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Фрагмент инструкции
The instrument has two simple operator controls. A digital meter, an alphanumeric display, and a sample flowmeter give the operator constant feedback from the instrument. See Figure 1-1. The controls are described briefly here and in greater detail in chapter 4. Figure 1-1: Model 3020T Controls, Indicators, and Connectors Teledyne Analytical Instruments 1 Introduction Model 3020T 1.5.1 UP/DOWN Switch Functions: The UP/DOWN switch is used to select the function to be performed. Choose UP or DOWN to scroll through the following list of eleven functions: • Auto-Cal Set up an automatic calibration sequence. • PWD Install a password to protect your analyzer setup. • Logout Locks Setup Mode. • Version Displays model and version of analyzer. • Self-Test Runs internal diagnostic program, displays results. • Span Span calibrate the analyzer. • Zero Zero calibrate the analyzer. • Alarms Set the alarm setpoints and attributes. • Range Set up the 3 user definable ranges for the instrument. • Contrast Allows adjustment of LCD contrast. Contrast Function is DISABLED (Refer to Section 1.6) • Standby Leaves analyzer powered, but no outputs or displays. WARNING:THE POWER CABLE MUST BE DISCONNECTED TO FULLY REMOVE POWER FROM THE INSTRUMENT. Subfunctions: Once a Function is entered, the UP/DOWN switch is used to select between any subfunctions displayed on the VFD screen. Parameter values: When modifiable values are displayed on the VFD, the UP/DOWN switch can be used to increment or decrement the values. 1.5.2 ESCAPE/ENTER Switch Data Entry: The ESCAPE/ENTER switch is used to input data, from the alphanumeric VFD screen into the instrument: • Escape Moves VFD display back to the previous screen in a series. If none remains, returns to the Analyze screen. • Enter With a Subfunction Selected: Moves VFD display on to the next screen in a series. If none remains, returns to the Analyze screen. With a Value Selected: Enters the value into the analyzer as data. AdvancesVFD to next operation. (See Chapter 4 for details.) Teledyne Analytical Instruments Trace Oxygen Analyzer Introduction 1 1.5.3 Displays Digital Meter Display: The meter display is a LED device that produces large, bright, 7-segment numbers that are legible in any lighting. It produces a continuous readout from 0-10,000 ppm and then switches to a continuous percent readout from 1-25%. It is accurate across all analysis ranges without the discontinuity inherent in analog range switching. Alphanumeric Interface Screen: The VFD screen is an easy-to-use interface from operator to analyzer. It displays values, options, and messages that give the operator immediate feedback. Flowmeter: Monitors the flow of gas past the sensor. Readout is 0.2 to 2.4 standard liters per minute (SLPM). 1.6 Recognizing Difference Between LCD & VFD LCD has GREEN background with BLACK characters. VFD has DARK background with GREEN characters. In the case of VFD -NO CONTRAST ADJUSTMENT IS NEEDED. 1.7 Equipment Interface 1.7.1 Electrical Connector Panel The electrical connector panel, shown in Figure 1-2, contains the electrical connections for external inlets and outlets. The connectors are described briefly here and in detail in the Installation chapter of this manual. CAUTION: The power cable must be disconnected to fully remove power from the instrument. Access: To access the electrical connector panel, or the sensor block, the control panel doubles as a door that can be unbolted and swung open. Electrical Connections: The electrical connections on the electrical connector panel are described briefly here, and in more detail in chapter 3 Installation. • Power Connection 115 or 230 V dc, 50 or 60 Hz. • Analog Outputs 0-1 V dc concentration plus 0-1 V dc range ID, and isolated 4-20 mA dc plus 4-20 mA dc range ID. Teledyne Analytical Instruments 1-6 1 Introduction Model 3020T Teledyne Analytical Instruments • Alarm Connections 2 concentration alarms and 1 system alarm. • RS-232 Port Serial digital concentration signal output and control input. • Remote Valves Used for controlling external solenoid valves, if desired. Figure 1-2: Electrical Connector Panel 1-7 Trace Oxygen Analyzer Introduction 1 Teledyne Analytical Instruments • Remote Sensor Used for external sensor and thermocouple, if desired. • Remote Span/Zero Digital inputs allow external control of analyzer calibration. • Calibration Contact To notify external equipment that instrument is being calibrated and readings are not monitoring sample. • Range ID Contacts Four separate, dedicated, range relay contacts. Low, Medium, High, Cal. • Network I/O Serial digital communications for local network access. For future expansion. Not implemented at this printing. 1.7.2 Gas Connector Panel The gas connector panel, shown in Figure 1-3, contains the gas connections for external inlets and outlets. Those that are optional are shown shaded in the figure. The connectors are described briefly here and in detail in the Installation chapter of this manu...