CH-9101 Herisau/Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 EMail sales@metrohm.ch Internet http://www.metrohm.ch 748 DH Sample Changer Instructions for Use 8.748.1003 99.
Contents Contents 1 Introduction ..............................................................................................................2 1.1 Overview ....................................................................................................................... 2 1.2 Sample arm positions .................................................................................................. 4 1.2.1 Positions in the XY-direction .....................................................................
1.1 Overview 1 Introduction 1.
1.1 Overview Instrument front panel: 2 1 6.2053.010 cable/tubing clamps 2 Control cable assembly see page 6.
1.1 Overview Instrument rear panel: 8 Holder for control cable 9 Sockets for control cable 10 Mains switch 11 Connection for mains cable Mains voltage adjustment: see page 5. In networks where the mains voltage is subject to strong HFinterference the Sample Changer should be operated with an additional mains filter, e.g. Metrohm 615 mains filter. 12 Remote sockets for I/O lines The beaker detector is plugged into remote socket 1.
1.2 Overview 1.2 Sample arm positions The sample arm is moved in both the XY-direction (rack positions) as well as in the Z-direction. 1.2.1 Positions in the XY-direction Left-hand rack 1 Wash Soak Right-hand rack X-direction Home Ydirection The sample arm is moved so that it only moves above samples which have already been titrated (i.e. positions which have already been visited). 1.2.2 Positions in the Z-direction The positions in the Z-direction are set in the TiNet configuration.
2.1 Mains voltage, mains connection 2 Sample changer start-up 2.1 Mains voltage, mains connection Check that the voltage set on the instrument corresponds to your mains voltage. If this is not the case then the mains voltage must be altered: 1. Remove the mains cable. 2. Carefully open the compartment above the mains cable with a screwdriver. 3. Remove the voltage selection drum. 4.
2.2 Sample Changer setup 2.2 Sample Changer setup 2.2.1 Setting up the basic instrument Attaching the control cable: Important: Do not lift the sample changer by the sample arm. Check the delivery immediately on receipt for completeness and transport damage. Setup 1. Attach control cable to sample arm: insert the white sleeve with the washer in the cable holder and screw the holding ring tight (with 1.5 mm Allen key). Insert cable and secure with clip. 2.
2.2 Sample Changer setup 2.2.2 Installation of rinsing accessories 1. Screw 6.1808.050 tubing nozzle for the rinsing tubing onto the rear panel of the Sample Changer (fold-out page, Position 16). 2. Attach the rinsing tubing (thin 6.1801.120 PVC tubing) to the tubing nozzle. Use tubing clamps to attach tubing firmly. 3. Pull the nut of the small opening of the canister over the rinsing tubing. 4. Push the other end of the rinsing tubing onto 6.1828.000 connection nipple and screw it tight. 5. Push 6.1812.
2.3 Equipping the titration head 2.3 Equipping the titration head 6.1463.000 Macro titration head: Beaker detector Stirrer M10 screw threads for buret tips 6.1463.010 Micro titration head: Beaker detector Stirrer Built-in buret tips M10 screw threads for electrodes or further buret tips 8 2.722.0020 Rod stirrer 1. Insert stirrer in titration head. 2. Lead stirrer cable through cable holder and through the cable clamps to the rear panel of the Sample Changer. 3.
2.4 Sample racks 2.4 Sample racks Place sample racks in position. Place 6.1432.320 sample beaker in the soak position (see page 4). Use 6.2060.000 holders to carry the racks. 2.5 Sample Changer start up Connect the RS232 interface of the Sample Changer with a COM of the computer: Cables: 25-pole / 9-pole, 3 m............................................. 6.2125.110 25-pole / 25-pole, 3 m........................................... 6.2125.060 Extension cable 25-pole / 25-pole, 3 m................ 6.2125.
3.1 General rules 3 Operation via RS232 Interface 3.1 General rules The DH Sample Changer has a remote control facility that allows its control via TiNet. The parameters of the Sample Changer may be easily set by the method editor of TiNet. The following description offers special possibilities of low level control via the transfer command of the calculation block of the TiNet method editor. 3.1.
3.2 Remote control commands 3.2 Remote control commands 3.2.1 Overview Object Description Input range Reference & Root à Stirer ³ à .On Stirrer control Switching stirrer $G True, False 3.2.2.1. ditto GoTo à .Vessel Go to position Designation of vessel $G special 3.2.2.2. ditto GoAbove à .Vessel Go to position Designation of vessel $G special 3.2.2.3. ditto GoIn à .Vessel Go into vessel Designation of vessel $G special 3.2.2.4. ditto GoToHome Goes to home position $G 3.2.2.5.
3.2 Remote control commands 3.2.2 Description of the remote control commands 3.2.2.1 Stirer Stirer.On &Stirer.On"True";..$G &Stirer.On"False";..$G $G True, False Switching the stirrer on. Switching the stirrer off. 3.2.2.2 GoTo $G GoTo.Vessel 1...XXX, Home, Soak, Wash Makro command which moves to the predefined beaker using the speeds from branch "Init" (see 3.2.2.
3.2 Remote control commands Ø - Stirrs during 3 s - Moves up to Z=0, SpeedZFast .Times: The number of washing cycles can be set. If the number is >1, the following additional steps will be carried out (n times); the repetitive steps beginning at the marked position Ø in the sequence: - Moves up to Z=0, SpeedZFast - Switches pump on - Moves down to Zmax., Speed Zslow - Switches pump off 3.2.2.7 SetCtrlLine $G SetCtrlLine.On True, False SetCtrlLine.Line 1...3 A remote control line can be set.
3.2 Remote control commands 3.2.2.11 Assembly.GoToXYZ $G Assembly.GoToXYZ.X 0...630 Assembly.GoToXYZ.Y 0...272 Assembly.GoToXYZ.Z 0...120 Assembly.GoToXYZ.SpeedXY 0...3...7 Assembly.GoToXYZ.SpeedZ 0...3...7 Moves to the predefined position. The above speeds are only valid for Assembly commands. The extreme positions which are still in the moving range of the Sample Changer are given in the corresponding rack definition file (..\bin\PW74xDef\748*r.def of your TiNet program).
3.3 Properties of the RS 232 Interface 3.3 Properties of the RS 232 Interface The DH Sample Changer is configured as DTE (Data Terminal Equipment). The RS 232 interface has the following technical specifications: • Data interface according to the RS 232C standard • RS232 parameters: 9600 baud 8 data bit 1 stop bit no parity SW handshake • Control characters: CR (ASCII DEC 13) LF (ASCII DEC 10) XON (ASCII DEC 17) XOFF (ASCII DEC 19) • Cables 6.2125.060 25/25 pol 6.2125.110 25/9 pol length: max. approx.
4.1 Troubleshooting 4 Troubleshooting, remedying faults 4.1 Troubleshooting Problem Possible causes and remedies Beaker detector does not respond although no beaker is present. • Activate beaker detector in program part "Configuration" of TiNet. • Is the beaker detector correctly plugged into the "Auxiliary 1" socket? Rack does not fit on Sample Changer. Loosen wash beaker from below the Sample Changer, set rack onto Sample Changer and screw wash beaker back in position.
4.2 TiNet error messages 4.2 TiNet error messages Problem 18 Possible causes and remedies Invalid head position selected. A rack position has been selected which is not contained in the rack definition file. • Check the selected position. • Have you selected the correct rack in the TiNet configuration? Selected command can't be executed. General communication problem. Exchange the cable. There is no beaker.
4.3 Readjust Sample Changer 4.3 Readjust Sample Changer Sample arm from below with position guide: 1. 2. 3. 4. 5. Load the test software from the Internet: http://www.metrohm.ch Remove the sample racks from the Sample Changer. Install 6.2625.000 position guide on the sample arm instead of the titration head. Place the centering ring over the right-hand side rack bolt. Start the test software which you have loaded from the Internet and follow the instructions which you will also find there.
5.1 Technical specifications 5 Appendix 5.1 Technical specifications Lift Max. lift way Max. load 146 mm 500 g Sample position precision ± 2 mm Sample racks 48 beaker, 250 mL 136 beaker, 75 mL Light metal, powder coated Material Pump Capacity Fuse 0.33 L/min for 100...120 V: T1.25A for 220...240 V: T630mA L Housing Al (antichromed) and stainless steel, powder coated RS232 interface for PC connection Input/output lines for beaker sensor and any other devices Ambient temperature Nom.
5.2 Sample Changer methods 5.2 Sample Changer methods Methods for TiNet and working with the 748 DH Sample Changer are available at http://www.metrohm.
5.3 Pin assignment of I/O sockets "Auxiliary" 5.3 Pin assignment of I/O sockets "Auxiliary" external Input Function +5 V pin 2 Output pin 1 1A 50 V non-inductive 0V Ground 0V pin 5 5-pin DIN plug No liability whatsoever will be accepted for damage caused by improper interconnection of instruments.
5.4 Warranty and certificates 5.4 Warranty and certificates 5.4.1 Warranty The warranty regarding our products is limited to rectification free of charge in our workshops of defects that can be proved to be due to material, design or manufacturing faults which appear within 12 months from the day of delivery. Transport costs are chargeable to the purchaser. For day and night operation, the warranty is valid for 6 months.
5.4 Warranty and certificates 5.4.2 Certificate of Conformity and System Validation This is to certify the conformity to the standard specifications for electrical appliances and accessories, as well as to the standard specifications for security and to system validation issued by the manufacturing company. Name of commodity: System software: Name of manufacturer: 748 DH Sample Changer Stored in ROMs Metrohm Ltd.
5.4 Warranty and certificates Ionenanalytik • Analyse des ions • Ion analysis • Análisis iónico 748 DH Sample Changer EU Declaration of Conformity The company Metrohm AG, Herisau, Switzerland, certifies herewith, that the following instrument: 748 DH Sample Changer meets the CE mark requirements of EU Directives 89/336/EWG and 72/23/EWG.
5.5 Scope of delivery, accessories 5.5 Scope of delivery, accessories 748 DH Sample Changer............................................................................. 2.748.0010 including the following accessories: 1 Sample beaker, glass, 250 mL ........................................................................... 6.1432.320 2 PE containers, 10 L ............................................................................................. 6.1621.000 1 PVC tubing 4/6, 2m ............................
5.5 Scope of delivery, accessories Options Accessories to separate order and on payment of extra charge: Titration heads, stirrer, buret tips Macro titration head for 250 mL beakers............................................................... 6.1463.000 Micro titration head for 75 mL beakers.................................................................. 6.1463.010 Rod stirrer, PP......................................................................................................... 2.722.
5.5 Scope of delivery, accessories Beakers Sample beaker, 250 mL, glass .............................................................................. 6.1432.320 Sample beaker, 200 mL, PP .................................................................................. 6.1453.220 Sample beaker, 250 mL, PP .................................................................................. 6.1453.250 Sample beaker, 75 mL, glass ................................................................................
Index Index Page numbers in the green part are in italics. Page no. + ff means “and following pages“. A O Accessories ................................................26 Adjustment .............................................9, 19 Appendix ..................................................20ff Auxiliary, pin occupancy ............................22 Auxiliary socket...........................................22 Offset data ............................................. 9, 19 Operation ....................
Index W Warranty ..................................................... 23 Wash position............................................... 4 Washing ....................................................... 7 Waste canister.............................................. 7 Working position .......................................... 4 XY XY direction .................................................. 4 Z Z direction ....................................................
