Keeler IntelliPuff Bedienungsanleitung

IntelliPuff

Non-contact Tonometer

Service Manual

ISSUE D

27/02/2014

ALWAYS READ THE INSTRUCTIONS

Keeler Limited, Clewer Hill Road, Windsor, Berks, United Kingdom. SL4 4AA.

Tel No. +44 (0) 1 753 857177Fax No. +44 (0) 1 753 830247

Intellipuff Service Manual

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CONTENTS

CONTENTS 2

Tools Required 3

Precautions 4

System Requirements 5

Software Installation Guide 6

intelliPuff - Principles of Operation 7

Calibration Principles 8

Boot Mode Programming 9

Calibration 13

Disassembly and Reassembly 25

Cleaning the Optics 26

Replacing the Air Filter 27

Replacing the Handset Assembly 28

Replacing the Pump Assembly 30

Replacing the Main PCB 32

Replacing the Printer Assembly 33

Handset 34

Trouble Shooting 41

Spare Parts List 50

Intellipuff Service Manual

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Tools Required

Most of the tools required will be in standard electro-mechanical toolkit.

In addition the following are required.

Pozi No 2 Screwdriver with a blade at least 200mm long

Torque Spanner – Tool No TD699 – available from Keeler Ltd

Intellipuff Service Manual

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Precautions

Adjustment or replacement of any of the active elements of the system will

result in the need to check the calibration and probably re-calibrate the unit.

This includes any of the optical or pneumatic active components with the

exception of the air filter.

Care should be taken when checking calibration not to drop the handset.

Normal antistatic precautions should be taken when handling any of the

electronic components including PCBs.

Intellipuff Service Manual

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System Requirements

Use of the Pulsair Calibration Jig requires the use of a PC. This PC has the

following minimum requirements:-

Desk top, Tower, or Laptop loaded with Windows XP (earlier versions of

Windows and Vista will not work reliably)

CD ROM drive to load software.

One free USB port

Printer if a hard copy of the results of calibration are required.

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Software Installation Guide

Load the CD provided into the PC and follow the instructions.

Intellipuff Service Manual

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intelliPuff - Principles of Operation

The intelliPuff handset is positioned in front of the eye being tested until it fires

the solenoid valve releasing a pulse of air which rises in pressure with time

and causes the surface of the eye being examined to deflect.

This deflection is monitored by the optical sensors within the handset and the

pressure noted for a given deflection. This is then translated from the internal

pressure curve to an inter-ocular pressure measured in millimetres of

mercury.

During calibration the unit’s internal curve is standardised by storing a number

of parameters determined during the calibration process by firing the handset

automatically against a calibrated pressure transducer. The values of these

parameters compensate for variations in the speed of operation of the

solenoid valve and the variations in the pneumatic path from one unit to

another.

Intellipuff Service Manual

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Calibration Principles

The calibration jig is set up against a standard unit and a number of

parameters are stored within the jig software. This ensures that the results

obtained from each calibration jig are the same.

The handset is located accurately on the calibration jig and the position of a

test eye is adjusted to the optimum position using the x, y, z adjustments on

the mounting platform of the test eye.

The eye is then replaced with the matched pressure transducer and several

sets of pressure readings are taken with varying drive pulse widths to the

solenoid valve.

The required parameters are then calculated and written to the internal

memory of the handset.

This ensures that the readings from the intelliPuff will be correct against the

standard.

It is possible to verify the calibration without resetting it.

The calibration jig can only be re-calibrated by Keeler Ltd and we recommend

that this is carried out annually by returning it to

Technical Service

Keeler Ltd

Clewer Hill Road

Windsor

SL4 4AA

United Kingdom

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Boot Mode Programming

From time to time the software in the intelliPuff may be updated to incorporate

the latest version based on Keeler’s continued research and development.

This process should not be undertaken unless instructed by Keeler. New

software will be issued and instructions on loading it to the main PC will be

given at that time.

The Pulsair 5000 intelliPuff can be programmed through its RS232 port. Both

the Hand unit and the base unit PCB (in this order) can be programmed this

way. Although the PCB’s come programmed from the manufacturer at the

testing stage, the boards are also programmed after calibration in order that

the latest code (current modification state) is applied.

The procedure to conduct boot mode programming follows a similar pattern to

the calibration in that the user is always prompted to do certain tasks to

facilitate this. The following series of forms guide the user in this task.

Initially when the bootmode program is fired, the form below is displayed with

the available serial port for programming.

The user then presses Program button to start programming the hand unit

PCB. The program instructs the user to set the dip switches on the back of the

tonometer to ON position prior to proceeding to the next stage as shown in the

form below.

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Following that, the program looks for the connected Pulsair to establish

communication, if this fails because of unit being switched off or cable not

connected, the form below is displayed advising the user to switch off unit

and try again providing the cable connection are made.

If however connection is established successfully, the form below is loaded

which looks for the instrument and then initiates bootmode controller loading

to prepare for programming the unit.

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