OHAUS STARTER 5000, Service Manual

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TABLE OF CONTENTS
ST5000 Bench Top pH Meter
Service Manual i Ohaus Corporation www.ohaus.com
CHAPTER 1 GETTING STARTED
Page No.
1 Introduction ..............................................................................................................1-1
1.1 Service Facilities ......................................................................................................1-1
1.2 Tools and Test Equipment Required ........................................................................1-2
1.2.1 Standard Tools and Test Equipment .................................................................1-2
1.4 Specifications ...........................................................................................................1-3
1.5 Compliances ............................................................................................................1-5
1.6 Buffer Groups ...........................................................................................................1-6
1.7 Controls ...................................................................................................................1-8
1.7.2 Icons.....................................................................................................................1-9
1.7.3 Sensor Condition ID .............................................................................................1-9
CHAPTER 2 DIAGNOSIS
2. Diagnosis .................................................................................................................2-1
2.1 Equipment Setup and Examination ..........................................................................2-1
2.2 Preliminary Checks ..................................................................................................2-1
2.3 Troubleshooting Tables ............................................................................................2-1
2.4 Proper Connection of Electrode with Meter ..............................................................2-3
2.5 pH Electrodes Preparation Before Calibration or Measurement ...............................2-3
2.6 Storage the pH Electrode .........................................................................................2-3
2.7 Diaphragm Contamination Issue ..............................................................................2-4
2.8 Reconditioning of the Dry Glass Membrane .............................................................2-4
2.9 Lifetime of an Electrode ...........................................................................................2-4
2.10 Symptoms for an Aged Electrode .............................................................................2-5
CHAPTER 3 PREVENTIVE MAINTENANCE
3. Preventive Maintenance ...........................................................................................3-1
3.1 Service Strategy .......................................................................................................3-1
3.2 Opening the Meter ...................................................................................................3-1
3.3 Separating the Top and Bottom Housing ..................................................................3-1
3.4 Removing the Main PCBA ........................................................................................3-3
3.5 Removing the LCD Touch Panel ..............................................................................3-4
3.6 Removing the Protective Rubber Seal......................................................................3-5
CHAPTER 4 DRAWINGS AND PART LISTS
4 Drawings and Part Lists ...........................................................................................4-1
APPENDIX A ST5000 SERVICE MODE
A Service Mode .......................................................................................................... A-1
A.1 Service Mode .......................................................................................................... A-1
A.2 Entering to Service Mode ........................................................................................ A-1
A.3 Service Password ................................................................................................... A-2
A.4 Options In Service Mode ......................................................................................... A-3