Gram RV-300i Operation Manual
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Gram RV-300i Operation Manual

Rv series
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Summary of Contents for Gram RV-300i

  • Page 3: General Description

    GENERAL DESCRIPTION RV series electronic balances are destined for high accuracy weighing in laboratory practice. RV series balances are equipped with internal calibration system for accuracy control during balance operation. All balances are Metrologically tested. According to an order balances can be calibrated or legally verified.

  • Page 4: Safety Rules

    SAFETY RULES It is necessary to follow safety rules of work with the balance shown below. Obeying those rules is the condition to avoid electrical shock or damage of the balance or connected peripheral devices. • Repairs and necessary regulations can be done by authorised personnel only.

  • Page 5: Technical Data

    TECHNICAL DATA Model RV-300 RV-500 RV-3000 RV-4000 Capacity (Max) 300g 500g 3000g 4000g Min load (Min) 0,02g 0,02g 0,5g 0,5g Reading unit (d) 0,001g 0,001g 0,01g 0,01g Verification unit (e) 0,01g 0,01g 0,1g 0,1g Tare range -300g -500g -3000g -4000g Accuracy class Working temperature +18 ÷...
  • Page 6 RV-3000 and RV-4000 balances: – Pan 2 – Nuts (under pan) 4 – LCD display 5 – Keys 6 – Rotating legs 7 – Water level Connectors view: Printer Feeder or computer ~230V/50Hz Feeder Adjustment RS232C switch RxD (receiver) TxD (transmitter) Case...

  • Page 7: Keys And Indicators

    KEYS AND INDICATORS Description of basic functions for keys and indicators: ® T ¬ - taring (enter mass subtracted from weighed mass)/ confirmation of selected menu options, ® 0 ¬ - zeroing (option), - result printout (transmission), - internal calibration / accelerated options viewing ✣...

  • Page 8: Preparing Working Environment

    PREPARING WORKING ENVIRONMENT +33°C +18°C Location for the balance should be chosen with care in order to limit influence of the factors that can interrupt working balance. This location has to maintain proper temperature for working balance and necessary space for its operating. The balance should stay on stable table made of material that does not influence magnetically on the balance.

  • Page 9: Preparing The Balance To Work

    PREPARING THE BALANCE TO WORK 1. Take the balance, the feeder and mechanical elements of the pan out. It is recommended to keep the original scale package in order to transport the balance safely in future. 2. Place the balance on a stable ground not affected by mechanical vibrations and airflows.

  • Page 10: General Operation Principles

    GENERAL OPERATION PRINCIPLES 1. Weighed sample should be placed in the centre of the pan 2. The balance allows taring in the whole measuring range. To tare the balance press ® T ¬ key (on the left or on the right). Taring does not extend measuring range, but only subtracts tare value from mass value of a sample placed on the pan.

  • Page 11: Internal Calibration

    Steps after start-up of the balance: Tests of electronic components. Test of internal calibration motor test (engine heard). Displaying balance program version. AC-... Starting internal calibration. -CAL - Zeroing the balance. ------- Loading internal weight. LOAD C Zeroing the balance Balance is ready to work.

  • Page 12: Basic Functions

    - When key is pressed, - After defined time interval (for legally verified balances - 2 hours), - After temperature change (for legally verified balances – more than 2 In legally verified balances time interval is set to 2 hours and defined temperature change is 2 C.

  • Page 13: Normal Weighing

    NORMAL WEIGHING When empty 0.00 g indication is different than zero press ® T ¬ key. 43.04 g Weighing result should be read when the indicator " " lights. WEIGHING WITH TARE A balance is equipped with tare 23.13 g equal to its range.
  • Page 14 Case processing data from the balance. GRAM PRECISION offers computer programs to cooperate with balances. Demo versions and program descriptions are available on the website: www.gram.es: Komunikacja – free serial port testing program, ProCell – residual program for cooperation with Microsoft EXCEL and other Microsoft Windows applications (demo version).

  • Page 15: Special Functions Description

    BALANCE COMPUTER Connection cable WD-1 (balance - KAFKA printer): BALANCE PRINTER Setup of printer internal switch – printer AXIS C-001: SW-1 SW-2 SW-3 SW-4 SW-5 SW-6 SW-7 SW-8 SPECIAL FUNCTIONS DESCRIPTION Menu customization function (ACtIV), Removal of all function from menu (dEFAUL). Autozeroing function (AutoTar), Pieces counting function (PCS), Function for setting serial port working (SEndIng),...
  • Page 16 *Depending on scale memory space limitation this function replaces other special function Other special functions may be enabled as an option on customer request (described in additional brochure when ordered). Function menu is displayed after press MENU button. Functions are displayed with increasing numbers: F1-PCS, F2-AUt, etc.
  • Page 17 AUTOZEROING (AUtOtAr) 0.01g When AUtotAr function is activated, a MENU balance automatically keeps zero indication if a pan is empty or if zero indication was acquired by pressing AUtOtAr ® T ¬ key. To leave the function press MENU key, then with ® T ¬ key chose AUt oFF AUtOtAr and AUt oFF .
  • Page 18 PIECE COUNTING FUNCTION (PCS) 12.05 g This function enables to count identical pieces, e.g. turnbuckles or buttons. A measurement is performed in two phases: 0.00 g - first phase - single piece weight calculation on the basis of defined pieces amount (5, 10, 20, 50, 100, 200 or 500 pieces), 23.04 g - second phase –...
  • Page 19 SERIAL PORT WORKING MODE SELECTION The function enables to set the serial 0.00g port working mode. MENU - StAb – transmission after using and indication stabilization, - no – StAb – transmission after using key without stabilization, S EndInG - Auto – after putting and taking off the weighed object without using - Cont.

  • Page 20: Serial Port Parameters Setting (Rs-232)

    SERIAL PORT PARAMETERS SETTING (RS-232) The function enables to set the 0.00g MENU following transmission parameters (standard parameters underlined: - transmission speed (bAud: 1200, rS 232 4800, 9600, ...), - the number of bits in a byte (bit: 7, 8), - parity control (PArItY: 0, 1;...
  • Page 21 ADJUSTING THE BALANCE (Calibr) If balance indications exceed permissible error it is necessary to adjust a balance. To calibrate a balance use calibration weight as stated in Technical Data table (or of better accuracy) with valid calibration certificate. To adjust a balance it is necessary to break protective marks – please contact the nearest service for legal verification in a place of installation or the nearest Measurements Office.
  • Page 22 Operation sequence: Remove a protective mark from a calibration 0.00g switch at the back of a balance. MENU O FF CALIbr Switch to Pr ON position using small screwdriver (signalised on a display). CAL on Press MENU to call special functions. Press ®...
  • Page 23 WEIGHING UNIT SELECTION (UnIt) Use this function to choose weighing 1.60g MENU unit: - carats (1 ct= 0,2 g), - pounds (1 lb=0,454kg), UnIt - grams. The example presents how to set CArAt carats as weighing unit. 8.00 PERCENTAGE WEIGHING FUNCTION (PErCEnt) This function enables to display 0.00 g weighing result as a percentage of...
  • Page 24 WEIGHT SUMMATION (rECIPE) This function enable to weigh few ingredients in one container and to 0.00 g display aggregated ME NU ingredients. The function has the following options: rECIPE -rEC oFF – leave the function and display aggregated ingredients, -rEC on – activate the function, rEC oFF -rEC Con - return to previous series of weighing.
  • Page 25 TARE MEMORIZING FUNCTION (tArE) This function enables to measure gross weight of a sample placed in a container of a known weigh value (stored in the memory) and to display calculated net weight of the sample. Tare value is recalled from the memory with ® T ¬ (or ® 0 ¬ when pan is unloaded).
  • Page 26 FORCE MEASUREMENT FUNCTION (F) Function activation casues displaying 0.00 g ME NU measurement results in force units (mN). Press MENU key . Using ® T ¬ key choose F function, and then F on. Attention: 1mN»0,1019g F on 0.000 FUNCTION FOR MAXIMUM VALUE INDICATION (UP) This function allows holding on display maximum value shown by the scale in a while Before measurement the scale should 0.00 g...
  • Page 27 ANTI-DISTURBANCE FILTER FUNCTION (FILtEr) This function allows using digital filter with 0.00 selected intensivity during weighing. Filter reduces the influence of mechanical vibrations (air blasts, base vibrations) on measurement result. FILtEr Press MENU key and select FILtEr pressing ® T ¬ key. The following options will be shown FIL- 0 successively on display:...
  • Page 28 FUNCTION FOR WEIGHING ANIMALS (LOC) The function allows weighing animal moving on the scale. 0.00g ME NU Press MENU key. When LOC is displayed press ® T ¬ key. The following options appear on display successively: - LOC oFF – out of function, - LOC on –automatic measurement after loading the scale, - LOC Prn –...

  • Page 29: Date And Time Setting (Date)

    DATE AND TIME SETTING (dAtE) 0.00g This function enables to set current MENU date and time of internal balance clock and enable/disable date and time on weighing result printouts. dAtE Options: - dAt oFF – deactivate date printout, - dAt on – activate date printout (using key), dAt oFF -dAt SEt –...
  • Page 30 AVERAGE CALCULATION FUNCTION (AVErAGE) The function allows for calculating average value of performed measurement series. During series of measurements successive results are registered automatically when scale indication is stabilised. 0.00 g Press MENU key and select AUErAG ME NU pressing ® T ¬ key. The following will be shown successively on display: AUErAGE...
  • Page 31 TRESHOLD COMPARING FUNCTION (thr) This function allows comparing weighing result with two programmed reference values: lower and upper threshold. Comparison result is signalled with indicators (MIN, OK, MAX) and sound signal generated when threshold values are exceeded. Operation sequence: Press MENU key and choose thr pressing ®...
  • Page 32 If the comparison result is : - smaller than lower threshold – the scale signals MIN (yellow colour), - between threshold values - the scale signals OK (green colour, with the short sound signal), - greater than upper threshold - the scale signals MAX (red colour, long sound signal). The checkweighing results can be use to control: optical indicator (Indication mode), batching devices (Batching mode).
  • Page 33 Outputs: zero treshold threshold threshold threshold treshold thr I thr I zero treshold thr II thr I thr II thr II zero treshold Level mode: In Batching mode on P1 (thr I) and P2 (thr II) outputs short-circuit impulses appears for time of 0,5s.
  • Page 34 Imax < 25mA Relays output is the open collector transoptor output with load capacity 25mA / 24V. Transmitter inputs must be protected with diodes, e.g. 1N4148. It is advised to use MS3K/P electronic board (sold separately), consisting of RM96P transmitters, with DC24V input voltage and AC250V, 3A output. Important notes: 1.

  • Page 35: Total Weight Function (Total)

    TOTAL WEIGHT FUNCTION (totAL) The function allows calculating total weight for series of measurements, which can be greater than scale capacity. It allows calculating total weight as well as average value. Press MENU key. 0.00 g ME NU When totAL is displayed press ® T ¬ key. The following options appear successively: - tot Prn - report printout without clearing totAL...

  • Page 36: Density Determination (Hydro)

    To leave the function with clearing total register, select total function from menu and choose tot-0 option. When It will cause the scale prints the communicate informing about clearing registers. The form of receipt after each measurement: Date: Time..measurement no weight measurement no...
  • Page 37 Solids density determination This function calculates material density basing on its weight in air and in water using the formula below: 0.000g ME NU hYdro where, m – weigh in air – weight in water - density of liquid hyd on If distilled water is used, enter its exact temperature (accurate to 0,5°C) –...
  • Page 38 To print a density determination report after all necessary measurements, connect a printer to the balance and press P key. A sample for solid mass density determination is shown below: Date: ... Time ... MEASUREMENT NO. = ... WEIGHT in air = ...

  • Page 39: Liquid Density Determination

    LIQUID DENSITY DETERMINATION This function determines liquid density 0.000g basing on plunger weight in air and in ME NU examined liquid with known volume, using the formula below: hYdro hYd on where – plunger weight in air – plunger weigh in a liquid LIquId V –...
  • Page 40 LEAVING THE FUNCTION 6.6635 To stop using the function, follow operation sequence as shown on the picture. LOAD_H In other case the balance begins next density measurement. 0.000g ME NU 0.000g PRINTOUT LAGUAGE SELECTION (LAnGUAG) LAnGUAG function enables to select printouts language (calibration reports, total printouts and hYdro).
  • Page 41 Example of printouts in polish and English language: - calibration report RAPORT Z KALIBRACJI CALIBRATION REPORT NUMER FABRYCZNY FACTORY NUMBER NUMER PROGRAMU PROGRAM NUMBER MASA KALIBRACYJNA PIERWOTNA CALIBRATION PRIMARY MASS MASA KALIBRACYJNA CALIBRATION MASS RÓŻNICA MAS DIFFERENCE MASS - total function report UWAGA ! WYZEROWANIE WARNING! ZEROING REGISTER REJESTRÓW...
  • Page 42 ✣ key causes passage to mass measurement and enables next samples (with other quantity and surface of a single sample) measurement start. STATISTICALS CALCULATIONS FUNCTION (StAt) Attention: Function is available on demand and it replaces other special functions. This function evaluates from series of measurements (max 500) statistical parameters of weighting process.
  • Page 43 0.00 g ME NU 1. Press MENU key. 2. When StAt is displayed press ® T ¬ key. Following options will show successively S tAt on display: StA Prn – monitoring and printout of statistical data, StA oFF – function off, S tA o StA o –...
  • Page 44 Data: Hour..SAMPLES TOTAL MASS AVER MASS LSL - allowable lower value, MIN MASS MAX MASS = USL - allowable upper value, MAX – MIN A, B, C, .. – measurement intervals, ... – amount of measurements in A interval; SREL measurement is in A interval if it is bigger *HISTOGRAM*...

  • Page 45: Troubleshooting And Maintenance

    TROUBLESHOOTING AND MAINTENANCE 1. The balance should be kept clean. 2. Take care that no dirt is between the casing and the pan. If a dirt is noticed, take off the pan (lift it up), clean a dirt and then mount the pan. 3.

This manual is also suitable for:

Rv-500iRv-4000iRv-3000i

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