Virtual Measurements & Control VC210 Service Manual
Contents
1. button to turn the backlight on or off PRINT Prints and accumulates the current weight then counts the transaction After printing the transaction count nxx and accumulated weight YYYYY will be displayed for 1 5 seconds respectively To clear the transaction count and accumulated weight press the Zero key while the count is displayed e ACC PRINT for accumulative printing of current weight After printing the transaction count nxx and accumulated weight Y YYYY will be displayed for 1 5 seconds respectively To clear the transaction count and accumulated weight press the Zero key while the count is displayed Power Down Timer and Buzzer Setting Insure the calibration jumper is in the Off position default Press the Tare button for 1 5 seconds The indicator will display OFF xx where xx denotes the power down setting 3 10 15 or 30 minutes and 0 to disable Press Print to scroll until the desired setting is displayed then press Mode to accept With the power down time enabled the unit will automatically power down if there is not weight change or key press in the selected period of time The indicator will display bp on or bp off indicating the current buzzer status Press Print to select the desired buzzer mode then Mode to accept The indicator will resume the normal weighing mode Backlight e To toggle the display backlight on and off2. bridge that is proportional to the change in resistance The output signal is amplified and converted into a digital value which is processed into a normalized weight by the microprocessor The weight is then available for indication on the LCD display or output to a recording device Operation Enunciators BAT Battery Indicates low battery STB Stability Indicates the displayed weight is stable GOSS Indicates the displayed weight is the gross value no tare weight subtracted NET Indicates the displayed weight is the net value tare weight is subtracted TARE Indicates a tare value is available ZERO Indicates center zero kg kilograms Indicates the weight displayed is in kilograms 1b pounds Indicates the weight is displayed in pounds oz ounce Indicates the weight is displayed in ounces ct carat Indicates the weight is displayed in carats Buttons ON OFF Turns the indicator on or off A momentary press will turn the unit on when it is powered down To turn the unit off press and hold the ON OFF button for 1 5 seconds the battery charge status will be displayed as a percentage bpt 99 and the unit will power down TARE Establishes the current gross weight as a tare value ZERO Establishes the current gross weight as zero The allowable zero range is 2 of full scale capacity MODE Toggles the weight mode between lbs and kgs if unit switching is enabled Press and hold the Mode
3. SULEIN ONL RET 10 Safety Notice It is important that Virtual Measurements amp Control s equipment is installed and operated in such a way that all applicable safety requirements are met It is your responsibility as a user to ensure that you identify the relevant standards and comply with them Failure to do so may result in damages to equipment and personal injury In particular you should review the contents of the User Guide carefully before installing or operating the equipment This equipment is not designed for placement in hazardous or explosive environments that require Factory Mutual Approval Under no circumstances will the supplier of the equipment be liable for any incidental consequential or special damages of any kind whatsoever including but not limited to lost profits arising from or in any way associated with the use of the equipment or this User Guide Overview The VC 210 weight indicator is microprocessor based featuring High resolution weighing AC or DC power source LCD display e e Low power consumption e Easy operation This makes it an ideal choice for an electronic bench or platform scale Technical Specification Accuracy Class III 5000d Not type approved A D conversion speed 40 samples sec Internal resolution 400 000 counts Maximum displayed resolution 1 15000 Non linear error lt 0 016 F S Transducer input range 1 3 mv v Load Cell Excitation 5 VDC Maximum number
4. press and hold the Mode key for 1 5 seconds Note that enabling the backlight will shorten the battery life Configuration amp Calibration To enter the configuration amp calibration mode Turn off the VC210 and disconnect the AC adapter Remove the four case screws and carefully open the case One case screw is found under the load cell connection panel Find jumper JP1 and move it to the ON position Carefully close the case being careful to not pinch any wiring Secure the case temporarily with one case screw Plug in the AC adapter if necessary Perform the necessary configuration and calibration Return JP1 to the OFF position Carefully close the case being careful not to pinch any wiring Secure the case with the case screws Configuration Turn on the VC210 and wait for the power up countdown to complete Press and hold the Tare key until the display prompts CAL SP Press the Mode key the display will prompt SET Press the Acc Print key to enter the configuration menu The display will prompt d1 xxx or d2 xxx Use the Acc Print key to toggle to the dl setting The d2 xxx selection is reserved for future features To set the primary weight division also referred to as d or Countby press the Print key repeatedly until the desired the weight division xxx is displayed Weight divisions from 0 001 to 50 are available Press the
5. to establish the span calibration point The calibration and the indicator will return to the normal weighting mode Load Cell Connection The load cell connection is made via a round 5 pin quick disconnect Terminate the load cell to the mating connector as indicated 1 Signal 2 Signal 3 AGND shield 4 E S excitation sense 5 E S excitation sense Back solder side View RS232 Connection The RS232 serial connection is made via a female D SUB 9 DB9 connector 12345 OOOO STE Signal direction at device Back solder side View 2 RD receive input 3 SD transmit output 5 SG signal ground 9 SD2 input RS485 and Current Loop Connection The RS485 and current loop connection are made via a male DB15 connector 12345678 00000000 2 485 A 0000000 3 485 B 5 Pin GND 7 Pin I 9 10 11 12 13 14 15 8 Pin I Back solder side View Parallel Printer Connection Centronix The parallel printer connection is made via a male DB25 1 23456789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Back solder side View 1 STRB 2 9 D0 D7 10 12 18 NC 11 BUSY 19 25 SG Battery Installation Remove the battery compartment cover found on the top of the VC210 by pressing on the latching tab and rocking forward Install six AA 5 alkaline batteries noting the battery orientation found inside the battery compartment Replace the battery compartment cove
6. Mode key to accept the value and advance to the next step Do not select a weight division that will cause the scale resolution capacity weight division to exceed 15000 The display will prompt n xxxx where xxxx is the desired weight resolution Display Resolution Capacity Weight Divison If displayed the decimal point is to be ignored i e 12 00 is a display resolution of 1200 To determine the resolution required divide the desired scale capacity by the weight division For example 1 If the weight division is set to 0 1 and a 1000 Ib capacity is desired set the display resolution to 1000 0 10000 1000 0 1 2 If the weigh division is set to 2 and a 5000 Ib capacity is desired set the display resolution to 2500 5000 2 3 Note that if Ib kg switching is to be allowed set the resolution to the kg value To change the resolution 1 Press the Acc Print key repeatedly until the desired digit is flashing 2 Press the Print key repeatedly until the desired number is displayed 3 Press the Acc Print key to advance to the next decade to be changed the Mode key to accept and continue to the next step Re calibration will be necessary if the weight division or resolution values are changed The display will prompt Unt yx where yx represents the unit of measure to be used The unit choices are 1 00 kg only 2 01 Ib only 3 02 oz only 4 03 ct only 5 10 Dual unit of mea
7. Virtual Measurements amp Control VC210 Service Manual Safety IN OU C dem rr cU 2 Technical SpecificatloH siscaseniiessosnipocentetvcusesss pucseonsinusssssysnovcbuecveoesiusnsumivatucssuvasstucivadesxess 3 P quor T Sees fcc EM its Cea ies Case Sec EE E A E E ss ceca ve uae aaa TTE 3 Theory of OPer ANON m 4 OD CP ANON NDERIT ETE 4 IjdTgri cm ioso rrise 4 jn 5 Power Down Timer and Buzzer Setting eere ee eee e eee ee eee ee ene ette enean etna nee 5 Backlight eT XM P 5 Configuration amp Calibration ssssssssssssssesssesssoossoossosessseessosesoossoossoosssseessoessoossoossssssssee 5 erit 6 CaliDVatiOM D Sson 7 Loud Cell Connection uui aset beh RA ak e dure tle Xen ete REs e EOD nc CR READER UR 7 PAPAE CONNOCH OM rede P 7 RS485 and Current Loop Connection eee eee eee e eee ee nnne en nest en netten seta aee 8 Parallel Printer Connection Centronix cccccssssrsrcscccscssssssssccccccccscssssssssccccccscssssssscces 8 Battery Installation S stus Gr pF deh caaccissveavasssasacenapsaecioesdaccasivasuelasacuasiseorivigies 8 AC Operation Battery Char gine isccnccesscosescesssessesssoosessvceersocesrssvecsssovsasiogessevenseeasesens 8 Installation Considerations and ReStrictions sscsscesscsssccessecssscesscessscsssecssscesssoess 8 Warranty
8. cise caution to protect the equipment from electrostatic discharge damage adverse temperature and humidity conditions or physical abuse may void the warranty Under no circumstances will the supplier of the equipment be liable for any incidental consequential or special damages of any kind whatsoever including but not limited to lost profits arising from or in any way associated with the use of the equipment 10
9. of load cells 4 350Q or 10 10000 Power o Six AA alkaline batteries Not included o Internal 6VDC 1 2Ah lead acid re chargeable battery Included AC adapter 12VDC 300mA output Included Display Backlit LCD Six characters o Character height width 22mm 0 88in 10 0 4in Enunciators Low Battery Stable Weight Mode Tare Active Center Zero gt O OOO Power consumption 0 1VA Operating temperature 0 40 C Operating humidity lt 85 Dimensions 210mm 8 4in L x 140mm 5 6in H x 88mm 3 52in W Approx Weight 0 8kg Features Automatic keyboard calibration Automatic power shutdown when not in use extends battery life Vibration filtering provides a stable weight under adverse conditions Automatic lb kg conversion Parallel printer port Supports print features including displayed or accumulated weight RS 232 RS 485 or 20mA current loop Optional Continuous weight output only Auto zero tracking Theory of Operation Transducer Amplifier f LCD displa Power Suppl AA batte Re chargeable battery i 20mA current ring printing RS 232 RS AC DC adapter 485 Keyboard The VC 210 provides a strain gauge transducer with a 5VDC excitation supply The Wheatstone bridge configuration of the transducer s strain gauge provides a resistive change proportional to the force applied A DC output signal is derived from the excitation voltage applied across the
10. r AC Operation Battery Charging Insert the 12V AC adapter jack into the 12V socket on the rear of the indicator Plug the AC adapter into the wall socket INSURE THE AC ADAPTOR IS APPROPRIATE FOR THE SUPPLIED LINE VOLTAGE 120 or 220 VAC The internal battery is charging while the AC adapter is connected Installation Considerations and Restrictions e Avoid installation in direct sunlight Avoid installation in dusty environments Avoid installation in areas where serious vibration is present Do not operate on battery power if the BAT enunciator is illuminated Do not expose the case to strong solvents Do not submerge or soak with water Return all failures to the factory there are no user serviceable parts Warranty Statement Virtual Measurements amp Control warrants your VC210 instrumentation under normal use and service to be free from defects in material and workmanship for a period of twelve 12 months from the date of purchase If your VC210 instrumentation fails to work properly during the warranty period due to a defect in materials or workmanship VMC will either repair or replace it at no charge for labor or materials Replacement units are provided on an exchange basis and will be either new or reconditioned at VMC s discretion Warranty service may be obtained by returning or shipping your faulty unit prepaid and insured to our nearest repair or manufacturing facility Failure to exer
11. sure with kg as primary calibration unit and Ib as secondary unit Press the Acc Print key until the desired y setting is displayed and the Print key until the desired x setting is displayed Press Mode to accept the value and advance to the next setting The display will prompt b xxxx where xxxx is the serial baud rate Press the Print key repeatedly until the desired baud rate is displayed 1200 2400 4800 and 9600 baud are available Press Mode to accept the value The configuration is completed and the indicator will return to the normal weighing mode Calibration Turn on the VC210 and wait for the power up countdown to complete Press and hold the Tare key until the display prompts CAL SP Press the Acc Print key to enter the calibration menu The display will prompt CAL 00 Remove all weight from the scale and press Mode to establish the zero calibration point This display will prompt xxxxx where xxxxx is the weigh value used for the previous calibration o To change the calibration weight 1 Press the Acc Print key repeatedly until the desired digit is flashing 2 Press the Print key repeatedly until the desired number is displayed 3 Press the Acc Print key to advance to the next decade to be changed With the desired calibration weight displayed place the calibration load on the scale Press Mode
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