Model SG1 Portable Single Gas Detector Operator’s Instruction Manual Covers O2, CO, H2S, H2 and SO2 Models DETCON, Inc. 3200 Research Forest Dr., The Woodlands, Texas 77387 Ph.281.367.4100 / Fax 281.298.2868 www.detcon.com June 7, 2011• Document #3734 • Revision 0.
Warranty and Repair Detcon Inc. warrants the Model SG1 series to be free from defects in workmanship of material under normal use and service for two years from the date of shipment. Detcon will repair or replace the defected product during the warranty period at no cost.
Table of Contents Product Specification ------------------------------------------------3 Names and Functions of Exterior ------------------------------4 Start of Operation ----------------------------------------------------5 Operation Method ----------------------------------------------------6 Calibration --------------------------------------------------------------7 Method of Alarm Set-up and Display ----------------------- 9 Applicable Battery and External Pump--------------------- 12 Battery & Sensor
Product Specification Model Measured Gas Measurement Method Principle of Measurement Monitor Alarm Alert Lamp Vibration Alert Power Source SG1-O2 SG1-CO SG1-H2S SG1-H2 SG1-SO2 O2 CO H2S H2 SO2 0~500ppm 0~1,000ppm 0~100ppm 0~200ppm 0~20ppm 0~100ppm 0~20ppm 0~100ppm 0~30% Electrochemical Type Diffusion Type Custom-made Digital LCD 90dB Red LED Vibration Alarm CR2 Applicable Temperature & Humidity -20°C ~ +50°C, : 10% ~ 95% RH (non-condensing) Explosion-Proof EEx ia IIC T4 / IP67 Case Stan
Names and Functions of Exterior 6 3 4 2 1 5 7 8 1. 2. 3. 4. Gas Sensor Buzzer LCD Display Power Key LCD display symbols 4 5. 6. 7. 8.
Start of Operation Instrument Power-On Press Power key for 2 seconds to turn power on. (Power will not be turned on if the Power key is released before 2 seconds) After power-up, a 10 second countdown will be displayed on the LCD screen as the unit is being stabilized and the program enters Gas Detection Mode with alarm sound and vibration. When the unit stabilizes and enters Gas Detection Mode, it will display the icon and gas reading.
Operation Method Detection Mode The unit enters Gas Detection Mode when the power is turned on. Gas Detection Mode displays the concentration of the gas and the remaining battery capacity on the LCD display. It displays the gas concentration of Oxygen as a percentage (%) and toxic gases such as H2S, CO and SO 2 in parts per million (ppm). The unit displays the real-time concentration value and monitors any gas concentration changes.
Calibration Caution: Detcon Inc. performs the initial calibration prior to shipment. An incorrectly calibrated value can reduce the accuracy of the product as the calibrated value is stored in the unit. Calibration, in general, is to be performed monthly or quarterly, and can be adjusted according to frequency of use. Fresh Air Calibration To enter Calibration Mode, press the Arrow key and Power key simultaneously for 3 seconds. CAL will be displayed and the icon will blink.
Caution: Fresh Air Calibration should be performed in an environment of fresh air without any influence of other gases. The calibration is performed on the assumption that the concentration of Oxygen is 20.9%, the Inflammable Gas is 0% LEL and the concentration of Toxic Gas is 0ppm in the fresh air. Accordingly, it is not recommended to perform Fresh Air Calibration in a closed space, and calibration should not be performed where hazardous gases can be inhaled by operators.
Gas Concentration Values for Calibration of Single Gas Gas Oxygen Carbon Monoxide Hydrogen Sulfide Hydrogen Sulfur Dioxide Concentration 0% 100ppm 50ppm 500ppm 10ppm Method of Alarm Set-up and Display Caution: The alarm values of the device are set according to the alarm standards of each gas required by international standards. Therefore, alarm values of the relevant gas can be changed under the responsibility and approval of the administrator of the work site where the unit is to be used.
When the 1st alarm occurs, the operator can acknowledge it by pressing the Power key. Only the alarm sound stops. The LED will stay on until the reading drops below the alarm value. When the 2nd alarm occurs, the operator and workers should promptly leave the work site. The operator can acknowledge the alarm by pressing the Power key in a place where the concentration value of the gas is normal. (The alarm alerts continuously when it does not return to a normal state even if the Power key is pressed.
While in the alarm 1 SET screen, press the Arrow key to select alarm 2. The icon will be displayed and blink. Set alarm 2 using the same method for alarm 1. Pressing the Power key while on the last digit will return to the alarm 1 SET screen. Hold 3 secs 10 secs count down Press the Arrow key 2 times to save the selected values and exit the Alarm Set Mode. A 10 second countdown will initiate and at the end of the countdown, Gas Detection Mode will be entered.
Applicable Battery Caution: It is absolutely prohibited to replace battery in potential explosion areas or dangerous regions. Specification of the applicable rechargeable battery or disposable battery is indicated below. - Disposable Alkaline Battery: 3V lithium CR2 battery A battery with a different specification is not authorized to be used for this unit in dangerous regions. Warning: An explosion can occur when a battery is thrown into a fire or disassembled with force.
Battery & Sensor Replacement When you replace the Battery and sensors of the SG1 unit, you need some tools and components as indicated below. - Tools: Phillips Screwdriver Battery : 3V lithium CR2 battery (Detcon P/N 360-BR0CR2-000) Sensors for replacement : Detcon 37P series (See Parts List) Filters for replacement Warning : - It is absolutely prohibited to replace the battery in potential explosion areas or dangerous regions. - Replacement of components can damage intrinsic safety function.
Operational Flow Chart 14
Notice for User Please use the unit in ranges of applicable temperature, humidity and pressure that are appropriate for the specification of the product. Using the unit beyond this range may cause a malfunction/glitch of the unit. Gas concentration measurement values by the sensor or the unit can vary with respect to the environment at the site (temperature, pressure and humidity).
