Nihon Kohden ZM 921PA, ZM 931PA Users manual

Transmitter

ZM-920PA/ZM-921PA ZM-930PA/ZM-931PA

If you have any comments or suggestions on this manual, please contact us at:

www.nihonkohden.com

0614-007205B

The entire contents of this manual are copyrighted by Nihon Kohden. All rights are reserved. No part of this document may be reproduced, stored, or transmitted in any form or by any means (electronic, mechanical, photocopied, recorded, or otherwise) without the prior written permission of Nihon Kohden.

GENERAL HANDLING PRECAUTIONS

This device is intended for use only by qualiﬁed medical personnel. Use only Nihon Kohden approved products with this device. Use of non-approved products or in a non-approved manner may affect the performance speciﬁcations of the device. This includes, but is not limited to, batteries, recording paper, pens, extension cables, electrode leads, input boxes and AC power.

Please read these precautions thoroughly before attempting to operate the instrument.

1. To safely and effectively use the instrument, its operation must be fully understood.

2. When installing or storing the instrument, take the following precautions:

(1) Avoid moisture or contact with water, extreme atmospheric pressure,

excessive humidity and temperatures, poorly ventilated areas, and dust, saline or sulphuric air.

(2) Placetheinstrumentonaneven,leveloor.Avoidvibrationand

mechanical shock, even during transport.

(3) Avoid placing in an area where chemicals are stored or where there is

danger of gas leakage.

(4) Pay extra attention when the instrument is in combination with other

instruments to avoid misdiagnosis or other problems.

(5) Choose a room where a proper grounding facility is available.

3. Before Operation

(1) Check that the instrument is in perfect operating order. (2) Check that the instrument is grounded properly. (3) Check that all cords are connected properly. (4) Pay extra attention when the instrument is in combination with other

instruments to avoid misdiagnosis or other problems. (5) All circuitry used for direct patient connection must be doubly checked. (6) Check that battery level is acceptable and battery condition is good when

using battery-operated models.

Operator’s Manual ZM-920PA/921PA/930PA/931PA i

4. During Operation

(1) Both the instrument and the patient must receive continual, careful

attention.

(2) Turn power off or remove electrodes and/or transducers when necessary to

assure the patient’s safety.

(3) Avoid direct contact between the instrument housing and the patient.

5. To Shutdown After Use

(1) Turn power off with all controls returned to their original positions. (2) Remove the cords gently; do not use force to remove them. (3) Clean the instrument together with all accessories for their next use.

6. The instrument must receive expert, professional attention for maintenance and repairs. When the instrument is not functioning properly, it should be clearly marked to avoid operation while it is out of order.

7. Theinstrumentmustnotbealteredormodiedinanyway.

8. Maintenance and Inspection:

(1) The instrument and parts must undergo regular maintenance inspection at

least every 6 months.

(2) If stored for extended periods without being used, make sure prior to

operation that the instrument is in perfect operating condition.

(3) Technical information such as parts list, descriptions, calibration

instructionsorotherinformationisavailableforqualiedusertechnical

personnel upon request from your Nihon Kohden representative.

9. When the instrument is used with an electrosurgical instrument, pay careful attention to the application and/or location of electrodes and/or transducers to avoid possible burn to the patient.

10.Whentheinstrumentisusedwithadebrillator,makesurethatthe instrumentisprotectedagainstdebrillatordischarge.Ifnot,remove

patient cables and/or transducers from the instrument to avoid possible damage.

ii Operator’s Manual ZM-910PA/921PA/930PA/931PA

WARRANTY POLICY

Nihon Kohden Corporation (NKC) shall warrant its products against all defects in materials and workmanship for one year from the date of delivery. However, consumable materials such as recording paper, ink, stylus and battery are excluded from the warranty.

NKC or its authorized agents will repair or replace any products which prove to be defective during the warranty period, provided these products are used as prescribed by the operating instructions given in the operator’s and service manuals.

No other party is authorized to make any warranty or assume liability for NKC’s products. NKC will not recognize any other warranty, either implied or in writing.

Inaddition,service,technicalmodicationoranyotherproductchangeperformed

by someone other than NKC or its authorized agents without prior consent of NKC may be cause for voiding this warranty.

Defective products or parts must be returned to NKC or its authorized agents, along with an explanation of the failure. Shipping costs must be prepaid.

Thiswarrantydoesnotapplytoproductsthathavebeenmodied,disassembled,

reinstalled or repaired without Nihon Kohden approval or which have been

subjectedtoneglectoraccident,damageduetoaccident,re,lightning,vandalism,

water or other casualty, improper installation or application, or on which the

originalidenticationmarkshavebeenremoved.

In the USA and Canada other warranty policies may apply.

CAUTION

United States law restricts this device to sale by or on the order of a physician.

Equipment Authorization Requirement

Operation of this equipment requires the prior coordination with a frequency coordinator designated by the FCC for the Wireless Medical Telemetry Service.

Operator’s Manual ZM-920PA/921PA/930PA/931PA iii

EMC RELATED CAUTION

This equipment and/or system complies with IEC 60601-2 International Standard for electromagnetic compatibility for medical electrical equipment and/or system. However, an electromagnetic environment that exceeds the limits or levels stipulated in IEC 60601-1-2, can cause harmful interference to the equipment and/or system or cause the equipment and/or system to fail to perform its intended function or degrade its intended performance. Therefore, during the operation of the equipment and/or system, if there is any undesired deviation from its intended operational performance, you must avoid, identify and resolve the adverse electromagnetic effect before continuing to use the equipment and/or system.

The following describes some common interference sources and remedial actions:

1. Strong electromagnetic interference from a nearby emitter source such as an authorized radio station or cellular phone:

Install the equipment and/or system at another location. Keep the emitter

source such as cellular phone away from the equipment and/or system, or turn off the cellular phone.

2. Radio-frequency interference from other equipment through the AC power supply of the equipment and/or system:

Identify the cause of this interference and if possible remove this

interference source. If this is not possible, use a different power supply.

3. Effect of direct or indirect electrostatic discharge:

Make sure all users and patients in contact with the equipment and/or

system are free from direct or indirect electrostatic energy before using it. A humid room can help lessen this problem.

4. Electromagnetic interference with any radio wave receiver such as radio or television:

If the equipment and/or system interferes with any radio wave receiver,

locate the equipment and/or system as far as possible from the radio wave receiver.

iv Operator’s Manual ZM-910PA/921PA/930PA/931PA

5. Interference of lightning: When lightning occurs near the location where the equipment and/or

system is installed, it may induce an excessive voltage in the equipment and/or system.

In such a case, disconnect the AC power cord from the equipment and/or

system and operate the equipment and/or system by battery power, or use an uninterruptible power supply.

6. Use with other equipment: When the equipment and/or system is adjacent to or stacked with other

equipment, the equipment and/or system may affect the other equipment. Before use, check that the equipment and/or system operates normally with the other equipment.

7. Use of unspeciﬁed accessory, transducer and/or cable: When an unspeciﬁed accessory, transducer and/or cable is connected to

this equipment and/or system, it may cause increased electromagnetic emission or decreased electromagnetic immunity. The speciﬁed conﬁguration of this equipment and/or system complies with the electromagnetic requirements with the speciﬁed conﬁguration. Only use this equipment and/or system with the speciﬁed conﬁguration.

8. Use of unspeciﬁed conﬁguration: When the equipment and/or system is used with the unspeciﬁed system

conﬁguration different than the conﬁguration of EMC testing, it may cause increased electromagnetic emission or decreased electromagnetic immunity.

Only use this equipment and/or system with the speciﬁed conﬁguration.

9. Measurement with excessive sensitivity: The equipment and/or system is designed to measure bioelectrical signals

with a speciﬁed sensitivity. If the equipment and/or system is used with excessive sensitivity, artifact may appear by electromagnetic interference and this may cause mis-diagnosis. When unexpected artifact appears, inspect the surrounding electromagnetic conditions and remove this artifact source.

If the above suggested remedial actions do not solve the problem, consult your Nihon Kohden representative for additional suggestions.

Operator’s Manual ZM-920PA/921PA/930PA/931PA v

Conventions Used in this Manual and Instrument

Warnings, Cautions and Notes

Warnings, cautions and notes are used in this manual to alert or signal the reader

tospecicinformation.

WARNING

A warning alerts the user to the possible injury or death associated with the use or misuse of the instrument.

CAUTION

A caution alerts the user to possible injury or problems with the instrument associated with its use or misuse such as instrument malfunction, instrument failure, damage to the instrument, or damage to other property.

NOTE

A note provides speciﬁc information, in the form of recommendations, prerequirements, alternative methods or supplemental information.

vi Operator’s Manual ZM-910PA/921PA/930PA/931PA

Explanations of the Symbols in this Manual and Instrument

The following symbols found in this manual/instrument bear the respective descriptions as given.

Symbol Description Symbol Description

Power On

Attention, consult operator’s manual

Power Off Nurse call

Debrillationprooftype

BF applied part

Debrillationprooftype

CF applied part

Direct current

Replace battery

Check electrode

Operator’s Manual ZM-920PA/921PA/930PA/931PA vii

Introduction

The ZM-920PA/ZM-921PA/ZM-930PA/ZM-931PA transmitter transmits ECG and other data from a patient to a Nihon Kohden monitor for continuous monitoring. Available parameters and functions vary between the models. Read the operator’s manual for the monitor before operation.

Model

ZM-920PA ZM-921PA

ZM-930PA ZM-931PA

The transmission frequency range is as follows. ZM-920PA/930PA: 608.0250 MHz (channel number 9002) to 613.9750 MHz

ZM-921PA/931PA: 1395.0250 MHz (channel number E002) to 1399.9750 MHz

1427.0250 MHz (channel number E502) to 1431.9750 MHz

The transmitter channel can be changed by the QI-901PK Channel Writer. To change the channel number, refer to the channel writer manual.

Parameters Functions

The following information is indicated

• ECG

• Impedance respiration

• ECG

• Impedance respiration

• SpO

(channel number 9478)

(channel number E398)

(channel number E898)

by LED.

• Check ECG electrodes

• Replace batteries

The following information is indicated on LCD.

• SpO2 value

• Pulse wave amplitude

• Replace batteries The following information is indicated by LED.

• Check ECG electrodes

Operator’s Manual ZM-920PA/921PA/930PA/931PA 1

WARNING

The following actions must be taken to properly receive the transmitter signal of the correct patient on the receiving instrument. Otherwise, there may be signal loss or signals may mix causing a serious accident, such as monitoring a different patient.

• Assign a channel administrator in the hospital and only he or she should manage channel assignment.

• The channel administrator must manage the channels in the facility so that there is no signal interference.

• When the transmitter channel is changed, the channel administrator must check that the channel on the receiving monitor is also changed and the signal is properly received.

• The channel administrator must replace the channel number label on the transmitter with the new one after changing the channel.

WARNING

Do not use the same transmitter on more than one patient at the same time. Do not connect different sensors on different patients to the same transmitter.

CAUTION

• Do not use the same channel for different patients. If the same channel is used for two patients, the two patients’ data will be lost due to mutual modulation interference, or another patient’s data may appear on the receiving monitor screen.

• Do not use transmitters of adjacent channels in a hospital. If a transmitter of an adjacent channel is used, radio waves from one transmitter affect the receiver of the adjacent channel’s transmitter and there may be interference.

2 Operator’s Manual ZM-920PA/921PA/930PA/931PA

NOTE

• To prevent interference between channels, assign a channel administrator in the hospital and only he or she should manage channel assignment.

• Use Nihon Kohden parts and accessories to assure maximum performance from your instrument.

• For stable signal reception, it is recommended to use a diversity antenna system on the receiving monitor. Otherwise, spike noise from transient fading of electric ﬁeld strength (for example, people moving) may interfere with the transmitter signal and may be mistaken as an arrhythmia on the receiving monitor.

• Do not diagnose a patient based on only part of the monitoring data on the transmitter or only on the data acquired by the transmitter. Overall judgement must be performed by a physician who understands the features, limitations and characteristics of the transmitter by reading this operator’s manual thoroughly and by reading the biomedical signals acquired by other instruments.

• For details on the receiving monitor and upgrade information, contact your Nihon Kohden representative.

Operator’s Manual ZM-920PA/921PA/930PA/931PA 3

Panel Description

Top Panel

For attaching a strap

Refer to the warnings below

Refer to the symbol page

ECG/RESP socket

Connects to the electrode lead for measuring ECG and/or respiration by the impedance method.

ZM-930PA/931PA only

SpO2 socket

Connects to the SpO2 probe.

Refer to the symbol page

Refer to the warnings below

WARNING

When performing deﬁbrillation, discharge as far as possible from electrodes, patches and any gel, cream or medicine on the chest of the patient. If there is a possibility that the deﬁbrillator paddle could touch these materials, remove them from the patient. If the deﬁbrillator paddle directly contacts these materials, the discharged energy may cause skin burn to the patient.

WARNING

Before deﬁbrillation, all persons must keep clear of the bed and must not touch the patient or any equipment or cord connected to the patient. Failure to follow this warning may cause electrical shock or injury.

4 Operator’s Manual ZM-920PA/921PA/930PA/931PA

Front Panel

RALALL

Va Vb

USAch

E002

1395.025 MHz

ZM-920PA/921PA

Power switch

Turns transmitter power on or off.

Replace batteries LED

Lights when the batteries need replacement.

CALL key

When this key is pressed, a “peep” sounds at the transmitter, and “CALL” message appears at the

Check electrodes LED

Lights when the electrode is detached from the patient.

monitor. Depending on the settings on the monitor, an ECG waveform is recorded when this key is pressed.

Refer to the warning below. Battery case

Contains two 1.5 V dry cell batteries (AA).

WARNING

Close the battery case cover during operation. If the transmitter is used with the battery case cover open, anyone who touches the opened battery case may receive an electrical shock when deﬁbrillation is performed. Touching the opened battery case may cause electrostatic discharge and intermittently interfere with the waveform or data.

Only use your ﬁnger to press the CALL key. Do not press the key with a sharp object. Otherwise the key may be damaged.

CAUTION

Operator’s Manual ZM-920PA/921PA/930PA/931PA 5

ZM-930PA/931PA

RALALL

Va Vb

USAch

E002

1395.025 MHz

RALALL

Va Vb

USAch

E002

1395.025 MHz

Battery replacement mark:

Appears when the batteries are weak. Immediately replace the batteries when this appears.

For the descriptions except for the LCD, refer to the “ZM-920PA/921PA” section on the previous page.

LCD

%SpO2:

Displayed when the power is turned on. This indication is not displayed when SpO2 display is turned off.

Pulse level bar graph:

Displays pulse level in

SpO2 data:

7 steps.

Displays SpO2 data. When SpO2 is 41 to 100%, the value is displayed. (ex. ) When SpO2 is under 40%, “ ” is displayed. When the detected pulse is too small to measure, “ ” is displayed.

6 Operator’s Manual ZM-920PA/921PA/930PA/931PA

Important Safety Information

General

WARNING

Never use the transmitter in the presence of any ﬂammable anesthetic gas or high concentration oxygen atmosphere. Failure to follow this warning may cause explosion or ﬁre.

WARNING

Never use the transmitter in a hyperbaric oxygen chamber. Failure to follow this warning may cause explosion or ﬁre.

WARNING

Do not take this transmitter into the MRI test room. This transmitter is not designed to be used during MRI tests.

WARNING

When performing MRI test, remove all electrodes from the patient which are connected to this transmitter. Failure to follow this warning may cause skin burn on the patient. For details, refer to the MRI manual.

WARNING

Operator’s Manual ZM-920PA/921PA/930PA/931PA 7

WARNING

When the transmitter is used with an electrosurgical unit (ESU), ﬁrmly attach the entire area of the ESU return plate. Otherwise, the current from the ESU ﬂows into the electrodes of the transmitter, causing electrical burn where the electrodes are attached. For details, refer to the ESU manual.

WARNING

If detergent or liquid spills into the transmitter, clean it and dry it completely before use. If a wet transmitter is used, the patient or operator may receive an electrical shock or injury.

WARNING

Do not use the same transmitter on more than one patient at the same time. Do not connect different sensors on different patients to the same transmitter.

8 Operator’s Manual ZM-920PA/921PA/930PA/931PA

CAUTION

Only use Nihon Kohden speciﬁed electrodes, electrode leads and SpO2 probes. Otherwise, the maximum performance from the transmitter cannot be guaranteed.

CAUTION

Do not reuse disposable parts and accessories.

CAUTION

Do not shake or swing the transmitter while holding the leads or cables connected to the transmitter. The transmitter may come off and injure someone or damage surrounding instruments.

CAUTION

Attach a strap to the transmitter to prevent the transmtiter from falling.

CAUTION

Turn off the power of mobile phones, small wireless devices and other devices which produce strong electromagnetic interference around a patient (except for devices allowed by the hospital administrator). Radio waves from devices such as mobile phones or small wireless devices may be mistaken as pulse waves and the displayed data may be incorrect.

Operator’s Manual ZM-920PA/921PA/930PA/931PA 9

CAUTION

Battery

WARNING

• Keep the batteries away from ﬁre. They may explode.

• Keep the batteries away from patients.

• Never short-circuit the + and – terminals on the battery. It may cause overheating and ﬁre.

• Do not damage, disassemble, drop or give impact to the battery.

WARNING

If the battery is damaged and the substance inside the battery contacts the eyes or skin, wash immediately and thoroughly with water and see a physician. Never rub your eyes, because you may lose your eyesight.

CAUTION

Battery replacement must be performed by the operator. When replacing batteries of the transmitter currently used for a patient, disconnect electrode leads from the transmitter before replacing batteries or do not touch the patient during replacement.

10 Operator’s Manual ZM-920PA/921PA/930PA/931PA

CAUTION

The battery charger must be used outside the patient environment.

CAUTION

Refer to the battery and battery charger manuals for details on handling the batteries.

Transmitter Channel Management

WARNING

• Assign a channel administrator in the hospital and only he or she should manage channel assignment.

• The channel administrator must manage the channels in the facility so that there is no signal interference.

• When the transmitter channel is changed, the channel administrator must check that the channel on the receiving monitor is also changed and the signal is properly received.

• The channel administrator must replace the channel number label on the transmitter with the new one after changing the channel.

Operator’s Manual ZM-920PA/921PA/930PA/931PA 11

For Patients Using Implantable Pacemaker

WARNING

Interaction Between Minute Ventilation Rate-Adaptive Pacemakers and Cardiac Monitoring and Diagnostic Equipment The bioelectric impedance measurement sensor of a minute ventilation rate-adaptive implantable pacemaker may be affected by transmitter which is connected to the same patient. If this occurs, the pacemaker may pace at its maximum rate and the transmitter may give incorrect data to the monitor. If this occurs, disconnect the electrode leads from the patient or change the setting on the pacemaker by referring to the pacemaker’s manual. For more details, contact your pacemaker representative or Nihon Kohden representative.

Output Signal

WARNING

Do not use the output signal from the receiving monitor as the synchronization signal for other equipment such as IABP, MRI, echocardiography or deﬁbrillator. There may be time delay between the monitor and the other equipment caused by waveform transmission delay and spike noise may interfere on the output signal and be mistaken as a trigger.

12 Operator’s Manual ZM-920PA/921PA/930PA/931PA

ECG Monitoring

CAUTION

Only use Nihon Kohden speciﬁed electrodes and electrode leads. When other type of electrodes or electrode leads are used, the “CHECK ELECTRODES” message may be displayed and monitoring may stop.

CAUTION

When the “ELECTRODE OFF” or “CHECK ELECTRODE” message is displayed on the receiving monitor, ECG is not monitored properly and the ECG alarm does not function. Check the electrode, electrode leads, and if necessary, replace with new ones.

SpO2 Monitoring

WARNING

SpO2 measurement may be incorrect in the following cases.

• When the patient’s carboxyhemoglobin or methemoglobin increases abnormally.

• When dye is injected in the blood.

• When using an electrosurgical unit.

• During CPR.

• When measuring at a site with venous pulse.

• When there is body movement.

• When the pulse wave is small (insufﬁcient peripheral circulation).

Operator’s Manual ZM-920PA/921PA/930PA/931PA 13

WARNING

Check the circulation condition by observing the skin color at the measurement site and pulse waveform. Change the measurement site every 8 hours for disposable probes and every 4 hours for reusable probes (every 8 hours for TL-630T/TL-631T series probe). The skin temperature may increase at the attached site by 2 or 3°C (4 or 5°F) and cause a burn or pressure necrosis. When using the probe on the following patients, take extreme care and change the measurement site more frequently according to symptoms and degree.

• Patient with a fever

• Patient with peripheral circulation insufﬁciency

• Neonate or low birth weight infant with delicate skin

• Patient who is receiving photodynamic therapy*

* Photodynamic therapy is a treatment to remove the affected tissue by using a

photosensitizing agent and exposing the tissue to light. This treatment has a side

effectofphotosensitivityandthelightfromthengerprobesensormaycause

a burn. This probe uses two light wavelengths in the range from 650 to 950 nm. The maximum light intensity is less than 5.5 mW/sr.

WARNING

When not monitoring SpO2, disconnect the SpO2 cable from the transmitter. Otherwise, noise from the probe sensor may interfere and incorrect data is displayed on the screen.

14 Operator’s Manual ZM-920PA/921PA/930PA/931PA

WARNING

• When using the TL-201T ﬁnger probe, do not fasten the probe and cable to the ﬁnger by wrapping with tape. This may cause burn, congestion or pressure necrosis from poor blood circulation.

• When using probes other than the TL-201T ﬁnger probe, to avoid poor circulation, do not wrap the tape too tight. Check the blood circulation condition by observing the skin color and congestion at the skin peripheral to the probe attachment site. Even for shortterm monitoring, there may be burn or pressure necrosis from poor blood circulation, especially on neonates or low birth weight infants whose skin is delicate. Accurate measurement cannot be performed on a site with poor peripheral circulation.

CAUTION

While a patient is on medication which causes vasodilation, the pulse waveform may change and in rare cases the SpO2 value might not be displayed.

CAUTION

Normal external light does not affect monitoring but strong light such as a surgical light or sunlight may affect monitoring. If affected, cover the measuring site with a blanket.

CAUTION

If the attachment site is dirty with blood or bodily ﬂuids, clean the attachment site before attaching the probe. If there is nail polish on the attachment site, remove the polish. Otherwise, the amount of transmitted light decreases, and measured value may be incorrect or measurement cannot be performed.

Operator’s Manual ZM-920PA/921PA/930PA/931PA 15

CAUTION

Do not use a probe which is deteriorated by aging. Accurate measurement cannot be performed.

CAUTION

Do not use a damaged or disassembled probe. It causes incorrect measurement and may injure the patient.

CAUTION

The disposable probe is not sterilized. Use the disposable probe only for a single patient. Never reuse the disposable probe for another patient because it causes cross infection.

CAUTION

If the skin gets irritated or redness appears on the skin from the probe, change the attachment site or stop using the probe. Take extreme care for the patients with delicate skin.

CAUTION

Do not pull or bend the probe cable, and do not put caster feet on the probe cable. Do not immerse the probe cable in chemical solutions or water. Failure to follow these instructions may cause cable discontinuity, short circuit, skin burn on the patient and incorrect measurement data. Replace any broken probe with a new one.

CAUTION

When the probe is attached on an appropriate site with sufﬁcient circulation and the error message conﬁrming the probe attachment repeatedly appears, the probe may be deteriorated. Replace it with a new one.

16 Operator’s Manual ZM-920PA/921PA/930PA/931PA

CAUTION

When a message indicates a faulty probe, stop monitoring and replace the probe with a new one.

CAUTION

When any of the following conditions occurs, the probe may be broken. Replace it with a new one.

• The transmitter generates “pip” sounds.

• SpO

data is 85% and blinking.

CAUTION

Neonatal skin is delicate. Remove the probe and tape carefully and slowly.

CAUTION

When removing a probe that is taped to the skin, do not pull the probe cable because this can damage the cable.

CAUTION

When removing the probe from the attachment tape, do not pull the sensor cable because this can damage the cable.

CAUTION

Do not immerse the disposable probe in detergents or water. If the probe adhesive surface gets wet, adhesiveness becomes weak and the probe cannot be attached to the skin.

CAUTION

Refer to the probe instruction manual for details.

Operator’s Manual ZM-920PA/921PA/930PA/931PA 17

Maintenance

CAUTION

If detergent or liquid spills into the transmitter, clean it and dry it completely before use. If a wet transmitter is used, the transmitter may malfunction or get damaged.

CAUTION

Never disassemble or repair the transmitter. Disassembly and repair must be performed by qualiﬁed service personnel.

CAUTION

Before cleaning or disinfection, remove the batteries from the transmitter. Failure to follow this instruction may result in electrical shock or transmitter malfunction.

CAUTION

The transmitter cannot be sterilized. Sterilizing the transmitter may damage it.

18 Operator’s Manual ZM-920PA/921PA/930PA/931PA

Preparation

Installing (Replacing) Batteries

Use two AA(R6) type alkaline dry cell batteries, manganese dry cell batteries, NiCd rechargeable batteries or NiMH batteries.

Battery Lifetime

With new alkaline batteries, the transmitter can continuously measure for the following number of days. Operation time depends on the thickness of the SpO2 probe attachment site.

Transmitter

ZM-920PA/930PA 3 days 4 days

ZM-921PA/931PA 2.5 days 3.5 days

The capacity of manganese, NiCd and NiMH batteries is less than that of alkaline batteries, therefore the lifetime of the battery is shorter.

Type Lifetime

Manganese About 1/2 of alkaline batteries

NiCd About 1/3 of alkaline batteries (when fully charged)

NiMH About 1/2 of alkaline batteries (when fully charged)

Recommended Batteries

Alkaline primary: Nihon Kohden Medipower (equivalent to Panasonic LR6 (G))

Operating time (Measuring parameters)

ECG, Resp, SpO

NOTE

ECG, Resp

CAUTION

Operator’s Manual ZM-920PA/921PA/930PA/931PA 19

If electrode leads are attached to the patient and the person replacing the batteries touches the patient, the patient leakage current over the amount allowed may occur.

CAUTION

• Replace all batteries at the same time.

• Do not use different types of batteries together.

NOTE

Insert the batteries with the correct polarity (+ and −).

Procedure

1. Open the battery case cover.

2. Insert two dry cell batteries (LR6) into the battery case observing the correct polarity.

3. Close the cover and press it gently until it clicks.

WARNING and CAUTION for Battery Handling

WARNING

• Keep the batteries away from ﬁre. They may explode.

• Keep the batteries away from patients.

• Never short-circuit the + and – terminals on the battery. It may cause overheating and ﬁre.

• Do not damage, disassemble, drop or give impact to the battery.

20 Operator’s Manual ZM-920PA/921PA/930PA/931PA

WARNING

CAUTION

Do not handle the batteries with wet hands.

CAUTION

When the transmitter is not in use, remove batteries. When batteries are installed, battery power is consumed even if measurement is not performed. Especially, when NiMH batteries remain in the transmitter when the transmitter is not in use, the battery may become unusable from overdischarge and leak liquid which will damage the transmitter.

CAUTION

Refer to the battery and battery charger manuals for details on handling the batteries.

CAUTION

The battery charger must be used outside the patient environment.

NOTE

• When using rechargeable NiCd batteries or NiMH batteries, shallow charging/discharging shortens battery capacity. For details, refer to the battery operator’s manual.

• Remove the batteries from the transmitter before disposing of the transmitter.

Operator’s Manual ZM-920PA/921PA/930PA/931PA 21

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