Table of Contents
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Contents
1.1
Useful tips on the Operating Instructions ............................... 77
1.2
Declaration of conformity ....................................................... 79
2.1
Representations and symbols................................................ 80
2.2
Safety instructions ................................................................. 80
3.1
Unpacking.............................................................................. 82
3.2
Transport, storage ................................................................. 83
3.2.1
3.2.2
3.3
Inspection and assembly ....................................................... 84
3.4
Choosing a suitable location .................................................. 85
3.5
Connecting it to the mains ..................................................... 86
3.6
Safety measures.................................................................... 87
3.7
Levelling................................................................................. 87
3.8
Weight calibration .................................................................. 88
3.9
First measurement................................................................. 89
4.1
Panel Sheet ........................................................................... 93
4.2
Menu control operation principle............................................ 94
4.3
Setting and saving the configuration...................................... 96
4.4
Instrument configuration ........................................................ 96
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.4.6
4.4.7
4.4.8
4.4.9
4.4.10
4.4.11
4.5
Application menu operation ................................................. 106
4.5.1
4.5.2
4.5.2.1
4.5.2.2
75
KERN MRS120-3
Version 1.0 01/2004
Operating Instructions
Moisture Analyzer
................................................................................ 77
................................................................................ 80
................................................................................ 82
Transport and shipping.................................................83
Storage.........................................................................83
................................................................................ 93
Activating the configuration menu ................................97
Language function........................................................97
Configuring the report printout......................................98
Configuring the application menu ...............................100
Balance calibration .....................................................100
Temperature calibration .............................................100
Interface functions ......................................................101
Date and time.............................................................101
Password protection...................................................102
Anti-theft encoding .....................................................104
Key tone .....................................................................105
Activating the application menu..................................107
Methods .....................................................................107
Saving a method.................................................... 108
Loading a method.................................................. 109
MRS-BA-defsi-0410
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Summary of Contents for KERN MRS120-3
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Page 1: Table Of Contents
KERN MRS120-3 Version 1.0 01/2004 Operating Instructions Moisture Analyzer Contents 1.Introduction ................77 Useful tips on the Operating Instructions ....... 77 Declaration of conformity ............79 2 Safety ................80 Representations and symbols..........80 Safety instructions ..............80 3 Set up ................ - Page 2 4.5.2.3 Deleting a method ..........109 4.5.2.4 Setting method name ............. 110 4.5.3 Starting weight ............110 4.5.4 Units ................110 4.5.5 Print rate..............112 4.5.6 Standby temperature..........112 4.5.7 Autostart..............112 Special operating keys............113 4.6.1 The tare key ...............113 4.6.2 The print key ..............114 4.6.3 The change key............117 4.6.4...
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Page 3: Introduction
1. Introduction The MRS 120-3 moisture analyzer is simple and functional to operate. It is used as a quick and reliable means of determining the moisture content in powders and liquids by the thermogravimetric principle. The key features of the MRS 120-3: •... - Page 4 • Display shows List of operating steps • If you press the « Sprache Deutsch » key repeatedly, “SPRACHE DEUTSCH”, “LANGUAGE ENGLISH” or Langue francaise “LANGUE FRANCAISE” appears in the display. language english – See section 2 "Safety" for the symbols to indicate risks and tips. MRS-BA-defsi-0410...
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Page 5: Declaration Of Conformity
Moisture Balance: KERN MRS120-3 Mark applied EU Directive Standards 73/23EEC Low voltage EN 61010 89/336EEC EMC EN 61326 Date: 02.03.2004 Signature: Gottl. KERN & Sohn GmbH Management Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149 MRS-BA-defsi-0410... -
Page 6: Safety
2 Safety Representations and symbols Important safety-related instructions are highlighted visually at the description of what to do: DANGER Warning of a possible danger which may lead to death or to serious injury. CAUTION Warning of a possible danger which may lead to minor injury or damage. - Page 7 If you spill any liquid onto the instrument, unplug it from the electrical supply immediately. Do not operate the moisture analyzer again until you have had it checked by a KERN service engineer. CAUTION Some of the parts, like the heating element and the viewing window, may become considerably hotter while it is in operation.
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Page 8: Set Up
Storage with minimal fluctuations in temperature (Cap.3.2.2 “ ”) • Read these Operating Instructions carefully before operating the balance, even if you have used KERN equipment before and pay particular attention to the safety instructions (Cap.2 “Safety”). MRS-BA-defsi-0410... -
Page 9: Transport, Storage
Transport, storage 3.2.1 Transport and shipping Your MRS 120-3 moisture analyzer is a precision instrument. Treat it with care. Avoid shaking it or subjecting it to any heavy jolts or vibrations during transport. Avoid serious temperature fluctuations and getting the instrument damp (condensation) during transport. -
Page 10: Inspection And Assembly
Inspection and assembly The moisture analyzer does not come fully assembled. Once you have unpacked all the parts, check that the delivery is complete and assemble the individual components in the order indicated below. Components delivered Components delivered MRS 120-3 moisture analyzer In-use cover for the display Mains cord 30 sample pans (4) -
Page 11: Choosing A Suitable Location
You can now place an aluminium pan (4) on the pan support. NOTE All the parts must be attached together without exerting undue force. Do not apply any force. If you have any problems, the KERN customer service will be happy to help. Choosing a suitable location... -
Page 12: Connecting It To The Mains
Connecting it to the mains Follow safety instructions when connecting the instrument to the mains: DANGER The instrument may only be operated using the original mains cord supplied. If the mains cord supplied is not long enough, only use an extension cord fitted with a protective earth conductor. -
Page 13: Safety Measures
Safety measures The safety class 1 instrument, the MRS 120-3, may only be plugged into a socket which has been installed in accordance with regulations and is fitted with a protective earth terminal. The safety effect may not be undone by using an extension lead without an earth wire. -
Page 14: Weight Calibration
Weight calibration Since the Earth's gravity is not the same everywhere, each balance must be adjusted to compensate for the gravity at each location, in accordance with the underlying physical weighing principle. This adjustment process, which is known as “calibration”, must be carried out on initial installation and then each time the instrument is moved to another location. -
Page 15: First Measurement
First measurement Once the MRS 120-3 moisture analyzer is successfully up and running, you can perform an initial measurement to familiarize yourself with the new instrument and to test it for any malfunctions. Switch the instrument on using the «ON/OFF» key. The instrument performs a self-diagnostics test to check the main functions. - Page 16 • Pour approx. 1.0 g of water into the weighing pan. • Close the hood The instrument is prepared for the first measurement. • Start the measurement by pressing the «START/STOP» key. The heating element heats up to 105°C, and the fan starts to cool. •...
- Page 17 • 93.27 The result appears in the measurement display in the unit 105°C 2.3MIN of measurement set. • The info line displays the heating mode used (standard), the current temperature (105°C) and the current duration of the measurement (2.3 min.). If the temperature is under 40°C, three dashes are displayed: "--- °C".
- Page 18 • Open the hood • Carefully remove the weighing pan, only gripping the sample holder by the handle. Caution! All the parts of the sample chamber are hot. Allow the weighing pan and holder to cool down before doing anything else with them. •...
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Page 19: Operation
4 Operation The MRS 120-3 moisture analyzer has two main menus: the configuration menu and the application menu. Instrument-specific parameters and the layout of the report printout are defined in the configuration menu. You can either work with the basic configuration programmed in the factory or define and save a user configuration which is adapted to suit your specific needs. -
Page 20: Menu Control Operation Principle
Menu control operation principle The configuration menu and the application menu each have a main path and up to two sub-paths in which the parameters for the different functions of the instrument are defined. », « », « » « »... - Page 21 NOTE The geometry of the menu tree diagram corresponds to the path configurations of the two main menus. In program operation mode, the key symbols highlighted in blue apply on the control panel. Key(s) Designation Function in weighing mode • Changes from the main menu path to the sub-paths and vice versa.
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Page 22: Setting And Saving The Configuration
Setting and saving the configuration – Press «ON/OFF» to switch the instrument on. – During the start-up process, keep the «TARE» and «MENU» keys pressed in until the configuration you require appears in the display, then let the keys go: "FACTORY CONFIG.": Load the factory configuration. -
Page 23: Activating The Configuration Menu
Representation conventions: • The settings programmed in the factory are depicted in bold. • In order to aid clarity, the only part of the menu tree shown in each function description is the part which relates to the function in question. Explanations on the menu functions are depicted in italics. -
Page 24: Configuring The Report Printout
4.4.3 Configuring the report printout The report printout can be configured in the "SET DATA PRINT" menu option. The options marked "ON" are contained in the report and are printed. The "MODE PC" function allows the measurement printout to be output in a format which the PC can support. - Page 25 Example of a report printout with all the available selection options. *********** KERN MRS 120-3 *********** Report title, only output in printer mode. ------------------------------------------------ Date 07.10.2002 Time 11:06:01 Date and time, if this is switched on. Name : MRS 120-3...
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Page 26: Configuring The Application Menu
4.4.4 Configuring the application menu • SET APP. MENU EDIT METHOD ON/OFF METHOD-ID ON/OFF TARGET WEIGHT ON/OFF UNIT ON/OFF PRINT RATE ON/OFF STANDBY TEMP. ON/OFF AUTOSTART ON/OFF The options activated under "SET APP. MENU" are enabled in the application menu and can be changed and set there (see chapter 4.5 "Application menu operation"). -
Page 27: Interface Functions
TIME [HH.MM.SS] and time FORMAT STANDARD/US NOTE If a power failure occurs, the timer keeps running. If this doesn't happen, this indicates that the instrument's backup battery has run out and has to be replaced by KERN Customer Service. MRS-BA-defsi-0410... -
Page 28: Password Protection
The password protection is deactivated in the factory settings. The preprogrammed password set in the factory is: 7 9 1 4 This password is the same for all KERN instruments and is always valid, at the same time as a password selected by the operator. - Page 29 Procedure for activating the password protection: • Activate the configuration menu PASSWORD _ _ _ _ • Keep pressing « » until • "PASSWORD----" appears. PASSWORD 0 0 0 • Press « ». The first digit in • the password "- - - -" starts •...
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Page 30: Anti-Theft Encoding
The anti-theft encoding is deactivated in the factory settings. The preprogrammed code set in the factory is: 8 9 3 7 This code is the same in all KERN instruments. Therefore, for security reasons enter your own code. Keep your own code in a safe place. -
Page 31: Key Tone
• THEFTCODE THEFTCODE –––– THEFT-PROTECTION ON/OFF Switch encoding on/off NEW CODE –––– Enter a new code In order to activate the anti-theft encoding, follow the same steps described for password protection. 4.4.11 Key tone • KEY TONE KEY TONE ON/OFF Switch key tone on and off If the key tone is switched on, a short audio signal is sounded each time a key is pressed. -
Page 32: Application Menu Operation
Application menu operation This section explains the structure of the application menu and its functions. The structure of the application menu is dynamic and can be Configuring defined in the configuration menu (see chapter 4.4.4 " the application menu ") If a menu option is disabled in the configuration menu, it is not contained in the current application menu. -
Page 33: Methods
4.5.1 Activating the application menu • Press «MENU» following the start-up process in order to get to the application menu. 4.5.2 Methods The MRS 120-3 supports the saving of five different methods. One method comprises the settings for the drying program and the starting weight help. -
Page 34: Saving A Method
4.5.2.1 Saving a method • STORE METHOD STORE METHOD Save a method Procedure for saving a method: • Set the drying parameters and the starting weight for the required method and enter a name for the method. • (see chapter 4.5.2 "Methods“) •... -
Page 35: Loading A Method
• Enter the new name for the Method TEST method using the « », « », « » and « » keys. • Press « ». The method is saved. The dryer switches to weighing mode. If all 5 memory slots are occupied, you won't be able to save a new method. -
Page 36: Mrs-Ba-Defsi
4.5.2.4 Setting method name • METHOD METHOD ttt... Enter the name for the method 4.5.3 Starting weight • SET TARGET WEIGHT WEIGHT CHECK ON/OFF Switch check on/off NOMINAL 5.000 g Enter nominal weight UPPER LIMIT 6.000 g Define upper limit LOWER LIMIT 4.000 g Define lower limit With the aid of the «TARGET WEIGHT», you can weigh the sample... - Page 37 Description/calculation of the units Explanation of the variables used • Moist weight (weight value at the start of the measurement) • Dry weight (weight value at the end of the measurement) Unit Calculation ⋅ 100 - 0% ---------- - 100% Dry mass in percent: MW DW –...
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Page 38: Print Rate
4.5.5 Print rate • PRINT RATE 1.0 MIN PRINT RATE Print rate interval The interval at which interim results are printed is set at "PRINT RATE". The print interval can be set in 0.1 min increments from 0.1 ... 10.0 min. 4.5.6 Standby temperature •... -
Page 39: Special Operating Keys
Special operating keys 4.6.1 The tare key – Ensure that there is no drying taking place, i.e. that the instrument is in weighing mode. • Activating taring – Press «TARE» briefly. – A taring procedure is performed. • Activating calibration –... -
Page 40: The Print Key
NOTE The special functions of the tare key are only active if they are switched on in the configuration menu. A calibration or a calibration test procedure can be interrupted by pressing «ON/OFF». This applies both to the balance and to the temperature. - Page 41 Status : Status printout for the settings. -------- Date 07.10.2002 Time 16:12:39 Instrument identification Name : MRS 120-3 Software : N50-0040 P00 Serialno : 3300-1 Print : Report printout settings Printformat : Date and Time : on Balance-ID : on Method-ID : on Counter...
- Page 42 Applications : Printout of the application settings and -------------- methods. Dryer setup : Current drying parameter settings Heat mode : Standard Temperature : 105 C Timer stop : off Time : 10.0 min Auto stop : 2/20 D/s Free : 1/20 D/s Autostart : off Standby Temp...
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Page 43: The Change Key
4.6.3 The change key • Changing units – If drying has already been performed or is under way, the unit of measurement displayed can be changed using the change key « ». Once a drying procedure is ended, the drying result can be displayed in all the available units until the start of a new drying sequence using the change key «... -
Page 44: Determining Moisture Levels
5 Determining moisture levels The MRS 120-3 moisture analyzer is used as a quick and reliable means of determining the moisture content in powders and liquids by the thermogravimetric process. Fundamental principles The term moisture does not just relate to water, it also encompasses all substances which evaporate when they are heated. -
Page 45: Adjusting To The Existing Measuring Process
5.1.1 Adjusting to the existing measuring process The MRS 120-3 moisture analyzer is frequently used in place of other drying techniques (like the drying oven) because it is easier to operate and offers shorter measuring times. Consequently, the conventional measuring process has to be adapted to the MRS 120-3 so that comparable results can be achieved. -
Page 46: Preventing Samples Being Encrusted
Liquids: • You are advised to use a fiber glass filter for liquids, pastes or slurry samples. The fiber glass filter offers the following advantages: – even distribution on account of the capillary effect – no formation of drops – quick evaporation due to the larger surface 5.2.1 Preventing samples being encrusted In order to avoid the sample becoming encrusted, solvent can also be added to the sample after the measurement has started. -
Page 47: Setting Drying Parameters
Setting drying parameters The drying parameter setting procedure is started with the four function keys under the display. Each of the four function keys starts the entry of the corresponding drying parameter. The parameters are entered or changed in the same way as the menu operation procedure ( except that only the current parameter can be changed each time. - Page 48 Boost drying The drying temperature is predefined by the user. During the selected time (0.1Min-99.9Min) of drying, the target temperature is exceeded by 40%. Once this time has elapsed, the temperature is adjusted down to the target temperature. The temperature is started up with a high heat output.
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Page 49: Temperature
This program is used for samples with a low moisture content in which there is a risk of combustion. 5.3.2 Temperature This function key is used to start the drying temperature input. The drying temperature can be entered in 1°C increments from 30°C ... -
Page 50: Switch-Off Criteria
5.3.4 Switch-off criteria This function key is used to start the definition of the switch-off criteria for the measurement. One firmly and 2 freely definable stop mode are availlable. There is also the automatic stop mode "ADAPTSTOP". – Digit / Time (selectable) –... -
Page 51: Application Table (Recommendations)
One digit is the smallest change in measurement that can be displayed by the moisture analyzer. In the MRS 120-3: 1 digit = 1 mg ADAPTSTOP Is a fully automatic stop mode which determines the switch-off time on the basis of the drying progress. Application table (recommendations) Preparation of the standard sample: Distribute the sample evenly on the aluminium tray. - Page 52 MATERIAL 76.5 10-15 Dry piece of apple 5-10 Moist apple Butter 16.3 Mustard 76.4 Ground coffee Cornflakes Yogurt 86.5 4.5-6.5 Powdered coffee 78.5 cream Cocoa powder Crisps Margarine Mayonnaise 56.5 Powdered milk Milk chocolate Red wine 97.4 15-20 Chocolate powder Sunflower oil 10-14 Instant soup...
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Page 53: Data Transfer
6 Data transfer The MRS 120-3 moisture analyzer is equipped with an RS232/V24 interface for data transfers to peripheral instruments. Before the data transfer, the RS232 interface must be matched with the one in the peripheral instrument in the instrument's configuration menu (see chapter 4.4.7"Interface functions"). -
Page 54: Connection Scheme
Blank (space) Prefix (+,–, space) Decimal point D0...D7 Digits U ... Unit (only if the weight is stable, otherwise no unit is sent) Carriage return Line feed NOTE Unused positions are filled with spaces. The decimal point DP can be between D0 and D7. Connection scheme –... -
Page 55: Remote Control Commands
• Pin configuration of the RJ45 socket MRS 120-3 RJ 45 Remark n.c. Not connected RS 232 out Out (V24) In (V24) Out (9 ... 16V) RS 232 in In (V24) Out (V24) EXTBUS In (5V, logic) Remote control commands Command Function Acknowledge n=0 off;... -
Page 56: Examples Of The Remote Control Of The Instr
Command Function SDTmmddyy Set date and time (Month, Day, Year, Hour, Minutes, hhmmss Seconds) T (ttt) Tare or set tare to a specific value ZERO Set instrument to 0 (if weight is stable and within the zero setting range) Rttt Adjusts the heating to the required temperature (30°C ... -
Page 57: Service
Do not operate the MRS 120-3 moisture analyzer again until you have had it checked by a KERN service engineer. The connection ports on the back of the instrument may not come into contact with liquids. -
Page 58: Replacing The Mains Fuse
115 volt variant: T 6.3 A, 115 V, 5x20 mm If the instrument still does not work after replacing the fuse, contact the KERN Service Center. DANGER Under no circumstances should you use other fuses or attempt to bridge the fuse. -
Page 59: Calibration
Calibration The calibration of the MRS 120-3 moisture analyzer is defined in the configuration menu (see chapter 3.8"Weight calibration" and chapter 4.4.5 “Balance calibration”). NOTE The balance calibration and the temperature calibration can be interrupted at any time by pressing «ON/OFF». 7.3.1 Calibrating the balance Possible types of balance calibration: –... - Page 60 • The display flashes. - - 50 • Once the display stops flashing,this indicates that the + 50 calibration has ended. External calibration with a freely definable weight "SET CALIBRATION MODE EXT.-DEF." must be set in the configuration menu (se chapter 4.4.5 “Balance calibration”) for external calibration with a freely definable weight.
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Page 61: Calibrating The Temperature
Calibration report printout Calibration Balance calibration report ------------ Date 16.10.2003 Time 12:51:36 Time of the calibration and instrument data Name : MRS 120-3 Software : N50-0000 P00 Serialno : 3300-1 Calibration o.k. Status of the calibration Operator Operator ID, if activated under Set Print Configuring Format (see chapter 4.4.3 the report printout... - Page 62 • The temperature value is transmitted to the instrument from the temperature adjustment set. • It is heated to 160°C. TEMP 100°C 20.00 MIN • The temperature value is transmitted to the instrument from the temperature adjustment set. • Once the temperature calibration has ended, the report is printed.
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Page 63: Software Update Via Internet
Error messages The instrument displays an error description in the info line. NOTE If an error occurs without any corresponding description in the info line, a KERN service engineer must be called Error message Cause • Starting value too small The sample weight is too small (<0.200 g). - Page 64 Fault Possible causes • Results of The instrument has not been correctly tared • weighing are The instrument has not been correctly levelled • clearly incorrect The calibration is no longer correct • Sharp temperature fluctuations occur • The weight The draft is too strong at the location of the display changes instrument...
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Page 65: Overview
8 Overview Technical data Heat source, heater type Halogen Weighing range [g] / Readability [g] 120 /0.001 Drying: Readability [%] 0.01 Reproducibility in approx. 1g [%] Reproducibility in approx. 10g [%] 0.02 Sample weight [g] 0.2 - 120 Result calculations: 100-0%, 0-100% ATRO 100-999%, ATRO 0-999%,... - Page 66 Anti-theft protection Code and mechanically Connection: Mains voltage 230V or 115V Can be switched by changing the unit of heat (may only be done by KERN Service) Mains frequency [Hz] 50 - 60 Power consumption [W] Dimensions: Instrument housing (WxHxD) [mm]...
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Page 67: Configuration Menu Tree
Configuration menu tree «MENU» Key is pressed during switch-on: • SET DATA PRINT SET PRINTFORMAT DATE AND TIME ON/OFF BALANCE-ID ON/OFF METHOD-ID ON/OFF COUNTER ON/OFF DRYER SETUP ON/OFF PRINT RATE ON/OFF OPERATOR-ID ON/OFF PRINT RATE 1.0 MIN OPERATOR ttt... MODE PRINTER MODE •... - Page 68 • SET INTERFACE BAUDRATE BAUDRATE BAUDRATE 1200 BAUDRATE 2400 BAUDRATE 4800 BAUDRATE 9600 BAUDRATE 19200 PARITY 7-EVEN-1STOP PARITY 7-ODD-1STOP PARITY 7-NO-2STOP PARITY 8-NO-1STOP HANDSHAKE HANDSHAKE XON-XOFF HANDSHAKE HARDWARE • SET DATE AND TIME DATE [DD.MM.YY] TIME [HH.MM.SS] FORMAT STANDARD/US • PASSWORD PASSWORD ––––...
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Page 69: Application Menu Tree
• CONTRAST CONTRAST • LANGUAGE LANGUAGE ENGLISH SPRACHE DEUTSCH LANGUE FRANCAISE 8.2.1 Application menu tree «MENU» Key is pressed during operation: • RECALL METHOD RECALL METHOD ttt... ttt... ttt... ttt... ttt... • STORE METHOD STORE METHOD • CLEAR METHOD CLEAR METHOD ttt... - Page 70 • UNIT UNIT 100-0% 0-100% ATRO 100-999% ATRO 0-999% G/KG RESIDUAL WEIGHT WEIGHT LOSS BALANCE WEIGHT • PRINT RATE PRINT RATE 1.0 MIN • STANDBY TEMP. STANDBY TEMP. ON/OFF TEMPERATURE 40°C • AUTOSTART AUTOSTART ON/OFF MRS-BA-defsi-0410...
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Page 71: Key Menus
8.2.2 Key menus Hold the appropriate key down until the required menu option appears in the info line. The options „PRINT“ and „TARE“ are not displayed. • Print key not displayed PRINT RESET COUNTER PRINT STATUS PRINT APPLICATIONS • Tare key not displayed TARE BALANCE CALIBRATION... -
Page 72: Setting Drying Parameters
8.2.3 Setting drying parameters • HEATING PROGRAM • HEAT MODE STANDARD BOOST • SOFT • DRYING • TEMPERATURE • TEMPERATURE 105°C • DRYING Time STOP TIME 10.0 MIN • TIMER STOP ON/OFF • STOPMODE AUTOSTOP Digit / Time • Percent / Time ADAPTSTOP 8.2.4 Setting and saving the configuration «MENU»...
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