Model GD-K77D - RKI Instruments

1 RKI Instruments , Inc. 33248 Central Ave. Union City, CA 94587 (510) 441-5656 Model GD-K77D Operator s Manual Part Number: 71-0046 RKRevision: AReleased: 8/23/04 2 Warranty Model GD-K77D Operator s Manual Warranty RKI Instruments , Inc., warrants gas alarm equipment sold by us to be free from defects in materials and workmanship, and performance for a period of one year from date of shipment from RKI Instruments , Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge. This warranty does not apply to those items which by their nature are subject to deterioration or consumption in normal service, and which must be cleaned, repaired, or replaced on a routine basis. Examples of such items are: Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repairs procedures not in accordance with the instruction manual.

2 This warranty indicates the full extent of our liability, and we are not responsible for removal or replacement costs, local repair costs, transportation costs, or contingent expenses incurred without our prior approval. T HIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND REPRESENTATIONS , EXPRESSED OR IMPLIED , AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI I NSTRUMENTS , I NC ., INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE . I N NO EVENT SHALL RKI I NSTRUMENTS , I NC ., BE LIABLE FOR INDIRECT , INCIDENTAL , OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO FUNCTION OR OPERATE PROPERLY.

3 This warranty covers Instruments and parts sold to users only by authorized distributors, dealers, and representatives as appointed by RKI Instruments , do not assume indemnification for any accident or damage caused by the operation of this gas monitor and our warranty is limited to replacement of parts or our complete goods. Absorbent cartridgesBatteriesPump diaphragms and valvesFilter elementsFuses Model GD-K77D Operator s ManualTable of Contents 3 Table of Contents Overview .. 5 About this Manual .. 5 Important Safety Precautions .. 5 Specifications.. 7 Description ..8 Case .. 10 Alarm Lights .. 10 Display .. 10 Flowmeter .. 10 Internal and Back Panel Components .. 11 Block Diagrams.. 12 Important Safety Procedures .. 13 Installation ..14 Precautions.. 14 Wall Mounting the Model GD-K77D .. 15 Removing the Model GD-K77D .. 16 Electrical Connections.

4 16 Tubing Connections .. 22 Operation ..23 Start-up Preparations .. 23 Basic Operation Flow and Operating Modes .. 23 Start Up .. 24 Detection Mode .. 24 Maintenance Mode .. 27 Alarm Test Mode.. 32 Turning Off the Model GD-K77D .. 32 Alarms..33 Alarm Types .. 33 Responding to Alarms .. 34 4 Table of ContentsModel GD-K77D Operator s ManualMaintenance .. 35 Daily Maintenance .. 35 Monthly Maintenance .. 35 Calibration .. 36 Storage .. 39 Replacing Components .. 40 Troubleshooting .. 40 Trouble Alarm: Flickering PW/TR Lamp .. 40PW/TR Lamp Off .. 41 Abnormal Performance.. 41 Unable to Calibrate .. 41 Slow Response.. 41 Disconnected Fuse .. 42 Model GD-K77D Operator s ManualOverview 5 OverviewThe Model GD-K77D has been specially developed for semiconductor gas-leak monitoring and is one of the most advanced units of its kind.

5 It contains a long-life pump and electrochemical sensor to detect a wide variety of semiconductor gasses quickly and reliably. The long-life sensor has a memory so it can be calibrated separately from the monitor, then installed for quick and easy servicing. The Model GD-K77D s narrow footprint and wall mounting bracket permit flexible placement. Built for reliability and ease of use, the Model GD-K77D includes the latest innovations in gas-leak monitoring technology: Digital LED display for readout of gas concentrations Sensor information and calibration stored within sensor memory Several transmission options available Self-diagnostic functions performed by microcomputer Easy replacement of pump and sensor Two alarm levels plus trouble alarmWARNING:The Model GD-K77D detects semiconductor gasses that may be toxic or combustible. Users of the Model GD-K77D must follow the instructions and warnings in this manual to assure proper and safe operation of the Model this ManualThis manual is intended for use with the RKI Instruments Intelligent Gas Detector, Model GD-K77D .

6 It describes the Model GD-K77D s specifications, internal components, operation, calibration, and Safety PrecautionsTo ensure the consistent performance and reliability of the RKI Instruments Intelligent Gas Detector, Model GD-K77D , carefully read and follow the instructions in this manual before using the unit. Keep this manual where you can find it easily. When operating or performing maintenance on the Model GD-K77D , refer back to this manual as required. Also keep maintenance records, and use them to plan for future repairs and maintenance of the Model the Model GD-K77D is not operated according to the instructions in this manual, RKI Instruments , Inc. cannot assume any responsibility for consequential injury or the Model GD-K77D is considered to be safety equipment designed to detect semiconductor gases, which can be toxic or explosive, be sure to check the Model GD-K77D daily.

7 If any problem or malfunction is found, contact your local distributor, or RKI Instruments , Inc., this manual you will see cautionary labels. Read them carefully and heed their warnings. Failure to do so may result in injury or damage. 6 OverviewModel GD-K77D Operator s ManualDANGER:This label alerts you to the possibility of serious injury or death when using or servicing the Model GD-K77D improperly in potentially hazardous environments or conditions. The Model GD-K77D is not explosion proof. Do not use the Model GD-K77D for gas detection above the lower explosive limit (LEL). WARNING:This label alerts you to the potential danger of electrical shock, or other hazards. When electrical safety is not followed, injury or damage to the Model GD-K77D may result. Remember that the Model GD-K77D is an electrically powered device. In some circumstances, the Model GD-K77D may be affected by electrical noise, static electricity, or electromagnetic interference.

8 If the environment in which the Model GD-K77D is to be placed has these electrical hazards, take the appropriate steps to shield the Model GD-K77D :This label alerts you to the possibility of injury or damage to the Model GD-K77D when operation and maintenance of the Model GD-K77D are not performed in accordance with the instructions in this manual. When replacing parts for the Model GD-K77D , use only RKI replacement parts. Modified or non-RKI replacement parts can damage the Model GD-K77D . Should such damage occur, RKI Instruments , Inc. is not responsible, and the warranty may be :This label indicates that important advice or operating or maintenance tips follow. Read the note carefully and follow its instructions. Model GD-K77D Operator s ManualSpecifications 7 SpecificationsSpecifications subject to change without notice. Accessories: Dust filterTable 1: Specifications for the Model KD-K77 DModelGD-K77 DGD-K77D-NTRelay output for remote alarmElectrochemical cellRelay output for remote alarmRefer to the RKI Instrument, Inc.

9 List of detectable gassesTarget gas and detection rangeSee RKI List of Detectable GasesSignal output (4-20 mA)Two-wire digital signalDisplayDigital LED display, 4 digitAlarmsTwo alarm levels: alarm 1 (yellow LED),alarm 2 (red LED), troubleRelay output for remote alarmDry contact for each alarm1, alarm2, and trouble alarmSelf-diagnostic functionsTrouble, low flow, system failure, communication errorTemperature and humidity Ranges0-40 C, 30-85% relative humidityPower requirements24 VDC+/- 10%, approximately 10 WRecommended cable (see also RKI wiring chart)18 gage shielded cableShielded twisted pair cable (18 gage)Dimensions and "(W) x "(H) x "(D), tubing4 mm x 6 mm PTFE (Teflon tubing, RKI part # 06-1272RK) mm diameter x 20 mm length; 2A, 250V 8 DescriptionModel GD-K77D Operator s ManualDescriptionThe Model GD-K77D is designed to measure gas leaks in an industrial setting.

10 Gas leaks are detected by an internal electrochemical sensor, and the gas concentration is displayed by a four-digit LED 1: External Component BushingFlow Meter WindowSKIP LEDALM2 LEDALM1 LEDPW/TR LEDGAS DETECTORMODELGD-K7 7 DLED Exhaust, for 4 x 6 mm P FTE TubeGas I nlet, for 4 x 6 mm PTFE Card Retaining Screw Model GD-K77D Operator s ManualDescription 9 Figure 2: Removing the Cover and Detector UnitCoverWa ll moun ting bracketDetector unit 10 DescriptionModel GD-K77D Operator s ManualThe Model GD-K77D provides a three-wire 4-20mA signal output for a controller. The Model GD-K77D -NT provides a two-wire digital signal which is used by the RM-77NT accessory and is then converted to either an RS-232C or RS-485 signal. It has two gas alarm levels, two sets of gas alarm relay contacts, a trouble alarm, and trouble relay Model GD-K77D is a sample draw gas detection head.