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Sartorius Portable PT 120-000V1, Service Manual

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WPT5002-e94081

Sartorius Portable und Gold
Service Manual

Summary of Contents for Portable PT 120-000V1

Page 1: ...WPT5002 e94081 Sartorius Portable und Gold Service Manual...

Page 2: ......

Page 3: ...sting the Overload Stop 16 Zero Point Offset Value 17 Checking the Zero Point Offset Value 17 Adjusting the Zero Point Offset Value 18 Off Center Load 18 Checking the Off Center Load 18 Adjusting the...

Page 4: ...4 Exploded View Diagram...

Page 5: ...Top part of the housing 105 Manufacturer s label 106 Strain gauge system 107 Lock nut 108 Data interface 109 Power supply PCB 110 Battery PCB 111 Battery cover 112 Battery 113 Battery base plate 114 P...

Page 6: ...and all special tools are required Repair attempts by nonauthorized persons must be avoided Repair of the balances scales by anyone other than an authorized SARTORIUS service technician will result i...

Page 7: ...positioned the offset value adjustment or calibration was performed incorrectly the weighing system or A D converter is defective The maximum capacity of the balance scale has been exceeded e g the we...

Page 8: ...g 65 mm 5000 g 80 mm 200 g 35 mm 500 g 47 mm Off center test area up to the edge of the weighing pan Off center tolerance 0 04 g 0 05 g 0 3 g 3 g 0 05 g 0 3 g Zero point offset test weight balance sc...

Page 9: ...ing Menu and Changing Menu Code Settings Please proceed as follows to access the balance scale operating menu Switch balance scale to the STANDBY mode by pressing the key In order to gain access to th...

Page 10: ...ied by o is indicated in the display To set a new menu code for the function you must press the T control as soon as the respective code number is indicated in the display After this the program autom...

Page 11: ...2 12 Grams Tolas o Weighing in Mode activate using F2 2 13 Weighing in with one decimal place 100 0 2 14 Weighing in with two decimal places 100 00 Parts Counting Mode activate using F2 2 15 Ref dete...

Page 12: ...8 Data Output Parameters 8 1 Single print regardles of stability 8 2 Single print at stability 8 3 Auto print regardles of stability 8 4 Auto print at stability 9 Automatic Shutoff Battery Saver 9 1 A...

Page 13: ...on the weighing pan This voltage is transmitted to the summing point of the A D converter via amplifier IC106 low pass filter IC102 and resistor R120 In the A D converter consisting of AD3 IC104 resis...

Page 14: ...balance scale housing left closed Disconnect the balance scale from the operating voltage and remove the weighing pan 101 If the balance scale has a rectangular weighing pan you must first remove the...

Page 15: ...ain access to the gross value mode remove the protective cover 114 located on the front right hand side of the balance scale and push the menu access switch to the left When you turn the balance scale...

Page 16: ...lower overload stop once the load equals the maximum load plus 15 the overload stop must be readjusted If the overload stop 107 is in the correct position you should first check and if necessary adju...

Page 17: ...rance range when the balance scale is unloaded see zero point offset data If the gross value displayed is outside this tolerance range the zero point offset value must be readjusted Zero Point Offset...

Page 18: ...termined with the use of the table to position R130 of the main PCB 118 Afterwards check the zero point offset value again see page 17 Now you can make additional fine adjustments of the zero point of...

Page 19: ...f the weigh pan 0 3 g GT1000B G00V1 1000 g 50 mm up to the edge of the weigh pan 0 15 g GT2100 G00V1 2000 g 65 mm up to the edge of the weigh pan 0 3 g Adjusting the Off Center Load To adjust the off...

Page 20: ...R104 and positive linearity errors can be corrected with resistor R105 Open the balance scale housing see page 14 Locate the position of balancing resistors R104 and R105 on the main PCB 118 see Overv...

Page 21: ...sumed deviation is positive this value applies to R105 Example 2 PT6 000V1 Half load actual value 2499 g full load 2 set value 2503 5 g linearity error 4 5 g For the example 2 given PT6 000V1 linearit...

Page 22: ...10 kOhm 51 kOhm 1 5 MOhm 150 kOhm 4 5 g 4 5 g 360 kOhm 36 kOhm 0 05 g 0 05 g 470 kOhm 47 kOhm 1 3 MOhm 130 kOhm 0 5 g 0 5 g 120 kOhm 11 kOhm 620 kOhm 62 kOhm 470 kOhm 47 kOhm 1 3 MOhm 130 kOhm 5 0 g 5...

Page 23: ...he balance scale e g after adjusting the zero point offset value after exchanging PCBs after exchanging the strain gauge system or after exchanging parameter EEEPROM Calibrating the Balance Scale in t...

Page 24: ...ready to operate Push the menu access switch back to the right and close the opening by replacing the protective cover 114 Calibrating in the Gross Value Mode Turn off the balance scale by pressing th...

Page 25: ...hing pan 101 Shortly thereafter the IC107 microprocessor will accept the calibration weight value and the sign the weight unit symbol g as well as the analog bar graph will be indicated in the display...

Page 26: ...point offset value resistor R104 or R105 for the linearity adjustment If your service workshop is equipped with special tools for exhanging SMD components repair of the PCBs at the component level is...

Page 27: ...ert the membrane covered keypad 120 A into plug in position Bu 8 the strain gauge system connecting cable 106 B into position St 1 the AC power connecting cable 109 A into position Bu 4 and if applica...

Page 28: ...t for a clearance of 0 6 mm between the lower stop 107 A of the strain gauge system 106 and the overload stop lock nut 107 Important Note Preadjustment of the zero point offset value of the new weighi...

Page 29: ...uit board 118 Now perform a complete adjustment of the balance scale Adjust the overload stops see page 16 Adjust the zero point offset value see page 17 Check the off center load see page 18 Adjust t...

Page 30: ...20 V DC approx 4 V D4 Amplifier voltage Digital voltmeter 2 V DC 185 mV 850 mV D5 Low pass filter output Digital voltmeter 2 V DC 185 mV 850 mV D6 Reference voltage Digital voltmeter 20 V DC approx 5...

Page 31: ...SARTORIUS Portable and Gold 31 Overview of the Test Points...

Page 32: ...e balance scale The balance scale is now ready to operate Finally check the data output through the data interface 108 for instance by connecting the data printer YDPO1PT General Specifications Type o...

Page 33: ...ta output only once the weighing system has stabilized an output command will remain stored until the system has stabilized In the auto print setting data output is continuous If you have additionally...

Page 34: ...21 Not Connected Pin 22 Not Connected Pin 23 Not Connected Pin 24 Not Connected Pin 25 5 V Output 1 Pin 16 can be used either as a low signal control output or as a hardware tare command input A corre...

Page 35: ...surface Remove the screw 113 A and remove the battery cover plate 113 from the housing base 115 Disconnect the cable St 4 Bu 4 between the power supply PCB 109 and the main PCB 118 Connect the female...

Page 36: ...tightening the screw 113 A Restore the balance scale to the upright position The balance scale is now ready to operate Important Note After the battery has been installed the balance scale should rema...

Page 37: ...SARTORIUS Portable and Gold 37...

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Page 40: ...y Weender Landstra e 94 108 37075 Goettingen Germany 0551 308 0 0551 308 289 Specifications subject to change without notice Printed in Germany on paper that has been bleached without any use of chlor...

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