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Фрагмент инструкции
Refer to Figure 12, "Controller Functionality" , on page 10 for more information. • Press and hold the Calibration Button to Calibrate and access Main Menu. • Briefly press to make a selection (select YES? ). WARNING: Opening the Controller’s Housing should be avoided when the presence of gas is possible ( when in a hazardous environment) . Do not power up the system, with the Housing removed, unless the area has been de- classified. MLP-A/AR/ST1400-25 Net Safety Monitoring Inc Magnetic Reed Switch The Magnetic Reed Switch is provided to avoid opening the Housing in an environment where gas may be present. The Magnetic Reed Switch functions in the same manner as the Calibration Button but in a non- intrusive manner. Refer to Figure 12, "Controller Functionality", on page 10 for more information. Attached to the side of the Controller is a magnet: • Place and hold the magnet to the Controller’s Housing (10 o’clock position) to Calibrate and access Main Menu. • Briefly place the magnet to the Controller’s Housing ( 10 o’clock position) to make a selection (select YES? ). Power Up Turn power switch On. A 90 second warm- up routine will begin. The display reads Start Delay Millennium Net Safety , Status LED is Red Slow Flash and current output displays 3.0 mA. When power is applied, the system is automatically tested to ensure proper functionality. After warm-up, the Controller will enter normal operation, the display reads %O2, Status LED will Green Blip/blink and analog output will change to 4.0 mA. Current Loop Measurement ( Test Jacks) Use a standard meter to measure current loop during various states. The Controller’s Housing cover must be removed to access the Test Jacks. Refer to Table 2, “Status LEDs, Display Messages and Current Loop, ” on page 11 for a detailed list and Figure 12, "Controller Functionality" , on page 10 for more information. Status LED The Status LED will remain solid, flash, blip and/ or blink, in either Red or Green, to indicate various states. Refer to Table 2, “Status LEDs, Display Messages and Current Loop, ” on page 11 for a detailed list. THE MAIN MENU The Main Menu provides access to various functional settings and viewing of current settings. • Calibrate Sensor - Calibrate sensor. • Review Relay Settings - Review the current Fault, Low and High alarm settings. This is a read only section. • Set Relay Options - Set the Low and High alarm settings. • Select Modbus Options. • Restricted Menu - Select low power options. • Select a display language - English, Spanish or French. Note: The current output will drop to 3.0 mA while in the Main Menu. Accessing the Main Menu There are two ways to activate the Main Menu: • Calibration Button found on the faceplate (the Housing cover must be removed to access) • Magnetic Reed Switch ( a magnet must be used to activate) Main Menu Functionality 1. Ensure that the Controller has been turned on and no fault is present. 2. Hold the magnet against the Reed Switch or press and hold the Calibration Button until the message Switch On displays and the countdown (10 to 0) finishes. 3. An option will scroll across the display followed by the prompt YES? . 4. To select an option, momentarily place the magnet to the Reed Switch or press the Calibration Button at the YES? prompt. 5. If you do not wish to select that option wait until the next option appears and then select YES? . 6. A selection is acknowledged with a flashing YES . 7. If no option is selected, the Controller returns to 0 (normal operation) . MLP-A/AR/ST1400-25 Net Safety Monitoring Inc. STEP 5 — CALIBRATE CALIBRATION PROCEDURE WARNING: The calibration procedure requires about 5 minutes to complete. If gas is not applied at the appropriate time, a calibration failure may occur (refer to "Calibration Failure" on page 14 for specific information) . For accurate performance, the concentration of gas, corresponding to 0 to 25% oxygen is converted to a linear 4 to 20 mA output signal which can be poweredfrom the primary dc supply of the instrument. Power up the unit for at least 4 hours BEFORE first calibration. The following calibration procedure should be followed to ensure an accurate correlation between the 4 to 20 mA output signal and the gas concentration. Calibration Procedure 1. Confirm successful power up of Controller— LED Green Blip/ blink every 2 seconds; no fault indicated. 2. Flow certified ZERO AIR at a rate of 0.5 litres per minute through the calibration cup for 1 minute to ensure clean air environment. 3. Use the Calibration Button or Reed Switch to access the Main Menu and wait for countdown to complete. 4. When Calibrate Sensor YES? displays, use the Calibration Button or Reed Switch to select YES? Selection will be confirmed by a flashing YES . 5. When Apply Clean Air displays apply clean air. 6. When Apply 20.9% O2 displays, apply O2 at a rate of 0.5 litres per minute using the calibration cup. 7. The display will show Calibrating as the internal settings are being modif...
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