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6-2 Pressure parameter calibration

Pressure parameter calibration should calibrate zero first then span, this sequence can not be reversed.

(1) Multimeter connects with J6 pin S and G on main control board, refer to fig 6

‐

5, adjust side Z until the

output voltage is 10 mV . This operation process is zero calibration

Fig

6-5 Wiring layout for pressure calibration

(2) Connect J6 pin G and J with a mini jumper, adjust side S until the output voltage is 4.00 V then entering

setting interface and press button RP, refer to fig 6

‐

4, finally click button OK to save calibration value. If the

value displayed on screen is not right, pressure parameter should be calibrated again.

7 Wiring diagram

Содержание TOPEX

Страница 1: ...cess of maintenance Before troubleshooting maintenance engineer should be familiar with instrument wiring diagram fully understand the components work voltage and working mechanism Please give special...

Страница 2: ...0 3 8 Turntable motor replacement 21 3 9 LCD replacement 23 3 10 Built in camera and monitor replacement 24 3 11 LED backlight replacement 26 3 12 Push style electromagnet replacement 26 4 Trouble sho...

Страница 3: ...ure Microwave can only be generated when the real time temperature is not beyond setting value 1 4 Safety standards Troubleshooting should not be dealed with power on please refer to the following rul...

Страница 4: ...er to fig 2 2 Fig 2 2 Fuse holders We define the above thyristor belongs to fisrt group and the bellow one belongs to the second group Other components like magnetrons high voltage items can be define...

Страница 5: ...3 4 LED light 00cz021 5 Pressure plate 26aa015 6 PCB board Built in monitor 7 monitor 00fa704 8 Power PCB Built in monitor 9 Holder 26aa014 10 TOPEX service manual 2 3 Bottom view Fig 2 3 bottom compo...

Страница 6: ...11 2 4 Main control board layout No Describe Inventory code 5 Photoelectric sensor 26tj205 6 bracket 23aa020 7 bracket 09aa042 12 TOPEX service manual...

Страница 7: ...ce of the magnetron Note Exhaust duct is mounted with magnetron please don t take down when replace the magnetron Fig 3 2 magnetron The second magnetron The first magnetron Nuts Exhaust duct Temperatu...

Страница 8: ...like fig 3 8 take down four fixed nuts and disconnect the cord We can do replacement process Two HV transformers are installed as the same way Wiring layout We normally do not stipulate the input wiri...

Страница 9: ...tor its conductive feature is controlled by signal Control signal is afford from JP4 15 20 pins pin 15 17 and 19 belong to the first thyristor pin 16 18 and 20 belong to the second one the range of co...

Страница 10: ...ng silicone 4 Remount the exhaust fan fixed by three M5 nuts refer to fig 3 16 5 Restore wiring connection Fig 3 17 Sealing silicone Fig 3 18 Connection bracket Exhaust fan wiring diagram 20 TOPEX ser...

Страница 11: ...nuts Turntable motor is a subassembly gathered with metal bracket photoelectric sensor and grating Note 1 Instrument should be overturned take down the black cover 2 Take the turntable and vessels out...

Страница 12: ...ed by four M3 6 screws data communication type is serial communication via a LCD connector connected with main control board refer to wiring diagram There are four points need to pay more attention wh...

Страница 13: ...ionship is described like fig 3 30 Fig 3 30 Monitor screen subassembly Note Monitor and its PCB connection style is push pull way strange form LCD refer to fig 3 31 Fig 3 31 Push pull style 26 TOPEX s...

Страница 14: ...fan does not work Replace related temperature Temperature value unstable Microwave interference Temperature socket loosen Temperature sensor Main control board error Check door gap Re mount the temper...

Страница 15: ...board error Increase setting value Replace main control board Warning Turntable fault Photoelectric sensor fault Main control board error Turntable motor fault Replace Photoelectric sensor Replace mai...

Страница 16: ...rowave power match Thyristor can not control its output voltage may cause this fault there are three cause reasons 1 Power control signal afford by main control board is error 2 Thyristor is broken 3...

Страница 17: ...at is gray status represents lowercase and highlight represents uppercase refer to fig 6 2 and 6 3 Fig 6 2 Lowercase status Status button 34 TOPEX service manual Fig 6 3 Uppercase status Fig 6 4 Tempe...

Страница 18: ...l the output voltage is 10 mV This operation process is zero calibration Fig 6 5 Wiring layout for pressure calibration 2 Connect J6 pin G and J with a mini jumper adjust side S until the output volta...

Страница 19: ...Preekem Scientific Instruments Co Ltd No 2 Building No 4299 Jindu Road Shanghai 201108 China Tel 86 021 5442 7057 Fax 86 021 5442 7063 E mail Support preekem com Service manual Ver 1 0...