User manual CARLO GAVAZZI MDM 40 TF CONFIGURATION SOFTWARE

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Manual abstract: user guide CARLO GAVAZZI MDM 40 TFCONFIGURATION SOFTWARE

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[. . . ] al1 al2 MDM Digital Meter RPM V F S ENGLISH MDI40. TF Rate meter and controller OPERATING INSTRUCTIONS · General Features · Technical Features · Installation · Preliminary Operations · Front Panel Description · Operating mode 2 3 7 12 13 15 Important: We suggest you keep the original packing for a further shipping of the instrument. In order to guarantee a correct use of the instrument, we recommend the user to carefully read the present instruction manual. CARLO GAVAZZI Instruments Multi-range µP-based panel rate meter MDI40. TF rev. 0 OPERATING INSTRUCTIONS Important: We suggest you keep the original packing for a further shipping of the instrument. In order to guarantee a correct use of the instrument, we recommend the user to carefully read the present instruction manual. [. . . ] If the instrument is equipped with an analogue output, this signal can be transmitted to a paper recorder to show the 21 20 ENGLISH Pu. 2*PS. 2). This result represents the difference between the input channels and can be used when the speed difference between two conveyor belts has to be as low as possible without considering the reference speed of the first conveyor (in any case within a well known value that can be controlled by the available alarm set-point) in order to avoid any transportation problem of the produced goods. F4 : A/B, frequency (speed) ratio mode Input A/B HOLD Input Display mixture deviation that is connected to the quality result of the mixture itself. F6 : 1/A, period or average period mode · if the time base is, for instance, three times the period being measured (see figure below), the updating of the display is made at the end of the time base (end gate time) as average calculation of the measured periods P=(P1+P2+Pn)/n ENGLISH The instrument measures the frequency of input A or input B and executes the following calculation: display=1/(Fa/Pu. 1*PS. 1). The time period is directly connected to the time base that has been programmed in the instrument (for low frequencies or long time periods): · if the time base is in the range of the period being measured (see figure below), the updating of the display is as fast as possible and any period changing is updated immediately on the display; F7 : A, frequency (speed) clockwise and counter clockwise rotation sensing mode. This measuring capability is ideal for monitoring the relative speed of shafts, conveyor belts and other moving machinery taking into account the rotation mode, showing the reverse speed by means of a " - " sign. The rotation sensing is detected by means of a phase difference, measured using the two input channels available as standard in the instrument. If we assume that the channel A is the main channel ( see figure on the next page), the channel B is used to detect if a signal arrives "after" (phase displacement) the signal of the main channel (begin gate time) meaning "clockwise" rotation or "before" meaning 23 22 ENGLISH "counter clockwise rotation". Such kinds of signals are normally generated by standard encoders. · SCA: scaling factor programming menu. This menu allows to scale the input signals coming from both A and B measuring channels in such a way that they can be shown on the display as a rate, a frequency, a period or a speed. The parameters that allow to scale this input signals according to the needs are: Pu. 1 : number of pulses per revolution of the sensor (proximity switch) connected to channel A . PS. 1 : Prescaler channel A stated in the following way: A1*10 b1 . Pu. 2 : number of pulses per revolution of the sensor (proximity switch) connected to channel B . PS. 2 : Prescaler channel B stated in the following way: A2 *10 b2 A2 : 1< A2 < 9999. b2 : -9 < b2 < 9. 25 ENGLISH 24 ENGLISH ENGLISH 1 * 10 -1 (0, 1) min. divisor; 9999 * 10 9 (9999000000000) max. What is the meaning of "pulses per revolution"?It is the number of pulses that are generated by the input connected sensor for every complete revolution (360°) of the wheel or of the drive shaft being detected. First example: if you have to measure a speed of a motor with the following data: motor speed: 800 RPM; pulses per revolution : 1; requested displayed value: 800 RPM; you have to proceed in the following way: calculate the maximum frequency that is given by: "[max. speed (RPM) * pulses per revolution]/60", that takes in our case: "[800 * 1]/60 = 13. 33Hz" ·"InP": to select the proper input range that is connected to the maximum frequency. You have to measure, in our case, 13. 33Hz, therefore the range is "r1" (from 0. 001Hz to 500Hz). With the "r1" range you can easily calculate the minimum speed the instrument can measure and display: "[min. frequency (Hz) * 60] / pulses per revolution" that takes in our case "[0. 001 * 60]/1=0. 06 RPM". · "t. bA": to select the proper time base in order to exploit the maximum performance of the instrument. [. . . ] NOTE: the hysteresis is to be programmed according to the displayed range. This means that the hysteresys must always be much lower than the displayed range. · FiL : filter parameter programming menu. This function allows you to stabilize the instruments digital display, in order to obtain steady readings and better control. The coefficient is given in digits and defines the range in which the filter works, programmable value: 0 < Fi. S < 9999 The programmable numerical value represents the fluctuation range of the value which has been measured and displayed by the instrument. [. . . ]

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