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OHAUS MB45 Instruction Manual

Moisture analyzer
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MB45 Moisture Analyzer

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  • Page 1 Instruction Manual MB45 Moisture Analyzer...
  • Page 2 Leerseite...
  • Page 3 Ohaus Corporation, USA, was examined and evaluated in 1994 by the Bureau Veritas Quality International, BVQI, and was awarded ISO 9001 registration. This certifies that Ohaus Corporation, USA, has a quality system that conforms with the international standards for quality management and quality assurance (ISO 9000 series). Repeat audits are carried out by BVQI at intervals to check that the quality system is operated in the proper manner.

  • Page 5: Table Of Contents

    Contents Contents OVERVIEW OF CONTROLS ......................... 8 GETTING TO KNOW YOUR MOISTURE ANALYZER ................. 9 Introduction ............................9 Overview of the Moisture Analyzer ....................... 9 What is a Moisture Analyzer ? ......................9 Safety is first ........................... 11 What you should know about these instructions ................. 13 INSTALLATION ..........................
  • Page 6 Contents OPERATING YOUR MOISTURE ANALYZER ..................35 The operating concept ........................35 Entering test ID ..........................35 Setting the drying profile ........................36 Setting the drying temperature ......................38 Selecting the switch-off criterion ......................39 Result ............................41 Custom units ..........................41 Target weight ..........................
  • Page 7 Contents 10.6 Accessories ............................ 66 10.7 Specifications..........................67 APPENDIX - APPLICATION EXAMPLES ....................68...

  • Page 8: Overview Of Controls

    Overview Overview of controls On/Off MB45 Test Menu Display Setup Enter Print START/STOP TARE Designation Function Turns ON/OFF display and fan. ON returns with last screen. (All modes) Test Menu button When pressed, selects Test Library screen. Display button When pressed, will return to the current test or cycles through several display screens (run mode).

  • Page 9: Getting To Know Your Moisture Analyzer

    1.1 Introduction Thank you for deciding to purchase a MB45 Halogen Moisture Analyzer from Ohaus. Behind your instrument stands OHAUS, a leading manufacturer of precision Moisture Analyzers, Balances, Scales and Indicators. An Aftermarket Department with trained instrument technicians is dedicated to provide you with the fastest service possible in the event your instrument requires servicing.
  • Page 10 GLP (Good Laboratory Practices) and SOP (Standard Operating Procedure). We recommend the use of the OHAUS AS-142 Printer. Your Moisture Analyzer has a CE declaration of conformity and OHAUS is registered to ISO 9001 - Quality Management System.

  • Page 11: Safety Is First

    Section 1 - Getting to know your Moisture Analyzer 1.4 Safety is first Your Moisture Analyzer employs state of the art technology and meets the latest demands regarding instrument safety. Improper operation can endanger personnel and can cause property damage. For safe and dependable operation, please comply with the following instructions: —...
  • Page 12 — Please comply with all notes and instructions in these operating instructions. Keep the instructions in a safe place where they are immediately at hand if any points are unclear. If you lose these instructions, please contact your OHAUS dealer for an immediate re- placement.

  • Page 13: What You Should Know About These Instructions

    Section 1 - Getting to know your Moisture Analyzer 1.5 What you should know about these instructions These instructions guide you step by step through the operation of your Moisture Analyzer. Section 2 provides detailed installation instructions. Section 3 allows you to perform a simple measurement. Section 4 explains the menu operation.

  • Page 14: Installation

    — 1 Warranty card Remove packing material from the instrument. Check the instrument for transport damage. Immediately inform your Ohaus dealer if you have complaints or parts are missing. Store all parts of the packaging. This packaging guarantees the best possible protection for the transport of your...

  • Page 15: Selecting The Location

    Section 2 - Installation 2.2 Selecting the location The Moisture Analyzer should always be used in an environment which is free from excessive air currents, corrosives, vibration, and temperature or humidity extremes. These factors will affect displayed weight readings. DO NOT install the Moisture Analyzer: •...

  • Page 16: Leveling The Moisture Analyzer

    Check to ensure the voltage identification label on the Moisture Analyzer matches your local line voltage. If this is not the case, do not connect the Moisture Analyzer to the power supply, contact your responsible OHAUS dealer. The halogen dryer unit is designed to operate at a specific line voltage (120 V ac or 240 V ac).

  • Page 17: Switching The Moisture Analyzer On Or Off

    Section 2 - Installation Connect the power cord supplied to the three pin connector located at the rear of the Moisture Analyzer and to a power source. The Moisture Analyzer becomes operational as soon as power is applied. The display will remain off until the On/Off button is pressed.

  • Page 18: Making A Simple Measurement

    Making a simple measurement - Section 3 3. Making a simple measurement With your Moisture Analyzer powered on, you are ready to operate for the first time and perform a simple measur- ment. For this simple test, you will enter the Test Menu and enable the test. By doing this test, you will become familiar with the instrument and the various displays.
  • Page 19 Section 3 - Making a simple measurement Place the specimen sample in the sample pan (glass fiber pad). Press the Tare button. This sets the Moisture Analyzer to zero. A new display now appears with instructions. TARE Wet the specimen sample with a 0.5 to 1 gram of water. TEST ID: -DEFAULT- TEMP / TIME: 100°C / 10:00...
  • Page 20 Making a simple measurement - Section 3 Drying and measurement TEST ID: -DEFAULT- TEMP / TIME: 100°C / 10:00 You are now able to follow the progress of the drying cycle on the display. INITIAL WT: 0.930 G This first display comes up automatically when the test was started. 70°C 4.04 00:20...
  • Page 21 Section 3 - Making a simple measurement Carefully remove the sample pan handler from the drying area. Warning: As the pan and sample may still be hot, you should let these cool down before removing the pan from the pan handler! To remove the sample pan from the pan handler, lift the pan slightly from below and pull it sideways out of the pan handler (if you no longer need the sample and pan, you can simply tilt the pan handler until the pan slides...

  • Page 22: The Menus

    The menu - Section 4 4. The menus 4.1 What are the menus? There are two sets of menus used in the Moisture Analyzer. One is the Setup menu which is activated by the Setup button. This menu permits calibration, adding custom units, language selection, beeper volume settings, time and date format, communication settings and print criteria.

  • Page 23: Menu Operation

    Section 4 - The menu 4.2 Menu operation In this section you will learn how to work with the menus. Information regarding the individual menu options and available settings can be found in the following sections. How to select the test menu Test Menu Pressing the Test Menu button accesses the Test Library menu.
  • Page 24 The menu - Section 4 How to enter alpha numeric data and make selections Certain menu options can have names or numerical entries made. When prompted to enter information, use the arrow buttons as follows: Press the arrow buttons to scroll through numbers or alphabet and to highlight an item in a menu.

  • Page 25: Analyzer Setup

    Section 5 - Analyzer setup 5. Analyzer setup The Analyzer Setup menu is activated by pressing the Setup button. The menu contains: lockout, weight and tempera- ture calibration, language selection, beeper volume settings, time and date format, communication settings, print criteria, display contrast and brightness settings, and factory reset.

  • Page 26: Weight Calibration

    Analyzer setup - Section 5 5.2 Weight calibration The Moisture Analyzer can be span calibrated with an external mass of 20 grams. Calibration of the Moisture Analyzer balance is not absolutely necessary for a correct moisture determination as the measurement is relative. The balance determines the weight of the sample before and after drying and the moisture is calculated on the basis of the ratio between wet and dry weights.

  • Page 27: Temperature Calibration

    Section 5 - Analyzer setup 5.3 Temperature calibration You must have a temperature calibration kit to perform this procedure. If the Moisture Analyzer has been recently used, allow at least 30 minutes before performing calibration. Note: The temperature calibration kit is available as optional equipment. ANALYZER SETUP LOCK OUT WEIGHT CAL...

  • Page 28: Language Setting

    Analyzer setup - Section 5 5.4 Language setting For convienence, the Moisture Analyzer is equipped with five languages available on all displays. This procedure permits the selection of any one language. Press the Setup button. Using the arrow buttons, select LANGUAGE. ANALYZER SETUP Press the Enter button.
  • Page 29 Section 5 - Analyzer setup Press the Setup button. Using the arrow buttons, select TIME-DATE. ANALYZER SETUP Press the Enter button. LOCK OUT WEIGHT CAL TEMP CAL LANGUAGE BEEPER TIME-DATE Format TIME - DATE FORMAT: MM/DD/YR FORMAT is highlighted. Select either MM/DD/YR or DD.MM.YR using the up/ SET DATE: 12/20/01 down arrow buttons.

  • Page 30: Rs232 Settings

    Analyzer setup - Section 5 5.7 RS232 settings Your Moisture Analyzer is equipped with a bidirectional RS232 compatible interface for communication with printers and computers. When the Moisture Analyzer is connected directly to a printer, displayed data can be output at any time by simply pressing the Print button.
  • Page 31 Section 5 - Analyzer setup Setting handshake RS232 BAUD RATE: 9600 Press the right arrow button to advance to HANDSHAKE. Using the up/down PARITY: NONE arrow buttons, select the desired handshake of NONE, X ON-X OFF, or RTS- DATA BITS: STOP BITS: CTS.

  • Page 32: Setting Print And Glp Printing On Or Off

    Analyzer setup - Section 5 5.8 Setting print and GLP printing on or off This menu permits setting print data and GLP printing data on or off. To set the printing functions, proceed as follows: ANALYZER SETUP Press the Setup button. Using the down arrow button, scroll to PRINT. Press the Enter button.

  • Page 33: Adjusting Display Contrast And Brightness

    Section 5- Analyzer setup 5.9 Adjusting display contrast and brightness This menu permits adjusting the contrast and brightness levels on the display screen. To change the levels, proceed as follows: ANALYZER SETUP Press the Setup button. Using the down arrow button, scroll to DISPLAY. Press the Enter button.

  • Page 34: Factory Reset

    Analyzer setup - Section 5 5.10 Factory reset This menu permits resetting the Moisture Analyzer to factory settings. All data accumulated in the library will not be lost if the reset is set ON. The table below indicates the factory settings. To reset the Moisture Analyzer, proceed as follows: Factory reset ANALYZER SETUP...

  • Page 35: Operating Your Moisture Analyzer

    Section 6 - Operating your Moisture Analyzer 6. Operating your Moisture Analyzer This section contains information on the use of the Test Menu which will enable you to set the actual drying param- eters such as Profile, Switch-Off, Display, Print Intervals, Target Weight and the use of the library. 6.1 The operating concept You have already set the Moisture Analyzer setup in Section 5 and have tried the simple moisture determination in Section 3.

  • Page 36: Setting The Drying Profile

    Operating your Moisture Analyzer - Section 6 6.3 Setting the drying profile The drying profile contains four settings, Standard, Fast, Ramp and Step. Section 6, paragraph 6.4 describes each of the drying profiles. Review the profile descriptions. Depending upon the sample material to be analyzed, select the appropriate profile and proceed as follows: Standard profile TEST PARAMETERS...
  • Page 37 Section 6 - Operating your Moisture Analyzer Ramp profile TEST PARAMETERS For this temperature program, the temperature and time elapsed between the TEST ID: -DEFAULT- PROFILE: STANDARD start of drying and the attainment of the final temperature is set. DRY TEMP: 180C SWITCH OFF: AUTO 60 Using the arrow buttons, scroll to PROFILE and press the Enter button.

  • Page 38: Setting The Drying Temperature

    Operating your Moisture Analyzer - Section 6 For STEP 1, using the arrow buttons, define the temperature. Using the STEP PROFILE arrow buttons, scroll to time. STEP 1: 5 MIN Using the arrow buttons, define the time. STEP 2: 100 C 5 MIN FINAL: 130 C...

  • Page 39: Selecting The Switch-Off Criterion

    Section 6 - Operating your Moisture Analyzer 6.5 Selecting the switch-off criterion This menu offers you different switch-off criterion. Switch-off criterion defines when the instrument should end the drying. Switch-off criterion eliminates checking your watch or clock and stopping the drying manually. Review the list below and select one criterion that suits your purpose.
  • Page 40 Operating your Moisture Analyzer - Section 6 Auto switch-off The switch-off criterion is based on a weight loss per unit of time. As soon as the mean weight loss is less than a preset value during a specified time, the instrument considers drying as complete and automatically discontinues the measurement process.

  • Page 41: Result

    Section 6 - Operating your Moisture Analyzer Using the arrow buttons, scroll to MG, now enter the weight loss (1 mg to AUTO FREE 10 mg). SWITCH OFF AT LESS THAN MG IN 60 SECONDS EXIT WITHOUT SAVING Using the arrow buttons, enter the time (10 seconds to 120 seconds). AUTO FREE Press the Enter button.
  • Page 42 Operating your Moisture Analyzer - Section 6 SCIENTIFIC NOTATION E X P O N E N T S N u m b e r B e t w e e n Moves decimal point 3 places to the left. C o n v . 0.1 and P o w e r M a n - F a c t o r...
  • Page 43 Section 6 - Operating your Moisture Analyzer Custom unit TEST SETUP TEST ID: With CUSTOM highlighted, press the Enter button. PROFILE: DRY TEMP: SWITCH OFF: RESULT: CUSTOM CUSTOM: 1.00000 Factor CUSTOM UNIT FACTOR 1.0 0 0 0 0 Using the arrow buttons, enter the factor number. This can be a number EXPONENT between 0.1 and 1.999999.

  • Page 44: Target Weight

    Operating your Moisture Analyzer - Section 6 6.8 Target weight Target weight is used when previous samples have been tested and the target weight is known. Target weight is a reminder to use a consistant sample size. Using the arrow buttons, scroll to TARG. WGT and press the Enter button. TEST PARAMETERS DRY TEMP: 125 C...

  • Page 45: Saving Test Setup

    Section 6 - Operating your Moisture Analyzer 6.10 Saving test setup Saving test setup saves all of the test parameters you have entered for the sample undergoing measurement. You have the option of saving or not saving the data. When saved, the test parameters are stored in the Library. If you want to exit without saving, see paragraph 6.11.
  • Page 46 Operating your Moisture Analyzer - Section 6 Follow the instructions on the lower left side of the screen. Place the empty sample pan in the pan handler (this is possible without tilting the sample pan if you insert this in the pan handler from the side directly below the round flange).
  • Page 47 Section 6 - Operating your Moisture Analyzer Close the cover. Starting the test START/STOP Press the Start/Stop button. The Moisture Analyzer starts the drying and measurement process. All of the settings made in the Test Menu are now put into effect. A running real time display illustrates the drying process which includes the TEST ID: 071000 B...

  • Page 48: Displaying Data During Run Mode

    Operating your Moisture Analyzer - Section 6 6.13 Displaying data during run mode or after completion To display the various screens, press the Display button repeatedly. TEST ID: 071000 B TEST ID: 071000 B TEST ID: 071000 B TEMP / TIME: 130°C / AFREE. TEMP / TIME: 130°C / AFREE TEMP / TIME: 130°C / AFREE INITIAL WT:...

  • Page 49: Using The Library

    Section 7 - Using the library 7. Using the library The library holds up to 50 tests. Each test consists of a test name and various analyzer settings, which may be stored, recalled and edited. Each time the Moisture Analyzer is set up to run a new test, the name of the test and all parameters are automatically stored in the library.

  • Page 50: How To Obtain The Best Results

    Your instrument performs measurements based on the thermogravimetric principle, i.e. the moisture is determined from the weight loss of a sample dried by heating. The Ohaus Moisture Analyzer comprises two instruments: a precision balance and a dryer unit. In contrast to other thermogravimetric methods (drying oven, infrared, microwave), the Halogen Moisture Analyzer operates with a halogen dryer unit.

  • Page 51: Sampling And Sample Preparation

    Section 8 - How to obtain the best results 8.2 Sampling and sample preparation Characteristics, preparation and size of the sample are all important contributing factors in increasing speed and the quality of the measurement process. Sampling and the sample preparation have a great influence on the reproducibility of the measured results. It is also important that the sample being investigated is a representative part of the total amount of the sample under test.
  • Page 52 How to obtain the best results - Section 8 Use of quartz sand To ensure an optimum drying process, samples should always have as large an area as possible. Results of sub- stances which form crusts (e.g. glucose syrup) or pasty substances (e.g. butter) can be considerably improved by mixing with quartz sand.
  • Page 53 Treating the sample during drying Occasionally, following recording of the initial weight of the sample and before the actual drying, the test substance is subjected to further treatment. The halogen Moisture Analyzer from OHAUS offers this possibility in the “manual” operating mode.

  • Page 54: Selection Of The Drying Temperature

    How to obtain the best results - Section 8 Influence of the sample weight on the repeatability of the results Sample weight influences the repeatability of the Moisture Analyzer. The repeatability always becomes worse with decreasing sample weight. The relation between sample weight and repeatability is shown in the following table: Sample weight Repeatability 0.5g...

  • Page 55: Selection Of The Drying Program

    Section 8 - How to obtain the best results The following procedure is suggested for selecting the temperature. — Estimate moisture content of the sample. — Determine the decomposition temperature of the sample by experiments. — Compare the measurement results with the reference method if one exists. —...
  • Page 56 How to obtain the best results - Section 8 Ramp drying Ramp drying is selected if substances are not Ramp drying stable on exposure to the full heating power of the halogen radiator at the start. In ramp drying, sensitive samples are prevented from decomposition by the gentle heating.

  • Page 57: Selection Of The Drying Time

    Section 8 - How to obtain the best results 8.5 Selection of the drying time The Halogen Moisture Analyzer offers two different types of switch-off criteria. A switch-off criterion is understood to mean the condition which must be met for the Halogen Moisture Analyzer to switch off automatically and end the drying.

  • Page 58: Analysis Of The Drying Profile

    How to obtain the best results - Section 8 8.6 Analysis of the drying profile In the first type, the drying profile is asymptotic. The amount of moisture lost assumes a constant value and no longer changes after long drying times. With this drying profile, repeatable determinations of the moisture content are always simple.

  • Page 59: Printing Test Data

    Samples of weight calibration, temperature calibration and test data (GLP on and GLP off) are shown as follows: Temperature calibration printout Weight calibration printout WEIGHT CALIBRATION #12 TEMPERATURE CAL#12 DATE: 12.19.01 DATE: 12.19.01 TIME: 11:20 TIME: 11:25 OHAUS MB45 OHAUS MB45 S/N: 1234567 S/N: 1234567 REFERENCE WT: ....TEMP REFERENCE ID..WEIGHT: 20.000 G...
  • Page 60 Test data printout Statistics printout GLP ON, Interval at 30 seconds. Pressing Print will add additional lines to data. MOISTURE DETERMINATION STATISTICS OHAUS MB45 SN 1234567 TEST ID: 120201 A TEST ID: 120201 A Sample N : Switchoff Mode. AUTO 60 Mean X : 87.01 %MC...

  • Page 61: Rs232 Command Table

    Section 9 - Printing 9.1 RS232 Command table Output Formats Data output can be initiated in one of three ways: 1) By pressing Print button; 2) Using the Print Interval feature; 3) Sending a print command (“P”) from a computer. RS232 Commands All communication is accomplished using standard ASCII format.

  • Page 62: Care And Maintenance

    Care and maintenance - Section 10 10. Care and maintenance In this section, you will learn how to keep your Moisture Analyzer in good condition and how to replace expendable parts. 10.1 Cleaning interior/exterior components To continue to obtain precise measurements, it is advisable to clean the interior components at regular intervals. Please note the following instructions for cleaning your instrument.
  • Page 63 Section 10 - Care and maintenance Cleaning temperature sensor and protective glass With the cover open, check the protective glass and the temperature sensor for debris which could impede the operation. If the glass appears dirty, clean PROTECTIVE GLASS the surface facing the compartment using a commercial glass cleaner. If the sensor is dirty, clean using a mild cleaning agent.

  • Page 64: Replacing Power Line Fuse

    Care and maintenance - Section 10 10.2 Replacing power line fuse If the instrument display fails to light after switching it on, check the power outlet first. If power is available, and the instrument fails to operate, the power fuse may be open (blown). Disconnect the instrument from the power supply before changing the fuse.

  • Page 65: Troubleshooting

    The dryer unit has a thermal overload protection (bimetallic sensor) which switches off the heating element. In such a case, contact your OHAUS dealer. Problem: The measurements are not repeatable.

  • Page 66: Error Detection

    If the Troubleshooting section does not resolve or describe your problem, you will need to contact an authorized Ohaus Service Agent. For Service assistance in the United States, please call Aftermarket, Ohaus Corporation toll-free at (800) 526-0659. An Ohaus Product Service Specialist will be available to help you.
  • Page 67 Section 10 - Care and maintenance 10.7 Specifications MODEL MB45 Capacity Readability 0.001g, .01% Results Moisture (%), dry content (%), Wt (g), Wt (custom), regain, % Temp. Settings 50°C to 200°C Increments 1°C Drying Programs Standard, fast, ramp, step Switch-off Criteria...
  • Page 68 APPLICATION DISCLAIMER: — Moisture determination applications must be optimized and validated by the user according to local regulations. Application specific data provided by Ohaus is provided for reference purposes only. Ohaus waives all liability for applications based on this data.
  • Page 69 Appendix A1 - Application examples Comments on the table Honey Wheat flour Melted in a closed vessel at 60°C. Direct weighing-in. Dried between 2 glass fiber pads. No visible coloration due to decomposition. No visible coloration due to decomposition. Dried vegetables Water-soluble coffee Beans milled in grinder.
  • Page 70 Ohaus products are warranted against defects in materials and workmanship from the date of delivery through the duration of the warranty period. During the warranty period Ohaus will repair, or, at its option, replace any component(s) that proves to be defective at no charge, provided that the product is returned, freight prepaid, to Ohaus.
  • Page 71 Leerseite...
  • Page 72 Ohaus Corporation 19A Chapin Road, P.O. Box 2033 Pine Brook, NJ 07058-2033, USA Tel: (973) 377-9000, Fax: (973) 593-0359 With offices worldwide. www.ohaus.com © Ohaus Corporation 2001, all rights reserved. 80250891C PRINTED IN SWITZERLAND...

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