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Summary of Contents for GDS Corp GDS-58BX
- Page 1 Operation and Maintenance Manual GDS-58BX Sample Draw Monitor GDS Corp. 1245 Butler Road League City, TX 77573 409-927-2980 www.gdscorp.com...
- Page 2 GDS-58BX Operation & Maintenance Manual, Revision 1.1 CAUTION: FOR SAFETY REASONS THIS EQUIPMENT MUST BE OPERATED AND SERVICED BY QUALIFIED PERSONNEL ONLY. READ AND UNDERSTAND INSTRUCTION MANUAL COMPLETELY BEFORE OPERATING OR SERVICING. ATTENTION: POUR DES RAISONS DE SÉCURITÉ, CET ÉQUIPEMENT DOIT ÊTRE UTILISÉ, ENTRETENU ET RÉPARÉ...
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Page 3: Table Of Contents
GDS-58BX Operation & Maintenance Manual, Revision 1.1 CONTENTS SAFETY INFORMATION _______________________________________________ 6 PRODUCT OVERVIEW ________________________________________________ 7 HARDWARE _______________________________________________________ 12 INSTALLATION _____________________________________________________ 13 CALIBRATION ______________________________________________________ 17 SETUP AND OPERATION _____________________________________________ 22 MAINTENANCE _____________________________________________________ 27 TROUBLESHOOTING GUIDELINES ______________________________________ 29 SPECIFICATIONS ____________________________________________________ 30... - Page 4 FIGURE 4-1: POWER AND SIGNAL WIRING CONNECTIONS ................14 FIGURE 4-2: RELAY & MODBUS CONNECTIONS.................... 15 FIGURE 4-3: GDS-58BX WITH OPTIONAL MODBUS WIRING JUNCTION BOX (MBJB) ........16 FIGURE 5-1: GDS-58BX CALIBRATION SETUP ....................18 FIGURE 5-2: CALIBRATION FLOWCHART ...................... 19 FIGURE 6-1: GASMAX BX DISPLAY ........................
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Page 5: Safety Information
Important – Read Before Installation Users should have a detailed understanding of GDS-58BX operating and maintenance instructions. Use the GDS-58BX only as specified in this manual or detection of gases and the resulting protection may be impaired. Read the following WARNINGS prior to use. -
Page 6: Product Overview
The GDS-58BX consists of a gas detector coupled with an integrated pump / flow switch and wiring junction box. The Run / Cal valve selects between the sample input and local calibration gas input. The Visual Flow Indicator shows GREEN if flow is OK, and RED if flow is blocked or the pump fails. -
Page 7: Figure 2-2: Gds-58Bx Flow Diagram
Figure 2-2: GDS-58BX Flow Diagram GDS-58BX SENSOR TECHNOLOGY For toxic gases, the GDS-58BX supports a range of electrochemical (“echem”) sensors for toxic gases and oxygen levels. These sensors use chemical reactions to sense the presence of gases such as hydrogen sulfide, sulfur dioxide and others. -
Page 8: Figure 2-3: Gds-58Bx Ambient Air Sampling
The sample pump used on the GDS-58BX can lift liquid water to a height of 15 ft / 5m, and if the end of the sample line is placed in liquid water, the pump will draw water through the inlet filter, flame arrestors, sample pump, flow switch and flow meter and sensor flow cell, resulting in damage to the components. -
Page 9: Figure 2-4: Filter Option #1
GDS-58BX Operation & Maintenance Manual, Revision 1.1 In addition to end-of-line filters & probes, the GDS-58BX offers three choices for inlet filters that are directly integrated into the unit. These filters are mounted on the left side, in-between the flame arrestor and Run/Cal valve. -
Page 10: Figure 2-6: Filter Option #3
Using a GDS-58BX with a #20-0141 Duct Sample Kit simplifies installation, maintenance and calibration and samples a larger cross-section of the duct stream. -
Page 11: Hardware
GDS-58BX Operation & Maintenance Manual, Revision 1.1 3 HARDWARE The GDS-58BX consists of two NEMA 7 explosion-proof enclosures that contain the sample pump and flow switch (left side) and GASMAX DSX gas monitor, sensor, and flow cell (right side). Gas enters the left side enclosure via explosion proof flame arrestors, passes through the flow meter and into the sensor. -
Page 12: Installation
GDS-58BX Operation & Maintenance Manual, Revision 1.1 4 INSTALLATION SELECTING A LOCATION As compared to a fixed-point gas detector, the GDS-58BX sample draw system offers a great deal of flexibility when choosing a mounting location. Consider the following when considering where to install the GDS-58BX: •... -
Page 13: Figure 4-1: Power And Signal Wiring Connections
To access signal and power connections, remove the cover on the wiring junction box mounted on the right side of the GDS-58BX. Power, ground (common) and signal outputs are shown below. Connect power to TB1 pin 1or pin 2 and ground to TB1 pin 5 or pin 6. Additional+24V and Common connections are available for local strobes or horns. -
Page 14: Normally Open
4000 feet without a repeater. For MODBUS data signals, GDS Corp recommends 20GA to 24GA shielded cable. Daisy-chain power distribution may require larger gauge wire since it is critical that the supply voltage for the GDS-58BX at the far end of the string not fall below 22VDC during power-up. Page 15... -
Page 15: Figure 4-3: Gds-58Bx With Optional Modbus Wiring Junction Box (Mbjb)
OPTIONAL MODBUS WIRING JUNCTION BOX [MJBJ] If the GDS-58BX is to be used in a MODBUS daisy chain configuration, GDS Corp recommends the addition of the MODBUS Wiring Junction Box (see Fig. 4-3). This option minimizes the need to access wiring inside... -
Page 16: Calibration
BE SURE TO RETURN THE RUN / CAL VALVE BACK TO THE RUN POSITION ONCE CALIBRATION IS COMPLETE. IF THE VALVE IS NOT SET PROPERLY, THE GDS-58BX WILL NOT PULL GAS FROM THE REMOTE LOCATION AND THERE WILL BE NO INDICATION TO THE USER. -
Page 17: Calibration Procedure
GDS-58BX Operation & Maintenance Manual, Revision 1.1 CALIBRATION PROCEDURE Before beginning calibration, make sure you have the following items: A cylinder of calibration gas, fixed flow regulator and a length of flexible tubing. A cylinder of ‘zero air’ may be necessary if the absence of target gas cannot be confirmed in the sample area. -
Page 18: Figure 5-2: Calibration Flowchart
GDS-58BX Operation & Maintenance Manual, Revision 1.1 Figure 5-2: Calibration Flowchart Page 19... - Page 19 GDS-58BX Operation & Maintenance Manual, Revision 1.1 CALIBRATION PROCEDURE STEP-BY-STEP PROCEDURE Use the NEXT key to exit any menu and show the Main Channel Display for the desired channel. Attach the cal adapter and cylinder or Zero Air to the GDS-...
- Page 20 GDS-58BX Operation & Maintenance Manual, Revision 1.1 If the Zero Air and Span gas response is acceptable, a message will appear asking the user to remove the Span gas and calibration adapter. Calibration will fail if the resting zero value is greater than +5% of scale or less than -5% of scale.
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Page 21: Setup And Operation
6 SETUP AND OPERATION GASMAX USER INTERFACE When power is applied to the GDS-58BX, the display screen will show ‘GASMAX BX” followed by one or two Smart Sensor information screens if the sensor(s) are newly installed. Certain sensors may initially show off-scale high or low values but should quickly return to zero within several minutes if no target gas is present. -
Page 22: Figure 6-2: Gasmax Bx Single Channel Display Sequence
GDS-58BX Operation & Maintenance Manual, Revision 1.1 the Channel / Sensor Info Display. When both channels are active, the NEXT key will scroll thought both sets of displays as well as a Dual Channel Display screen. Note that the trend graph can be programmed to cover intervals as short as 6 minutes and as long as 24 hours. -
Page 23: Figure 6-3: Gasmax Bx Main Channel Display
GDS-58BX Operation & Maintenance Manual, Revision 1.1 Figure 6-3: GASMAX BX Main Channel Display The Trend Graph screen displays a graph of the live gas readings. The scale can be programmed in the System Config menu to cover intervals of 6 minutes, 30 minutes, 60 minutes, 6 hours, 12 hours, and 24 hours. -
Page 24: Figure 6-5: Gasmax Bx Channel / Sensor Info Display
3) Install the sample inlet and exhaust tubing. 4) Set the Run/Cal valve to the RUN position and apply power to the GDS-58BX. Verify that the flow meter shows ~0.5 liters / minute or more. Allow the unit to warm up for the recommended time. -
Page 25: Normal Operation
GDS-58BX Operation & Maintenance Manual, Revision 1.1 NORMAL OPERATION During normal operation, the GDS-58BX display shows the current gas reading and the 4-20mA output will transmit values that represent the % of scale shown on the display. If the sensor malfunctions or the internal microprocessor fails, the display will show FAULT. -
Page 26: Maintenance
The flow switch is sealed and does not have any user-serviceable parts. If water or other liquid enters the GDS-58BX, the flow meter, flow switch and flame arrestors may need to be replaced or cleaned thoroughly. The flame arrestors can be cleaned and dried using compressed air or heat. - Page 27 GDS-58BX Operation & Maintenance Manual, Revision 1.1 STEP 2 1 REMOVE OLD SENSOR BY PULLING STRAIGHT DOWN 2 INSPECT SENSOR FOR SIGNS OF DIRT OR LIQUID 3 CLEAN SENSOR HEAD STEP 3 1 INSTALL NEW SENSOR BY ALIGNING TAB AND PUSHING...
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Page 28: Troubleshooting Guidelines
Sensor reading during span calibration is too low – sensor may be defective. RECEIVING DEVICE (4-20mA) AND GDS-58BX DISPLAYED VALUES DON’T MATCH • Check that zero and full-scale range values match between GDS-58BX and receiving device (controller). • Check for high impedance shorts to ground on 4-20mA wiring. -
Page 29: Specifications
GDS-58BX Operation & Maintenance Manual, Revision 1.1 9 SPECIFICATIONS Model GDS-58BX Sample Draw System Power Input 24VDC ± 5% at < 10 watts (Toxic sensor) 24VDC ± 5% at < 15 watts (GDS-IR sensor) Display LCD with engineering units display... -
Page 30: Modbus Registers
GDS-58BX Operation & Maintenance Manual, Revision 1.1 10 MODBUS REGISTERS MODBUS REGISTERS The GASMAX BX features a set of user-accessible MODBUS registers that provide a snapshot of the gas detector live readings and user configuration, including real-time data, preset zero, span and calibration values, alarm status, relay status and user-programmable text. - Page 31 GDS-58BX Operation & Maintenance Manual, Revision 1.1 Variable Name Alias Read Write Notes SENSOR 1 CONFIG Ch1 Zero Value 31011 32-bit float in engineering units Ch1 Full Scale Value 31013 32-bit float in engineering units Ch1 Alarm 1 Value 31015...
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Page 32: System Config
GDS-58BX Operation & Maintenance Manual, Revision 1.1 Variable Name Alias Read Write Notes SYSTEM CONFIG Device Type 31151 Packed ASCII Characters (2 / register) Identifier 31161 Packed ASCII Characters (2 / register) Serial Number 31171 Packed ASCII Characters (2 / register) -
Page 33: System Events
GDS-58BX Operation & Maintenance Manual, Revision 1.1 11 SYSTEM EVENTS The GASMAX BX includes a non-volatile event log that records channel-specific and system-level events such as alarms, calibration attempts, sensor installation and much more. Events are sourced from three sources. System events are those associated with the device and not any specific channel. - Page 34 GDS-58BX Operation & Maintenance Manual, Revision 1.1 calibration sequence CALS LOW Span calibration failed: Span reading too low CALS HI Span calibration failed: Span reading too high CALS TIM Span calibration failed: Length of time needed to establish the span- calibration reading exceeded the preset limits.
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Page 35: Drawings And Dimensions
GDS-58BX Operation & Maintenance Manual, Revision 1.1 12 DRAWINGS AND DIMENSIONS 20” 5.0” 5.0” 10.5” ¼” Compression Figure 12-1: GDS-58BX Dimensions (Single Toxic Sensor) 20” 5.0” 5.0” 14” ¼” Compression Figure 12-2: GDS-58BX Dimensions (GDS-IR Sensor Page 36... -
Page 36: Figure 12-3: Gds-58Bx Dimensions (Stainless Steel Plate, 1 Sensor)
GDS-58BX Operation & Maintenance Manual, Revision 1.1 21” 21” 19.25” ¼” Compression .50” DIA (4x) 19.25” Figure 12-3: GDS-58BX Dimensions (Stainless Steel Plate, 1 Sensor) Page 37... -
Page 37: Figure 12-4: Gds-58Bx Enclosure Dimensions (Non-Metallic)
GDS-58BX Operation & Maintenance Manual, Revision 1.1 25.6” 10.4” 25.6” Figure 12-4: GDS-58BX Enclosure Dimensions (Non-Metallic) Page 38... -
Page 38: Sample Draw Duct Assembly 20-0141
GDS-58BX Operation & Maintenance Manual, Revision 1.1 13 SAMPLE DRAW DUCT ASSEMBLY 20-0141 Figure 13-1: Sample Draw Duct Assembly Figure 13-2: Sample Draw Duct Assembly Hole Mounting Pattern NOTE: APPLY GASKET SEAL ON FACE OF PLATE WHEN INSTALLING SAMPLE DRAW DUCT ASSEMBLY... - Page 39 GDS-58BX Operation & Maintenance Manual, Revision 1.1 Page 40...
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