Newport HT50, HT50-H, HT50-H1, HT50-H1-B Service Manual

Newport Medical Instruments, Inc.

NEWPORT HT50 VENTILATOR

Service Manual

SERHT50NA Rev. A

September 2008

(P/N HT50-H, HT50-H1, HT50-H1-B)

Exclusively distributed by:
NEWPORT MEDICAL INSTRUMENTS, INC.
1620 Sunflower Avenue
Costa Mesa, CA 92626 USA
Tel: [phone] Ext. 500
Tel: [phone] (USA only)
Fax: [phone]
Customer Service ext. 282

www.Ventilators.com
email: [e-mail]

MANUAL REVISION HISTORY

HT50 Service Manual SERHT50NA
DATE REVISION PAGES EFFECTED

August 2008 A New release for dual

nal battery update

inter

SERHT50NA A0808

TABLE OF CONTENTS

Section 1 . . . . . . . . . . OPERATOR’S RESPONSIBILITY

• Operator’s Responsibility for Patient Safety

• Limitation of Liability

• Warranty

• Definitions

• Typing Conventions

• Warnings and Cautions

• Factory Maintenance or Repair

• Contact Information

Section 2 . . . . . . . . . . SPECIFICATIONS

Intended Use

•

• Symbols / Labeling Table

• Controls / Alarms / Monitors

• Hardware Requirements

• Miscellaneous Specifications

• Humidifier Specifications

• Air / Oxygen Entrainment Mixer Specifications

• Oxygen Blending Bag Kit Specifications

Section 3 . . . . . . . . . . DESCRIPTION OF CONTR

ALARMS & CONNECTORS

• Front Panel Overview

• Front Panel Controls & Indicators

• Front Panel Alarms

• Front Panel Message Display Window

• Left Side Connectors

• Right Side Connectors

• Optional Accessories

• User Set Up

Section 4 . . . . . . . . . . THEORY OF OPERATION

• General System Ov

• A/CMV Mode (Assist/Control Mandatory Ventilation)

• SIMV Mode (Synchronized Intermittent Mandatory
Ventilation)

• SPONT Mode (Spontaneous Ventilation)

• P support (Pressure Support)

• Pressure Control Ventilation

• Volume Control Ventilation

• Back-Up Ventilation

erview

OLS, INDICATORS,

SERHT50NA A0808

Section 5 . . . . . . . . . . CALIBRATION AND OPERATION VERIFICATION

• Introduction

• Test Equipment Required

• Pre-Test Inspection

• Front Panel Test / Alarm Check

• System Leak Test

• Pressure Transducer Calibration

• Pressure Meter Calibration

• Volume Factor Calibration

• Pressure Relief Valve Calibration

• Exhalation Valve Calibration

• Operational Set-Up (Standard Test Settings)

• Pressure Verification

• P trig

• PEEP / CPAP

• Pressure Control

• Exhalation Valve Sealing

• Manual Inflation

• High Paw Alarm

• Low Paw Alarm

• Check Prox Line Alarm

• Battery Test

• Humidifier (for HT50-H)

• OVP Test Record

Section 6 . . . . . . . . . . MAINTENANCE PR

• Introduction

• Tools Required

• Parts Required

• Routine Maintenance Procedure

• Annual Maintenance Procedure

• 10,000 Hour Maintenance Procedure

Section 7 . . . . . . . . . . TR

OUBLESHOOTING

• Introduction

• Mechanical and Pneumatic Troubleshooting

• Electronic Troubleshooting

OCEDURES

SERHT50NA A0808

Section 8. . . . . . . . . . ELECTRONIC & PNEUMATIC COMPONENT REMOVAL &

REPLACEMENT PROCEDURES

• Introduction

• Tools Required

• Discharge the HT50 Power Supply

• Disassembly (Lower Case)

• Internal Battery Assembly Replacement

• Pump Assembly Replacement

• Outlet Assembly Replacement

• Humidifier Heater Assembly Replacement

• Front Panel Board Replacement

• Front Panel Bezel Replacement

• Main Board Assembly Replacement

• Power Supply Board Replacement

Section 9 . . . . . . . . . . DIAGRAMS AND PARTS LISTS

• Figure 9-1, Internal View
Figure 9-2, Final Assembly, Front View HT50-H

•

• Figure 9-3, Final Assembly, Front View HT50-H1

• Figure 9-4, Main Board with Mounting Hardware

• Figure 9-5, Main Board Tubing Connection, Left Side

• Figure 9-6, Right Side Case

• Figure 9-7, Front Panel, Side View

• Figure 9-8, Pneumatic Schematic

• Drawing Parts Reference List

Section 10 . . . . . . . . . REPACKAGING AND SHIPPING INSTRUCTIONS

Appendix A . . . . . . . . HT50 PARTS AND ACCESSORIES

SERHT50NA A0808

• Introduction
RGA (Return Goods Authorization)

•

• Packaging: Complete Unit

• Packaging: Parts or Accessories

• HT50

Ventilator Parts and Accessories

• Service Parts List

1. OPERATOR’S RESPONSIBILITY

Operator’s Responsibility for Patient Safety . . . . . 1-1

Limitation of Liability. . . . . . . . . . . . . . . . . . . . . . . . 1-2

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Typing Conventions . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . 1-4

Factory Maintenance or Repair . . . . . . . . . . . . . . 1-7

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . 1-8

SERHT50NA A0808

OPERATOR’S RESPONSIBILITY FOR PATIENT SAFETY

The Operation manual (p/n OPRHT50-NA) contains information
intended to ensure safe and effective ventilator use. The label on
the inside of the front panel cover door is meant to complement not
replace the Operation manual.

The design of the HT50 ventilator, the Operating and Service
manuals, and the labeling on the ventilator take into consideration
that the purchase and use of the equipment is restricted to trained
professionals, and that certain inherent characteristics of the
ventilator are known to the operator. Instructions, warnings and
caution statements are therefore limited to the specifics of the
Newport HT50.

Caution Federal law restricts this device to sale by or on the
order of a physician.

SECTION 1

This man

ual excludes references to various hazards which are
obvious to medical professionals and operators of this equipment,
to the consequences of product misuse, and to potentially adverse
effects in patients with abnormal conditions.

When the HT50 is used in home care and sub acute environments it
is important that the primary caregiver has received training and has
demonstrated competency in all equipment functions. A specific
written care plan must be established by the attending physician.

Transport of patients with the HT50 requires that medical staff have
a good working knowledge of the ventilator’s use and problem
resolution. Proper emergency back-up equipment must be
immediately available during transport.

HT50 operators must recognize their responsibility for implementing
safety monitoring mechanisms which supply appropriate
information on equipment performance and patient condition.
Patient safety may be achieved through a wide variety of means
such as electronic surveillance of equipment performance and
patient condition. However, equipment surveillance should not
replace direct observation of clinical signs. The HT50 operator is
solely responsible for selecting the appropriate level and method of
patient monitoring.

SERHT50NA A0808 1-1

Product modification or misuse can be dangerous. Newport Medical
Instruments, Inc. (N

EWPORT) disclaims all liability for the

consequences of product alterations or modifications, as well as for
the consequences which might result from the combination of this
ventilator with other products, whether supplied by Newport or by
other manufacturers, unless such a combination has been
specifically endorsed by Newport.

OPERATOR’S RESPONSIBILITY

LIMITATION OF LIABILITY

The liability of Newport Medical Instruments, Inc. (NEWPORT) is
subject to and limited to the exclusive terms and conditions as set
forth herein. Said liability is limited whether arising out of, or related
to, the manufacture and sale of goods, their installation,
demonstration, sales representation, use, performance, or
otherwise. Any liability based upon product warranty, whether
breach of warranty or otherwise, is limited regardless of any fault
attributable to N
breach of warranty, negligence, and strict liability).

The expressed warranties are in lieu of all other warranties,
expressed or implied, including, without limitation, warranties of
merchantability, fitness for any purpose, or noninfringement.

EWPORT shall not be liable for any special incidental or

N
consequential damages incurred by the buyer to a third party. The
buyer shall not be entitled to make liability recoveries from N
due to such situations.

EWPORT and the nature of the action (including

EWPORT

WARRANTY

The Newport HT50 Ventilator is guaranteed to be free of defects for
a period of two (2) years from date of delivery. The following are
exceptions to this warranty:

1. Defects caused by misuse, mishandling, tampering, or by
modifications not authorized by Newport Medical Instruments,
Inc. (N

EWPORT) or its representatives.

2. Rubber and plastic components and materials are guaranteed
to be free of defects at time of delivery.

3. The internal batteries are warranted for six months.

Any product which proves to be defective in workmanship or
material will be replaced, credited, or repaired. Newport retains the
discretion to select the most suitable of these options. Newport is
not responsible for deterioration, wear, or abuse. In all cases,
Newport will not be liable beyond the original selling price.

Application of this warranty is subject to the following conditions:

1-2 SERHT50NA A0808

EWPORT or its authorized representatives must be promptly

1. N
notified upon detection of the defective material or equipment.

2. Defective material or equipment must be returned to N
or its authorized representative.

EWPORT

SECTION 1

DEFINITIONS

3. Examination b
confirm that the defect is covered by the terms of this warranty.

To ensure complete protection under this warranty, the Warranty
Registration Card must be returned to Newport within ten (10) days
of equipment receipt.

The above is the sole warranty provided by N
warranty, expressed or implied, is intended. Representatives of
Newport are not authorized to modify the terms of this warranty.

WARNING Possibility of personal injury, to patient or others, if
disregarded.

Caution Possibility of equipment damage if disregarded.

NOTE: Additional information intended to avoid inconveniences

during operation.
followed.

y NEWPORT or its authorized representatives must

EWPORT. No other

Notes also indicate important procedures to be

TYPING CONVENTIONS

Inspection: Examination of actual condition.

Service: Measures required to maintain a specified condition.

Repair: Measures required to restore a specified condition.

Maintenance: Required inspection, service, and repair of the

device.

Preventive Maintenance: Maintenance performed at regular

vals to keep the device in good working condition.

inter

Within the text of this manual, controls, alarms, and indicators are
designated by the labeling name as they appear on the ventilator,
e.g.: Psupport (pressure support), Ptrig (pressure trigger), and
SPONT (spontaneous mode).

Please review all WARNINGS and Cautions outlined in this

ual prior to servicing the HT50 for the first time.

man

SERHT50NA A0808 1-3

OPERATOR’S RESPONSIBILITY

WARNINGS AND CAUTIONS

At all times, strictly follow this Manual.The safe use of the HT50
Ventilator requires a full understanding of its operation and
adherence to the manual’s instructions.The equipment is only to be
used for the purpose specified under “Intended Use” (see Section

2). Observe all of the WARNINGS and Cautions posted in this
man
accessories.

General Warnings

External power connection: To maintain grounding integrity when
using A.C. power, only connect to hospital grade receptacles.
Always disconnect the external power supply prior to servicing.
Always use the power cord supplied with the HT50. Make certain
the power cord ferrite is always attached to the A.C. power cord to
ensure that the HT50 meets EMC requirements.

There is a risk of explosion if used in the presence of flammable
anesthetics.

ual and on labels found on the HT50 Ventilator and associated

All settings and adjustments in the different ventilation modes must
be made in accordance with a physician’s prescribed therapy.

EWPORT cannot warrant or endorse the safe performance of third

N
party humidifiers for use with the HT50.

When the HT50 is operating on battery power, the optional built-in
humidifier does not function. A heat moisture exchanger, or other
humidification device, should be used until the unit is connected to
A.C. power at which time the built-in humidifier can be used.

Do not use electrically conductive patient circuits.

Always use a clean patient circuit.

Always use an inline filter (p/n HT6004701 or equivalent) at the
Airway Pressure Connector to protect the internal transducers from
moisture or other contaminants.

Always use appropriate monitors to ensure sufficient oxygenation
and ventilation (such as pulse oximeter and/or capnograph) when
the HT50 Ventilator is in use on a patient.

The ventilator is ready for operation only when:
a) It is completely assembled, and;
b) The Quick Check Procedure, including the Exhalation Valve

Calibration (see Appendix A, Operating Manual) or OVP
(Service Manual) has been successfully completed.

1-4 SERHT50NA A0808

Constant attention by qualified medical personnel is recommended
whenever a patient is ventilated with the HT50.

SECTION 1

When the HT50 is used in homecare environments

, proper
education and training of the appointed caregiver must be provided
prior to the patient leaving the health care facility.

If a fault is detected in the ventilator and its life support functions
are in doubt, immediately discontinue use; use an alternative
method of ventilation until the fault has been corrected. Contact

EWPORT Technical Service Department immediately.

N

Failure to identify and correct alarm violations may result in patient
injury.

Continuous oxygen monitoring is required for patient safety. The
HT50 does not have a built-in alarm system to notify user of a failure
or disconnection of the oxygen source.

Ensure that the oxygen source is not empty before and during the
use of the optional Air/Oxygen Entrainment Mixer or Oxygen
Blending Bag Kit.

The primary internal battery should be replaced every 12 months or
sooner if the use time no longer meets the needs of the user.This
will depend on a number of factors including settings and usage
patterns. The secondary internal battery should be replaced every
24 months.

Please recognize that any life support equipment should have
appropriate alternate power sources and means of ventilation
readily available in case of a mechanical or system problem. If you
need alternative power sources, contact Newport Medical
Instruments Inc.

When the HT50 is used for transport applications, ensure that the
internal battery system is fully charged prior to use.

When the Battery Empty audible alarm sounds continuously, only a
limited time of internal battery power remains and an alternate
power source should be found immediately.

Frequent deep discharge of the internal battery system will
decrease the amount of time the HT50 will operate on battery
power from a full charge state.

If you use the internal battery system as your primary power
source, replace the primary battery as needed to ensure that the
battery operation time is sufficient.

SERHT50NA A0808 1-5

OPERATOR’S RESPONSIBILITY

Charge the internal battery system for a minimum of 8 hours before
powering the ventilator from the internal batteries. This will provide
approximately 80% of the battery charge. If the battery system is
completely depleted, it will take approximately 10 hours to fully
recharge.

Always ensure that the green Ext. Pow er LED lights after
connecting the HT50 to an e
take up to two minutes to light). If the LED does not light, check all
power connections and resolve any problems.

Always plug the HT50 into an external power supply source when
not in use to insure best battery performance.
The flow resistance of the air inlet filter, located on the right side of
ventilator, is likely to increase with repeated use. Ensure that the
filter is changed regularly.

The HT50 Ventilator is guaranteed to perform to specification when
the Newport HT50 breathing circuit with exhalation valve is used.
See Appendix B for circuit configurations and parts list.

xternal AC or DC power source (it can

Only N

EWPORT approved exhalation valves can be used with

the HT50.

Perform an exhalation valve calibration each time a clean
circuit/exhalation valve is installed.

The functioning of this machine may be adversely affected by the
operation of equipment, such as high frequency surgical
(diathermy) equipment, defibrillators or short-wave therapy
equipment in the vicinity.

This equipment has been tested and found to comply with the EMC
limits for the Medical Device Directive 93/42/EEC (EN55011 Class
A and EN 60601-1-2). These limits are designed to provide
reasonable protection against harmful interference in a typical
medical installation. The equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in
accordance with these instructions, may cause harmful interference
to other devices in the vicinity. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference with other devices,
which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more
of the following measures:

1-6 SERHT50NA A0808

• Reorient or relocate the receiving device

• Increase the separation between the equipment

SECTION 1

Cautions

• Connect the equipment into an outlet on a circuit diff
from that to which the devices(s) is connected

• Consult the manufacturer or field service technician for help.

Only use medical grade oxygen with the Air/Oxygen Entrainment
Mixer or Oxygen Blending Bag Kit.

Do not place liquid containers in the immediate vicinity or on top of
the HT50. Liquids that get into the ventilator can cause equipment
malfunction and damage.

After servicing an HT50, it must completely pass an Operational
Verification Procedure (see Service Manual) before being returned
to patient use.

An authorized Newport Medical Instruments factory-trained
technician must do all service or repairs performed on the HT50.

Do not open the ventilator or perform service on an open unit while
connected to external power.

erent

Use standard anti-static techniques while working inside the
ventilator or handling any electronic parts.

Clean all external parts of the ventilator prior to servicing.

Water in the oxygen supply can cause equipment malfunction and
damage.

Always replace a blown fuse with one of proper rating for
corresponding voltage range.

NOTE: Review HT50 Oper
(Section 4 of this manual) before servicing the ventilator.

NOTE: Use the tools and equipment specified in this manual to
perf

Batteries contain materials that can harm the environment. Do not
discard them in an incinerator or force them open. Batteries cannot
be disposed of with normal waste.

Factory Maintenance or Repair

ating Manual and Theory of Operation

orm specific procedures.

SERHT50NA A0808 1-7

Scheduled maintenance or repair services are available from the
Newport Technical Service Department. To send your ventilator in
for service, see HT50 Service Manual for repackaging and shipping
instructions.

OPERATOR’S RESPONSIBILITY

Current pricing for scheduled maintenance and labor rates can be
found in Newport Medical Instruments Annual Price List. To obtain a
copy, please contact your local Newport Sales Representative or
contact our Customer Service Department using information below.

Contact Information

Address: Newport Medical Instruments, Inc.

Phone numbers: Toll-free within the United States:

Fax numbers: Main fax: [phone]

1620 Sunflower Ave
Costa Mesa, California, USA 92626

800.451.3111
Worldwide: 1.714.427.5811

Technical Ser

Website: www.NewportNMI.com /

www

.ventilators.com

Email: [e-mail]
Department

extensions: Customer Service: 282

T

echnical Service: 500 (24-hour pager activated

after Technical Service department hours)
Clinical Support: 123 (24-hour pager)

Corporate Office Monday through Frida
hours: (USA Pacific Time)

Technical Service Monday through Friday, 7:00 am to 4:00 pm
hours: (USA Pacific Time)

HT50s distributed internationally have CE authorization (HT50-H, HT50­H1) and are represented by: Obelis, s.a. , 34 Ave de Tervuren, bte 44, B­1040 Brussels, Belgium. Tel: [phone] Fax:[phone]
email:[e-mail]

vice fax: [phone]

y, 8:00 am to 5:00 pm

1-8 SERHT50NA A0808

2. SPECIFICATIONS

Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Symbols / Labeling Table . . . . . . . . . . . . . . . . . . . . 2-1

Controls / Alarms / Monitors . . . . . . . . . . . . . . . . . 2-2

Hardware Requirements . . . . . . . . . . . . . . . . . . . . 2-5

Miscellaneous Specifications . . . . . . . . . . . . . . . . . 2-5

Humidifier Specifications . . . . . . . . . . . . . . . . . . . . 2-7

Air / Oxygen Entrainment Mixer Specifications . . . 2-8

Oxygen Blending Bag Kit Specification . . . . . . . . . 2-8

SERHT50NA A0808

INTENDED USE

SECTION 2

SECTION 2

This device is intended to provide continuous or intermittent mechanical
ventilator support for the care of individuals who require mechanical
ventilation. The ventilator is a restricted medical device intended for use by
qualified, trained personnel under the direction of a physician. Specifically,
the HT50 is applicable for adult and pediatric (i.e. infant, child and
adolescent) patients, greater than or equal to 10 kg or 22 lbs., who require
the following general types of ventilatory support, as prescribed by an
attending physician: positive pressure ventilation with assist/control, SIMV
and SPONT modes of ventilation. The HT50 is suitable for use in hospital,
sub-acute, emergency room, home care environments as well as for
transport and emergency response applications.

Front panel controls allow trained operators to select between a number
of operational modes, pressure support and volume or pressure control.
A comprehensive alarm system is built-in to alert the user to violations of
set safety limits. When new and fully charged, the internal battery system
provides up to 10 hours of power. With its patented, self-contained gas
supply source, the HT50 requires no external air compressor.

|

Main Power On

Main Power Standby

Equipotentiality

Refer to Operating Manual

Alarm Setting

Audible Alarm Silence/Reset

▲

High Alarm Set High Alarm

▼

Low Alarm Set Low Alarm

▲

▼

Applied Parts Type BF

SERHT50NA A0808 2-1

SPECIFICATIONS

SPECIFICATIONS

SYMBOLS/LABELING TABLE

Controls/Alarms/Monitors Range/Selection

1. MODE (Pressure or A/CMV
Volume Control) SIMV

SPONT

2. Volum e C ont rol (Tidal Volume) 100 to 2,200 mL, ATPS, ± 10%

3. Pressure Control PEEP + 5 to 60 cmH
(Target Pressure)

•

4.

V

(Flow) 6 to 100 L/min

5. t

(Inspiratory Time) 0.1 to 3.0 sec

I

6. ƒ (Frequency) 1 to 99 b/min

7. P trig (Sensitivity) –9.9 to 0 cmH

O / mbar, pressure triggering

2

(Patient Effort Indicator LED blinks once each time the airway
pressure reaches the Ptrig setting.)

8. PEEP/CPAP 0 to 30 cmH

9. P support (Pressure Support) 0 to 60 cmH

O / mbar

2

O / mbar above baseline pressure,

2

limited to PEEP + Psupport <

10. I:E Ratio 1:99 to 3:1

11. Maximum Limited Airway 100 cmH

O (98 mbar)

2

Pressure (Safety Valve)

12.

Manual Inflation 3 sec maximum

(While b

utton is pushed, the ventilator closes the exhalation

valve and delivers a operator controlled breath to the patient.)

O / mbar

2

60 cmH2O / mbar

13. Humidifier (Optional) 19ºC to 39ºC

14. Airway Pressure Meter –10 to 100 cmH

15. Alarm Silence/Reset Button Pressing button silences an audib

& Indicator seconds and resets a latched alarm indicator. LED lights to

16. ALARMS Indicators Indicators for violated alarms blink red. When the alar

17. Int. Battery Button & Indicator Pressing button displays the internal battery charge level in the

2-2 SERHT50NA A0808

O / –10 to 98 mbar

2

le alarm violation for 60

indicate that Silence is activ

e

m is no
longer violated, the indicator latches (stays lit). Cancel a latched
indicator by pressing the Silence/Reset button.

airw

ay pressure meter (Paw) window when operating on the
internal battery system for accurate reading. LED lights to
indicate internal battery system operation and alarms.

Controls/Alarms/Monitors Range/Selection

SECTION 2

18. FIO

19.

2

(with optional accessories)

On / Standby Button Press once to put in Setting condition. (On-Setting/LED off)

0.21 to 1.00

Press again to begin v

entilating (On-Ventilating/LED on).
When the HT50 is ventilating, press two times to put ventilator
into Standby/Off condition (LED off).

20. Push To Unlock Buttons & Pressing button unlocks front panel buttons if locked by
Indicator automatic panel lockfeature. Auto lock is enabled/disabled in User

Set Up

. LED lights to indicate panel is locked.

21. Alarms

▲Paw (High Pressure) 4 to 99 cmH
▼Paw (Low Pressure) 3 to 98 cmH

O / 4 to 99 mbar, must be 1< Low Paw

2

O / 3 to 98 mbar, limited by > PEEP + 3 and High

2

Paw -1
Low Baseline Pressure Paw <
High Baseline Pressure Paw >

PEEP - 3 cmH2O/mbar for 3 sec during exhalation
PEEP + 8 cmH

O/mbar at onset of a breath or 3 sec

2

after the start of exhalation
Occlusion Paw >

PEEP + 15 cmH2O/mbar at onset of a breath or 3 sec

after start of expiration
Apnea 30 sec ± 3 sec
PCV Not Reached Paw P < 50% of PCV setting

•

Insp. Min. Volume 1.1 to 50.0 L/min

▲V

I

•

Insp. Min. Volume 0.1 to 49.0 L/min

▼V

I

Check Prox Line Prox Paw does not match machine Paw during inspiration
Humidifier (5 messages) Humidifier malfunction/disconnection
Power Switchover External power to internal battery switchover alert
Battery Low Minimum of 30 minutes battery time remains until shutdown
Battery Empty Minimum of 15 minutes battery time remains until shutdown

NOTE: The time between the Battery Low Alarm violation and the Battery Empty Alarm violation
will vary depending on the v
Alarm will occur much sooner after the Battery Low Alarm, than it will at lower volumes and
pressures. In all cases, the stated minimum times for each alarm will be met, even if the two
alarms occur almost simultaneously.

Device Alert (5 messages) Ventilator malfunction: FAULT BAT SYS, OCCLUSION, 10V

Shut Down Alert On to Standby/Off Shut Down Alert

SERHT50NA A0808 2-3

entilator load. At high volumes and pressures, the Battery Empty

SHUTDOWN, SYSTEM ERROR or MOTOR FAULT

SPECIFICATIONS

22. Message Display Window

Up to 16 characters, LED alpha numeric display

yed monitored parameters:

Displa

VT(Actual delivered tidal volume)

•

V

(Inspiratory minute volume)

I

ƒ (Total breath frequency)

Paw P (Peak airway pressure)
Paw M (Mean airway pressure)
Paw B (Baseline airway pressure)
H (Hours of operation)
S (Software version)
L (or Q) (Buzzer volume (Loud or Quiet) for audible alarm)

Other displayed parameters
(In USER SET UP):

Power Save (On / Off)
Airway Pressure Units (cmH
Set Up (User / Default)
Auto Panel Lock (Enabled / Disabled)
Tech. Setup (Technical set up, refer to Service Manual)

23. Front Panel Indicators

Modes

A/CMV Green LED indicates that A/CMV mode is active.
SIMV Green LED indicates that SIMV mode is active.
SPONT Green LED indicates that SPONT mode is active.

O / mbar)

2

Contr

ols

Volume Control Green LED indicates Volume Control ventilation.
Pressure Control Green LED indicates Pressure Control ventilation.

Alarms

▲Paw (High Pressure) Red LED indicates high peak airway pressure, high baseline

pressure, or occlusion alarm violation.

▼Paw (Low Pressure) / Apnea Red LED indicates low peak airway pressure, low baseline

pressure

, apnea, or PCV (50% of PCV setting not achieved)

alarm violation.

Device Alert Red LED indicates ventilator malfunction alert.

•

▲V

(High Insp. Min. Volume) Red LED indicates high inspiratory minute volume alarm limit is

I

•

▼V

(Low Insp. Min. Volume) Red LED indicates low inspiratory minute volume alarm limit

I

(Back-Up Vent) is violated.

Misc.

Indicators

violated.

Silence / Reset Yellow LED indicates that the audible alarm is silenced for 60

seconds.
Auto Lock On Green LED indicates that the panel is currently locked.
On / Standby Green LED indicates that the HT50 is ventilating.
Ptrig Green LED blinks on to indicate patient breathing effort.

•

V

(Flow) Green LED indicates that Flow is displayed in the V•/ I:E Ratio

numeric window display.
I:E Green LED indicates that the I:E Ratio is displayed in the V

•

/ I:E
Ratio numeric window display. Blinking LED indicates a breath
with an inverse I:E Ratio.

2-4 SERHT50NA A0808

SECTION 2

Ext. P

ower / Green LED indicates external power is on and the internal

Charging Int. Battery battery is being charged. Red LED indicates power switchover

to internal battery.

Int. Battery (Push to Test) Yellow LED indicates internal battery is in use. LED blinks

yellow to indicate Battery Low alarm condition or blinks red to
indicate Battery Empty alarm condition.

Humidifier On Green LED indicates humidifier is active. LED blinks yellow to

indicate humidifier alarm condition.

Hardware Requirements

24. Electrical Applied parts type BF

25. External A.C. /D.C. (Battery 100-240 VAC, max. 2 A
Input) 50 / 60 / 400 Hz

12-30 VDC, max. 12 A

26. Dual Internal Battery Primary battery: lead acid, 12 VDC, 5 AH

Secondary back up battery: nickel metal hydride,12 VDC, 2.1 AH
When new and fully charged, the Dual Pac internal battery
supplies power for up to 10 hours of operation at these
settings: A/CMV mode, ƒ=15, Volume Control=500 mL, tI=1.0
sec, PEEP=Ø, max. airway pressure 30 cmH
Save mode ON.

O/mbar, Power

2

NOTE: The Dual Pac internal battery charges whenever the
HT50 is connected to an external power source. Battery charge
level is best maintained by keeping the HT50 continuously
connected to external power.

NOTE: The primary internal batter

y capacity diminishes with
age. As the battery ages the Battery Low alarm will occur
sooner. If this begins to infringe on the needed battery time,
prior to scheduled replacement, the primary internal battery
should be replaced.

27. RS-232C Interface /Remote 8 pin SEMCONN connector. Operates at 19,200 baud. Allows
Alarm Output put for interfacing with central alarms systems.

28. Pneumatics Gas delivery system requires no external air compressor.

Miscellaneous Description

29. Operating Temperature –18ºC to 50ºC

NOTE: For proper operation at low range temperatures (-18°C),

the HT50 must be star
environment and allowed to run for 30 minutes prior to transfer
to colder environment.

NOTE: At temperatures ove
disabled and the internal battery does not charge.

ted in a normal room temperature

r 40ºC the charging circuit is

30. Operating Humidity 15 to 95% non-condensing

31. Operating Altitude Sea level to 15,000 ft (0 to 4,572 m)

SERHT50NA A0808 2-5

There is no altitude limitation when HT50 is oper
pressurized environment.

ated in a

SPECIFICATIONS

32. Operating Pressure 600 to 1,100 mbar

33. Regulatory and Agency Complies with the following international standards & requirements:
Standards/Requirements Testing and evaluation of the NEWPORT HT50

entilator has been conducted in compliance with the following

V
voluntary standards:

IEC 60601-1:1988 (+A1:1991 +A2:1995; EN 60601-1:1990
+A1:1993 +A2:1995 +A3:1996) Medical Electr
Part 1: General Requirements for Safety
CEI/IEC 60529:2001 Degrees of Protection Provided by
Enclosures (IP Code)
MIL-STD-810E Environmental Test Methods and Engineering
Guidelines
IEC 601-2-12:1988 Particular Requirements for the Safety of
Lung

Ventilators for Medical Use

IEC 60601-1-2:2001 (+A1:2006) Medical Electrical Equipment,
Collater
Requirements and Tests

IEC 68-2-6 Test Fc Environmental Tests: Vibration (sinusoidal)
IEC 68-2-29 Test Eb Environmental Tests: Bump
IEC 68-2-32 Test Ed Environmental Tests: Free Fall
IEC 68-2-36 Test Fdb Environmental Tests: Random Vibration
ISO 8185:1997 Humidifiers for Medical Use: General

Requirements f
ASTM F 1100-90:1990 Standard Specifications for V
Intended for Critical Care Use
ASTM F 1246-91:1991 Standard Specifications for Electrically
P

owered Home Care Ventilators - Part 1: Positive-Pressure

Ventilators and Ventilator Circuits
DO-160D Environmental Conditions and Test Procedures for
Airbor

al Standard: Electromagnetic Compatibility -

or Humidification Systems

ne Equipment

ical Equipment -

entilators

34. Storage Temperature –40ºC to 65ºC

35. Storage Humidity 0 to 95% non-condensing

36. Height (includes handle) 10 inches (26 cm)

37. Width 11 inches (27 cm)

38. Depth 8 inches (20 cm)

39. Weight 16.7 lbs. (7.6 kg) without humidifier

18.0 lbs

40. Patient Range Adult - Pediatric (i.e. infant, child & adolescent) with

body w

. (8.2 kg) with humidifier

eight >

10 kg

2-6 SERHT50NA A0808

41. Factory Default Parameters

P

atient Settings:

MODE A/CMV PEEP/CPAP 0 cmH2O
Volume Control 500 mL P support 0 cmH
t

I

1.0 sec Humidifier Off

ƒ 15 b/min Buzzer Volume Loud

O ▼Paw

2

2

O

2

O

2

O ▲Paw

•

I

•

I

Ptrig –1.0 cmH
Paw Alarms 5 cmH

•

Alarms 3 L/min ▼V

V

I

40 cmH

20 L/min ▲V

User Set Up:

Power Save On
Pressure Units cmH
Auto Panel Lock Disabled
Set Up User

SECTION 2

O

2

42. Patient Circuit Reusable 22 mm I.D. adult/pediatric circuit with 3/16 inch

(4.8

mm) I.D. proximal pressure sensing line, 1/8 inch (3.2 mm)

I.D. exhalation valve control drive line, and exhalation valve.

43. Exhalation Valve N

EWPORT'S HT50 exhalation valve (P/N HT600039) is

manufactured and designed specifically for the N
Ventilator. N

EWPORT MEDICAL does not approve of the use of any

EWPORT HT50

type or brand of exhalation valve that has not been tested and
approved by N

EWPORT MEDICAL for use with the HT50.

HT50-H, HT50-HB Humidifier Specifications

(operates on A.C. power only)

Set Target T

Operating Water V

Usable Volume of

ater Bottle: 265 mL

W

Compliance at Minimum

ater Level (Refill Line): 0.5 mL/cmH

W

emperature Range: 19ºC to 39ºC

olume: 300 mL

O / mbar @ 23ºC

2

Compliance at Maximum
Water Level (Full Line): 0.33 mL/cmH

Intended Use: Adult and pediatric patients whose supraglottic airway is or is

SERHT50NA A0808 2-7

not b

ypassed.

O / mbar @ 23ºC

2

SPECIFICATIONS

Warm-Up Time: 30 minutes

Gas Leakage: 2 mL/min at airway pressure of 80 cmH

O / mbar

2

Humidifier Output: 33.8 mg/L at a continuous flow of 10 L/min @ 39ºC

Maximum Operating

y Pressure: 100 cmH

Airwa

O / 98 mbar

2

Maximum Temperature at

atient Wye That

the P
Triggers an Alarm: 41ºC

(optional) Air / Oxyg

en Entrainment Mixer Specifications

Pneumatic Requirements:

Oxygen 35 to 90 psig (2.4 to 6.2 Bar) full operating range

™

40 to 70 psig (2.7 to 4.8 Bar) accuracy

} .08

Air Atmospheric pressure

Control: adjusted continuously from 0.21 to 1.00

F

IO2

WARNING Continuous oxygen monitoring is required for patient

safety. The HT50 does not have a built-in alarm system to notify user
of a failure or disconnect of the oxygen source.

(optional) Oxygen Blending Bag Kit Specifications

Pneumatic Requirements:

Oxygen 0-10 L/min (calibrated)
Air Atmospheric pressure

Control: FIO2, indirectly adjusted from 0.21 up to 1.00

F

IO2

WARNING Continuous oxygen monitoring is required for patient

saf
of a failure or disconnect of the oxygen source.

via oxygen flow (L/min)

ety. The HT50 does not have a built-in alarm system to notify user

2-8 SERHT50NA A0808

3. DESCRIPTION OF CONTROLS,

INDICATORS, ALARMS & CONNECTORS

Front Panel Overview. . . . . . . . . . . . . . . . . . . . . . . 3-1

Front Panel Controls and Indicators . . . . . . . . . . . 3-5

Front Panel Alarms. . . . . . . . . . . . . . . . . . . . . . . . 3-14

Front Panel Message Display Window . . . . . . . . 3-23

Left Side Connectors . . . . . . . . . . . . . . . . . . . . . . 3-24

Right Side Connectors . . . . . . . . . . . . . . . . . . . . . 3-25

Optional Accessories . . . . . . . . . . . . . . . . . . . . . . 3-26

User Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

SERHT50NA A0808

FRONT PANEL OVERVIEW

Turning the HT50 On and Off

SECTION 3

The following is an overview of the HT50 front panel button
functions. For an indepth description, please review FRONT
PANEL CONTROLS AND INDICATORS.

The On/Standby button toggles between the following conditions:

Changing the MODE Control

Setting Condition Press the A/CMV, SIMV or SPONT button.The LED on the

On Condition Press the A/CMV, SIMV or SPONT button.The LED on the

Standby

Press On/Standby button once to go from Standby to Setting.
Press again to tur

Standby: HT50 dormant.
Setting: Enables setting of control parameters and exhalation

valv

On: Enables ventilation

NOTE: There is approximately a two second delay in going from

Standby to Setting condition. During this time, the HT50 performs a
self test and will light all displa

The MODE control buttons ( A/CMV / SIMV / SPONT ) function
differently in Setting and On conditions.

selected Mode will light g

selected Mode will b
will read “PRESS AGAIN.” Press the button again within 5
seconds to confirm the mode change, or the previously selected
mode will continue.

g Setting g On gg

n On. Press twice to go from On to Standby.

e calibration.

ys on the front panel.

reen to confirm the selection.

link green and the Message Display Window

Standby

Changing between Pressure Control and Volume Control

On Condition: A/CMV or SIMV Select—Adjust (▲Up / ▼Down)—Accept

SERHT50NA A0808 3-1

The Pressure Control and Volume Control buttons function
differently when in A/CMV or SIMV in On condition compared to
when in SPONT mode in On condition or Settings condition.

Select the Pressure Control or Volume Control button. Both the
LED indicator and the target value will blink.

Adjust the blinking target value for the selected control with the
▲Up / ▼Down buttons.

To Accept the new control and target v
desired control button (Volume or Pressure) a second time.

alue you must press the

DESCRIPTION OF CONTROLS, INDICATORS, ALARMS & CONNECTIONS

On Condition: SPONT
or
Setting Condition: A/CMV, SIMV, or SPONT

Select—Adjust (▲Up / ▼Down)—Accept

Select the Pressure Control or Volume Control button. Both the

LED indicator and target v

Adjust the blinking target value for the selected control with the
▲Up / ▼Down buttons.

Accept the new control and target value by either pressing the
selected b
new parameter for adjustment, or by waiting 5 seconds without
making a change.

Note: The transition to a new pressure or volume target may
require se

utton again; or by pressing another button to select a

veral breaths.

alue will blink.

Changing a Parameter (or Multiple Parameters)

Select—Adjust (▲Up / ▼Down)—Accept

Select the parameter by pressing the labeled button (i.e. ƒ, Ptrig,

The parameter’s numeric display will blink.

etc).

Adjust the numeric value with the ▲Up / ▼Down buttons.

Accept the value by either pressing the selected button again; or

by pressing another b
adjustment, or by waiting 5 seconds without making a change.

Enabling/Disabling Auto Panel Lock

Auto Panel Lock can be enabled or disabled via User Set Up (see
pg 3-27). When the Auto Panel Lock is enabled, the Panel will lock
30 seconds after the last button is pushed and the LED lights
green. All touch buttons (except Silence/Reset and Internal
Battery Test) are locked, preventing accidental parameter
changes.

utton to select a new parameter for

3-2 SERHT50NA A0808

NOTE: Auto P

To temporarily unlock parameters when Auto Panel Lock is active,
push the Push To unlock button for at least one second. The
Panel will relock 30 seconds after the last button is pushed.

anel Lock is factory preset to “Disabled” (off).

SECTION 3

SERHT50NA A0808 3-3

Figure 3-1

HT50 Ventilator Front Panel

(model HT50-H1, HT50-H1B)

DESCRIPTION OF CONTROLS, INDICATORS, ALARMS & CONNECTIONS

Newport HT50-H, HT50-HB (with built-in humidifier)

3-4 SERHT50NA A0808

Figure 3-2

FRONT PANEL CONTROLS & INDICATORS

Front panel controls that have corresponding LED indicators are
included with the description of the control.

The HT50 front panel is shown in Figure 3-1 on pg 3-3.

On / Standby

This button toggles between the following conditions:

Standby (if attached to external power, the battery is being charged)

g Setting (allows setting of control parameters) g On (enables

ventilation)

Standby: The HT50 is dormant and ventilation is not enabled. If
attached to e
LED is lit green, indicating that the internal battery is being charged.
The On/Standby indicator is not lit.

Setting: Pressing the On/Standby button once changes the

entilator from Standby to Setting condition.

v

gg

Standby

xternal power, the Ext. Power/ Charging Int. Battery

SECTION 3

MODE Control

NOTE: There is approximately a two second delay in going from

Standb
self test and will light all displays on the front panel.

During Setting condition, all adjustable LEDs are lit. This allows
the operator to preset and adjust controls prior to ventilation. The
On/Standby indicator is not lit. The Message Display Window
shows “Press ON to Vent,” suggesting that the On/Standby button
needs to be pressed if you want the HT50 to start ventilation.

On: Pressing the On/Standby b
ventilator from Setting to On. In the On condition, the HT50 is
ventilating and the On/Standby indicator is lit green.

Pressing the On/Standby button twice while in On condition turns
the ventilator from On to Standby.

The MODE control buttons enable the user to switch between the
following operational modes:

• A/CMV

• SIMV

• SPONT

y to Setting condition. During this time, the HT50 performs a

utton once more changes the

SERHT50NA A0808 3-5

In A/CMV and SIMV, mandatory breaths can be pressure
controlled or volume controlled. A green LED indicates which
operational mode is active.

DESCRIPTION OF CONTROLS, INDICATORS, ALARMS & CONNECTIONS

If the HT50 is in Setting condition, changes are made by pressing
the requested MODE button once. If in ON condition, changes are
made by pressing the requested MODE button twice. After the
first press, the Message Display Window reads “PRESS AGAIN”
and the requested MODE’s indicator starts to blink. If the
requested MODE button is not pressed within 5 seconds, the
change is cancelled.

A/CMV
(Assist / Control Mandatory Ventilation)

In A/CMV, the user may choose to pressure or volume control
mandatory breaths. In either case, all breaths delivered to the patient,
whether time (ventilator initiated) or patient-triggered, are the same.

The ƒ (frequency) setting determines the minimum number of
time-triggered mandatory breaths delivered each minute. The
Ptrig setting determines the airway pressure threshold that patient
effort must reach to trigger additional mandatory breaths. If
patient effort doesn’t cause airway pressure to drop enough to
meet the Ptrig threshold, or if the patient doesn’t breathe, the
HT50 will deliver the set ƒ (frequency) of mandatory breaths.

NOTE: If the Ptrig setting is not adjusted to a level that allows the
patient’s inspir
as CMV (control) mode.

atory effort to be detected, A/CMV mode performs

SIMV
(Synchronized Intermittent Mandatory Ventilation)

In SIMV, the user may choose to pressure or volume control
mandatory breaths. In either case, all mandatory breaths
delivered to the patient, whether time (ventilator initiated) or
patient-triggered, are the same. In addition, the user may choose
to pressure support the spontaneous breaths in between
mandatory breaths.

Unlike A/CMV, the ƒ (frequency) setting in this mode determines
the total rather than the minimum number of time (ventilator) or
patient triggered mandatory breaths delivered each minute.

The ƒ (frequency) setting also establishes a timing window which
determines whether a patient trigger results in a mandatory
breath or a spontaneous breath.

The Ptrig setting determines the airway pressure threshold that
patient effort must reach to trigger mandatory breaths and also to
trigger spontaneous breaths in between mandatory breaths.

3-6 SERHT50NA A0808

If patient effort doesn’t cause airway pressure to drop enough to
meet the Ptrig threshold or if the patient doesn’t breathe, the
HT50 will deliver the set ƒ (frequency) of mandatory breaths each
minute.