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Julabo MV-12 Manual Download Page 23

MV / MW

23

11.

Electrical connections

 / ALARM connector

The "

  

ALARM

" connector may be used as output for

alarm messages.
Circuit:

Operation

= relay powered

Alarm

= relay not powered

Pin assignment:
Pin 1: 

+24 V (

max. current

 25 mA)

Pin 2:

 0 V

Pin 3: 

Alarm relay

Pin 4:

Reserved - do not use!

Pin 5:

Cooling pulse

RS232C serial interface

This port can be used to connect a computer with an
RS232C cable for remote control of the circulator.

    RS232C

Pin assignments:
Pin 2

RxD

Receive Data

Pin 3

TxD

Transmit Data

Pin 5

0 VD

Signal GND

Pin 6

DTR

Data terminal ready

Pin 7

RTS

Request to send

Pin 8

CTS

Clear to send

Interface correspondence:

Circulator

Computer

Circulator

Computer

  

    

    

9-pole                  25-pole    

  9-pole                 9-pole    

Pin 2 RxD

⇔

Pin 2 TxD

Pin 2 RxD

⇔

Pin 3 TxD

Pin 3 TxD

⇔

Pin 3 RxD

Pin 3 TxD

⇔

Pin 2 RxD

Pin 5 GND

⇔

Pin 7 GND

Pin 5 GND

⇔

Pin 5 GND

Pin 6 DTR

⇔

Pin 6 DSR

Pin 6 DTR

⇔

Pin 6 DSR

Pin 7 RTS

⇔

Pin 5 CTS

Pin 7 RTS

⇔

Pin 8 CTS

Pin 8 CTS

⇔

Pin 4 RTS

Pin 8 CTS

⇔

Pin 7 RTS

Use shielded cables only.

Summary of Contents for MV-12

Page 1: ...19511402 doc Circulators MV 4 MV 6 MV 12 MV 26 MW 4 MW 6 MW 12 MW 26 MW Z 1 951 1402BE2 01 03 ...

Page 2: ... described in this manual may result in a hazardous situation and may void the manufacturer s warranty Transport the unit with care Sudden jolts or drops may cause damages in the interior of the unit Observe all warning labels Never remove warning labels Never operate damaged or leaking equipment Never operate the unit without bath fluid in the bath Always turn off the unit and disconnect the main...

Page 3: ... 3 Setting the temperatures 15 6 4 Warning functions 16 6 5 Setting the safety temperature with shutdown function 17 7 Troubleshooting guide Error messages 18 8 Safety recommendations 20 9 ATC Absolute Temperature Calibration 21 10 Configuration for counter cooling 22 11 Electrical connections 23 12 Remote control 24 12 1 Setup for remote control 24 12 2 Communication with a PC or a superordinated...

Page 4: ...Operating controls and functional elements 4 1 Operating controls and functional elements 5 6 7 9 10 11 12 1 2 3 4 8 14 15 16 20a 13 20b Rear view 20a MV Feed Return 20b MW Suction pump Pressure pump ...

Page 5: ...temperature protection safety temperature 9 MULTI DISPLAY LED temperature indication 10 Cursors left right 11 Edit keys increase decrease setting 12 Enter key store Indicator light Alarm Indicator light Cooling not operational Indicator light Heating 13 Connector alarm output 14 1 5 6 9 RS232C interface 15 Mains fuses fuse holders 16 Mains power cable with plug 20a Pump connectors on MV 20b Pump c...

Page 6: ...uids in a bath tank The main functional elements are the heater circulation pump and control electronics An electronic proportional temperature control PID characteristic adapts the heat supplied to the thermal requirements of the bath Setting is rapid and simple using the keypad with its easy to learn symbols Keypad is splash proof easily cleaned and ergonomically designed The microprocessor tech...

Page 7: ... tubing Operation with flammable bath liquids permitted Recommended bath liquids Bath liquids Temperature range Flash point fire point Thermal M 50 C 170 C 275 C 320 C Thermal H 50 C 250 C 280 C 350 C deionized water 5 C bis 80 C ATTENTION The maximum permissible viscosity is 30 mm2 x s 1 No liability for use of other bath liquids Order No Bath liquid 8 940 100 8 940 101 8 940 102 8 940 103 Therma...

Page 8: ...he volume of bath oils will increase due to thermal expansion when the bath temperature rises Exercise CAUTION when emptying hot bath liquids Draining Press the mains switch to turn the circulator off Place the heating circulator near the rim of the table Use a suitable vessel as recipient for the bath liquid A drain plug is located on the front of the bath tank that is unscrewed to drain the bath...

Page 9: ...130 ml minute MW or 100 ml minute MV is sufficient to compensate for the characteristic temperature By installing the MVS controller 26 and a solenoid valve 27 sudden temperature increases can be rapidly reversed by tap water flowing through the built in cooling coil Low water consumption For applications requiring constant near ambient temperature tap water is only used in small amounts Configura...

Page 10: ...plication in the circulator bath 24a 24b Connecting the external system Unscrew the collar nut from the pump connector 24a Slide the tubing onto the pump connectors for feed and return flow 24a 24b 24a 24b Unscrew the M 16 x 1 collar nuts on the pump connectors pressure pump 24a suction pump 24b with a 19 mm 3 4 wrench and remove the sealing disks Using the collar nuts screw on the tubing connecti...

Page 11: ...evel Adapter is recommended for the external bath tank The flow rate of the pressure pump 24a will be then regulated by a built in float device The liquid level may be changed by a height adjustment on the D S Level Adapter Order No 8 970 410 D S Level Adapter Note If the liquid levels in the circulator bath and the external system are at different heights overflowing must be prevented after the p...

Page 12: ...iers turn the marking of the slide 2 to the desired position Tighten the screw Examples Internal applications in the bath A 100 internal bath circulation for large bath tanks B Reduced internal bath circulation for smooth surface of bath liquid External internal applications C 40 external discharge 60 internal circulation for large bath tanks D 80 external discharge 20 internal circulation for sma...

Page 13: ...git MULTI DISPLAY LED and all indicator lights will illuminate Then the software version example n 1 2 appears The display OFF or r OFF indicates the unit is ready to operate standby mode The circulator enters the operating mode activated before switching the circulator off keypad control mode manual operation or remote control mode operation via personal computer Start Press the start stop key Th...

Page 14: ... the unit must enter a safe operating state after a power failure non automatic start mode This safe operating state is indicated by OFF or rOFF resp on the MULTI DISPLAY LED A complete shutdown of the main functional elements such as heater and circulation pump is effected simultaneously Should such a safety standard not be required the AUTOSTART function automatic start mode may be activated thu...

Page 15: ...indicator light blinks and the value previously set appears on the MULTI DISPLAY LED Use the cursor keys to move left or right on the display until the numeral you wish to change is blinking Use the increase decrease arrows to change the selected numeral 0 1 2 3 9 Press enter to store the selected value example 37 0 C The working temperature is maintained constant after a short heat up time e g 37...

Page 16: ...ars on the MULTI DISPLAY LED Use the cursor keys to move left or right on the MULTI DISPLAY LED until the numeral you wish to change is blinking Use the edit keys to increase or decrease the numeral value 0 1 2 3 9 Press enter to store the value example 39 0 C Setting the low temperature limit Press the key Follow the instructions for example 35 0 C Note The warning functions will only be triggere...

Page 17: ...on Press the key to indicate the safety temperature value on the MULTI DISPLAY and using a screwdriver simultaneously turn the setting screw to the desired value example 50 C Setting range 20 C to 210 C in 2 C steps Recommendation Set the safety temperature at 5 to 10 C above the working temperature setpoint Example Setting the warning functions and the safety temperature t C 39 37 35 20 50 2 Low ...

Page 18: ...e bath tank with the bath liquid The float is defect e g because damaged in transit Repair by authorized JULABO service personnel The safety temperature value lies below the working temperature setpoint Set the safety temperature to a higher value A heat reaction or sudden temperature increase e g caused by an exothermic chemical reaction or by the immersion of preheated samples Set the safety tem...

Page 19: ...figuration Error appears contact an authorized JULABO service station Disturbances that are not indicated Pump motor overload protection The pump motor is protected against overloading After a short cooling interval the motor will automatically start running Mains fuses The mains fuses on the rear of the unit may easily be exchanged as shown on the left Fine fuse T 10 0 A dia 5 x 20 mm Only use fi...

Page 20: ...uous operation Therefore exercise particular caution when touching these parts Exercise caution when emptying hot bath liquids Observe the limited working temperature range when using plastic bath tanks Employ suitable connecting tubing Make sure that the tubes are securely attached Avoid sharp bends in the tubing and maintain a sufficient distance from surrounding walls Regularly check the tubing...

Page 21: ...Atc0 With the edit keys select Atc1 and then press enter Using the cursor keys and the edit keys set the correcting factor example 0 20 C and then press enter Press and at the same time The temperature on the measuring point rises to a temperature of 37 0 C and is indicated on the MULTI DISPLAY LED Note The correcting factor always affects the actual working temperature even if this is set via the...

Page 22: ...ve controller to grounded mains power sockets Turn on both mains switches 3 The unit performs a self test Then CErr is indicated on the MULTI DISPLAY and the red indicator light ALARM illuminates 4 Press enter to confirm the message CErr The display indicates OFF and the indicator light ALARM goes out 5 Select the initialization level by pressing simultaneously the keys and The value last entered ...

Page 23: ...able for remote control of the circulator RS232C Pin assignments Pin 2 RxD Receive Data Pin 3 TxD Transmit Data Pin 5 0 VD Signal GND Pin 6 DTR Data terminal ready Pin 7 RTS Request to send Pin 8 CTS Clear to send Interface correspondence Circulator Computer Circulator Computer 9 pole 25 pole 9 pole 9 pole Pin 2 RxD Pin 2 TxD Pin 2 RxD Pin 3 TxD Pin 3 TxD Pin 3 RxD Pin 3 TxD Pin 2 RxD Pin 5 GND Pi...

Page 24: ...ters Example changing the baud rate Using the arrow keys move the cursor to the desired menu The actual parameter is displayed example br 24 2400 bauds With the up and down arrows change the number to the desired parameter example 4800 bauds The changed numerals are blinking The new parameter is stored in memory by pressing enter Adjustable interface parameters REMOTE 0 keypad control mode 1 remot...

Page 25: ... STOP The circulator is now operated via the computer In general the computer master sends commands to the circulator slave The circulator sends data including error messages only when the computer asks for it A transfer sequence consists of command space Hex 20 parameter the character separating decimals in a group is the period end of file Hex 0D The commands are divided into in or out commands ...

Page 26: ...p_02 xxx x Set high temperature warning limit out_sp_03 xxx x Set low temperature warning limit in_sp_00 none Ask for working temperature T1 in_sp_01 none Ask for working temperature T2 in_sp_02 none Ask for high temperature warning limit in_sp_03 none Ask for low temperature warning limit in_pv_00 none Ask for actual bath temperature in_pv_01 none Ask for the heater wattage being used 12 4 Status...

Page 27: ...king temperature and safety sensors report a temperature difference of more than 25 C 07 I2C BUS WRITE ERROR 07 I2C BUS READ ERROR 07 I2C BUS READ WRITE ERROR Internal error 08 INVALID COMMAND Invalid command 10 VALUE TOO SMALL Entered value too small 11 VALUE TOO LARGE Entered value too large 12 WARNING VALUE EXCEEDS TEMPERATURE LIMITS Value lies outside the adjusted range for the high and low te...

Page 28: ...under normal conditions Periodic maintenance is not required The tank should be filled only with a bath liquid recommended by JULABO To avoid contamination it is essential to change the bath liquid from time to time Repairs Before asking for a service technician or returning a JULABO circulator for repair please contact an authorized JULABO service station When returning a unit take care of carefu...

Page 29: ...0 Safety temperature sensor Pt 1000 Heater wattage 2000 W at 230 V or 1000 W at 115V Pressure pump pressure max at 0 liter 340 mbar 340 mbar 340 mbar discharge max at 0 bar 15l min 20 l min 20 l min Suction pump suction max at 0 liter 220 mbar 220 mbar discharge max at 0 bar 14 l min 14 l min Electrical connections Alarm output 24 0 V DC max 25 mA Computer interface RS232C Ambient temperature 5 C ...

Page 30: ...iters 7 5 12 18 26 Overall dimensions mm 300x410 360x610 WxDxH x450 x450 Weight kg 15 20 Safety Installations DIN 12876 Excess temperature protection adjustable from 20 to 210 C Low liquid level protection float switch Safety class III Supplementary safety installations High temperature warning function optical audible in intervals Low temperature warning function optical audible in intervals Supe...

Page 31: ...tage regulations 73 23 EEC Circulator MV MW This unit is manufactured in compliance with the following guidelines electrical equipment for control technology and laboratory application EMC requirements outlined by EN 61326 safety regulation for electrical devices for measuring control and laboratory application specified by EN 61010 Julabo Labortechnik GmbH Eisenbahnstr 45 D 77960 Seelbach Germany...

Page 32: ... up to 24 months or 10 000 working hours which ever is achieved first To apply for this extended warranty the user must register the unit on the Julabo web site www julabo de indicating the serial no The extended warranty will apply from the date of Julabo Labortechnik GmbH s original invoice Julabo Labortechnik GmbH reserves the right to decide the validity of any warranty claim In case of faults...

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