APC 2 Service Manual V1.2.x to V1.4.x April 2008

SERVICE MANUAL APC 2

Service Manual Art.-No. 80116-276

All rights to this manual, in particular rights of duplication, dissemination and translation, are reserved. No part of this manual may be reproduced in any form (by photocopying, microfilming or other methods) or processed, duplicated or disseminated by the use of electronic systems without the written consent of ERBE Elektromedizin GmbH. The information contained in this manual may be amended or supplemented without prior notice and represents no obligation on the part of ERBE Elektromedizin GmbH. Printed by ERBE Elektromedizin Printed in Germany Copyright © ERBE Elektromedizin GmbH, Tübingen 2007

TABLE OF CONTENTS

Table of Contents

Chapter 1

Title

Page

Safety information... 7 Classification of the safety information ...7 Knowledge of the User Manual...7 Protection from the risk of electric shock ...7 Handling of argon pressure cylinders ...8 Electrostatically sensitive components ...8 Liability and warranty ...8

2

Modifications ... 9

3

Controls... 11 Controls at the front ...11

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Controls at the rear ...13

4

Technical Data ... 15

5

Circuit Descriptions ... 17 Block diagram APC 2...18 Description of the various assemblies ...19 Pneumatic system ... 19 APC controller (open and closed-loop control) ... 19 IIF (Instrument Interface) ... 19

6

Setup and Service settings ... 21

7

Test programs ... 23

8

Adjustment... 25 Personnel requirements...25 Temperature conditions ...25 Test equipment ...25 Test setup ...26 Test procedure...27

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TABLE OF CONTENTS

9

Troubleshooting ... 29 ERROR list... 29 Testing and measuring equipment... 34

10

Maintenance and servicing... 37 Who is allowed to perform servicing and maintenance work? ... 37 What is a safety check? ... 37 How often does a safety check have to be performed? ... 37

11

Spare parts... 55 Circuit Boards ... 60 Receptacle modules ... 61 APC receptacles... 61 Bipolar receptacles ... 61 Monopolar receptacles ... 62 MF receptacle... 63

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Safety check – step by step ... 38 Safety information... 38 User manual and visual inspections ... 39 Tests to be conducted in accordance with the national specifications and regulations ... 39 Performance tests ... 39 Pressures ... 40 No leaks at 5 bar input pressure... 43 Purge function ... 45 Gas flow measurement... 46 Instrument recognition APC receptacle ... 48 Instrument recognition FiAPC receptacle ... 49 Instrument recognition MF receptacle ... 49 Fingerswitch activation APC 2 + VIO D ... 50 Fingerswitch activation APC 2 + VIO S ... 52 HF receptacle performance test ... 54

1 • Safety information

CHAPTER 1

Safety information

Classification of the safety information WARNING!

The WARNING! safety indication refers to a risk of personal injury.

CAUTION!

The CAUTION! safety indication refers to a risk of damage to property.

ATTENTION!

The ATTENTION! safety indication refers to a risk which can cause equipment to become unserviceable.

IMPORTANT!

The IMPORTANT! designation indicates application information and other particularly important information.

Knowledge of the User Manual Art.-Nr.: 80116-276 04.08

The User Manual for this unit constitutes an integral part of this Service Manual. For performing servicing activities it is assumed that the reader has knowledge of the User Manual, especially procedures for installation, putting into operation, and handling.

Protection from the risk of electric shock WARNING!

Disconnect the APC 2 from the electrosurgical unit (interconnection and ECB cable) before replacing parts inside the unit or cleaning the unit.

WARNING!

Do not touch any unprotected wires or conductive surfaces while the unit is opened and under voltage.

WARNING!

High-frequency voltages of over 1000 V are needed to ionize argon. Check that there is no damage to the electrical insulation of the applicators and all cords prior to use.

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1 • Safety information

Handling of argon pressure cylinders WARNING!

For some servicing work argon pressure cylinders must be connected to the APC 2. Before doing so, familiarize yourself with proper handling, in particular with the safety instructions for how to handle argon pressure cylinders. This information can be found in the user manual for the APC 2.

Electrostatically sensitive components CAUTION!

This unit contains electrostatically sensitive components. Work at an anti-static workplace while repairing the unit. Wear a grounding armband while working with electrostatically sensitive components. Hold the circuit boards by their non-conducting corners. Use an anti-static container for transporting electrostatically sensitive components and the circuit boards.

Liability and warranty Adjustments, tests, modifications, maintenance and repair work may only be performed by ERBE or persons trained by ERBE. If the work is not performed by trained persons, ERBE accepts no liability and warranty rights become void. It is recommended that the safety check also be performed by ERBE or persons trained by ERBE. ATTENTION!

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Only use original ERBE spare parts. The manufacturer accepts no liability and the warranty rights becomes void if original spare parts are not used.

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ATTENTION!

2 • Modifications

CHAPTER 2

Modifications

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The changes relevant to APC 2 vary depending on which VIO electrosurgical unit (VIO D or VIO S) the APC 2 is connected to. They are therefore only described in the service manuals for the VIO electrosurgical units.

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2 • Modifications

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3 • Controls

CHAPTER 3

Controls

IMPORTANT!

This chapter contains an overview of the controls of the unit(s). The relevant User Manual for the unit(s), knowledge of which is assumed for servicing work, provides detailed information about how to use the unit(s).

Controls at the front Version 1.2.x

ERBE A PC 2

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6

Fig. 3-1

1

Purge button

2

Focus button

3

Argon receptacle

4

Multifunctional receptacle

5

Pilot lamp "No ECB data link" (ERBE Communication Bus)

6

Pilot lamps for footswitches

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3 • Controls

As from version 1.3.x IMPORTANT!

As from V 1.3.x the APC module can take two receptacles. One of these receptacles must be a APC receptacle. The second receptacle can be either a HF receptacle or, as from V 1.4.x a second APC receptacle.

ERBE A PC 2

6

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1

Purge button

2

Focus button

3

Pilot lamps for footswitches

4

Multifunctional receptacle

5

Argon receptacle

6

Pilot lamp "No ECB data link" (ERBE Communication Bus)

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Fig. 3-2

3 • Controls

Controls at the rear

2 Ar

1

2

1

ECB

ECB

Fig. 3-3

Outlet bolt

2

Argon connection

3

Pressur sensor connection

4

ECB sockets (ERBE Communication Bus)

5

Potential equalization terminal

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1

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3 • Controls

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4 • Technical Data

CHAPTER 4

Technical Data

Connections Low voltage

via VIO electrosurgical unit

HF

via VIO electrosurgical unit

Terminal for potential equalisation

yes

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Gas specification Type of gas

Argon

Argon minimum purity

Argon 4.8 (99.998% purity) or higher, e.g. argon 5.0.

Density (relative; air = 1)

1.38

Critical temperature

–122 °C

Color

Colorless gas

Odor

No warning by smell

Concentration of explosion limit (vol. % in air)

Non-combustible

Special risks

Heat/fire can result in an increase in pressure causing the pressure gas bottle to explode! Gas in high concentrations can be suffocating!

Gas-specific unit data Supply pressure

(5 ± 2) x 105 Pa

5 ± 2 bar

72.5 ± 29 psi

Max. discharge pressure

2 x 105 ± 4 x 104 Pa

2 ± 0.4 bar

29 ± 5.8 psi

Variable gas flow

0.1 - 8 l/min limited by the instrument attached, adjustable in 0.1 l increments

Tolerance of the rated flow

(in range 0.2 - 5 l/min) ± 20 %

Purging flow

Depending on the instrument (corresponds to the setpoint flow of the instrument which is currently connected)

Purging time

3 sec.

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4 • Technical Data

Gas-specific unit data If you use a pressure cylinder, the residual volume display is activated at

7 x 105 Pa

Residual volume display

VIO display

Residual pressure display

Pressure gauge

The APC 2 switches off when the supply pressure is

< 3 x 105 Pa

7 bar

101.5 psi

< 3 bar

< 43.5 psi

Dimensions and weight Width x height x depth

410 x 80 x 370 mm

Weight

4.8 kg

Temperature

-40 °C to + 70 °C

Relative humidity

10% – 95%

Ambient conditions for operation of unit Temperature

+10 °C to + 40 °C

Relative humidity

15% – 80%, noncondensing

Acclimatizing If the unit has been stored or transported at temperatures below +10 °C or above +40 °C, the unit will require approx. 3 hours to acclimatize at room temperature.

Standards Classification according to EC Directive 93/42/ EEC

IIb

Type as per EN 60 601-1

CF

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Ambient conditions for transport and storage of unit

5 • Circuit Descriptions

CHAPTER 5

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Circuit Descriptions

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Fig. 5-1

U

2

1

ECB

p

DC

Operating Voltages +5V +/- 15V

DC

ECB = ERBE Communication Bus

ECB

Connector to VIO

0V

p

5 Bar

U

2,5 Bar

D

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Ventil-Ansteuerung und Überwachung Valves Driver and Control

Controller Unit

U p

Flow (pressure difference)

A

APC Controller

U p

Verteilerblock Distributor unit

AE NE AK IK

AE NE AK IK

nur bei 2 APC-Buchsen only with 2 APC receptacles

Instrument Interface

IIF

Instrument Interface

IIF

Connector to VIO

Flow (calorimetric)

SCI

SCI

NE

AE

APC MONO/BIPOL/MF/ APC

+24V

5 • Circuit Descriptions

Block diagram APC 2

5 • Circuit Descriptions

Description of the various assemblies Pneumatic system The argon gas is extracted from the gas cylinder at approx. 200 bar. Downstream of the pressure reducer unit it is available at the APC unit with approx. 5 bar. The pressure reducer unit is equipped with a high-pressure sensor which can be used to identify the level of gas in the cylinder. In the unit itself the internal supply pressure sensor is downstream of the input filter. A switching valve is then used to switch the gas to the control unit. This consists of the internal pressure reducer, which reduces the pressure to 2.5 bar, a proportional valve and the flow sensors. For redundancy reasons the flow is measured using two sensors based on different physical principles. One is designed as a differential pressure sensor which measures the differential pressure occurring at a specified bottleneck (stenosis). With the calorimetric flow sensor an electrically heated element is cooled by the gas flow. This cooling can be used to calculate the flow rate. The output is also equipped with another pressure sensor which is used to control the pressure in the instrument. This allows a blockage to be detected and the gas pressure maintained at non-critical levels.

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APC controller (open and closed-loop control) A switched mode power supply unit housed on the "APC controller" generates the necessary supply currents of +5 V, +15 V and –15 V from the +24 V input voltage. The processor controls the valves and also the flow according to the values measured by the sensors. The control voltage of the switching valves is reduced as soon as they have been energized. This prevents the excitation coil from overheating when switched on for lengthy periods. The "APC controller" receives its specified values from the control panel via the ERBE Communication Bus (ECB). The parameters for gas control are thus transmitted and the commands for switch-on and off issued before every activation. If a button is pressed on the APC 2, the "APC controller" signals this to the control panel via the ECB. In return it is informed which LED indicators must be switched on.

IIF (Instrument Interface) The instrument interface assembly may be found up to four times in the VIO system: twice in the electrosurgical unit and twice in the APC 2 unit and VEM 2 unit respectively. The IIF is used to provide the system with the key instrument information via an electrically isolated serial interface:

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5 • Circuit Descriptions

Activation recognition

The activation regognition checks whether one of the activation buttons (or ReMode button) has been pressed. It is designed to analyze the different coding systems (diode coding, resistor coding connected in parallel or series).

Receptacle recognition

The receptacle recognition can recognize the type of receptacle via the coding jumpers on the receptacle connectors.

Type number

Coding jumper Pin 2 - Pin 6

Coding jumper Pin 1 - Pin 6

Bipolar

1

–

X

Monopolar

2

X

–

Multifunctional (MF)1

3

X

X

APC

4

–

–

Receptacle type

1. Only relevant for VIO 300 D or in conjunction with a VIO 300 D.

The instrument recognition can identify instruments coded by resistance and read instruments equipped with an electronic memory, transmitting the relevant data to the system. This data is converted to CAN using the "CPU + Sensors" and sent to the control panel. The safety relays used to switch the HF voltage to the connected instrument on activation are also located on the IIF assembly. The actual circuit state of the relay is signaled to the system to ensure that defective relays or improper circuit states are detected. There are three IIF versions: • IIF ME: for monopolar instruments, equipped with a relay that can switch the activated electrode to the instrument. • IIF BE: for bipolar instruments and multifunctional instruments designed for bipolar use only. Each equipped with one relay for the activated electrode and patient plate. • IIF MF (only relevant for VIO 300 D or in conjunction with a VIO 300 D): equipped with 4 relays, which on multifunctional instruments with several electrodes allows a very wide range of configurations.

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Instrument recognition (only relevant for MF and APC receptacles)

6 • Setup and Service settings

CHAPTER 6

Setup and Service settings

The setup and service settings relevant to the APC 2 are called up and changed from the VIO electrosurgical unit to which the APC 2 is connected.

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The setup and service settings vary depending on which VIO electrosurgical unit (VIO D or VIO S) the APC 2 is connected to. They are therefore only described in the service manuals for the VIO electrosurgical units.

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