Advanced Instruments 3250

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Osmometer Model 3250 User’s Guide

5. Reconnect the power cord and switch the power switch to the on

position. The instrument should start up as normal.

Power Switch

Fuse Holder

Figure 6: Fuse Replacement

Main Page

Copyright2
Hot-Line ™ Service2
Table of Contents3
Safe Use7
Symbol Conventions7
General Cautions8
FCC Requirements9
Supplies, Parts and Accessories10
Calibrators and Standards12
Foreword14
Intended Use14
Principles of Freezing-Point Osmometry15
Instrumentation16
Freezing-Point Thermodynamics16
Definitions18
Installation and Setup20
Step 1 - Find a Location for the Instrument20
Step 2 - Obtain Additional Items20
Step 3 - Unpack the Instrument21
Step 4 - Install the Heat Transfer Fluid22
Step 5 - Load Printer Paper (Figure 1)23
Step 6 - Power up the Instrument25
Step 7 - Prime the Heat Transfer Fluid Pump25
Step 8 - Run a Diagnostic Test27
Step 9 - Set Date and Time27
Step 10 - Set Language Preference27
Step 11 - Check Initial Factory Calibration28
Step 12 - Proceed to Chapter 228
Instrument Operation29
Hazardous Material Cautions29
Function of Major Components30
Operating Head (Figure 3, Item 1)30
Freezing Chamber (Figure 3, Item 8)30
Measurement and Control Circuits (Inside)31
Electronic Circuits (Inside)31
Display Panel (Figure 3, Item 4)31
Keypad (Figure 3, Item 4)32
Printer (Figure 3, Item 9)33
Supervisor/Operator Keyswitch (Figure 5)33
Power Module (Figure 5)34
Port (Figure 5)34
Barcode Port (Figure 5)34
Sample Preparation35
Sample Handling35
Repeatability Tips36
Verifying Calibration Daily37
Sample Test Procedure38
Sample Test Errors41
Changing Operating Settings42
Select Setup Item43
Set Block bin44
Set Sample bin44
Dis/Enable I.D45
Set Stir Amplitude45
Set Date/Time46
Dis/Enable Beeper46
Set Serial Rate47
Dis/Enable Xon/Xoff47
Serial Number47
Select Language48
Product/Test48
Data Capture48
Assistance48
Set "Buzz" Amplitude48
Set "Buzz" Point49
Select Range50
Zero Calibration51
Using the RS-232 Port51
Standards and Quality Control52
Repeatability and Accuracy52
Standards and Controls52
Maintenance of Standards53
Quality Control Implementation53
Calibration55
Calibration Procedure55
Calibration Notes57
Troubleshooting and Service58
Service and Maintenance Cautions58
Obtaining Service60
To Return an Instrument for Repair or Replacement61
Routine Maintenance62
Shutdown and Storage62
Troubleshooting Checks63
Internal Diagnostic Tests64
Statistics65
Recall Results66
A/D Tests66
Stir/Freeze Test68
Probe bin Test68
Display/Print Test70
Beeper Test70
Keypad Test70
Head Up/Down Test71
Event Record71
Fuse Replacement71
Sample Probe Checks and Replacement73
Mandrel, Probe, and Stir/Freeze Wire Alignment77
Alignment Using the Alignment Tool77
Alternate Method-Using a Sample Tube Containing 0.2 Ml of Water79
Stir/Freeze Amplitude Adjustment80
Troubleshooting Table83
Product Specifications90
Regulatory Notices93
Warranty and Warranty Duties97
Supplemental RS-232 Information101
Symbol Definitions104
Product Disposal and Recycling107
Service Log109

Advanced Instruments 3250 - Page 72

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