VEVOR ACS-30Ab Manual
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VEVOR ACS-30Ab Manual

VEVOR ACS-30Ab Manual

Electronic price computing scale
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Technical Support and E-Warranty Certificate www.vevor.com/support
ELECTRONIC PRICE
COMPUTING SCALE
MODEL:ACS-30Ab
We continue to be committed to provide you tools with competitive price.
"Save Half", "Half Price" or any other similar expressions used by us only represents an
estimate of savings you might benefit from buying certain tools with us compared to the major
top brands and doses not necessarily mean to cover all categories of tools offered by us. You
are kindly reminded to verify carefully when you are placing an order with us if you are
actually saving half in comparison with the top major brands.

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Summary of Contents for VEVOR ACS-30Ab

  • Page 1 Technical Support and E-Warranty Certificate www.vevor.com/support ELECTRONIC PRICE COMPUTING SCALE MODEL:ACS-30Ab We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only represents an estimate of savings you might benefit from buying certain tools with us compared to the major top brands and doses not necessarily mean to cover all categories of tools offered by us.
  • Page 2 This is the original instruction, please read all manual instructions carefully before operating. VEVOR reserves a clear interpretation of our user manual. The appearance of the product shall be subject to the product you received. Please forgive us that we won't inform you again if there are any technology or software updates on our product.

  • Page 3: Self-Checking

    1. The main function of the electronic scale Electronic counting scales include the following functions; Self-checking; Zero adjustment automatic adjustment; Zero adjustments automatic tracking; Zeros; Tare; AC-DCswitch; Overload alarm; Double-sided digital display, etc. 1.1 Self-checking After startup, SCM first into initial condition, complete initialization work, then came self-checking program, check the stroke segment, a display is complete and zero status is stable in weight, self-checking window, and all display "88888".

  • Page 4: Overload Alarm

    ACS-30Ab 5g) for. 1.4. Zeros Zeros range: ACS - type A scale when weighing less than full scale stage to 3% of the weighed 15Kg scales, for 450g. 1.5. Tare The ACS - Series tare range from 0 to 100% full weight, 15Kg tare values is 15Kg.

  • Page 5: Instrument Parts

    2.Electronic scales working principle and circuit structure The ACS -Series scale including sensor, amplifiers, A/D converter, CPU processor and keyboard, monitor, etc, the working principle diagram below: Figure 1 When the weight on the scale of the plate after the resistance strain type weighing sensor, thus bridge road produced deformation output dc signal (mv level), DC signal size and weight is proportional to the particle weight by the pre-amplifier amplifier, into A/D converter into the digital quantity by the CPU, the...
  • Page 6 2.1.2 Sensor work principle U is input voltage accuracy of 1 ‰, 5V fluctuations, U1, for output signal voltage signal and R1R2R3R4 microvolt level since compensation for the strain gauge for modulus compensation, Rm1Rm2 piece, Rb1Rb2 for modulus coefficient compensation resistance when U0 input 5V RmRb after there in the voltage of 0.5 V voltage gives way, so add in bridge the voltage of 4.5 V or so, when no stress 0V output V CD should in theory, general factory index 100UV in Vcd output 0 + R1R2R3R4 force, when sensor changes after a bridge circuit with...
  • Page 7 By OP07 IC3, preamplifier amplifier, magnification Ω) by E1 (MIT $50K output resistance and sensor in ChengPan decision, no weight, amplifier output voltage 2.5 V, the capacitance for C1, C3 C20, filter capacitance, eliminate the jamming signal of the sensor. 2.2.2 A/D converter A/D converter IC4, 74HC4051 by eight analog switches;...
  • Page 8 31 feet EA/VDD program storage area choice/an EPROM programming power supply 32-39 feet P00 - P17 I/O port 40 feet VCC mains 5V 2.4. Drive display section 2.4.1 LCD display Display of HT1621 drives partly by. Through 89C52 (CPU) by the jammer P22 sends out signals, HT1621 drive lit by the LCD panel.

  • Page 9: Maintenance Points

    3.Maintenance points 3.1 Power circuit of the fault When after startup, displays don't show up at the buzzer, first check the power of work ever, first check normal digital part 89c52 40 feet power source, whether 5V, if not normal check whether REG1, 3 feet, if does not normally check 5V REG1, 1 foot, then check should be 9.0 V R0 D5 diode, whether good, if does not normally check whether 7810,3 feet 10V, D1, D2, D3 D4 bridge road, input and output is normal, and power plug is inserted, fuse, ordinal check whether...
  • Page 10 integrators in overload, thus cause overload phenomenon. 3.2.3 fault phenomena: boot self-inspection show "HH after -". If there was ChengPan should remove heavy weights, try again after all, as reappear afore-mentioned phenomenon; A. check amplifier normal no, 2.3.6 feet are the IC3 2.5 V, when ChengPan after aggravating content on 3 foot two foot and input voltage change, between six feet output voltage increase, normal, or doubt the IC3 has a problem, or other lines to its influence.
  • Page 11 3.3 digital parts fault Digital part including CPU, keyboard, display parts. 3.3.1 fault phenomena: boot self-inspection buzzer always call, after FULL "show" Analysis: such as check sensor, amplifiers, static job electricity average normal, May 24c02 fault, because 24c02 caused by the CPU read data in calculating appeared after spill so appear afore-mentioned phenomenon.
  • Page 12 sensor IN + and RI suspended or 5V, between voltage amplifier overload, so it is always, buzzer solution: sensor 5 thread one-to-one, socket weld found may also cause disconnected. 4.PCB simple maintenance method Fault reasons 1 button is bad. The keyboard thrust line is loose. 2 digits lose not into the replacement 89C52, keyboard change, film plug virtual welding, insert 89C52 connection position impassability.
  • Page 13 17 boot no voice buzzer bad Jump C52 bad 4051,89 18 figures. 19 low voltage no alarm R21, R28 R27, R29, bad. 20 cannot calibrate sensor overload or bad. 21 garbled 24C02 bad. 22 burn transformer D1, D2, D3 D4 diode, bad. 23 weighing no reaction, REG2 bad fall sensor line, IC4, C9 IC3, bad.
  • Page 14 6. If stuck in power, electronic communication lines and electronic scale still alarm "didi..." called. Explanation: ac not inserted; carefully check exchanges, such as checking whether bright light is bright; please change cables or change the power outlet and try again. 6.PACKING LIST ELECTRONIC PRICE COMPUTING SCALE *1 User Manual *1...

  • Page 15: Matters Needing Attention

    Matters needing attention Put scale flat on the table. Adjusting the four foot nuts makes the level of  bubble in the center of the level and try to ensure that the Electronic Price Computing Scale can work in a horizontal state in order that the accuracy of weighing.
  • Page 16 Technical Support and E-Warranty Certificate www.vevor.com/support Made In China...

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