — Low Temperatu re
2 — Medium Temperature 4 — Ambient T e mp erature
Figure 14: Temperature Selection
9. Allow the temperature to stabilize. The temperature monitor should indicate
30.0 ºC to 35.0 ºC.
10. Select the medium temperature range.
11. Allow the temperature to stabilize. The temperature monitor should indicate
36.0 ºC to 41.5 ºC.
12. Select the high temperature range.
13. Allow the temperature to stabilize. The temperature monitor should indicate
42.0 ºC to 48.0 ºC.
WT-5200 21
Performance Verification
Safety Tests
14. Turn off the warming system.
15. Disconnect the warming system nozzle from the blanket.
16. Remove the temperature probe from the warming system nozzle.
The warming system is provided with a ground stud to allow safety testing
without opening the case.
1 - Ground Stud
Figure 15: Ground Stud
The warming system meets the standards of CSA C22.2 No. 125 (Risk Class 2)
and UL 544.
Applicable tests for these standards are listed below. Technicians should be
familiar with the standards applicable to their institution and country. Test
equipment and its application must comply with the applicable standard.
• Ground Integrity. See page 94 for test values.
• Earth Leakage Current. See page 94 for test values.
• Enclosure Leakage Current. See page 94 for test values.
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