manual de servicio balanza de humedad MB45 ohaus

Ohaus Corporation 19A Chapin Road P.O. Box 2033, Pine Brook, NJ 07058-2033

MB45 MOISTUR MOISTURE E ANALYZER ANALYZER SERVICE MANUAL

Ohaus Corporation 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ 07058-2033 (973) 377-9000

SERVICE MANUAL

MB45 MOISTURE ANAL A NALYZER YZER

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E     n    t    e    r    P     r    i     n    t    T     A    R     E    

Ohaus Corporation 19A Chapin Road P.O. Box 2033 Pine Brook, NJ 07932-0900 The information contained in this manual is believed to be accurate at the time of publication, but Ohaus Corporation assumes no liability arising from the use or misuse of this material. Reproduction of this material is strictly prohibited. Material in this manual is subject to change.  © Copyright 2006 Ohaus Corporation, all rights reserved.  ® Registered trademark of Ohaus Corporation.

TABLE OF CONTENTS CHAPTER 1 INTRODUCTION Page 1.1 Introdu Introductio ction n ..... .......... .......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... .......... .......... ......... ......... ......... ......... ....... .. 1-1 1.2 Serv Service ice Fac Faciliti ilities es .... ......... .......... .......... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... ......... ....... ... 1-1 1.3 Tool Tools s and Test Equipme Equipment nt Required Required ..... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... ....... 1-2 1.3.1 1.3 .1 Spe Special cial Tool Tools s ..... .......... ......... ......... ......... ......... .......... .......... ......... ......... .......... .......... ......... ......... ......... ......... .......... ....... .. 1-2 1.3.2 1.3 .2 Too Tools ls and Sup Supplie plies s ..... .......... ......... ......... ......... ......... .......... .......... ......... ......... ......... ......... ......... ......... ......... ....... ... 1-2 1.4 Test Mas Mass s Requ Required ired..... ......... ......... ......... ......... ......... ......... ......... ......... .......... .......... ......... ......... ......... ......... ......... ......... ....... .. 1-2 1.5 Speci Specificati fications ons ..... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... ....... .. 1-2 1.5.1 1.5 .1 Admi Admissab ssable le Ambi Ambient ent Cond Conditio itions ns ..... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ........ ...1-2 1-2 CHAPTER 2.1 2.2 2.3

2 OPERATION Menu Stru Structur cture e .... ......... ......... ......... .......... .......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... .......... ......... ....2-1 2-1 Control Con trol Swi Switch tch Fun Functio ctions......... ns.............. ......... ......... ......... ......... .......... .......... ......... ......... ......... ......... ......... ....... ... 2-2 Adjustin Adju sting g the Displ Display ay Contra Contrast st and Brigh Brightnes tness s .... ......... .......... ......... ......... .......... ......... ...... 2-3

CHAPTER 3 TROUBLESHOOTING 3.1 Troub Troublesho leshooting oting ..... ......... ......... ......... ......... .......... .......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... ......... ....3-1 3-1 3.2 Trou Troubles bleshoot hooting ing Guid Guide e .... ......... ......... ......... .......... ......... ......... ......... ......... .......... ......... ......... ......... ......... .......... ......... ...... .. 3-1 3.2.1 3.2 .1 Diagnosis........ Diagnosis............ ......... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... .......... .......... ........ ... 3-1 CHAPTER 4 MAINTENANCE PROCEDURES 4.1 Prev Preventi entive ve Main Mainten tenance ance ..... ......... ......... ......... ......... .......... .......... .......... .......... .......... .......... ......... ......... .......... .......... ....... 4-1 4.1.1 4.1 .1 Visu Visual al Insp Inspecti ection on .... ......... ......... ......... ......... ......... .......... .......... ......... ......... ......... ......... ......... ......... ......... ......... ........ ... 4-1 4.1.2 4.1. 2 Preventi Preventive ve Maintena Maintenance nce Checklis Checklistt ................. ................................... ................................. ...............4-1 4-1 4.2 4. 2 Te Test stin ing g .... .. .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... ....4-2 ..4-2 4.2.1 4.2 .1 Ope Operati rationa onall Tes Testt ..... .......... ......... ......... .......... .......... ......... ......... .......... .......... ......... ......... ......... ......... .......... .......... ....... 4-2 4.2.1. 4.2 .1.1 1 Disp Display lay Tes Testt ..... .......... .......... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... ....... .. 4-2 4.2.2 4.2 .2 Weig Weight ht Cal Calibra ibration tion ..... .......... .......... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... ....... 4-3 4.2.3 4.2 .3 Temp Temperat erature ure Cali Calibrat bration ion .... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... .......... ....... .. 4-4 4.2.4 4.2 .4 Perf Performa ormance nce Test Tests s ..... .......... ......... ......... ......... ......... .......... .......... ......... ......... .......... .......... ......... ......... .......... ........ ... 4-5 4.2.4. 4.2 .4.1 1 Pre Precisi cision on Tes Testt ..... ......... ......... .......... .......... .......... .......... ......... ......... .......... .......... .......... .......... ......... ....4-5 4-5 4.2.4. 4.2 .4.2 2 OffOff-Cen Center ter Load Test ..... .......... ......... ......... .......... .......... ......... ......... .......... .......... ......... ......... .....4-6 4-6 4.2.4. 4.2 .4.3 3 Cen Centere tered d Load Tes Testt ..... .......... .......... .......... ......... ......... .......... .......... .......... .......... ......... ......... ....... 4-6 4.2.4. 4.2 .4.4 4 Visu Visual al Insp Inspecti ection on ..... ......... ......... .......... .......... ......... ......... ......... ......... .......... .......... ......... ......... ....... .. 4-6 4.3 Rep Repairi airing ng the Mois Moisture ture Anal Analyzer yzer..... ......... ......... .......... .......... ......... ......... ......... ......... ......... ......... ......... ......... ....... 4-6 4.3.1 4.3 .1 Rep Repairi airing ng the Dry Drying ing Unit .... ......... .......... ......... ......... ......... ......... .......... ......... ......... ......... ......... ......... ........ ....4-7 4-7 4.3.1. 4.3 .1.1 1 Dism Dismantl antling ing the Heating Heating Module Module ..... ......... ......... .......... .......... ......... ......... ......... ...... .. 4-7 4.3.2 4.3 .2 Rep Replaci lacing ng the Pro Protect tective ive Glass and Reflector....... Reflector............ ......... ......... .......... .......... ....... .. 4-8 4.3.2. 4.3 .2.1 1 Rep Replaci lacing ng the Protect Protective ive Glass Glass and Reflec Reflector tor ..... ......... ......... ..........4-8 .....4-8 4.3.2. 4.3 .2.2 2 Inst Installi alling ng Protectiv Protective e Glass and Reflector Reflector .... ......... ......... ......... .......... ......... ....4-8 4-8 4.3.3 4.3 .3 Rep Replaci lacing ng the Halogen Halogen Lamp ..... .......... .......... ......... ......... ......... ......... ......... ......... .......... ......... ......... ....... 4-8 4.3.3. 4.3 .3.1 1 Dism Dismantl antle e Hal Haloge ogen n Lam Lamp p ..... .......... ......... ......... .......... .......... .......... .......... ......... ......... ....... .. 4-8 4.3.3. 4.3 .3.2 2 Inst Installi alling ng the Hal Halogen ogen Lamp ..... .......... .......... .......... ......... ......... .......... .......... .......... ....... .. 4-9 4.3.4 4.3 .4 Rep Replaci lacing ng the Tem Tempera perature ture Controller Controller..... .......... .......... .......... ......... ......... .......... .......... ..........4-9 .....4-9 4.3.5 4.3 .5 Rep Replaci lacing ng the Temp Tempera erature ture Sensor Sensor ..... ......... ......... .......... .......... ......... ......... .......... .......... ........ ... 4-10 i

TABLE OF CONTENTS (Cont.) CHAPTER 4 MAINTENANCE PROCEDURES  (Cont.) 4.3.6 Installing the Heating Module .......................................................4-10 4.3.7 Removing Housing Top ................................................................ 4-11 4.3.8 Removing the Membrane Keypad ................................................ 4-13 4.3.9 Installing the Membrane Keypad .................................................. 4-13 4.3.10 Replacing the Display................................................................... 4-14 4.3.11 Replacing the Fan ........................................................................4-14 4.3.12 Replacing the CPU Board ............................................................ 4-15 4.3.13 Replacing the Power Supply Board .............................................. 4-16 4.3.14 Replacing the Weighing Cell ........................................................ 4-17 4.3.15 Replacing the Housing Base ........................................................ 4-18 4.3.16 Installing the Housing Top..............................................................4-19 4.4 Resetting the Thermal Overload Device ................................................ 4-20 4.5 Final Work Steps ................................................................................... 4-21 CHAPTER 5 DRAWINGS AND PARTS LISTS 5.1 Drawings and Parts Lists ........................................................................ 5-1 5.1.1 Top Housing ...................................................................................5-2 5.1.2 Bottom Housing ..............................................................................5-4 5.1.3 Dryer Unit ........................................................................................ 5-7 APPENDIX A SOFTWARE SERVICE TOOL INSTRUCTIONS A.1 Software Service Tool Instructions ...................................................... A-1 A.2 Requirements ...................................................................................... A-1 A.3 Instructions and Notes ......................................................................... A-1 A.4 Error Messages................................................................................... A-4

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TABLE OF CONTENTS (Cont.) LIST OF TABLES TABLE NO. 1-1 2-1 3-1 4-1 5-1 5-2 5-3

TITLE

PAGE NO.

Specifications ................................................................................. 1-2 Menu structure ................................................................................2-1 Diagnostic Guide ............................................................................ 3-2 Types of Performance Tests ........................................................... 4-5 Spare Parts List Top Housing ......................................................... 5-3 Spare Parts List Bottom Housing ....................................................5-5 Spare Parts List Dryer Unit ............................................................. 5-7 LIST OF ILLUSTRATIONS

FIGURE NO.

TITLE

PAGE NO.

4-1 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 4-10 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 4-20 4-21 4-22 4-23 4-24 4-25 4-26

Access for Cleaning MB45 Moisture Analyzer ................................4-1 Display Test ....................................................................................4-2 Dismantling the Heating Module..................................................... 4-7 Removing the Heating Module ....................................................... 4-7 Replacing Protective Glass ............................................................4-8 Replacing Halogen Lamp ............................................................... 4-8 Installing the Halogen lamp ............................................................4-9 Replacing Temperature Controller..................................................4-9 Replacing Temperature Sensor ....................................................4-10 Installing Heat module ..................................................................4-10 Replacing Cover ...........................................................................4-11 Remove Housing .......................................................................... 4-11 Remove Cable from Display .........................................................4-12 Remove Connectors .....................................................................4-12 Remove Membrane Keypad ......................................................... 4-13 Install Membrane Keypad ............................................................. 4-13 Replacing Display ........................................................................4-14 Replacing Fan ..............................................................................4-14 Replacing CPU Board ..................................................................4-15 Replacing Power Supply Board.................................................... 4-16 Replacing Weighing Cell .............................................................. 4-17 Replace Housing Base ................................................................. 4-18 Install Housing Top ....................................................................... 4-19 Plug in Cables ..............................................................................4-19 Housing Top Reassembly.............................................................. 4-20 Resetting the Thermal Overload Device ........................................ 4-20

5-1 5-2 5-3

Top housing ....................................................................................5-2 Bottom Housing ..............................................................................5-4 Dryer Unit........................................................................................ 5-6 iii

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CHAPTER 1 INTRODUCTION 1.1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus MB45 Moisture Analyzer. The contents of this manual is contained in five chapters.

Chapter 1 Introduction  - Contains information regarding service facilities, tools and test equipment, measuring masses, and specifications.

Chapter 2 Operation  - Contains information on the control functions of the Moisture Analyzer. Chapter 3 Troubleshooting  - Contains a diagnosis/diagnostics chart and error code table. Chapter 4 Maintenance Procedures - Contains preventive maintenance procedures, performance tests and adjustments, disassembly/replacement procedures, and calibration procedures.

Chapter 5 Drawings and Parts Lists   - Contains exploded views of all assemblies identifying serviceable components with parts lists. Before servicing the Moisture Analyzer, you should be familiar with the Instruction Manual which is packed with every unit.

1.2 SERVICE FACILITIES To service the Ohaus MB45 Moisture Analyzer, the service area should meet the following requirements: DO NOT SERVICE the Moisture Analyzer: •

Next to open windows or doors causing drafts or rapid temperature changes.

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Near air conditioning or heat vents.

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Near vibrating, rotating or reciprocating equipment.

•

Near magnetic fields or equipment that generates magnetic fields.

•

On an unlevel work surface.

•

Allow sufficient space around the instrument for ease of operation and keep away from radiating heat sources.

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D     s    i      p    la     y   

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1-1

CHAPTER 1 INTRODUCTION 1.3 TOOLS AND TEST EQUIPMENT REQUIRED This section contains information on tools and supplies required to properly service the MB45 Moisture Analyzer. These items are listed as follows:

1.3.1 Special Tools None required.

1.3.2 Tools and Supplies 1.Digital Voltmeter (DVM) - Input impedance of at least 10 megohms in the 1 Volt dc position. 2.Standard electronics tool kit 3.Soldering iron (50 watt) and solder (rosin core solder, not acid core). 4.Solder remover. 5.Ohaus Temperture Calibration Kit P/N 11113857 6.Soft, lint-free cleaning cloth 7.Anti-static bags for PCBs 8.Anti-static wrist strap and mat

1.4 TEST MASS REQUIRED It is recommended that a ASTM Class 1 Tolerance mass be used. The mass required is 20 grams.

1.5 SPECIFICATIONS Complete specificatons for the MB45 Moisture Analyzer are listed in Table 1-1. When an MB45 has been serviced, it must meet the specifications listed in Table 1-1. Before servicing the Moisture Analyzer, determine what specifications are not met.

TABLE 1-1. SPECIFICATIONS Capacity Readability Heat Source Calibration Dimensions (DxWxH) (in/cm) Operating Temperature Range Power Requirements Weight (lb/kg) Shipping Weight (lb/kg)

45g 0.001g, .01% Halogen bulb - 120 V or 240 V External calibration mass-20g 14 x 7.5 x 7/ 35.5 x 19 x 17.8 10°C to 40°C 100V ac -127V ac or 230V ac - 240V ac, 50/60Hz 9.8 / 4.5 14.1 / 6.4

1.5.1 Admissible Ambient Conditions Temperature range: Atmospheric humidity: Voltage fluctuations: Installation category: Pollution degree: Power load: Current consumption: Power supply voltage: Power line fuse:

Use only in closed rooms 5 ºC to 40 ºC 80% rh @ to 30 ºC –15% +10% II 2 Max. 450 W during drying process 4 A or 2 A, according to the heating element 100 V – 120 V or 200 V – 240 V, 50/60 Hz (the voltage is given by the heating element) 1 piece, 5 x 20 mm, T6,3 H 250 V

1-2

CHAPTER 2 OPERATION 2.1 MENU STRUCTURE This chapter contains menu structure, control swich operation and display adjustments. For complete operation, refer to the Instruction manual supplied with the unit. The menu structure is illustrated in the table below.

TABLE 2-1. MENU STRUCTURE TEST MENU

SETUP

Test Library

 Setup

Edit Test

Lockout Weight Calibration

01 Load Test Edit Test Delete Test

Temperature Calibration Language English, Deutsch, Espaniol, Francais, Italiano Beeper

02 Load Test Edit Test Delete Test

Low, High, Off Time-Date Format

• •

MM/DD/YR, DD/MM/YR Set Date

50 Load Test Edit Test Delete Test

AM, PM RS232 Baud Rate 1200, 2400, 4800, 9600, 19,200 Parity

Standard Fast Ramp Step Dry Temp: Switch Off: Timed- Switch Off Manual-Use Start/Stop

• •

Time format 12HR, 24HR Set Time

Test Parameters Test ID: Profile:

AFREE - Wt loss/time A90 -