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Hersteller: Sierra Monitor Corporation Dateigröße: 207.76 kb Dateiname: Unterrichtssprache:

Remote Alarm Available If a remote alarm is desired, Sierra Monitor’sAlarm Panels, the Model 2102 Dual Channel Alarm Panels can be connected up to 500 feet away from the monitors. 2050/2060 Gas Monitors (5/04) Page: Instruction Manual 2.0 QUICK START 2.1 Overview The Gas Sensor Module has been supplied factory calibrated and ready for immediate installation and operation. An installer familiar with installation and operation of gas detection products can use this section to begin immediate use of the monitor. 2.2 Wiring Each module requires four-conductor wiring (two wires for power and two wires for the signal). 2.2.1. Model 2050-2060 Series The Model 2050-2060 series are designed to mount on any indoor vertical surface. Mount the monitor in the desired location. -The installation must meet any hazardous environmental codes for AC/DC electrical instrumentation. 2.2.2 Wiring Connection Terminal positions on the electronics board are as follows: Terminal Function TB1-1 + VDC (9 – 24) TB1-2 GND (0VDC) TB2-1 Relay NC (Normally Closed) or Output to Model 2102 Safe TB2-2 Relay Common TB2-3 Relay NO (Normally Open) or Output to Model 2102 Alarm Table 2.1 2.2.3 Start-up & Operation To begin operation of the Gas Sensor Module provide 9 - 24 VDC from a regulated power supply such as one of the Sierra Monitor Alarm Panels, 2102-XX. Each time the sensor module is powered up it will perform a warm-up for 2 - 60 minutes. During warm-up the monitor will, first, cycle through safe/alarm/safe condition at one hertz. This will be followed by a short period of continuous alarm before warm-up is completed. 2.2.4 Configuration The default configuration for each module is to operate with a buzzer and a normally operating open (NOO) relay. The user can change this configuration using the jumpers provided. Refer to table 6.2. Page: 3 2050/2060 Gas Monitors (5/04) Instruction Manual 3.0 OPERATION 3.1 Introduction Under normal conditions the gas sensor module does not require operator or technician intervention. The following are conditions under which the module requires attention: -Routine periodic calibration -Sensor replacement on a planned schedule or when a sensor failure occurs. - Periodic cleaning as necessary. 3.2 Alarms Three alarm conditions are possible. These can be detected visually at the optional Sierra Monitor controller and at the module. Warm-Up Alarm Oscillating (On/Off) contact closure and “red/ green” visual indication when power is first connected to the module, followed by a continuous closure of approximately 2-60 minutes indicating warm-up. Buzzer Relay Relay Fail Safe On/Off Oscilating Oscilating Gas Alarm Sustained contact closure and solid red light (once the warm-up time is completed) indicating the presence of gas at, or above, the pre-set alarm limit. Table 2.1 Trouble Alarm Interrupted contact closure and “red/green” visual indication (once the warm-up time is completed) after unit has been in operation, indicating either a failed sensor or calibration problems. Buzzer Relay Relay Fail Safe On/Off Oscilating Oscilating 3.3 Outputs For the non-relay configurations a 5 volt DC TTL signal is provided to activate remote alarms such as the Sierra Monitor Alarm Panels. Relay configuration alarm conditions described above are transmitted to the annunciator as relay contact closures from the monitor. The alarm outputs are non-latching closed contacts. As soon as the gas concentration falls below the alarm set-point, the alarm will stop and the alarm output will cause the relay to de-energize and the contacts will open. During warm-up and failed sensor alarms the relays contact and the display LED's oscillate at approximately one hertz. Buzzer Relay Relay Fail Safe On Closed Open = 2050/2060 Gas Monitors (5/04) Page:4 Instruction Manual 4.0 ALARM CALIBRATION 4.1 Factory Alarm Calibration The module has been factory calibrated to alarm as indicated in Table 4.1 and as marked on the calibration label shipped with the module. Model 2050-XX 2060-XX Time Gas cc/min 100 sec. 100 ppm NH3 50 60 sec. 500 ppm R11 50 500 ppm R12 50 50 ppm R22 50 100 ppm R113 50 70 ppm R123 50 50 ppm R134a 50 40 ppm R141b 50 40 ppm R142b 50 40 ppm R500 50 70 ppm R502 50 Table 4.1 4.2 Frequency of Alarm Calibration Check The manufacturer recommends that the calibration of each gas sensor module be verified monthly during the first three months of operation and then quarterly. More frequent checks are necessary during periods of extreme humidity and temperature changes. The monitor should have operated continuously (uninterrupted) for at least 24 hours prior to calibration adjustment. 4.3Alarm Calibration Check Process The output signal of the gas sensor module is calibrated using a calibration gas mixture containing a known concentration of the gas of in...

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