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Resumen del manual
The options for this menu item are: • “SIGNAL > SETPOINT” means the limit will activate when the signal is higher than the set point. • “SIGNAL < SETPOINT” means the limit will activate when the signal is lower than the set point. • “SIGNAL INSIDE” means the limit will activate when the signal is in between the set point and the return point. • “SIGNAL OUTSIDE” means the limit will activate when the signal is not in between the set point and the return point. The figures below further illustrate the differences between these settings. Limits SC Series Instruction Manual page 55 Figure 9-2: Limit Operation when LIMIT.ENERGIZE = SIGNAL < SETPOINT Figure 9-3: Limit Operation when LIMIT.ENERGIZE = SIGNAL INSIDE page 56 008-0608-00 Limits9 Limits9 9.3.6 LIMIT.LATCHING Menu Item This specifies whether to latch the activated limit so that only manually clearing the limit will deactivate it. A latched limit can be manually cleared by pressing the [CLEAR] button, sending the “F8” serial communications command, or by using the Function Input #2 (Clear Peak/Valley & Limits pin on the System Connector. See “Function Input Pins” on page 37. The options for this menu item are: • “ON” means that once a signal activates the limit, the limit will remain activated until it is reset. • “OFF” means that the limit will deactivate immediately when the signal crosses the return point. 9.3.7 LIMIT.CHANNEL Menu Item This specifies the channel that is monitored by this limit. 9.3.8 LIMIT.SOURCE Menu Item This designates the data source of the channel monitored by this limit. Each channel has three data sources: the live tracking value (TRACK), its highest value (PEAK), and its lowest value (VALLEY). The options for this menu item are: • “TRACK” means the live tracking value of the channel. • “PEAK” means the highest value of the channel since the peak/valley detector was last cleared. • “VALLEY” means the lowest value of the channel since the peak/valley detector was last cleared. 9.3.9 LEAVE MENUMenu Item When the menu item is displayed, press [ENTER] to leave this menu. Press [EXIT] to return to the RUN mode. SC Series Instruction Manual page 57 page 58 008-0608-00 10Chapter 10 10Chapter 10 l 10.1 Features The Strain-Gage Input channel provides a DC excitation voltage to and accepts millivolt signals from strain-gage transducers. These millivolt signals are digitized, converted into engineering units, and placed into the track, peak and valley data values of the channel. Setup and calibration of the channel can be made manually through the SETUP mode or automatically if the transducers are equipped with Signature Calibration. See “What is Signature Calibration?” on page 14. The analog-to-digital converter input circuit is ratiometric to the excitation voltage, features adjustable digital, low-pass filtering, 12-to 18-bit resolution (depending on the filter setting) and has several different mV/V input ranges. These many input ranges allow ±50,000 count resolution (at the slowest filter setting) across a wide variety of mV/V input ranges. Three methods of calibrating the Strain-Gage Input channel to the transducer are available: known-load calibration, shunt calibration and mV/V calibration. The benefits of each are discussed in “CALIBRATION TYPE Menu Item” on page 67. Two rear panel control inputs can be field-configured for such functions as remote tare, disabling peak/valley detection and clearing the peak/valley values. A voltage or current digital-to-analog output is also provided. Many diagnostic functions are performed automatically to insure correct wiring and operation of the transducer. FP2000 Transducers The Strain-Gage Input channel has its own internal shunt resistor for use in Shunt Calibration. It is not compatible with FP2000 mV/V output transducers that are equipped with “Buffered Shunt Calibration”. If you wish to use Shunt Calibration with an FP2000 transducer, use an FP2000 with Buffered Shunt cal and amplified output (e.g. 5 VDC, 10 VDC or 4-20mA) connected to an SC's High-Level Input channel. Strain- Gage Input Channel SC Series Instruction Manual page 59 page 60 008-0608-00 10.2 Wiring Connect the transducer to a Strain-Gage Input channel by wiring it to the 12-pin connector of that channel. The Customer Information Sheet that shipped with the instrument describes which cards are installed in each channel. The pin-out for this connector is shown on the following table. The Analog Output and Analog Return pins are electrically isolated from all other pins on the instrument. The maximum recommended cable length to a Signature Module is 100 feet [30m]. Figure 10-1: Unamplified Transducer Connection to Strain-Gage Input Channel Table 4-3: Strain-Gage Input Channel Pin Connections Pin Label Function Reference Pin 1 (top) +EXC (+)Excitation 10 2 +SEN (+)Sense 10 3 -SEN (-)Sense 10 4 -EXC (-)Excitation 10 5 +SIG (+)Signal 10 6 -SIG (-)Signal 10 7 +OUT Analog Output 8 8 -OUT Analog Return - 9 +MEM (+)Signature 10 10 ...
Otros modelos de este manual:Otras herramientas - SC1000 (3.11 mb)
Otras herramientas - SC2000 (3.11 mb)