S4000TH H2S Gas Detector
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H2S GENERAL MONITORS Protection for life. • Event logging • Stores fault, gas check, calibration, and alarm event history • Industry standard output for remote alarm and fault indication • HART and Modbus communication • Provides complete status and control capability in the control room • Wider range of applications • Warning, Alarm & Fault Relays • Provides local alarm capability • Calibration, Calibration Check, Set-up Mode • Simplifies operation and maintenance • Remaining Sensor Life Indication • Reduces downtime by providing an estimate of remaining sensor life • Wireless capability Intelligent Sensor for H2S Gas Detection • Compatible with ELPRO Technologies wireless devices Description The Model S4000TH Intelligent Sensor is a microprocessor-based transmitter designed for use with General Monitors’ Metal Oxide Semiconductor (MOS) sensor. This unit features one person calibration and can virtually self-calibrate by simply activating a magnetic switch and applying gas. It is designed to detect hydrogen sulfide in parts per million (ppm) levels and provide status indication and alarm outputs. All of the S4000TH electronics are contained within an explosion-proof housing so that sensor information can be processed at the sensor site. It provides a 4-20 mA signal which is proportional to 0 to 100% of the detection range at the sensor. In addition, the S4000TH includes warning, alarm and fault relay contacts that can be used to indicate an alarm or fault condition, and dual redundant Modbus or HART communications. Configurations with relays, Modbus and HART are available to meet many needs. The S4000TH includes a three (3) digit LED display. This local digital display continuously indicates gas concentrations during normal operation and in the calibration check mode, calibration prompts during calibration mode, display codes during the setup mode and eight fault codes. The S4000TH has four different operating modes. First, the normal operating mode in which alarms are active and the display and 4-20 mA readings are proportional to the gas concentration at the sensor. Second, the gas check mode that allows the user to apply a gas and check the sensor response while alarm outputs are inhibited. Third, a calibration mode in which gas is applied to the sensor to calibrate the unit. Finally, a set-up mode which allows the user to review or change setup options such as relay settings, sensor range, and Modbus parameters. Selecting Setup Mode on the S4000TH is accomplished by using the magnetic switch, HART or Modbus command. Options • • • • • Sensor Range (0-20 ppm, 0-50 ppm, 0-100 ppm) Energized/de-energized relays Latching/non-latching relays Alarm setpoints for relays Baud rate, data format, and address for each Modbus channel

MODEL S4000TH System Specifications Electrical Specifications Sensor Type: Continuous diffusion, adsorption type Metal Oxide Semiconductor (MOS) Input Power: Sensor Life: Relay Ratings: (optional) 8A @ 250 VAC / 8A @ 30 VDC res. max. (3x) SPDT - Warning, Alarm & Fault ±2 ppm or 10% of the applied gas, whichever is greater Analog Signal: 0-20 mA (650 Ohms max. load) Malfunction 0 mA** Gas Check / Cal 1.5 mA*** Setup mode 1.5 mA*** Zero reading 4 mA+0.2 mA 0-100% scale 4-20 mA Over-range 20-22 mA Response Time: Measuring Ranges: Modes: Classification: CSA/FM T50 < 14 seconds (screen) T50 < 30...