I-688 GSE Gas Transmitter Installation, Operation and ... - Brasch
I-688 GSE Gas Transmitter Installation, Operation and ... - Brasch I-688 GSE Gas Transmitter Installation, Operation and ... - Brasch
Target Gas SpecificationsThe Brasch Gas Transmitter is available for monitoring several different target gases. Various regulatoryagencies have determined the threshold concentrations at which these gases become dangerous. BraschManufacturing Company has designed their transmitters so that the measurement ranges for each targetgas meet the agencies’ requirements.Each target gas, for which Brasch currently produces a transmitter, is listed below along with the relevantconcentration specifications.Carbon MonoxideFull Scale Span:Resolution:200 PPM1 PPMNitrogen DioxideFull Scale Span: 10.0 PPM, (BMS); 2.0 PPM, (GDCP-0, 1, 2, 3)Resolution:0.05 PPMOxygenFull Scale Span: 25.0 %Resolution: 0.1 %Description of Front Panel IndicatorsThe only indicator on the transmitter’s front panel is the green power lamp. This lamp glows continuouswhenever power is present.How the Transmitter Senses the Target GasAmbient air surrounding the transmitter contacts the sensor through the sensing port at the top of thehousing cover. Any target gas present in this air causes a response from the sensor. If the transmitter islocated properly, the sensor will respond to the average amount of the target gas present in the area. Forhelp in properly locating the transmitter, please read the mounting guidelines on page 1.The transmitter monitors the actual concentration of the target gas exposed to the sensor. This actual valuemay be different than the time-weighted-average values displayed by most of the personal gas monitors.Please take this difference into account when comparing the response of the two units.Obtaining the Best OperationCarbon Monoxide and/or Nitrogen Dioxide TransmittersThese transmitters are placed in areas to monitor for a rising concentration of the target gas.No two installations will be exactly the same. The number of gas producing sources, air flow patterns insidethe room, the total room volume and the exact location of the transmitter(s) influence how effective each is insensing the target gas concentration.3
In some cases, you may find that a target gas source is too close to the transmitter. Consider othermounting locations for the transmitter, or move the gas source farther away.Oxygen DetectorThis transmitter is placed in areas to monitor for a decreasing concentration of oxygen. Usually a controllerwill respond by activating a ventilation system to bring fresh air, at a normal oxygen concentration, into thearea being monitored. In other instances, the controller may only be used to sound an alarm allowingworkers to evacuate the area.The number of oxygen depleting sources, air flow patterns in the area, the total room volume and thetransmitter location influence the effectiveness of the transmitter.Under most conditions, the only variable that the installer can change will be the location of the transmitter.Please see page 1 for mounting guidelines.Assembly View and Wiring DiagramsThe following assembly view and wiring diagrams should be referenced during installation.Fig. 1: Assembly View: Sensor P.C. Board to Transmitter Cover4
- Page 4: QUICK INSTALLATION GUIDEPlease read
- Page 7: .PART TWO - TECHNICAL SPECIFICATION
- Page 11: Fig. 3: Wiring Diagram, Brasch GSE
- Page 14 and 15: Oxygen DetectorsThe response of the
- Page 17 and 18: PART SIX - APPENDIXModel Numbers an
In some cases, you may find that a target gas source is too close to the transmitter. Consider othermounting locations for the transmitter, or move the gas source farther away.Oxygen DetectorThis transmitter is placed in areas to monitor for a decreasing concentration of oxygen. Usually a controllerwill respond by activating a ventilation system to bring fresh air, at a normal oxygen concentration, into thearea being monitored. In other instances, the controller may only be used to sound an alarm allowingworkers to evacuate the area.The number of oxygen depleting sources, air flow patterns in the area, the total room volume <strong>and</strong> thetransmitter location influence the effectiveness of the transmitter.Under most conditions, the only variable that the installer can change will be the location of the transmitter.Please see page 1 for mounting guidelines.Assembly View <strong>and</strong> Wiring DiagramsThe following assembly view <strong>and</strong> wiring diagrams should be referenced during installation.Fig. 1: Assembly View: Sensor P.C. Board to <strong>Transmitter</strong> Cover4
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