Évaluations - 5, GPA: 4 ( )

Fabricant : Omega Taille : 1.25 mb Nom Fichier : Langue d'enseignement:

INPUT/READING RESOLUTION SUBMENU: Press a 9) Display flashes previous selection of LO Low or HI High resolution. Press d 10) Scroll through the available selection LO or HI (flashing). Press d 11) Display shows STRD stored message momentarily and then advances to BUTN Button Selection Submenu. If LO Low Resolution was selected the resolution of the display is 10 .V. If HI High Resolution was selected the resolution of the display is 1 .V. In case of High Resolution, the maximum input signal is 10 mV. 18 BUTTON SELECTION SUBMENU: Press d 12) Display flashes previous selection of GROS Gross or PEAK Peak. Press b 13) Scroll through the available selection GROS or PEAK to the selection of your choice. Press d 14) Display shows STRD stored message momentarily and then advances to RDG Reading Configuration Menu. If GROS was selected, in the Run Mode pressing b button causes the display to flash Gross value (value measured without zeroing of the display). If PEAK was selected, in the Run Mode pressing b button causes the display to flash Peak value. 0 - 20 mA current input used for process control only. For 4 - 20 mA Input select 0 - 20 mA and adjust the Input/Reading accordingly. To adjust 4 - 20 mA input, see example under INPUT/READING Submenu. 3.2.5 Reading Configuration Menu It is required that you put the controller in the Standby Mode for any configuration change other than Set Points & Alarms. Figure 3.4 Flow Chart for Reading Configuration Menu 19 ENTER READING CONFIGURATION MENU: Press a 1) Press a, if necessary, until CNFG prompt appears. Press d 2) Display advances to INPT Input Menu. Press a 3) Display advances to RDG Reading Configuration Menu. Press d 4) Display advances to DEC Decimal Point. DECIMAL POINT SUBMENU: Press d 5) Display flashes previous selection for Decimal location. Press b 6) Scroll though the available selections and choose Decimal location: FFFF, FFF.F, FF.FF or F.FFF Press d 7) Display shows STRD stored message momentarily only, if changes were made, otherwise press a to advance to LOAD Known/Unknown Loads Submenu. Decimal Point is passive. KNOWN/UNKNOWN LOADS SUBMENU: Press d 8) Display flashes previous selection of ENBL Enable or DSBL Disable. Press b 9) Scroll though the available selection of ENBL or DSBL (flashing). Press d 10) Display shows STRD stored message momentarily and then advances to L.PNT Linearization Points Submenu. If ENBL Known Loads scaling method was selected, calculate the input values to the instrument based on the actual signal being received. If DSBL Without Known Loads scaling method was selected, calculate input values to the instrument based on the transducer specification. LINEARIZATION POINTS SUBMENU: Press d 11) Display flashes previous selection of Linearization Points Submenu. Press b 12) Scroll though the available selections: 0002, 0003, 0004, 0006, 0006, 0007, 0008, 0009, 0010 - up to 10 Linearization Points can be selected. Default is 0002. If display flashes NONE, your instrument has only 2 linearization points. Press d 13) Display shows STRD stored message momentarily only, if a change was made, otherwise press a to advance to the FLTR Filter Constant Submenu. Linearization Points allow users to customize the Transducer curve. 20 FILTER CONSTANT SUBMENU: Press d 14) Display flashes previous selection for Filter Constant. Press b 15) Scroll though the available selections: 0001, 0002, 0004, 0008, 0016, 0032, 0064, 0128. - Default is 0004 Press d 16) Display shows STRD stored message momentarily only, if a change was made, otherwise press a to advance to IN.RD Input/Reading Submenu. The Filter Constant Submenu allows the user to specify the number of readings stored in the Digital Averaging Filter. For PID control select filter value 0001-0004. A filter value of 2 is approximately equal to 1 second RC low pass time constant. 21 3.2.6 Input/Reading (Scale and Offset) Menu Input voltage or current can be converted or scaled into values appropriate for the process or signal being measured. So, a reading may be displayed, for example, in units of weight or velocity instead of in amperes and volts. The controller determines scale and offset values based on two user-provided input values entered with the corresponding readings. There are two methods to scale this meter to display readings in engineering units. The first method is to scale with known loads. Do this by applying known loads to a transducer connected to a meter, or by simulating the output of the transducer with voltage or current simulator. The second method is to scale without known inputs. Do this by calculating input values based on transducer specifications and manually entering them through the front panel push-buttons. Example 1: Scaling with Known Loads (On-Line Calibration). When entering the input or reading values, disregard the position of the decimal point. If ENBL Enabled Load Submenu was selected, instrument is ready for scaling with Known Loads method. Apply a known loa...

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