Assessments - 3, GPA: 4 ( )

Fabricante : Omega Arquivo Tamanho: 1.2 mb Arquivo Nome : Língua de Ensino:

During Standby Mode, the instrument remains in a ready condition, but all outputs are disabled. Standby Mode is useful when maintenence of the system is necessary. When the instrument is in "RUN" Mode, push d twice to disable all outputs and alarms. It is now in "STANDBY" Mode. Push d once more to resume "RUN" Mode. PUSH d TWICE to disable the system during an EMERGENCY. To Reset the Meter: When the controller is in the "MENU" Mode, push c once to direct controller one step backward of the top menu item. Push c twice to reset controller, prior to resuming "Run" Mode except after "Alarms", that will go to the "Run" Mode without resetting the controller. 4 PART 2 SETUP 2.1 Front Panel Figure 2.1 Front Panel Display Table 2.1 Front Panel Annunciators 1 Output 1/Setpoint 1/ Alarm 1 indicator 2 Output 2/Setpoint 2/ Alarm 2 indicator °C °C unit indicator °F °F unit indicator PV Upper Display shows the Process Value SV Lower Display shows the Setpoint 1 Value a Changes display to Configuration Mode and advances through menu items* b Used in Program Mode and Peak Recall* c Used in Program Mode and Valley Recall* d Accesses submenus in Configuration Mode and stores selected values* * See Part 3 Operation: Configuration Mode The Dual Display model allows the user to observe the Process Value (upper display) and Setpoint 1 Value (lower display) at the same time. 5 Refer to the Quick Start Guide for assembly and disassembly instructions. 2.2 Rear Panel Connections The rear panel connections are shown in Figures 2.2 and 2.3. 6 5 4 6 5 4 6 5 4 3 2 1 3 2 1 8 7 6 5 4 3 2 1 Figure 2.2 Rear Panel Power and Output Connections Figure 2.3 Rear Panel Input Connections Table 2.2 Rear Panel Connector POWER AC/DC Power Connector: All models INPUT Input Connector: All models TC, PR (Process), RTD OUTPUT 1 Based on one of the following models: Relay SPDT Solid State Relay Pulse Analog Output (Voltage and Current) OUTPUT 2 Based on one of the following models: Relay SPDT Solid State Relay Pulse OPTION Based on one of the following models: RS-232C or RS-485 programmable Excitation 6 2.3 Electrical Installation 2.3.1 Power Connections Caution: Do not connect power to your device until you have completed all input and output connections. Failure to do so may result in injury! Connect the main power connections as shown in Figure 2.4. Use copper conductors only for power connections Figure 2.4 Main Power Connections Table 2.3 Fuse Requirement (see specifications) always use a Safety Agency Approved DC or AC source with the same Overvoltage Category and pollution degree as the standard AC unit (90 240 Vac). The Safety European Standard EN61010-1 for measurement, control, and laboratory equipment requires that fuses must be specified based on IEC127. This standard specifies for a Time-lag fuse, the letter code “T”. The above recommended fuses are of the type IEC127-2-sheet III. Be aware that there are significant differences between the requirements listed in the UL 248-14/CSA 248.14 and the IEC 127 fuse standards. As a result, no single fuse can carry all approval listings. A 1.0 Amp IEC fuse is approximately equivalent to a 1.4 Amp UL/CSA fuse. It is advised to consult the manufacturer’s data sheets for a cross-reference. 7 2.3.2 Thermocouple The figure below shows the wiring hookup for any thermocouple type. For example, for Type K hookup, connect the yellow wire to the "2" terminal and the red wire to the "1(-)" terminal. When configuring your controller, select Thermocouple and Thermocouple Type in the Input Type menu (see Part 3). Figure 2.5 Thermocouple Wiring Hookup Table 2.4 TC Wire Color Chart TYPEInput Connector Jacket (external insulation) Terminal 1 (-) Terminal 2 (+) Extension Grade J Red White dark-Brown Black K Red Yellow dark-Brown Yellow T Red Blue dark-Brown Blue E Red Purple dark-Brown Purple N Red Orange dark-Brown Brown R Red Black -Green S Red Black -Green B Red Gray -Black 8 2.3.3 Two/Three/Four-Wire RTD The figures below show the input connections and input connector jumpers (shown in bold lines) required to hookup a 2-, 3- or 4-wire RTD. RTD (1000/500.) 4-Wire RTD (1000/500.) 3-Wire RTD (1000/500.) 2-Wire RTD (100.) 4-Wire RTD (100.) 3-Wire RTD (100.) 2-Wire Figure 2.6 a) RTD-1000 ohm and b) RTD-100 ohm Wiring Hookup 500 ohm Wiring Hookup The two-wire connection is simplest method, but does not compensate for lead-wire temperature change and often requires calibration to cancel lead-wire resistance offset. The three-wire connection works best with RTD leads closely equal in resistance. The device measures the RTD, plus upper and lower lead drop voltage and the subtracts twice the measured drop in the lower supply current lead producing excellent lead-resistance cancellation for balanced measurements. The four-wire RTD hookup is applicable to unbalanced lead resistance and enables the device to measure and subtract the lead voltage, which produces the best lead-resistance cancellation. When configuring your controll...

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