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Instructions for Kele models including: OS-2, Gas and Specialty Sensors, OS-2 Gas and Specialty Sensors, Specialty Sensors, Sensors
kele.com | Kele O2-10 | Gas & Specialty Sensors | Oxygen
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DocumentDocumentOS-2 Wiring and Calibration Instructions 5.109 129.76 4.528 115 2.941 74.70 2.185 55.50 5.936 150.76 2.048 52.01 5.109 129.76 4.528 115 5.118 130 6.436 163.46 6.436 163.46 6.300 160.02 STATUS: Green = normal levels Red = alarm levels SERVICE NEEDED OS-2S Operation The OS-2 has no power switch and is operational whenever it has sufficient operating power. Operational status is indicated by a pair of LEDs on the front cover as shown in the table below: OS-2 Operation Procedure Installation The OS-2 is suitable for indoor use only. Mount the unit as close to the source of potential refrigerant leaks as possible. Some recommended considerations are as follows: 1. Mount the unit with the sensor pointing down. 2. Mount the unit in a location with low vibration. Strong vibration may cause a change in the condition of the internal membrane. 3. The sensor should be mounted 3' to 5' (0.9 to 1.5m) from the floor in equipment rooms or 1' (0.3m) above the floor in refrigeration pits. 4. The OS-2 should cover about 1000-1500 square feet with adequate air movement. 5. Mount at least 5' (1.5m) from the exhaust fan. 6. Verify operation yearly. Note: Make all connections in accordance with national and local codes. Not recommended for MRI rooms. ALARM Relay Connections The OS-2 has a SPDT, dry contact relay output that is accessed at the three-position screw terminal. · The top terminal is the relays NO contact, · The middle terminal is COM (common). · The bottom is the relays NC contact. O2 content (%) 20.9% 19.50% 15 19% 12 14% 10 12% 8 10% 6 8% 4 6% source: excavationsafetynews.com Potential Effects of Oxygen-Deficient Atmospheres Effects and Symptoms (at atmospheric pressure) Normal air Minimum permissible oxygen level Decreased ability to work strenuously. May induce early symptoms in person with coronary, pulmonary, or circulatory problems Respiration increase during exertion Poor judgemnt, lips turn blue Mental failure, fainting, unconsciousness 4-5 minutes -recovery with treatment 6 minutes 50% fatal 8 minutes 100% fatal Coma onset in 40 seconds ALARM NC I COM I NO OUT1OUT1+ PWRPWR+ Power Connection: Use the Wiring Diagram (Figure 5) for reference with the following descriptions. The OS-2 can be powered from 20 to 30 volts AC or DC. The operating power is connected to the four-position terminal connector at the positions marked PWR+ and PWR- on the circuit board. The polarity of the power inputs are only relevant when DC voltage is used to power the unit; if DC voltage is hook up in reverse polarity the unit will not power up, but no damage to the controller will occur. Because the OS-2 uses a non-isolated power supply, a separate power transformer for each unit is the safest configuration when the analog outputs are used. Analog Output Connection: The OS-2 has an analog output option: the analog output is accessed at the 4-position terminal block. Connect to positions labeled OUT 1+ and OUT 1-. The analog output can be configured as voltage or current (refer to Table 3 in the Configuring the Controller section for more information). If the 4-20mA current output is selected, current will flow out of the terminal marked `+' and return through the terminal marked `-'. This is not a loop powered device: do not attempt to power the OS-2 though the 4 20mA (analog output) connection as this will void the warranty and likely damage the unit. Parameter Measurement Range Resolution Operating Condition Accuracy Life Expectancy Storage Temperature Relay Outputs Alarm Threshold Analog Output Voltage Output Current Output Power Power Consumption OS-2 Oxygen Sensor Value 0 25.0% 0.1% Atmospheric Pressure: 811hPa - 1216hPa Temperature: 5°C 40°C Comments No condensation Relative Humidity: 10 90% RH ±1.5% Of full scale AirSense OS-25: 5 years Life expectancy is shortened with exposure to high temperatures, low pressures, extremely dry environments, and high concentrations of O2. AirSense OS-50: 10 years -20°C +60°C Storage at low temperature (in a refrigerator) and low oxygen concentration will prolong the life expectancy of the O2 sensor. Sensor will freeze at temperatures below -20°C and will not function until thawed. Exposure to temperatures above 60°C will damage sensor. 1 SPDT dry contact Rated for 240 VAC, 1A 1% 24% Default: 19.5% See Table 3 Jumper Selectable Minimum Load Impedance (Rmin) Rmin = 100k Maximum Loop Impedance (Rmax) Rmax = 500 20 30 V (AC/DC) 0.3A rms Current Loop Connection The 4 20 mA current loop output appears at the screw terminal connector labeled `OUT+' and `OUT -', located below the power connector and the relay contector. The OS-2 is NOT a loop powered device. Attempting to power the device through the current loop connector will void the warranty and likely damage the unit. The loop current flows out of the upper terminal marked `+' and returns to the lower terminal marked `-`. Because the OS-2 uses a non-isolated power supply, a separate power transformer for each unit is the safest configuration when the current loop output is used. The current-loop outputs from multiple units powered from the same transformer must be connected to fully isolated inputs to avoid potentially destructive current loops. SETPOINT TM O2-25 Oxygen Sensor "UP" "DOWN" Display Setting The display is set to automaticly turn on durning int power up and off after 30 seconds. To turn on the display permanetly 1. Press and hold both the "up" and "down" button the display read "SLP.1" and than releas buttons 2. Press "down" button to read "SLP.0" 3. The display is now permently on 4. To turn the display permently off set the reado "SLP.1" Setting the Alarm Setpoint 1. Press and hold "up" botton on display 2. Display will read SP1 (defult set point is set at 19.5% O2) 3. Press up button to increase set point 4. Press down to decrease set point 5. Caution setting setpoint too low can cause serious health problems or death. Analog TM Digital Control Systems OS-2 Series O2 Monitor REV 1/12/11