Spot Vital Signs Monitor Series 420 Service Manual Rev K March 2007

Service Manual

iii

Revision Information Date

ECN #

Revision Description

Originator Approval

3/31/01

A

Introduction of Service Manual

JDB

JDB

12/17/01

B

Correction made to Section 1 regarding temperature accuracy, Section 2 regarding part numbers, Section 3 regarding error codes, and updates to the drawings

JDB

JDB

9/12/02

C

Added New PCB layout and schematic for Spot Extensions. JDB Added tool SRC-MAX to tool list in Section 2.3. Removed old PCB and Old SpO2 PCB and replaced with new Main PCB and New SpO2 PCB in section 2.4. Changed section 4.7 to cover both Spot and Spot Extensions SpO2 PCB removal and replacement. Changed section 5.8 to cover both Spot and Spot Extension SpO2 testing. General Spelling and grammar clean up.

JDB

02/02/03

5-45656

D

Arden document release to SKF. Updated USA Service Center contact information.

JDB

DLK

05/01/03

5-45893

E

Correction to tools required for service. Corrected General Information phone numbers.

DLK

DLK

09/16/03

5-46550

F

Updates repair BOM. Updated Accessories. Re-formated manual DLK to meet Welch Allyn service manual work instructions.

DLK

12/12/03

5-46989

G

DLK Correction to page numbering and to voltage calibrations. Reformatted all systems of measurement to meet NIST Standards. Reformatted Appendix E. Corrected grammar and punctuation. Revised service and support details in Section 1. Removed schematics.

RJS

3/9/06

1007069

H

Removed references to Nellcor motion tolerance.

AMJ

JPK

3/21/07

XXXXXX

J

SAP new version glitch

AMJ

FL

3/21/07

1010684

K

Update section on Setting the Date and Time. Include testing and AMJ disassembly/assembly for the Masimo SpO2 feature and updated repair parts lists.

FL

Drawings and/or illustrations and/or part numbers in this document are for reference only. For the most current revision call the Welch Allyn Customer Service phone number (see page ii).

v

Contents 1 - Introduction... 1 Warnings and cautions... 1 General warnings... 1 Blood pressure warnings... 3 SpO2 warnings... 4 Temperature warnings... 5 IR communications port warnings... 5 General cautions... 5 Blood pressure cautions... 6 SpO2 cautions... 6 Temperature cautions... 6 Electrostatic discharge (ESD)... 7 Symbols... 8 Safety symbols... 8 Agency symbols... 8

2 - Overview... 9 Purpose and scope... 9 Other applicable documents... 9 Contents checklist... 10 Possible attachments... 10 Service... 11 Technical assistance... 11 Field replacement units... 11 Service loaners... 11 Service intervals... 12 Spot Vital Signs configurations... 12 Controls... 13 LCD (liquid crystal display)... 15 Connections... 16 Blood pressure hose and cuff connections... 17 Temperature probe connection... 17 SpO2 sensor... 17 Quick reference card... 17 DCpower connection... 18 Charging the battery... 18 Standby mode... 18

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Contents

Welch Allyn Spot Vital Signs

3 - Functional overview... 19 Power on/off and system check procedure... 19 Internal configuration mode... 20 Functional verification... 21 Temperature functional check... 22 SpO2 functional check... 24

4 - Calibration... 25 Connections... 25 Voltage calibration... 27 Blood pressure calibration... 27 Date/time set... 28

5 - Troubleshooting... 29 Error codes... 29 Causes and corrective action... 30 Battery voltage check... 33 Window display check... 33 Blood pressure calibration check... 33 Temperature functional check... 34 Masimo SpO2 functional check... 34 Nellcor SpO2 functional check... 34 Communication option check... 34 Functional testing procedures... 34 Current test... 35 Noise levels... 35 Button test... 35 Interface test... 36 Print quality... 36 Pneumatic tests... 37 Fail safe (over pressure) test... 37 Service work checklist... 38

6 - Disassembly and repair... 39 Battery disassembly... 40 Temperature disassembly... 41 Front housing and key pad disassembly... 42 LCD disassembly... 42 Power and battery cable disassembly... 43 Main printed circuit board assembly... 44 SpO2 circuit board disassembly... 45 Masimo board... 45 Nellcor board... 47 Pump and valve disassembly... 48

7 - Technical overview... 51 System description... 51 Battery /charge system... 51

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vii

Main CPU power supply... 51 Clock/calendar power... 51 Mod B NIBP power... 52 Thermometer power... 52 SpO2 power... 52 LCD power... 52 Communications... 52 Interconnect diagram... 53

8 - Field replaceable units... 55 9 - Specifications... 59 Patient population... 59 Blood pressure... 59 Temperature... 59 Pulse pximetry... 60 Masimo sensor accuracy guide... 60 Masimo patents... 60 Nellcor® sensor accuracy guide... 61 Nellcor patents... 62 Mechanical... 62 Electrical... 62 Environmental... 62 Guidance and manufacturer’s declaration... 63 Emissions and immunity information... 63 Patents... 66 Identification label and serial numbering system... 67 Firmware identification... 67

10 - Maintenance... 69 Cleaning... 69 Spot Vital Signs... 69 Blood pressure cuff... 69 Cables and pressure hose... 69 Temperature probe... 70 SpO2 sensor... 70 Battery removal and replacement... 70 Masimo SpO2 calibration check... 71 Nellcor SpO2 functional check... 71 SpO2 accessory disposal... 71 Temperature calibration check... 71

A - Repair test specifications... 73 General unit test... 73 A-D noise test... 73 Leak test... 73 Inflation test... 73 Dump test... 73

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Contents

Welch Allyn Spot Vital Signs

Pneumatic calibration... 74 Pneumatic accuracy test... 74 Valve control test... 74 Voltage calibration... 74 Blank mode current test... 74 Back light (Idle) current test... 75 Valve/pump mode current test... 75 Interface test... 75 Temperature option requirements... 75 Accuracy test... 75 Temperature probe test... 75 SpO2 option requirements... 75 SpO2 functional test... 75 SpO2 mode current test... 75 Fail safe test... 76 Over pressure test... 76 Over 15 mmHg... 76

B - Supplies and Accessories... 77 Latex-free blood pressure... 77 Pulse oximetry accessories and supplies... 78 Masimo... 78 Nellcor... 79 Temperature... 80 Mounting... 80 Extended warranty... 80 Miscellaneous... 81

C - Miscellaneous Mounting Accessories... 83 Wall mount kit (REF 4200-62)... 83 Mobile stand kit (REF 4200-60)... 84 IV pole mount accessory (REF 4200-64)... 85 Anti-theft kit (REF 4200-70)... 86 Transformer mounting plate accessory (REF 4200-75)... 87 IR dongle mounting accessory (REF 4200-170)... 88

Warranty... 89 Spot Vital Signs... 89 Accessories... 89

1

1 Introduction Welch Allyn has updated the Spot Vital Signs from its original configuration; offering a Pressure Preset option (Version 2, page 14) instead of a Print option (Version 1, page 13). In addition, some Version 2 configurations offer Masimo SpO2 technology. Table 1. Version comparison Function/Appearance

Version 1 (serial number less than 200705000)

Version 2 (serial number 200705000 and above)

Available option

Print

Pressure Preset

Available SpO2 capability

Nellcor

Masimo or Nellcor

Bezel and switch array color

Black bezel/multi-colored switch array

Blue

Warnings and cautions Familiarize all operating personnel with the general safety information in this summary. Specific warnings and cautions are also found throughout this manual. Such specific warnings and cautions may not appear here in this summary.

General warnings A warning statement in this manual identifies a condition or practice, which if not corrected or discontinued immediately, could lead to patient injury, illness, or death. WARNING The Welch Allyn Spot Vital Signs is designed for use by medical clinicians. Although this manual may illustrate medical spot check techniques, only a trained clinician who knows how to take and interpret a patient’s vital signs should use this system. WARNING The information in this manual is a comprehensive guide to the operation of the Welch Allyn Spot Vital Signs. To achieve satisfactory results, you should read the manual thoroughly before attempting to use the device. WARNING Spot Vital Signs is not intended to take measurements on neonatal patients. The AAMI SP10:1992 standard defines neonates as children 28 days or less of age if born at term (37 weeks gestation or more); otherwise up to 44 gestational weeks. WARNING The Welch Allyn Spot Vital Signs is not defibrillator proof.

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Introduction

Welch Allyn Spot Vital Signs

WARNING The Welch Allyn Spot Vital Signs is not intended for continuous monitoring. Do not leave the device unattended while taking measurements on a patient. WARNING To ensure patient safety, use only accessories and supplies (i.e., blood pressure cuffs, hoses, temperature probes, SpO2 sensors, etc.) recommended for or supplied with Spot Vital Signs. Using unapproved accessories with Spot Vital Signs can affect patient and/or operator safety. WARNING This device is not suitable for use in the presence of a flammable anesthetic mixture with air or oxygen or nitrous oxide. An explosion may result. WARNING Avoid compression of the blood pressure cuff tubing or pressure hose of the Welch Allyn Spot Vital Signs. Compression of the cuff tubing or pressure hose may cause system errors to occur in the device. WARNING Care should be taken to prevent water or other fluid from entering any connectors on the device. Should this occur, the connectors should be dried with warm air. All operating functions should then be checked for proper operation. WARNING Any Spot Vital Signs which has been dropped or damaged should be checked by qualified service personnel to ensure proper operation prior to use. Do not use the Welch Allyn Spot Vital Signs if you notice any signs of damage. Contact the Welch Allyn Customer Service Department for assistance. WARNING Every three months, inspect the temperature probe, SpO2 cord, and accessories for fraying or other damage. Replace as necessary. WARNING There are no user-serviceable parts inside the device other than battery replacement. Refer Spot Vital Signs to the Authorized Service Center. WARNING The Spot Vital Signs should not be used on patients who are linked to heart/lung machines. WARNING The Spot Vital Signs does not operate effectively on patients who are experiencing convulsions or tremors. WARNING This device complies with current required standards for electromagnetic interference and should not present problems to other equipment or be affected by other devices. As a precaution, avoid using this device in close proximity to other equipment. WARNING This device is not intended for hand-held use during operation. WARNING Welch Allyn recommends leaving the battery in the device, regardless if the device is not used for long periods of time, since there is no hazard of leaving the battery in the device. WARNING Do not autoclave. WARNING Welch Allyn is not responsible for the integrity of any mounting installation. Welch Allyn recommends that the customer contact their Biomedical Engineering Department or maintenance service to ensure professional installation for safety and reliability of any mounting accessory.

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Introduction

3

Blood pressure warnings WARNING To ensure pediatric blood pressure accuracy and safety, the Welch Allyn Child Print Cuff (5200-03), the Welch Allyn Small Child Durable One-Piece Cuff (5082-203-3), and the Welch Allyn Small Child Disposable One-Piece Cuff (5082-93-3) are the smallest cuffs allowed for use with young children and infants. The circumference of the child’s arm must fit within the range markings on the cuff. WARNING You may experience inaccurate blood pressure measurements if blood pressure cuffs and/or hoses other than those provided by Welch Allyn for the Spot Vital Signs are used. WARNING Patients who are experiencing moderate to severe arrhythmias may give inaccurate blood pressure measurements. WARNING When several blood pressure measurements are taken on the same patient, it is recommended that the blood pressure cuff site and extremity are checked regularly for possible ischemia, purpura, and/or neuropathy. WARNING Do not change the connector(s) on the blood pressure cuff tubing of this device to luer type. Luer type connectors are commonly used in intravenous infusion systems. Using the luer connectors on blood pressure cuff tubing creates the risk that the blood pressure tubing could be mistakenly connected to a patient's intravenous line, resulting in the introduction of air into the patient's circulatory system.

4

Introduction

Welch Allyn Spot Vital Signs

SpO2 warnings WARNING Only use Spot Vital Signs with Masimo or Nellcor SpO2 option with Masimo or Nellcor brand sensors and accessories, respectively. Using the wrong or unapproved sensors or cables may cause improper performance. WARNING The SpO2 sensors and extension cables are intended for use only for pulse oximetry measurements. Do not attempt to connect these cables to a PC or any similar device. WARNING Before use, carefully read the sensor’s directions for use, including all warnings, cautions, and instructions. WARNING Do not use a damaged sensor or SpO2 cable. Do not use a sensor with exposed optical components. WARNING Tissue damage can be caused by incorrect application or duration of use of an SpO2 sensor. Inspect the sensor site as directed in the sensor’s Directions for Use. WARNING Do not use the sensors during magnetic resonance imaging (MRI) scanning. Induced current could potentially cause burns. The pulse oximeter may affect the MRI image, and the MRI unit may affect the accuracy of the pulse oximetry measurements. WARNING Certain ambient environmental conditions, sensor application errors, and certain patient conditions may affect SpO2 readings and pulse signal. WARNING Do not immerse the sensor or patient cables in water, solvents, or cleaning solutions (the sensors and connections are not waterproof). Do not use irradiation, steam, or ethylene oxide for sterilization. WARNING Do not use the SpO2 cable or power cord to lift the unit because the cable or cord could disconnect from the unit, causing the unit to drop on the patient. WARNING The SpO2 in the Welch Allyn Spot Vital signs is not intended for use as an apnea monitor. WARNING Consider the SpO2 an early warning device. As a trend toward patient deoxygenation is indicated, use laboratory instruments to analyze blood samples to completely understand the patient’s condition.

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Introduction

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Temperature warnings WARNING Single-use, disposable probe covers, available from Welch Allyn, limit patient cross-contamination. The use of any other probe cover or the failure to use a probe cover may produce temperature errors and is specifically not recommended. WARNING Use only oral probes (blue cap) for taking oral and axillary temperatures. Use only rectal probes (red cap) for taking rectal temperatures. The use of the wrong probe may produce temperature errors. WARNING Do not allow the tip of the temperature probe to come into contact with any heat source (e.g., hands or fingers) prior to taking a temperature measurement. If this occurs, discard the probe cover and start the temperature determination again. WARNING Long-term continuous monitoring beyond three to five minutes is not recommended in any mode.

IR communications port warnings WARNING The Welch Allyn Spot Vital Signs contains an infrared communications port for isolated communications with external devices. The port is located on the side of the device to preclude direct eye contact on a continual basis when viewing the display. As a precaution, do not look directly into the infrared port during operation.

General cautions A caution statement in this manual identifies a condition or practice, which if not corrected or discontinued immediately, could lead to equipment failure, equipment damage, or data loss. Caution If the accuracy of any measurement is in question, check the patient's vital sign(s) by an alternate method, then check to make sure the device is functioning properly. Caution Ensure the device is placed on a secure surface or use one of the optional mounting accessories. Caution Do not place fluids on the device.

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Introduction

Welch Allyn Spot Vital Signs

Blood pressure cautions Caution Extremity and blood pressure cuff motion should be minimized during blood pressure determinations. Caution If the blood pressure cuff is not at heart level, the difference in reading due to the hydrostatic effect should be noted. The value of 1.80 mmHg must be added to the displayed reading for every inch (2.5 cm) above heart level. The value of 1.80 mmHg must be subtracted from the displayed reading for every inch (2.5 cm) below heart level. Caution Proper blood pressure cuff size and placement is essential to the accuracy of the blood pressure determination. Caution When measuring blood pressure on children younger than 3 years of age, it is recommended that the Pressure Preset (initial inflation pressure) be set at 160 mmHg or lower.

SpO2 cautions Caution The pulse oximeter is calibrated to determine the percentage of arterial oxygen saturation of functional hemoglobin. Significant levels of dysfunctional hemoglobin such as carboxyhemoglobin or methemoglobin may affect the accuracy of the measurement. Caution Physiological conditions, medical procedures, or external agents that may interfere with the pulse oximeter’s ability to detect and display measurements include dysfunctional hemoglobin, arterial dyes, low perfusion, dark pigment, and externally applied coloring agents such as nail polish, dye, or pigmented cream. Caution Some sensors may not be appropriate for a particular patient. If at least 15 seconds of perfusion pulses cannot be observed for a given sensor, change sensor location or sensor type for perfusion to resume. Caution When selecting a sensor, consider the patient’s weight and activity level, the adequacy of perfusion, the available sensor sites, the need for sterility, and the anticipated duration of monitoring.

Temperature cautions Caution The Welch Allyn Spot Vital Signs is FDA cleared to measure the axillary temperature in Normal Mode for children under the age of 4. Normal Mode axillary temperatures may not be accurate on older children or adults. THE WELCH ALLYN SPOT VITAL SIGNS IS NOT INTENDED TO BE USED ON NEONATAL PATIENTS.

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Electrostatic discharge (ESD)

Electrostatic discharge is a sudden current flowing from a charged object to another object or to ground. Electrostatic charges can accomulate on common items such as foam drinking cups, cellophane tape, synthetic clothing, untreated foam packaging material, and untreated plastic bags and work folders, to name only a few. Electronic components and assemblies, if not properly protected against ESD, can be permanently damaged or destroyed when near or in contact with electrostatically charged objects. When you handle components or assemblies that are not in protective bags and you are not sure whether they are static-sensitive, assume that they are static-sensitive and handle them accordingly. •

Perform all service procedures in a static-protected environment. Always use techniques and equipment designed to protect personnel and equipment from electrostatic discharge.

•

Remove static-sensitive components and assemblies from their static-shielding bags only at static-safe workstations - a properly grounded table and grounded floor mat and only when you are wearing a grounded wrist strap (with a resistor of at least 1 megohm in series) or other grounding device.

•

Use only grounded tools when inserting, adjusting, or removing static-sensitive components and assemblies.

•

Remove or insert static-sensitive components and assemblies only with monitor power turned off.

•

Insert and seal static-sensitive components and assemblies into their original staticshielding bags before removing them from static-protected areas.

Always test your ground strap, bench mat, conductive work surface, and ground cord before removing components and assemblies from their protective bags and before beginning any disassembly or assembly procedures.

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Introduction

Welch Allyn Spot Vital Signs

Symbols The following symbols are associated with the Spot Vital Signs.

Safety symbols Agency symbols s

Identifies information within the manual to avoid injury or equipment failure.

Caution: consult accompanying documents

Type BF Equipment

Pb

Internally Powered, Lead Acid Battery

Handle with Care

Transport Temperature

Storage Humidity

Recycle

Class II Equipment

IPXØ

Equipment is not protected against the ingress of liquid.

Do not dispose of this product as unsorted municipal waste. Prepare this product for reuse or separate collection as specified by Directive 2002/96/EC of the European Parliament and the Council of the European Union on Waste Electronic and Electrical Equipment (WEEE). If this product is contaminated, this directive does not apply. For more specific disposal information, see www.welchallyn.com/weee, or contact Welch Allyn Customer Service at +44 207 365 6780. Mode of Operation: Continuous

CERTIFIED TO: CAN/CSA STD C22.2 NO. 601.1 C

US

166292

CONFORMS TO: UL STD 60601-1 IEC 60601-1 The CE mark on this product indicates that it has been tested to and conforms with the provisions noted within the 93/42/EEC Medical Device Directive.

0297 EC

REP

European Regulatory Manager Welch Allyn Ltd. Navan Business Park • Dublin Road • Navan, County Meath, Republic of Ireland Tel.: +353 46 90 67700 • Fax: +353 46 90 67756

9

2 Overview Purpose and scope The Spot Vital Signs Service Manual is intended as a reference for maintenance and repair to the field replaceable unit (FRU) level and are listed on page 55. This manual provides the technical qualified service person with troubleshooting information, repair procedures, and calibration and performance verification instructions. A technical overview of the Spot subsystems is provided as an introduction to the device’s circuitry and pneumatics. This manual is intended for the technical qualified service person. Service training classes on Welch Allyn’s products are available. Contact Welch Allyn Technical Service for information.

Other applicable documents The Spot Vital Signs Directions for Use manual is also available. Refer to this document for information other than maintenance and repair. Welch Allyn 9600 Plus Calibration Tester Directions for Use - for all models. Masimo Directions for Use - for models 42M0B and 42MTB Nellcor Directions for Use - for models 42N0B and 42NTB

10

Overview

Welch Allyn Spot Vital Signs

Contents checklist Unpack the Welch Allyn Spot Vital Signs and applicable accessories, identify each item with the following checklist and inspect for missing items. Retain the shipping materials in the event of shipping damage or for return, if necessary, to Welch Allyn for repair or warranty service. All Spot Vital Signs include the following components: Spot Vital Signs Device. This device automatically measures and displays blood pressure and pulse rate. Options include thermometry and pulse oximetry. Directions for Use Manual. Read this manual thoroughly before using Spot Vital Signs. Save this manual for reference. Warranty Card. This card validates the Spot Vital Signs warranty. Fill out the warranty card and mail it today. Blood Pressure Cuff. Latex free blood pressure cuff with connectors. Other size cuffs are available separately. Blood Pressure Hose. Latex-free pressure hose with connectors to attach various sizes of blood pressure cuffs to the Spot Vital Signs. AC Power Transformer and Cord Assembly. Provides power to the Spot Vital Signs and charges the internal battery. Quick Reference/Error Code Card. Attach this quick operating and error code guide to the device handle, mobile stand, or wall mount.

Possible attachments Spot Vital Signs may include the following items based on the model and accessories purchased: SureTemp Temperature Probe and Covers. One oral temperature probe (blue cap) and one box of 25 single-use, disposable probe covers. Pulse Oximetry (SpO2). The finger clip SpO2 sensor and extension cable are for use with adult and pediatric patients. Other sensors are available separately.

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11

Service Caution Unauthorized repairs will void the warranty.

A Welch Allyn Service Center must perform all repairs on products under warranty. Unauthorized repairs will void the warranty. Qualified electronics personnel or a Welch Allyn Service Center should repair products out of warranty.

Technical assistance If you have an equipment problem that you cannot resolve, call the Welch Allyn Service Center nearest you for assistance. Technical service telephone support is available on normal business days. If you are advised to return a product to Welch Allyn for repair or routine maintenance, schedule the repair with the service center nearest you. Before returning a product for repair, you must obtain authorization from Welch Allyn. Service personnel will give you a Service Notification number. Returns without a Service Notification number will not be accepted for delivery. If you need to return the Spot Vital Signs for service: •

Remove all hoses, cables, sensors, power cords, and any ancillary products not associated with the problem.

•

Whenever possible, use the original shipping carton and packing materials.

•

Include a packing list and the Welch Allyn Service Notification number.

•

Note the Service Notification number on the outside of your shipping container.

It is recommended to insure all returned goods. The sender may initiate any claims for loss or damage to the product.

Field replacement units Included with the Service Manual is a complete list of field replacement units. Order spare parts from your local Welch Allyn Service Center.

Service loaners Service loaners are provided, on request, if a Welch Allyn Service Center provides repair service. Loaners for products repaired while under the original warranty, or while under service contract, are provided free of charge and are shipped within 48 hours of notification of need. For service repairs outside of warranty or contract, loaners are available for a nominal charge and shipment is subject to availability. Loaners are shipped pre-paid; however, this charge is added to the service charges.

12

Overview

Welch Allyn Spot Vital Signs

Service intervals Verify Spot Vital Signs annually for blood pressure calibration, temperature, and SpO2 accuracy.

Spot Vital Signs configurations Table 2. Available Versions of Spot Vital Signs REF

Description

4200B

Spot Vital Signs with blood pressure only

420TB

Spot Vital Signs with blood pressure and SureTemp thermometer

42MOB

Spot Vital Signs with blood pressure and Masimo SpO2*

42NOB

Spot Vital Signs with blood pressure and Nellcor SpO2

42MTB

Spot Vital Signs with blood pressure, SureTemp thermometer, and Masimo SpO2 *

42NTB

Spot Vital Signs with blood pressure, SureTemp thermometer, and Nellcor SpO2

* Version 2 configurations only.

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Overview

13

Controls Figure 1. Spot Vital Signs with SureTemp Plus Thermometer (Version 1) Thermometer Eject Button: push to remove used temperature probe cover.

Next Patient/Clear/Cancel Button: • active display: clears the display. • in Standby Mode: recalls the last patient information. Pressing a second time clears the screen. • cancels an active blood pressure measurement and deflates the cuff.

SYS kPa (mmHg)

DIA kPa (mmHg)

SpO2 %

Printer: press to print the measurements (Version 1 only).

/ min

Blood Pressure Start/Stop Button: initiates a new blood pressure cycle. Pressing again cancels an active blood pressure measurement and deflates the cuff.

M P

C Mode Button: • holding for 2 seconds while the display is active turns off/on the backlight. • in Standby Mode, recalls the last patient information. • with the temperature probe removed from the probe holder, switches the temperature from Oral to Axillary Mode.

MODE

Pressure Hose Connector: port for blood pressure hose.

Power Button: controls power to the device.

14

Overview

Welch Allyn Spot Vital Signs

Figure 2. Spot Vital Signs with SureTemp Plus Thermometer (Version 2)

Thermometer Eject Button: push to remove used temperature probe cover.

SYS kPa (mmHg)

DIA kPa (mmHg)

SpO2 %

Next Patient/Clear/Cancel Button: • active display: clears the display. • in Standby Mode: recalls the last patient information. Pressing a second time clears the screen. • cancels an active blood pressure measurement and deflates the cuff.

/ min

Pressure Preset Button: press to change the factory inflation default for one reading (Version 2 only).

Mode Button: • holding for 2 seconds while the display is active turns off/on the backlight. • in Standby Mode, recalls the last patient information. • with the temperature probe removed from the probe holder, switches the temperature from Oral to Axillary Mode.

Blood Pressure Start/Stop Button: initiates a new blood pressure cycle. Pressing again cancels an active blood pressure measurement and deflates the cuff.

Spot Vital Signs

Pressure Hose Connector: port for blood pressure hose.

Power Button: controls power to the device.