Operating Instructions, Weigh Modules WMC
Contents
1. 6 Plug the terminal cable plug H into the appropriate jack on the back of the electronic unit and screw in to tighten Try to run the terminal cable as close as parallel as possible to the terminal holder 4 8 Connect the Unit to the Power Supply The electronic unit for your weigh module is delivered with an AC adapter and a power cord for your country The AC adapter is suitable for use with the following voltage range 100 240 VAC 50 60 Hz see General Data page 27 Check whether your local power supply falls within this range If it does not DO NOT connect the electronic unit or the AC adapter to your power supply and contact your local METTLER TOLEDO office Initial Startup of the Weigh Modules Connect the AC adapter A to the connector B on the back of the elec tronic unit and to your power supply Tighten the connector to ensure a good connection to the electronic unit Attention Be sure to lay the cables so that they cannot be damaged or get in your way while you re working Remember that the AC adapter may NOT come into contact with any liquids Once the weigh module has been connected to the power supply the weigh module will perform a self test and then it will be ready to oper ate 5 Configuring the Weigh Module Once the weigh modules have been installed they must be configured i e prepared for operation For weigh modules with a terminal connected nearly all configuration work can be per2. 3 The settling time is the time between when the object fo be weighed is placed on the scale and a stable sig nal is transmitted this assumes optimal ambient conditions and optimal parameter settings 8 3 Key to Types and List of Available Models The type designation allows you to clearly identify your weigh module The type designation can be found on the name plate for the weigh unit and the electronic unit WMC 1 Maximum load readability For example 25 20g 10 ug 15 10g 10 ug 24 20g 0 1 mg 2 Version S Single channel version O Weigh unit only E Electronic unit only 3 Connection H Horizontal cable exit 4 Customer specific version For example 01 Customer A 02 Customer B Note The type designation always refers to the configuration as originally shipped For example if a weigh module has a terminal added to it later the type designation printed on the name plate will no longer be correct In this case the terminal will check all weigh module components and use this information to generate a new type designation This designation can be queried directly at the terminal or by using a software command List of available models Model Part WMC25 SH 11149000 WMC15 SH 11149009 WMC24 SH 11149002 30 Technical Data 8 4 Dimensions 8 4 1 WMC weigh unit dimensional drawing with draft shield 20 9
3. Therefore keep the cover in a safe place Locate the bushing of the Weighing pan adapter C on the pin of the weighing pan support A Initial Startup of the Weigh Modules 11 12 Initial Startup of the Weigh Modules Put the standard weighing pan D onto the weighing pan adapter If you wish to use your own setup place it directly on the weighing pan adapter the standard weighing pan is not needed in this case Dimensional drawings of both weighing pans are found in Section Dimensions page 31 To ensure proper startup of the weigh module the preload must not exceed 80 of the weighing range The weighing range will hence be reduced by the amount of the preload weight If the entire weighing range is required the preload may not exceed 4 g starting from stan dard weighing pan e Weight of weighing pan adapter approx 0 2 g e Weight of standard weighing pan approx 1 1 g Note With high preload the adjusting weight must be chosen accordingly For adjusting purposes it is preferable to convert the weighing cell back fo its original state Note on overload protection The weigh units of the WMC weigh modules have overload protection The following limit values must not be exceeded e Vertical load 1kg static load e Lateral load 200g static load e Torsion 0 3 Nm Slide the draft shield E onto the weigh unit by evenly pressing down on two opposite corners until it engages with an audible
4. and prepare it for operation 4 1 Unpacking the Weigh Module The weigh unit and the electronic unit are each packed in separate cardboard boxes along with the associated hardware and appropriate mounting materials The boxes are labeled with their contents as follows Weighing module and Electronic Unit Both cardboard boxes are placed inside a large transport box The terminal must be ordered separately and consequently it is supplied separately Unpacking the electronic unit and terminal Remove the top foam cushion then remove the unit and the hardware Unpacking the weigh unit Remove the grey foam cushion Carefully remove the weigh unit from the cushion and place if smoothly on a level surface Note Keep all packaging in case you need to transport the module in the future the weigh module should only be transported in its original packaging 4 2 Scope of Delivery Please check the scope of delivery using the following table If any parts are missing or defective please report this fo your METTLER TOLEDO representative or the shipper immediately Weighing Module Box Parts WMC24 SH WMC15 SH WMC25 SH WMC weigh unit Standard weighing pan Weighing pan adapter Draft shield WMC operating instructions this document Production certificate and CE Declaration of Conformity SV NNN NS NINSININININIS NINN CD ROM with instructions and PC software Electronic Un
5. click Attention Instructions and precautions for custom weighing pan The weighing pan support A comes with a concentric M2 thread to attach a custom weighing pan Note the following conditions so as to not damage the weigh unit The tightening torque of the screw must not exceed 30 Nem 2 65 in lbs Use Indicating Type Torque Screwdriver do NOT use click type Observe also the tensile strength of the screw used This is valid only for metallic counterparts e The screw must penetrate approx 3 mm e Use only non magnetic material for your weighing pan eg nickel chromium steel titanium brass aliminum etc e Switch off the weigh module before installing the weighing pan See section Dimensions page 31 for dimensions of your weighing pan 4 6 Connect Weigh Unit and Electronic Unit The weigh unit housing has no plug or socket but a direct cable exit Typically the cable length is 3 m Connect the plug to the appropriate socket of the electronic unit Align the red dot of the plug with the red dot on the socket A then push the plug into the socket A clicking sound confirms that the plug is locked in place To unlock the plug pull the sleeve B back then pull the plug out of the socket Attention Lay the cable so that no one will trip over it and so that no vibrations can travel up the cable and be transferred to the weigh unit 4 7 Connect Terminal and Adjust Settings You ll need this
6. host see Terminal instructions Choice of built in RS232C or optional interface the termi nal can be used to configure one of the interfaces for the host see terminal instructions Setting interface parameters via MT SICS COM command interface Configured using SICS com mand COPT via the built in RS232C Built in RS232C via MT SICS COM command Via terminal as per terminal instruc tions Via terminal as per terminal instruc tions FastHost com mands as per MT SICS reference man ual Available on host interface Available on host interface Available on built in RS232C assuming it is configured as host interface Available on built in RS232C assuming it is configured as host interface Configuring the Weigh Module 15 Interface com mands YG Electronic unit Weigh unit Q Weigh unit Optional interface Electronic unit Weigh unit Termi nal LA Electronic unit Weigh unit Optional interface Terminal Notes When the terminal is removed the system behaves like a weigh module with out a terminal with a RS232C standard interface Configura tion 1 When the terminal is removed the system behaves like a weigh module with out a terminal with a RS232C standard interface and addi tional optional inter face Configuration 2 5 1 Preparatory Steps for Configurat
7. Troubleshooting Weigh Module Errors and Malfunctions 24 7 Maintenance and Service 26 7 1 Cleaning the Weigh Module 26 7 2 Maintenance 26 8 Technical Data 27 8 1 General Data 27 8 2 Model Specific Data 29 8 3 Key fo Types and List of Available Models 30 Table of contents 3 8 4 Dimensions 31 8 4 1 WMC weigh unit dimensional drawing with draft shield 31 8 4 2 Standard weighing pan dimensional drawing 31 8 4 3 Weighing pan adapter dimensional drawing 32 8 4 4 Weighing pan support dimensional drawing 32 8 4 5 Custom weighing pan drawing limitations 32 8 4 6 Electronic unit dimensional drawing including mounting bracket 33 8 4 7 SWT terminal dimensional drawing 33 8 5 RS232C Interface Standard Interface Specifications 34 8 6 Specification for Aux Connections 34 9 Accessories and Spare Parts 35 9 1 Accessories 35 9 2 Spare Parts 35 10 Appendix 36 10 1 Conversion Table for Weight Units 36 10 2 Volume Mass Conversion Table 36 11 Glossary 37 12 Index 40 4 Table of contents 1 Introduction Thank you for choosing a METTLER TOLEDO weigh module 1 1 Introduction to the WMC Weigh Module These instructions apply to all WMC weigh modules Each weigh module consists of a weigh unit and an elec tronic unit A terminal may be connected if required The optional SWT terminal has a monochrome display and built in applications All WMC models have the following features e Integrated RS232C interface e Optional inte
8. WMC Bridge 21 00900 g LST B 13 1 00 25 69 4 2148 1055 LST B 14 BU0 123456789 LST B CO 0 0 LST B C4 0 LST B Cx 1 LST B COM 06 30 LST B FCUT 0 000 LST B 110 LST B M01 0 LST B M02 2 LST B M03 0 LST B M17 00 00 00 0 LST B M18 1 LST B M19 200 00000 g LST B M20 200 00000 g LST B M21 0 0 LST B M22 1 0 1 00000000E 00 cul 1 00000001E 01 LST B M22 2 0 1 00000000E 00 cu2 1 00000001E 01 LST B M23 0 LST B M31 0 LST B M32 1 00 00 0 LST B M32 2 00 00 0 LST B M32 3 00 00 0 LST B M33 0 LST B M35 0 LST B M67 50 LST B RDB 5 LST B TSTO 0 LST B UPD 10 173 LST B USTB 0 2 000 3 000 LST B USTB 1 2 000 5 000 LST A USTB 2 2 000 5 000 Note For reading and restoring the settings use the e Loader from METTLER TOLEDO For weigh modules with a terminal connected both the system set tings and the user specific settings can be recorded While viewing the system settings or user specific settings simply press the Print key on the terminal key with the printer symbol The current settings will be output via the interface 5 2 8 Resetting user specific settings to factory default The current user specific settings can be reset to the factory default using the FSET command T 20 Configuring the Weigh Module For weigh modules with no terminal connected use the FSET com mand to reset 1 Weigh modules with a terminal connected On the SWT termina
9. fo set how many digits of the weighing result should be displayed For weigh modules with a terminal connected use the 1 10d func tion key to set readability Note Depending on your particular weigh module you may have several of these function keys available such as 1 100d and 1 1000d For more information on these function keys see the description for the Weighing application terminal instructions Configuring the Weigh Module 17 5 2 3 Set stability criteria The stability criterion specifies when a weighing result is considered stable A stability criterion must also be ful filled to perform the zeroing and taring functions A separate stability criterion can be defined for every mode weighing Zeroing and taring A value is considered to be stable when it moves within a defined bandwidth during a specified observation period These two parameters length of observation and bandwidth define the stability criterion For weigh modules without a terminal use the USTB command to T set stability criteria For weigh modules with a terminal stability criteria settings reading T release are part of the weighing parameters On the SWT terminal ata you ll find these settings in the system settings 5 2 4 Activating and defining the fixed filter Use the MO1 command to set the weighing type and the M02 command to set the ambient condit
10. sensitive to ambient conditions such as air movements and vibrations In general this also increases the measurement accuracy repeatability You can also control the measurement accuracy and the weighing time by changing the settings for stability criteria see Set stability criteria page 18 For weigh modules with no terminal connected use the M02 com T mand fo adjust your system to ambient conditions filter damping This Ti command from the standard SICS command set level 2 is described in the MT SICS reference manual Note If the sensor mode weighing type is active and the FCUT command has been used to define a freguency limit see Activating and defining the fixed filter page 18 the ambient condition settings for the sensor mode will not take effect In this case the weigh signal is processed by the fixed filter 18 Configuring the Weigh Module 1 Note For weigh modules with a terminal connected adjusting the system to ambient conditions is part of the weighing parameters On the SWT ter minal you ll find these settings in the system settings The following cut off frequencies are associated with the MO2 command parameters at MO1 2 and FCUT lt 0 001 Hz MO2 0 MO2 1 MO2 2 M02 3 MO2 4 5 Hz 0 65 Hz 0 28 Hz 0 15 Hz 0 056 Hz 5 2 6 Setting the update rate for continuous weight transmission For weighing applications such as dosing to a specif
11. weight reading that has not met the stability criterion A value like this is transmitted with a status of D dynamic as in S D 101 01234 g cf stable weight value Gross weight Weight of an object including its tank container or packaging Handshake Denotes the manner in which the recipient directs data transmission via an RS232 interface to avoid data over runs Hardware handshake Data flow control with the aid of separate control lines whose status is controlled by the recipient On weigh modules these are the CTS clear to send and RTS request fo send lines Increment Another name for readability Initial adjustment During production of the weigh module the built in weight is compared to a traceable adjustment weight whose weight is known exactly using a software routine The resulting adjustment factor is stored in the system s permanent memory The adjustment factor is responsible for the accuracy of the adjustment using the built in weight Following an adjustment by the user this new factor replaces the factory defined adjsutment fac for and will remain in use unless the weigh module settings are reset Glossary 37 38 Glossary Initial calibration The term used at METTLER TOLEDO for initial adjustment Linear filter A filter with a fixed defined damping independent of how the weight is measured over time Linearity Deviation of a given measured value weight value from the ideal straight line
12. 0 1 Technical Data 31 8 4 3 Weighing pan adapter dimensional drawing Dh b 2 5540 03 S a zs 6 Sot j 7 A D oo N 0 UN 2 0 25x45 SG EMA Ke 2 D4 540 03 min 1 0 max 4 75 32 Technical Data 8 4 6 Electronic unit dimensional drawing including mounting bracket 152 60 147 9 5 123 8 4 7 SWT terminal dimensional drawing METTLER TOLEDO a oe EXCELLENCE gt Technical Data 33 8 5 RS232C Interface Standard Interface Specifications Interface type Voltage interface as per EIA RS 232C DIN 66020 CCITT V 24 V 28 Max cable length 15m Signal level Outputs Inputs 5V 1 5V RL 3 7kO 3V 25V 5V 15V RL 3 7KO 3V 25V Connection D Sub 9 pin female Operating mode Full duplex Transmission mode asynchronous serial bit Transmission code ASCII Baud rotes 600 1200 2400 4800 9600 19200 384001 can be selected using interface commands Bits parity 7 Bit Even 7 Bit Odd 7 Bit None 8 Bit None can be selected using interface commands Stop bits 1 stop bit Handshake None XON XOFF RTS CTS can be selected using interface commands End of line lt CR gt lt LF gt lt CR gt lt LF gt can b
13. 2C interface 11132500 LocalCAN Connect up to 5 devices with LocalCAN connection 11132505 MiniMettler backwards compatible with older METTLER TOLEDO devices 11132510 PS 2 Connect commercial keyboards and barcode readers 11132520 BT Bluetooth For wireless control of up to 7 peripheral devices 11132530 BT Bluetooth Wireless connection to a BT P42 printer a second BT BLD display or PC 11132535 Ethernet For connecting to an Ethernet network 11132515 USB RS232C converter 11103691 Connecting cables Terminal electronic unit connector cable 6 pin 0 575m 1 9ft 11132124 0 945m 3 1ft 11132129 2 6 5ft 11132133 Miscellaneous Terminal holder for SWT terminal including mounting screws 11121255 Mounting bracket for electronic unit including DIN clip and mounting screws 11121254 CarePac 20g F1 1g E2 11123006 OIML weight 20g E2 plastic box incl certificate 00158437 OIML weight 10g E2 plastic box incl certificate 00158427 Tweezers bent tips length 130 mm 11116540 Tweezers straight tips length 220 mm 11116544 Only with terminal 9 2 Spare Parts Order number Weigh units Weigh unit with mounted plastic cover Cincll 3 m cable with connec WMC25 0H 11149001 tor WMC15 0H 11149011 WMC24 0H 11149003 Electronic units Electronic unit without power supply power cord and mounting WMC25 E 11149027 bracket WMC15 E 11149026 WMC15 E 11149028 Weighing
14. EDO recommends that you use the AC adapter provided with your unit to oper ate it Make sure that the voltage printed on the adapter matches your local power supply Plug the adapter into a grounded outlet only 6 Safety Information 3 Overview Weigh unit Housing Plastic cover Connector for electronic unit direct cable exit and plug Level bubble leveling aid Base mounting flange Weighing pan support with standard weighing pan Draft shield Housing Weigh unit connector Terminal connector Optional interface plug in Aux connectors for ErgoSens hand or foot operated buttons RS232 C standard inter face Connector for AC adapter 15 Display monochrome 16 Keyboard Weighing pans 17 Standard weighing pan 18 Weighing pan adapter Overview Mounting bracket for elec tronic unit including DIN clip and screws Terminal holder for SWT terminal including screws accessory 2 Terminal electronic unit connector cable 0 575m 1 9ft or 2m 6 5ft long Note The maximum allowable cable length is 5m 16 4ft 22 AC adapter 23 Power cable country specific 8 Overview 4 Initial Startup of the Weigh Modules This section tells you how to unpack your new weigh module set it up
15. S D current weight reading g 6 2 Taring Function Taring after fulfillment of the stability criterion Command T Response T S current weight reading g Response error TI Immediate taring regardless of the stability criterion Command TI Responses TI S current weight reading g TI D current weight reading g Response error TI I 6 3 Zeroing Functions Continuously transmits all weight readings regardless of stability This continuous transmis sion mode is particularly helpful for dosing to a specified target weight because it allows moni toring of the continuous changes in weight The effective number of transmitted readings per sec ond may not deviate more than 1 reading per second from the set transmission rote Stable weight value Dynamic non stable weight reading This command sets the current stable weight reading that references the current zero as tare weight transfers it fo the tare memory and transmits it across the interface The current weight reading will then be set to zero If the weigh module is in the stabilization phase the command will not be executed until the stability criterion for taring has been met or it will cancel in the event of a timeout The current stable weight reading net weight has now been set to Zero Tare function cannot be carried out This could occur if the current weight reading referencing the current zero is negative or if the stability criterion
16. a result is recorded usually a stable weight value Weighing range Range where the weight to be measured must fall so that the weigh module can record it Range between zero and maximum load Glossary 39 40 Index 12 Index A AC adapter 9 14 Accessories 35 Adjusting 17 18 Ambient conditions 10 18 27 Aux Connections 34 c CarePac 35 CD ROM 9 10 Cleaning 26 Clip 9 11 Configuration 15 Connector cable 35 Conversion table for weight units 36 D Declaration of Conformity 9 Dimensions 31 Documentation 10 Draft shield 9 12 35 E Errors 24 F Filter damping 18 G GLP 5 GMP 5 H Host computer 15 16 Interface optional 15 RS232C 15 34 standard 15 Introduction 5 ISO 14001 5 9001 5 L Level 11 M Maintenance 26 Malfunctions 24 Materials 27 Mounting bracket 9 11 MT SICS 15 MT SICS reference manual 10 Overload protection 12 Packaging 9 Plastic cover 11 35 Power cable 9 Power supply 27 28 Preparatory steps for configura 16 tion Protection 27 Protective cover 35 Readability 17 Relative humidity 27 RS232C 15 34 Safety information 6 Scope of delivery 9 Spare parts 35 Stability 18 Taring Function 23 Technical data 27 General 27 Modules with internal 29 adjustment Type designation code 30 Terminal 13 Terminal holder 13 Transmission of Weight Values 22 Troubleshooting 24 Type designation code 30 Unpacking 9 Update rate 19 User settings 19 Vie
17. e selected using interface commands GND Data Pin 2 Transmission line for scale TxD T Pin 3 Receiving line for scale RxD Pin 5 Signal ground GND Pin 7 Ready to send hardware handshake RTS Pin 8 Ready to receive hardware handshake RTS Handshake 1 38400 baud only possible with e Weigh module without terminal or e Weigh module with terminal only via the optional RS232C interface 8 6 Specification for Aux Connections You can plug the ErgoSens from METTLER TOLEDO or an external optical sensing device into the Aux 1 and Aux 2 jacks This allows you to perform functions such as taring Zeroing printing etc only together with ter minal External wiring l AN bo not connect Connection 3 5 mm stereo jack Electrical data Max voltage 12 V Max power 150 mA Switching contact 34 Technical Data 9 Accessories and Spare Parts Accessories from METTLER TOLEDO will expand the functionality of your weigh module and open up additional applications This section lists the currently available options and replacement parts 9 1 Accessories Order number Terminals SWT Terminal touchscreen monochrome display including 2 terminal cables 0 575 m 11121057 and 2m long including protective covering and documentation Interface options plug in module and accessories RS232C second RS23
18. eigh module If the unit settings and current ambient con ditions prevent the weigh module from meeting the stability criterion for zeroing when it is turned on the system zero will become the current zero once a stability time out has occurred Because the system Zero is usually somewhat higher than the base load the current weight value in this case will actually be a negative number rather than zero You must zero with stability before you can get correct weighing results or use the adjustment and test functions Tare memory Weight value memory that is overwritten each time the tare function is activated and cleared at each Zeroing Tare weight Weight of the tank container or packaging The weight on the weigh module relative to the current zero will be considered the tare weight and stored in the tare memory Timeout The period of time during which the weighing value must meet the corresponding stability criterion If current settings and ambient conditions make this impossible the command is cancelled and the weigh module responds with the status I Impossible the command cannot be executed right now e g S I Underload Load the is less than the base load If the load falls below this limit such as when the weighing platter is miss ing the weigh module will respond with a status of as in Z Weighing period weighing time The time that elapses between the placement or removal of a weight weight change until
19. es and interface parameter settings If you or the person at your company responsible for maintaining the weigh module cannot remedy the prob lem please contact your supplier or your METTLER TOLEDO contact Be sure fo have the following information ready when contacting us e Your weigh module s current settings LST command e Size of preload if you re working with the weighing pan adapter and a custom setup for accepting objects to be weighed e Brief description of weighing application and the error or malfunction you are experiencing Weighing Operation 25 7 Maintenance and Service To ensure that your weigh module remains reliable accurate and functional for many years to come the indi vidual components must be cleaned and maintained periodically as appropriate for the intensity of use and the risk of contamination with debris 7 1 Cleaning the Weigh Module Clean the weighing pan and the weigh unit housing regularly with a damp cloth The electronic unit and termi nal can also be cleaned in this fashion as needed For tougher dirt a mild household cleaner may be used Make sure that no liquid penetrates inside the components protect with plastic cover CAUTION Never use cleansers containing solvents or gritty scrubbing particles They could damage or scratch certain surfaces particularly the terminal screen 7 2 Maintenance Your weigh module is a precision instrument and periodic maintenance is o
20. for taring has not been met timeout The current weight reading referencing the cur rent zero is immediately considered to be the tare weight It is transferred to the tare memory and transmitted across the interface regardless of the stability criterion for the taring function being met The current weight reading net weight will then be set to zero The current stable weight reading net weight has now been set to Zero The current dynamic weight reading net weight is set to zero the D stands for dynamic not stable In this case the zero is also consid ered unstable Command cannot be executed this may hap pen if the current weight reading referencing the current Zero is negative Zeroing creates a new Zero reference point sets the current weight reading to zero and clears the tare memo ry The weigh module automatically zeroes itself each time it is powered up Weighing Operation 23 24 If the weigh module cannot zero upon power up due to filter settings and prevailing ambient conditions it will time out and the system zero will be used This means that all weight values will reference this zero You will not be able to perform a test or an adjustment until a Zero command is successfully executed Zeroing with fulfillment of the stability criterion Command Z Creates a new zero If the weigh module is in the stabilization phase the command will not be executed until the stability criteri
21. formed via the terminal weigh modules without a terminal are configured using MT SICS commands issued from a host computer An expan sion of the MT SICS command set is available for product specific configuration work All weigh modules come from the factory with a built in RS232C interface In addition the modules can be equipped with a second optional interface that is inserted into the electronic unit see Technical Data page 27 The optional interfaces are delivered with their own instructions describing installation and all con figuration work needed The procedure for configuring the weigh modules and interface functionality depends on how the individual weigh module is equipped There are four possible configurations AA WN Configurations Weigh module without terminal with built in RS232C standard interface Weigh module without terminal with built in RS232C standard interface and additional optional interface Weigh module with terminal and built in RS232C standard interface Weigh module with terminal built in RS232C standard interface and additional optional interface Interface com mands 1 a Electronic unit Weigh unit Q Weigh unit Optional interface t Electronic unit Weigh unit Termi nal amp Electronic unit Weigh unit Optional interface Terminal HOST interface Built in RS232C Optional interface Built in RS232C can be configured via the terminal for
22. function between zero load and maximum load Long term stability Specifies sensitivity deviation after a defined period of time such as after one year Maximum load Maximum weight that the weigh module can still barely measure cf overload Net weight Weight of an object excluding its tank container or packaging Net weight gross weight minus tare weight see gross weight tare weight Overload Load that exceeds the available maximum load for the corresponding weigh module In the event of overload the weigh module responds with a status of as in S Preload Load above and beyond the base load that is on the scale when the weigh module is switched on or zeroed see also available maximum load Readability Another term for resolution or display accuracy Repeatability sd A critical factor for the accuracy of weight measurement The repeatability value corresponds fo the statistical standard deviation sd At METTLER TOLEDO the standard deviation is calculated from ten consecutive mea surements of the same weight under the same ambient conditions Reproducibility Old term for repeatability Technically correct term for the accuracy with which a measurement can be repeated after time has passed under similar ambient conditions Resolution Another term for readability or display accuracy At METTLER TOLEDO resolution denotes the number of weight increments points that a weighing sensor can differentia
23. g in accordance with Directive 2001 95 EC the power supply and weigh module should be treated as double insulated Class devices Therefore grounding tests are not required It is also unnecessary to conduct a grounding test between the pro fective ground of the power supply and a metallic surface on the weigh module housing Because precision weigh modules are sensitive to electrostatic discharge a coupling resistor typically 10kO is installed between the grounding conductor at the power supply input and the power supply output See the equivalent circuit diagram for placement This resistor is not part of the electrical safety plan therefore it does not need to be tested at regular intervals Equivalent circuit diagram Plastic Housing Input 100 240 VAC 10 kQ coupling resistor for electrostatic discharge 28 Technical Data 8 2 Model Specific Data Parameter WMC25 SH WMC24 SH WMC15 SH Limit values Maximum load 21g 21g llg Readability 0 01mg 0 1mg 0 01mg Repeatability sd at 0 02 mg 20 9 0 1 mg 20 9 0 02 mg 10 9 nominal load Repeatability sd at low 0 2 mg 100 g 0 08 mg 5 9 0 012 mg 5 9 load Linearity deviation 0 05 mg 0 2 mg 0 05 mg Eccentric load deviation 0 12 mg 10 g 0 4 mg 10 g 0 12 mg 5 g test load Sensitivity offset 4x10 Rat 1x10 Rt 4x10 Rut Sensitivity temperature drift 2 0 0002 C 0 0002 C 0 0002 C Sensitivi
24. ied target weight the weigh module must constantly record weight changes and forward the readings regardless of their stability to the dosing system so that it can control the dosing process In such cases you should activate the send continuous mode to ensure a contin uous flow of weight readings and set the number of weight readings to be transmitted each second via the interface update rate T 1 For weigh modules with no terminal connected use the SIR com mand standard SICS level 0 to activate the send continuous mode mode Use the UPD command standard SICS level 2 to set the num ber of weight readings to be transmitted per second Update rates of up to 92 readings per second are possible For weigh modules with a terminal connected you can activate the send continuous mode and set the update rate as part of the interface definition in the system settings Update rates of up to 23 readings per second are possible if a terminal is connected 5 2 7 Recording user settings The current user settings can be sent to the interface using the LST command Configuring the Weigh Module 19 1 For weigh modules with no terminal connected use the LST com mand expanded SICS command set for WMC weigh modules to out put a list of all user specific settings The following example shows part of such a list LST B 12 WMC25 SH
25. inor or medium injuries if not avoid ed Attention no symbol for important information about the product Note no symbol for useful information about the product Warning Symbols General hazard Electrical shock 2 2 Product Specific Safety Notes Your weigh module meets the state of the art technology and complies with all recognized safety rules howev er certain hazards could arise Do not open the weigh module It does not contain any parts which can be maintaines repaired or replaced by the user If you ever have problems with your weigh module contact your authorized METTLER TOLEDO dealer or service representative Always operate and use your weigh module only in accordance with the instructions contained in this manual The instructions for setting up your weigh module must be strictly observed If the weigh module is not used according to these Operating Instructions protection of the weigh module may be impaired and METTLER TOLEDO assumes no liability Staff Safety In order to use the weigh module you must have read and understood the operating instructions Keep the operating instructions for further reference Use only METTLER TOLEDO accessories and peripheral devices these items are designed to work optimally with your weigh module Safety Notes It is not permitted to use the weigh module in explosive atmosphere of gases steam fog e dust and flammable dust hazardous environments CAUTION METTLER TOL
26. ion T For weigh modules with a terminal connected the configuration tasks described in the following sections are performed using the terminal Therefore no preparatory work is required however it is assumed that you have the terminal instructions handy and are already familiar with how to operate the terminal and use the menu structure The menu options for configuring the weigh module are found in the system settings of the terminal The configuration tasks described in the following section are for weigh modules without a terminal At the end of each section you will see a note for users of weigh modules with terminals telling you where the equivalent settings can be found on the terminal Weigh modules without a terminal are confugred via the interface with MT SICS commands You ll need a host computer PC and a terminal program fo do this Connect the host computer with the built in RS232C standard interface to the weigh module Set the communica tions parameters of the terminal program as follows Baud rate 9600 Data bits 8 Stop bits Parity None End of line lt CR gt lt LF gt Handshake None These are the factory settings for the built in RS232C standard interface on the weigh module You can change the RS232C standard interface communications parameters using the COM command SICS level 2 Once you have made your changes you must adjust the terminal program s communicat
27. ions parameters accordingly so that you can continue to communicate with the weigh module For weigh modules that have an additional optional interface you can configure them using the COPT command SICS level 2 Only the RS232C standard interface supports the COPT command therefore for this configuration the weigh module must first be connected with the host computer via the standard interface 16 Configuring the Weigh Module Once you have configured your system you can connect the host computer with the optional interface The RS232C standard interface itself cannot be configured it always uses the factory settings see above If an optional interface is available the RS232C standard interface is used as a service interface Note If you have a terminal you can connect it temporarily and configure the optional interface using the terminal This is easier and faster than configuring it with the COPT command Once you ve configured the optional interface you can disconnect and remove the terminal The next section describes the most important configuration task user settings with special consideration giv en fo the expanded MT SICS command set for WMC weigh modules without a terminal 5 2 Configuring the Weigh Module It is recommended that the weigh modules are configured before they are used in order to achieve best weigh ing performance The following sections provide information on the most important co
28. ions see Adjustments to ambient conditions filter damping page 18 These two settings determine the type and strength of signal filtering that will occur With the MO1 command you can choose between two weighing types Sensor Mode command MO1 2 or Universal command MO1 0 For the Sensor mode weighing type command MO1 2 the FCUT T command offers an additional option for defining filter behavior Filtering in Sensor mode is chronologically linear fixed non adaptive filter and is appropriate if the weight readings need to be further processed For weigh modules with a terminal connected selecting the weighing T type is part of the weighing parameters On the SWT terminal you ll find ab these settings in the system settings The ambient conditions see Adjustments to ambient conditions filter damping page 18 deter mine filter damping of the weighing signal These two settings deter mine the filtering of the weighing signal 5 2 5 Adjustments to ambient conditions filter damping Adjusting filter damping allows for the weigh module to be optimally adapted to ambient conditions This set ting determines how quickly the weigh module will react to a change in weight but also how sensitive the module will be fo outside disturbances Strong filter damping will cause the module to react more slowly to small changes in weight but it will also make it less
29. it Box Parts WMC24 SH WMC15 SH WMC25 SH Electronic unit Mounting bracket for electronic unit including clip and screws for aftaching to DIN standardized rail AC adapter NN SS Sisi SIS Sisi sis Power cable country specific Terminal option Terminal Box SWT terminal monochrome display including protective cover 2 terminal electronic unit connector cables 0 575m 1 9ft and 2m 6 5ft long Terminal instruction manual XS instructions part 2 and part 3 Initial Startup of the Weigh Modules 10 4 3 Available Documentation The table below lists all documentation available for the WMC weigh modules along with the document num bers for each document German English French Spanish Italian Operating Instructions for WMC 11781253 11781254 11781255 weigh modules this document MT SICS reference manual 11781363 Instructions for SWT terminal Operating Instructions XS Balances 11781117 11781118 11781119 11781120 111781121 Part 2 Operating Instructions XS Balances 30003897 130003899 30003910 30003911 30003912 Part 3 The CD ROM 11781257 provided with your unit includes all of the documents listed above 4 4 Assembling the WMC Weigh Modules The WMC weigh modules can be integrated into higher level systems machines systems etc Be sure to fol low the tips in the following
30. l all settings can be reset in the system settings Please read the notes and warnings on this subject in the terminal instructions Configuring the Weigh Module 21 6 Weighing Operation This section contains helpful tips for weighing operation and information T on possible error messages Weigh modules with a terminal connected are operated using the terminal and all error messages are displayed in plain English on the terminal consult the terminal instructions for more information Information in this section applies to users with weigh modules without a terminal The MT SICS commands listed here are only some of the available commands you can use in weighing operations See the MT SICS reference manual for more information and detailed command descriptions 6 1 Transmission of Weight Values The readings transmitted via the interface refer either to Zero or to the reading created as a result of the tare command depending on whether Zeroing or taring was the last function performed Note that the system zeroes automatically each time it is powered up Zeroing upon startup Commands that cannot be executed successfully until a stability criterion is met will cancel if stability is not attained within 40 seconds timeout Weight query and transmission of a single stable weight reading Command S Transmits the current stable weight reading If the weigh module is in the stabilization phase the weight reading wi
31. le Density 1000 g l water Volume Mass 11 1000 g 1 ml lg 1 ul 1 mg 1 nanoliter 1 ug 11 Glossary Adaptive filter A filter where damping depends on the development of the weight signal over time cf linear filter Adjustment Sensitivity adjustment with the goal of getting as close to the ideal value as possible On weighi modules the correction is made at two weight points at the current zero and the value of the adjustment weight Available maximum capacity Maximum load that the weigh module can manage to measure when the preload is included Available maxi mum load nominal maximum load minus preload Base load The load that is necessary to use the full weighing range of the weigh module once it is switched on Another name for dead load Calibration An old term no longer considered correct for adjustment The technically correct term for the determination of the deviation between the actual and measured value Calibration factor A term frequently used for the adjustment factor initial adjustment The technically correct term for the factor by which a measured value must be multiplied fo obtain the correct actual value Dead load At METTLER TOLEDO this term is usually used to denote the base load In general usage dead load may also be used to mean preload including base load Display accuracy Another term for resolution or readability Dynamic weight A
32. ll not be sent until the sta bility criterion for weighing has been met Response S S current weight reading g Stable weight value the second S stands for stable Response errors SI Command cannot be executed e g because the stability criterion for weighing was not met timeout Weight query and immediate transmission of a single weight reading Command SI Immediate transmission of the current weight reading regardless of its stability Responses S S current weight reading g Stable weight value S D current weight reading g Non stable weight reading the D stands for dynamic not stable Automatic transmission of each stable weight reading after a change in weight Command SNR Transmits the current stable weight reading and automatically sends all subsequent weight read ings that fulfill the stability criterion after any change in weight You can input the weight change that is necessary to trigger transmission as needed If you do not want any more readings cancel automatic transmission with commands such as S SI or reset Response S S current weight reading g Stable weight value After a change in weight and subsequent stabilization the module will automatically transmit the next stable weight reading 22 Weighing Operation Continuous transmission of all weight readings continuous mode Command SIR Responses S S current weight reading g
33. ne of the basic requirements to ensure it will perform well for you for many years to come Maintenance intervals will depend on the duration of use and the application and ambient conditions Mainte nance must be performed by a technician trained by METTLER TOLEDO Ask your METTLER TOLEDO office about service packages regular maintenance by an authorized service tech nician will ensure your weigh module remains accurate and lengthen its service life 26 Maintenance and Service 8 Technical Data This section includes the most important technical data for your weigh module 8 1 General Data Power supply e External power supply e Cable for power supply e Power feed in at electronic unit Protection and standards e Overvoltage category e Pollution level e Protection e Safety and EMV standards e Application range Ambient conditions e Height above sea level e Ambient temperature e Relative humidity e Warm up time Materials e Weigh unit housing e Electronic unit housing e Terminal housing e Weighing pans Standard Equipment Primary 100 240VAC 15 10 50 60Hz 0 5A Secondary 12VDC 3 2A provides electronic over voltage protection Please note Detailed information on your METTLER TOLEDO power supply unit page 28 A Use only with a tested AC Adapter with SELV output gt current Ensure correct polarity o e e Class II 2 non conductive soiling only eve
34. nfiguration tasks 5 2 1 Adjusting the weigh module Following initial startup the weigh module must be adjusted using an external weight Various parameters can be set for the adjustment For weigh modules without a terminal the command C2 SICS level T 2 is used for the adjustment and the corresponding settings Use the en M19 command to set up the weight of the external adjustment weight you intend to use Weigh module with a terminal connected The settings for adjustment T using an external weight are part of the system settings See the aa description of the Weighing application for how to perform the adjust ment You can find more information in the terminal instructions Note The adjustment of the weigh module should be carried out if the system has not been used for a longer period Allow time for the weigh module to warm up see General Data page 27 We recommend adjustment at intervals of max 24 hours 5 2 2 Set readability Readability refers to the smallest difference in weight that the weigh module can still measure and transmit via the interface and or show on the display see Technical Data page 27 The factory set readability maxi mum possible number of places after the decimal point can be reduced if necessary to shorten weighing time For weighing modules without a terminal use the RDB command to T set readability Alternatively the M23 command can be used
35. on for zeroing has been met Response ZA The current stable weight reading is set to zero and the tare memory is cleared Response errors ZI Command cannot be executed e g because the stability criterion for zeroing was not met timeout Immediate zeroing regardless of the stability citerion Command Zl A new zero is immediately set regardless of the stability criterion for zeroing being met The tare memory is then cleared Response ZI S Zeroed on the basis of a stable weight reading ZID Zeroed on the basis of a dynamic weight read ing the D stands for dynamic not stable 6 4 Troubleshooting Weigh Module Errors and Malfunctions Go through each of the steps offered here and try to remedy the problem yourself it may be due to system set tings Never open the weigh module housing If your weigh module doesn t perform correctly until it has been powered up for quite a while If the weigh module responds to transmission taring or Zeroing commands with S I TI or Z I for a long time after being powered up e Check ambient conditions e Check your zero after power up by executing an SI command If the weight reading deviates more than a few increments from zero the unit was unable to get a stable reading upon being powered up and was then unable to zero e Temporarily change your filter settings and or your stability criterion for zeroing so that you can successfully zero the
36. op Cc e 4 U c O ab Table of contents 1 Introduction 5 1 1 Introduction to the WMC Weigh Module 5 1 2 Conventions and Symbols Used in these Operating Instructions 5 2 Safety Information 6 2 1 Definition of Signal Warnings and Symbols 6 2 2 Product Specific Safety Notes 6 Overview 7 Initial Startup of the Weigh Modules 9 41 Unpacking the Weigh Module 9 4 2 Scope of Delivery 9 4 3 Available Documentation 10 4 4 Assembling the WMC Weigh Modules 10 4 4 1 Weigh unit installation 10 4 4 2 Levelling the weigh unit 11 4 4 3 Electronic unit assembly and mounting 11 4 5 Install the Weighing Pan and the Draft Shield 11 4 6 Connect Weigh Unit and Electronic Unit 13 4 7 Connect Terminal and Adjust Settings 13 4 8 Connect the Unit fo the Power Supply 14 5 Configuring the Weigh Module 15 5 1 Preparatory Steps for Configuration 16 5 2 Configuring the Weigh Module 17 5 2 1 Adjusting the weigh module 17 5 2 2 Set readability 17 5 2 3 Set stability criteria 18 5 2 4 Activating and defining the fixed filter 18 5 2 5 Adjustments to ambient conditions filter damping 18 5 2 6 Setting the update rate for continuous weight transmission 19 5 2 7 Recording user settings 19 5 2 8 Resetting user specific settings to factory default 20 6 Weighing Operation 22 6 1 Transmission of Weight Values 22 6 2 Taring Function 23 6 3 Zeroing Functions 23 6 4
37. pans Standard weighing pan 15mm requires weighing pan adapter 30005370 Weighing pan adapter 14mm plastic 30005372 Miscellaneous 12V Power supply without country specific power cable 11107909 Protective covering for the SWT terminal 11106870 Plastic cover cover for weighing pan support 30005374 Standard draft shield 30005371 Accessories and Spare Parts 35 36 Appendix 10 Appendix 10 1 Conversion Table for Weight Units Kilogram 1 kg 1000 0 g 1g 0 001 kg Milligram 1 mg 10 001 g 1g 1000 0 mg Microgram 1 ug 0 000001 g 1g 1000000 0 ug Carat 1 ct 0 2 g lgi 5 0 ct Pound 1 Ib 453 59237 g 1g 0 00220462262184878 Ib Ounce avdp 1 oz 28 349523125 g lg 0 0352739619495804 oz Ounce troy 1 ozt 31 1084768 g 1g 0 0321507465686280 ozt Grain 1 GN 0 06479891 g 1g 15 4323583529414 GN Pennyweight ldwt 1 55517384 g 1g 0 643014931372560 dwt Momme l mom 3 75 g 1g 0 266666666666667 mom Mesghal 1 msg 14 6083 g 1g 10 217 msg Tael Hong Kong 1 tih 37 429 g 1g 0 0267172513291833 lilh Tael Singapore 1 tls 37 7993641666667 g 1g 0 0264554714621853 tls Malaysia Tael Taiwan 1 tit 37 9 g 1g 10 0266666666666667 tlt Tola l tola 11 6638038 g 1g 0 0857353241830079 tola Baht l baht 15 16 g 1g 0 0659630606860158 baht 10 2 Volume Mass Conversion Tab
38. perly level right image not properly level Note You must always level and adjust the weigh unit after moving it to a new location 4 4 3 Electronic unit assembly and mounting The electronic unit can be mounted in any position you wish A mounting bracket and clip for attaching the unit to a DIN standardized rail are provided Proceed as follows for mounting Remove the two existing screws from the bottom side of the electronic unit Torx T 20 and use the provided Torx T 20 countersunk head screws A to secure the mounting bracket A 2 Ye EG Secure the clip B to the front face or underside of the mounting brack et Use the two provided M4 pan head screws Torx T 20 to do so Note The electronic unit can also be attached directly to a support without the clip via the M4 threads of the mounting bracket Important The electronic unit meets the requirements for protection class IP40 If required appropriate protective measures must be taken to protect the unit from diri 4 5 Install the Weighing Pan and the Draft Shield The WMC weigh modules come with a weighing pan adapter and a standard weighing pan The weighing pan adapter can either be fitted with the standard weighing pan or a customized setup Remove the white plastic cover B from the weighing cell This cover protects the weighing pan support A from damage during transport and keeps liquid from penetrating into the weighing cell during clean ing
39. rface plug in e Standard weighing pan and weighing pan adapter for weighing pan support or customized setups Draft shield provided e Mounting bracket and mounting accessories provided e A CD ROM with additional instructions and a PC program for setup and operation of the weigh module are also included A brief word regarding standards directives and procedures for quality assurance The Weigh Modules comply with all commonly accepted standards and guidelines They support standard processes requirements and work methodologies in accordance with GLP Good Laboratory Practice and GMP Good Manufacturing Prac tice The Weigh Modules have been issued a CE Declaration of Conformity METTLER TOLEDO the manufac turer is both ISO 9001 and ISO 14001 certified 1 2 Conventions and Symbols Used in these Operating Instructions These symbols mark specific information on setting up configuring or operating weigh modules T without a terminal T I with a terminal T Introduction 5 2 Safety Information 2 1 Definition of Signal Warnings and Symbols Safety notes are marked with signal words and warning symbols These show safety issues and warnings Ignoring the safety notes may lead to personal injury damage to the weigh module malfunctions and false results Signal Words CAUTION for a hazardous situation with low risk resulting in damaged to the device or the property or in losing of data or m
40. ry once in a while fempo rary conductivity may occur due to condensation In operation the weigh unit is rated IP30 The electronic unit meets IP40 The SWT terminal is rated IP54 See Declaration of Conformity provided separately Use only in closed indoor spaces DO NOT OPERATE in hazardous areas to 4000 m 5 40 C Max 80 at 31 C decreasing lineraly fo 50 at 40 C non condensing At least 60 minutes after the weigh module has been con nected to the power supply the weigh module can be used immediately if it is turned on from standby mode when operated with a terminal connected Polished chromium steel X2CrNiMo17 12 1 4404 resp 316L Polished chromium steel X2CrNiMo17 12 1 4404 resp 316L Painted die cast zinc and plastic Standard weighing pan chromium steel X2CrNiMo17 12 1 4404 resp 316L Weighing pan adapter plastic PEEK CF30 See Scope of Delivery page 9 Technical Data 27 Detailed information on your METTLER TOLEDO power supply unit METTLER TOLEDO weigh modules are shipped with an external power supply In accordance with Class II pro tection it is double insulated and certified It is equipped with functional grounding to ensure electromagnetic compatibility EMC The ground connection has NO safety related function For more information on our products conformity refer to the Declaration of Conformity shipped with each product or download details from www mt com For testin
41. section only if your weigh module was delivered with the optional terminal Place the terminal on a flat surface with the display face down Press the two tabs A on the back of the ferminal fo open if and open the bottom of the terminal B Feed the terminal cable through the cutout in the back of the terminal and plug in the jack C Make sure that the strain relief D is inside the terminal If you want to permanently affix the terminal to the electronic unit you can also attach the terminal holder now accessory item no 11121255 Place the terminal holder E into the corresponding cutout on the bot tom of the terminal and use the knurled screw F provided to secure it from the inside of the terminal Initial Startup of the Weigh Modules 13 14 Close the bottom of the terminal Then push in the two side tabs to completely close the terminal Note You can also use the two tabs on the back side to adjust the viewing angle of the terminal while it is in operation Press both buttons simul taneously and pull the top of the terminal gently upwards or press it down until it clicks into the desired position You can choose from three different positions Remove the two screws Torx T 20 in the bottom of the electronic unit and store them in a safe place Align the terminal holder exactly with the two holes and secure it with the Torx T 20 countersunk head screws
42. sections to select the optimal installation method 4 4 1 Weigh unit installation The weigh modules were designed to record weights very quickly and accurately under normal conditions and communicate the result using the integrated interface and or display the result on a terminal In practice ambi ent conditions vibration oscillations shocks air movements and temperature changes affect weighing time and achievable accuracy as well as the repeatability You can adjust various parameters on your weigh module see Configuring the Weigh Module page 15 We recommend that you adjust the settings to the levels needed for your application higher accuracy requirements increase the weighing time period between the placement of the weight and the availability of a stable result Filter settings must be stricter to compensate for unfavorable ambient conditions see Configuring the Weigh Module page 15 this also has a negative impact on weighing time Therefore be sure to note the following e Mount the weigh unit on a base that is mechanically decoupled from the system and therefore free of shocks and vibration e The location of the weigh unit should not be in areas that are exposed to drafts direct sunlight or severe temperature fluctuations e Make sure that any vibrations in the building are not transferred through the floor and to the weigh unit e Make sure that the weigh unit is as perfectly horizontal as possible Use the buil
43. system with a Z command response Z A e If necessary restore the filter settings see Recording user settings page 19 Weighing Operation If the weigh module does not transmit the expected weight readings e Check the weigh module settings by using the LST command inquire user settings e Run the test function with the TST2 command see the MT SICS reference manual The difference sent is the adjustment error also called sensitivity deviation that has developed as a result of drift since the last adjustment The result should give you an idea of whether adjustment is needed Note If the difference is in the hundreds of increments digits you should assume that the weigh module was never adjusted before handled improperly dropped or suffered some other shock or blow You should have a technician check the unit before you use it again e Switch the power off and back on and check the message that the interface sends after the weigh module s startup phase If you see an error message instead of the serial number contact your METTLER TOLEDO Office If there is one of the following error on weight response perform the descript action e Error 10b Check cable e Error 14b Check electronic box wrong electronic box e Error 15b Perform external adjustment If the weigh module doesn t react to your commands at all e Check to see that power is being supplied to your unit e Check your interfac
44. t in precision level to achieve exact leveling It is accept able to have a unit that is not perfectly horizontal if its position is not altered after it has been adjusted see Adjusting the weigh module page 17 e g if it is mounted in a fixed position in the system e Attach the weigh unit to the base across as wide an area as possi ble Use the appropriate holes in the base plate of the cell 4x M3 screws tightening torgue 1 3 2 Nm e The base must be perfectly flat to avoid putting tension on the weigh unit base plate e Make sure that vibrations cannot be transferred across the connector cable between the weigh unit and the electronic unit e Make sure that the weigh unit housing is connected in an electrically conductive manner with the system Initial Startup of the Weigh Modules If your requirements are extremely demanding short weighing time high accuracy we recommend that you try a test setup first and test the entire system under real world conditions using various settings see Configur ing the Weigh Module page 15 This will allow you fo tweak the system and optimize it bit by bit 4 4 2 Levelling the weigh unit The weigh unit must be horizontally aligned leveled at the desired location ENS The weigh unit is equipped with a level control level bubble The weigh unit is completely horizontal when the bubble is precisely in the middle of the level window left image pro
45. te This figure is calculated by taking the maximum load and dividing it by readability For example A maximum load of 20g and readability of 0 00001g yield 2 000 000 points of resolution Sensitivity At METTLER TOLEDO this denotes the relationship between the actual and measured transmitted weight val ue Ideally the sensitivity of a weighing sensor is equal to one Sensitivity deviation Deviation of sensitivity from the ideal value 1 see adjustment Sensitivity drift Deviation of sensitivity due to changes in temperature and or the passage of time see long term stability Software handshake Data flow control achieved by transmitting a stop or start control signal from the recipient to the sender As a rule the signals are Xoff and Xon Stabilization phase Phase after placement or removal of a load during which the weight reading has not yet achieved stability Stabilization time Time from the placement or removal of a load until the first stable weight value is reached Stable weight A weight reading that has met the corresponding stability criterion Such a value is transmitted with a status S stable cf dynamic weight value Startup zero The zero point set when the weigh module is turned on weighing values will reference this value until the Zero function is used to set a new Zero point or until the scale is tared System zero point Zero point set during production at the factory for the w
46. ty stability 0 0001 a 0 0001 a 0 0001 a Typical values Repeatability sd 0 01 mg 0 06 mg 0 01 mg Linearity deviation 0 03 mg 0 13 mg 0 032 mg Eccentric load deviation 0 08 mg 10 g 0 24 mg 10 g 0 08 mg 5 g test load Minimum weight acc to 30 mg 180 mg 30 mg USP Minimum weight U 1 2 mg 2 mg 2 mg k 2 Settling time typ 35 2 55 2 55 Typical uncertainties amp more Repeatability sd 0 01mg 0 000025 Ry 0 06mg 0 000 1 Yo Rgr 0 01mg 0 00005 Rg Differential linearity devia tion sd J1 2x108mg Rni V 2x10 7mg Rni J 2 5x10 8mg Rni Differential eccentric load deviation sd measured at 0 0004 Yo Rnt 0 0012o Rnt 0 0008 Rnt Minimum weight acc to USP 30mg 0 075 Rg 80mg 0 396 R 30mg 0 15 Rg Minimum weight U 1 k 2 2mg 0 005 x Rgr 2mg 0 005 j Ror adapter Interface update rate 92 s 92 s 92 s Weight of balance 0 415 kg 0 415 kg 0 415 kg Dimensions of weigh unit Height with standard 73 35 mm weighing pan Widih 25 mm Depth 65 mm Diameter of standard 15 mm weighing pan Diameter of weighing pan 14 mm Legend Rgr gross weight Rnt net weight weighing sd standard deviation a year annum Technical Data 1 Applies only after adjustment at nominal capacity with an OIML E2 weight see accessories 2 Temperature range 10 30 C
47. wing angle 14 Warm up time 27 Weighing operation 22 Weighing pan Adapter 9 11 35 Custom 12 Standard 9 12 35 Support 1 Weight unit 36 Zeroing 23 GWP Good Weighing Practice The global weighing guideline GWP reduces risks associated with your weighing processes and helps to e choose the appropriate balance e reduce costs by optimizing testing procedures e comply with the most common regulatory requirements gt WWW mt com GWP www mt com wmc Mettler Toledo AG Laboratory amp Weighing Technologies CH 8606 Greifensee Switzerland Tel 41 0044 944 22 11 Fax 41 0 44 944 30 60 www mt com Subject to technical changes Mettler Toledo AG 09 2011 11781254B en For more information 1 1 7 8 1 2 5 4
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