Bacharach GDC-350 Owner's Manual
Contents
1. The Measurable Difference GDC 350 Instruction 5909 9000 Operation Manual Rev 1 January 2012 Product Leadership e Training e Service e Reliability GDC 350 Operation Manual DISCLAIMER Under no circumstances will Bacharach Inc be liable for any claims losses or damages resulting from or arising out of the repair or modification of this equipment by a party other than Bacharach service technicians or by operation or use of the equipment other than in accordance with the printed instructions contained within this manual or if the equipment has been improperly maintained or subjected to neglect or accident Any of the forgoing will void the warranty REVISIONS Bacharach Inc makes no warranty or representation expressed or implied including any warranty of merchantability or fitness for purpose with respect to this manual All information contained in this manual is believed to be true and accurate at the time of printing However Bacharach reserves the right to make changes at any time without notice Revised copies of this manual can be obtained by contacting Bacharach Inc Should you detect any errors or omissions in this manual please contact the company at the following address Bacharach Inc 621 Hunt Valley Circle New Kensington PA 15068 7074 USA Toll free 1 800 736 4666 Fax 24 334 5001 E mail help MyBacharach com Website www MyBacharach com In no event will Bacha2. Jumpers For Calibrations and Other Service Set up Functions Push Buttons for Service an Cd ME i bf Access and Additional Test Functions Smart Sensor Board Dual Sensor Board Is Shown Figure 1 3 Interior Components of the GDC 350 5909 9000 Rev 1 GDC 350 Operation Manual 1 4 Sensor Aging and Calibration Extending Firmware CEF GDC 350 systems with on board electrochemical sensors have been programmed with our Calibration Extending Firmware This firmware takes into consideration the aging of the electrochemical CO NO and sensors so that less frequent calibrations are acceptable in non critical applications such as parking garages The system tracks the age of the sensor and automatically compensates for the degraded output of the sensor as it ages 2 SPECIFICATIONS 2 1 Controller Specifications Dimensions 5 13 x 7 13 x 4 00 133 172 67 130 x 181 x 102 m pue M with E with Construction hinged secured door hinged secured door drip resistant water tight oe 24 V nominal or AC 50 60 Remote 500 maximum distance between controller and Sensor remote sensor using minimum 18 gauge wire for Common set of LED indicators 4 Power Fail Low seri e Alarm Display High Gas Alarm Sensor indicators 2 for User Sensor 1 Sensor 2 Interface 4 digit 8 segment LED digital display optional PUN Push button to silence audible alarm Relays Two DPDT
3. 2 The audible alarm beeps once for confirmation The system is now waiting for the user to set the desired span value Attach volt meter leads to test points TP1 and TP2 4 Using the UP or DOWN push buttons achieve the calculated voltage on the volt meter Move the jumpers from J6 and J7 back to their P1 resting positions 30 5909 9000 Rev 1 GDC 350 Operation Manual CALIBRATING THE NULL ZERO Calibrating the Null Zero Procedure Attach a regulator to a cylinder of zero air Attach the flow adapter and open the regulator valve fully to allow zero air to flow over sensor Use a slight twisting motion as you gently push the calibration adapter into the sensor opening If the calibration adapter is hard to insert moisten the O ring seal slightly then try re inserting it Move the jumper on J6 to P3 and move jumper on J7 to P3 The audible alarm beeps once for confirmation The system is now starting the zero calibration stabilization time 30 seconds If desired attach volt meter leads to test points TP1 and TP2 The voltage should be 0 0 VDC The instrument will beep twice when the calibration begins Leave the zero air flowing over the sensor until the GDC 350 beeps three times indicating the procedure is finished 1 minute Move the jumpers from J6 and J7 back to their P1 resting positions and remove the zero air or nitrogen Calibrating the Span Procedure Attach a regulator to a cylinder of span gas
4. Insert the calibration adapter into the sensor opening on the front of the enclosure Use a slight twisting motion as you gently push the calibration adapter into the sensor opening If the calibration adapter is hard to insert moisten the ring seal slightly then try re inserting it Open regulator valve fully and allow span gas to flow over sensor Move the jumper on J6 to P2 and move the jumper to P4 The audible alarm beeps once for confirmation The system is now starting the span calibration stabilization time 30 seconds If desired attach volt meter leads to TP1 and TP2 The reading should start moving towards the voltage calculated for the span gas value The instrument will beep twice when the calibration begins Leave the span gas flowing over the sensor until the GDC 350 beeps three times indicating the procedure is finished 2 minutes Move the jumpers from J6 and J7 back to their P1 resting positions and remove the span gas 5909 9000 Rev 1 31 GDC 350 Operation Manual 5 7 Calibrating 4 20 mA Signal for Incoming Analog Transmitter To perform this function you will need an accurate current source able to generate 4 0 mA and 20 0 mA current signals or a Bacharach GDC 150 USING A CURRENT SOURCE TO CALIBRATE THE NULL ZERO Using A Current Source to Calibrate the Null Zero Procedure Connect the current source to pin 10 and ground to pin 11 on the wiring terminal block 2 Set the curre
5. RETURNED GOODS MUST BE ACCOMPANIED WITH AN RMA NUMBER PACK THE EQUIPMENT WELL IN ITS ORIGINAL PACKING IF POSSIBLE AS BACHARACH CANNOT BE HELD RESPONSIBLE FOR ANY DAMAGE INCURRED DURING SHIPPING TO OUR FACILITY NOTICES COPYRIGHTS THIS MANUAL IS SUBJECT TO COPYRIGHT PROTECTION ALL RIGHTS ARE RESERVED UNDER INTERNATIONAL DOMESTIC COPYRIGHT LAWS THIS MANUAL MAY NOT BE COPIED OR TRANSLATED IN WHOLE OR IN PART IN ANY MANNER OR FORMAT WITHOUT THE WRITTEN PERMISSION OF BACHARACH INC iv 5909 9000 Rev 1 GDC 350 Operation Manual TABLE OF CONTENTS Te OVERVIEW eee eee ee 1 11 General Description TUE 1 1 2 Key Exterior 1 1 3 Key Interior Components num Ur uis eme deu marta 2 1 4 Sensor Aging and Calibration Extending Firmware CEF 3 2 SPECIFICATIONS ee eee 3 2 1 Controller Specifications 3 2 2 Sensor ODSCIIC AMON S 5 VAS NM Model DesignallONS 6 2 INSTALLATION c 8 31 Sensor Mounting RR 8 9 2 Basie ENCIOSUTO ee phas un EEEE EES 8 3 3 Remote Sensor Housing for Solid State 9 3 4 Detailed Wiring Connections Types A B and 9 3 5 Detailed Wiring Connect
6. if it has been set to the DOWN position to turn off the audible alarm 4 4 System Jumpers There are two banks of jumpers located directly below the DIP switches One bank of nine 9 jumpers 18 pins J7 and one bank of four 4 jumpers 8 pins J6 These jumpers allow the user to perform a wide range of set up and calibration functions The following table details the jumper settings for each bank of jumpers and explains the function enabled when these jumper positions are selected Always set J6 jumpers first followed by J7 jumpers Jumper 4 located on J6 is used to set custom time delays for relays and internal audible alarm These functions are explained in Section 4 6 NOTE In Figure 4 2 the jumper tab for both banks is covering the P1 position re 88 8 5909 9000 Rev 1 19 GDC 350 Operation Manual Z U U U U u u Uu c gt N N on BR Oo NM N Resting J7 jumpers are disabled Setting Span Gas Value On board Sensor Perform Zero Null Calibration On board Sensor Adjust Low Gas Alarm Ascending Value On board Sensor Perform Span Calibration On board Sensor Adjust High Gas Alarm Ascending Value On board Sensor Adjust Low Gas Alarm Descending Value On board Sensor Adjust High Gas Alarm Descending Value On board Sensor Enable Disable Current Output Setting Span Gas Value Remote Sensor Perform Zero Null Calibration Remote Sensor Perform Span Calibra
7. signal response 0 C to 50 C operating 10 of set point 2 to 3 years in air under normal conditions CO NO SO gas specific 20 to 40 C 4 to 104 35 seconds to 90 of signal response 0 C to 40 C operating 10 of set point 5 years in air under normal conditions E g Propane C3Hs gasoline vapors methane non specific combustibles 120 seconds to 9090 of signal response 0 C to 40 C operating 5 signal loss month at ambient temperatures 10 of set point 4 5 years in air R11 R12 R22 R123 R134A R404A 407 R410A R422A R422D R438A and R507 4 20 mA signal All integral electrochemical gas sensors are packaged as Smart sensor modules Supports any 4 20 mA analog transmitter manufactured by Bacharach 5909 9000 Rev 1 GDC 350 Operation Manual 2 3 Model Designations TYPE One on board electrochemical sensor Opening for on board sensor e g CO SINGLE CHANNEL TYPE One remote solid state sensor OR one remote analog transmitter Remote Remote Analog Plugged Solid State Sensor Transmitter sensor opening OR SINGLE CHANNEL Use 3 conductor Use 3 conductor 18 gauge wire shielded wire One on board electrochemical sensor Chan 1 PLUS one remote solid state sensor OR one remote analog transmitter Chan 2 2 Remote Remote Analog Opening for Solid State Sensor Transmitt
8. 0 C 60 C Temperature F 90 F 100 F If the GDC 350 has been equipped with an LED digital display set values according to what is displayed If the GDC 350 does not have a digital display you will need to attach volt meter leads to the two test points TP1 and TP2 located just below the high alarm relay RLY2 on the main circuit board v IN Ib3 V Im R70 R5 AT Y L3 rer R3 gt mlo F map RUE 4 p JANE Figure 4 3 Locations of Test Points TP1 and TP2 Move the jumper on the lower bank J6 from its resting position P1 and place it on the appropriate jumper position as indicated in the table on the previous page Next move the J7 jumper from its resting position to the desired position Then use the UP or DOWN push buttons to set the desired alarm value To make additional changes to the sensor selected via J6 repeat the following steps e move J to the appropriate position e use the UP or DOWN push buttons to set the desired alarm value 5909 9000 Rev 1 21 GDC 350 Operation Manual Once all alarm settings have been set to desired values move J7 back to its resting position P1 Then move jumper J6 back to its resting position P1 on the lower bank All new values will be written to the EEPROM Refer to the flowchart below Start J6 on P1 Resting Position J7 on P1 Resting Position Move J6 to desired position to s
9. DC 0 20 ppm 2 ppm 0 40 VDC 5 ppm 1 00 VDC Combustibles 0 50 LEL 20 1 1 1 60 VDC 40 LEL 3 20 VDC Refrigerant Gases 0 2000 ppm 500 ppm 1 00 VDC 1000 ppm 2 00 VDC R series 4 6 Relay Time Delays The GDC 350 offers a wide range of time delay settings that are user configurable If the GDC 350 has been equipped with the LED digital display read the values on the display as you change them to suit your application If the GDC 350 does not have a digital display you will need a volt meter The voltage reference is 0 4 VDC Attach the volt meter leads to the two test points TP1 and TP2 located just below the high alarm relay RLY2 on the main circuit board 5909 9000 Rev 1 23 GDC 350 Operation Manual AT POINTS IN AT TEST POINTS IN MINUTES 96 08 99 16V 80 18V 90 Move the jumper on the lower bank J6 from its resting position P1 to This is the system configuration position Next select the jumper position on upper bank J7 to achieve the desired function Reference the table on page 20 for appropriate jumper position locations Once the desired jumper position has been achieved use the UP or DOWN push buttons to make changes Once the desired time delays have been set move jumper back to resting position P1 of the upper bank J7 If additional time delays are desired move the jumper to the appropriate position and onc
10. OFF Bridge P1 and P2 High brightness level Display only gas name acronym Bridge P2 and P3 Display gas value and gas name Bridge P1 and P2 Bridge P2 and P3 NOTE The factory default setting for detectors with an LED digital display are 1 Display is ON 2 Brightness level is Low 3 Display indicates gas type and gas value second then the gas value is shown for 2 seconds The sequence is 9 NOTE Typically the LED digital display shows the gas name for 1 the same for 1 or 2 channel systems 26 5909 9000 Rev 1 GDC 350 Operation Manual 5 CALIBRATION repetitive beeps the sensor is not settling within tolerance 195 for catalytic and solid state sensors 2096 for electrochemical sensors Contact d NOTE During any calibration procedure if the instrument sounds with Bacharach support for additional information 5 1 Calibration Specifications Gas Calibration span gases should be at least 5 accuracy and have a current date stamp Gas generators should have a current dated cell installed Service personnel should flow zero emissions air or 20 9 volume oxygen before attempting to null adjust toxic gas sensors In some cases nitrogen can be substituted for zero air Nitrogen is required to null zero oxygen O2 and carbon dioxide CO2 sensors Exception If the service person is confident of air quality and is careful do not exhale in the direction of the oxygen sensor being serviced while span ad
11. THE INSTRUCTIONS INDICATED IN THIS MANUAL OR HAS BEEN ABUSED OR DAMAGED IN ANY WAY THIS INSTRUMENT IS ONLY TO BE USED FOR PURPOSES STATED HEREIN 5909 9000 Rev 1 iii GDC 350 Operation Manual SERVICE POLICY BACHARACH INC MAINTAINS AN INSTRUMENT SERVICE FACILITY AT THE FACTORY SOME BACHARACH DISTRIBUTORS AGENTS MAY ALSO HAVE REPAIR FACILITIES HOWEVER BACHARACH ASSUMES NO LIABILITY FOR SERVICE PERFORMED BY ANYONE OTHER THAN BACHARACH PERSONNEL REPAIRS ARE WARRANTED FOR 90 DAYS AFTER DATE OF SHIPMENT SENSORS PUMPS FILTERS AND BATTERIES INDIVIDUAL WARRANTIES SHOULD YOUR INSTRUMENT REQUIRE NON WARRANTY REPAIR YOU MAY CONTACT THE DISTRIBUTOR FROM WHOM IT WAS PURCHASED OR YOU MAY CONTACT BACHARACH DIRECTLY IF BACHARACH 15 TO DO THE REPAIR WORK SEND THE INSTRUMENT PREPAID TO BACHARACH INC AT THE FOLLOWING ADDRESS BACHARACH INC 621 HUNT VALLEY CIRCLE NEW KENSINGTON PA 15068 ATTENTION SERVICE DEPARTMENT ALWAYS INCLUDE YOUR RMA ADDRESS TELEPHONE NUMBER CONTACT NAME SHIPPING BILLING INFORMATION AND A DESCRIPTION OF THE DEFECT AS YOU PERCEIVE IT YOU WILL BE CONTACTED WITH A COST ESTIMATE FOR EXPECTED REPAIRS PRIOR TO THE PERFORMANCE OF ANY SERVICE WORK FOR LIABILITY REASONS BACHARACH HAS A POLICY OF PERFORMING ALL NEEDED REPAIRS TO RESTORE THE INSTRUMENT TO FULL OPERATING CONDITION PRIOR TO SHIPPING EQUIPMENT TO BACHARACH CONTACT OUR OFFICE FOR AN RMA RETURNED MERCHANDISE AUTHORIZATION ALL
12. Terminal to Remote Sensor GND Incoming Power 24 VDC 24V Incoming Power 24 VDC 24 VAC 24V Incoming Power 24 VAC 1 Solid state sensor breaths through these openings J OJ J WL Relay 1 2 Out Remote Sensor Incoming Power Figure 3 3 Wiring Connections for GDC 350 Types A B and D 5909 9000 Rev 1 GDC 350 Operation Manual 3 5 Detailed Wiring Connections Type E ET NO Relay 1 Low Alarm Y COM Relay 1 Low Alarm Relay 1 T NC Relay 1 Low Alarm 1 NO Relay 2 High Alarm YT COM Relay 2 High Alarm Relay 2 NC Relay 2 High Alarm y 4 20 4 20 Analog Output Channel 1 Analog L un Out Ch 1 Y NEG Negative Analog Output Channel 1 m POS Used YT SIG 4 20 mA Analog Output Channel 2 Analog v NEG Negative Analog Output Channel 2 Out Ch 2 T GND Incoming Power 24 VDC HT 24V Incoming Power 24 VDC 24 VAC Incoming Power NT 24V Incoming Power 24 VAC Figure 3 4 Wiring Connections for GDC 350 Type E 3 6 Wiring the GDC 350 for Power Drill out one or more of the PVC conduit entry hole plugs located at bottom left or right or top left edge of system enclosure base If supplying VAC operational power pull two wires suitable for low voltage from power source to the terminals 13 and 14 If supplying VDC wire to terminals 12 and 13 observing polarity 120 VAC 120 VAC Controller with Figure 3 5 Prope
13. aintenance other than regular calibration of the integral and or remote sensors and ensuring that excess water or dust is not somehow entering the enclosure and physically damaging the circuit board or internal components 5909 9000 Rev 1 33 GDC 350 Operation Manual 7 COMMON ACCESSORIES OPTIONS AND REPLACEMENT PARTS Water dust enclosure NEMA 4 World Headquarters 621 Hunt Valley Circle New Kensington Pennsylvania 15068 Phone 724 334 5000 Toll Free 1 800 736 4666 Fax 724 334 5001 Website www MyBacharach com E mail helo MyBacharach com 34 5909 9000 Rev 1
14. beep once to indicate it is in the 5 second test function Release the UP push button after 5 seconds and an automatic test function will occur Alternatively use the silence push button on the front door to perform the same function The low alarm relay will de energize and the low alarm LED on the front door will illuminate The low alarm relay will then re energize while the low alarm LED stays lit for 10 seconds Next the high alarm relay will de energize the high alarm LED on the front door will illuminate and the audible alarm will activate The relay will then re energize but the high alarm LED and the audible alarm will stay activated for 10 seconds After 10 seconds everything resets to normal operating condition If a longer test sequence is desired hold down the UP push button for 10 seconds to activate the low alarm relay high alarm relay low alarm LED and high alarm LED for 15 minutes 5909 9000 Rev 1 17 GDC 350 Operation Manual To abort this test press the internal UP push button or the exterior silence push button and everything will reset to normal operating condition If the GDC 350 is equipped with a digital display it will indicate test during this test period 4 3 DIP Switch Settings SW Feature to enable Default Low Gas Alarm On Delay 2min Low Gas Alarm Off Delay 10 High Gas Alarm On Delay 5 Audible Alarm On Delay 5 min Audible Alarm Feature On Cc AGO N
15. dry contact relays rated 5 A 240 VAC Low Gas Alarm On Delay 5 min Control Relays Low Gas Alarm Off Delay on break 10 min Settings High Gas Alarm On Delay on make 5 min DIP Switch Audible Alarm On Delay on make 5 min Audible Alarm Feature on off Environ 0 to 40 C 32 to 104 F mental Humidity 0 to 95 RH non condensing System is configured such that all relays are FAIL SAFE relay coils are always energized in non alarm state Relays are common to both channels activated by either channel May be set by user Also known as minimum run time 5909 9000 Rev 1 3 GDC 350 Operation Manual 4 675 172 gt 2 625 67 mm Figure 2 1 Standard Enclosure Dimensions lt 7 13 181 gt 1 Figure 2 2 Water Tight Enclosure Dimensions 4 5909 9000 Rev 1 2 2 Sensor Specifications Categories Subcategories On Board Sensors Remote Sensors 1 Electrochemical Gas Specific Temperature Solid state Combustibles Non specific Solid state Refrigerants Non specific Analog transmitter Response Temp Range Repeatability Life Span Gases Response Temp Range Repeatability Life Span Gases Response Temp Range Long Term Drift Repeatability Life Span Typical Refrigerant Gas Sensors Available GDC 350 Operation Manual 30 seconds to 90 of
16. e E mi Pia fc LJ I L3 um 1 JP F Hi Figure 4 1 DIP Switch Settings for Alarms DIP switches in the UP position Fixed delay durations indicated above are factory default settings Time delay durations can be changed by user See page 23 delays are enforced upon alarm relay make conditions Off delays are enforced upon alarm relay break conditions If DIP switch 5 is in the up position the internal audible alarm responds to whatever commands it is given by the microprocessor in the circuit If DIP switch 5 and DIP switch 4 are in the up position the audible alarm responds after the user preset time 18 5909 9000 Rev 1 GDC 350 Operation Manual delay function for the audible alarm has timed out If DIP switch 5 is in the down position the audible alarm does not respond at all The internal audible alarm normally activates with a steady tone when a high gas alarm condition exists The internal audible alarm normally activates with a pulsing tone when a fault condition exists fault condition could consist of any of the following e Remote solid state sensor failure open loop e Analog signal from a remote 4 20 mA transmitter is not registering with the GDC 350 e Smart sensor board is not plugged into the main board Fault conditions automatically override the ON OFF DIP switch 5
17. e again use the push buttons to set desired voltage to achieve desired time delay 24 5909 9000 Rev 1 GDC 350 Operation Manual Once all desired time delay settings have been achieved move the jumper back to position 1 P1 on jumper J7 and move the jumper back to position 1 P1 on lower the lower bank J6 At that point all new settings will be written to the EEPROM FUNCTION Low alarm ON time delay Low alarm OFF time delay High alarm ON time delay Audible alarm ON time delay 4 7 Temperature Display Unit of Measure The GDC 350 systems all have an on board temperature chip from which information is used to temperature compensate certain sensors This temperature chip can also be used as a second sensor in applications where the user requires both a gas measurement and a temperature measurement To switch between Celsius and Fahrenheit displayed values follow this procedure Move the jumper from the resting position P1 on the lower bank J6 to P4 and the jumper 7 to P8 Pressing the UP push button will display the temperature in Celsius and the output between test points TP1 and TP2 is 4 0 V If the DOWN push button is pressed the temperature is displayed in Fahrenheit and the output between the test points is O V Once the desired unit of measure has been achieved move the jumper back to P1 on the lower bank J6 At that point all new settings will be written to the EEPROM NOTE The tempera
18. elect target sensor Move J7 to new position to select desired function Use UP and DOWN buttons to set desired value You may do all J7 actions for the selected J6 sensor Move J7 back to P1 Resting Position You may modify settings individually by cycling through this process for each change Move J6 back to P1 Resting Position New values written to EEPROM Figure 4 4 Jumper Settings J6 and J7 Alarm settings for GDC 350 detectors are voltage settings The range of 0 4 0 VDC is equal to the full measurement range of the sensor For example a CO sensor has a standard measurement range of 0 200 ppm therefore 4 0 VDC 200 ppm Reference the formula below and the table on page 23 22 5909 9000 Rev 1 GDC 350 Operation Manual Desired Set Point x100 of Range sensor Range 100 PPM x100 50 of Range 200 PPM Full Range Required Alarm Of Sensor of Range Voltage Setting Output 4 0 VDC X 50 2 0 VDC Therefore in this example the required voltage setting to achieve an alarm set point of 100 ppm is 2 0 VDC VOLTAGE REFERENCE TABLE FOR ALARM SETTINGS SENSOR MEASUREMENT LOW ALARM HIGH ALARM GAS RANGE SET VOLTAGE SET VOLTAGE 0 200 25ppm 0 50VDC 100 100 ppm 2 00 VDC 100 ppm 2 00 VDC 2 00 VDC 0 10ppm 0 7 ppm 0 56VDC 1 5 ppm 1 20 VDC 0 25 0 Vol 19 5 Vol 3 12 VDC 23 0 Vol 3 68 VDC 0 100 ppm 25ppm 1 00VDC 50 ppm 2 00 V
19. er on board sensor DUAL CHANNEL Use 3 conductor Use 3 conductor 18 gauge wire shielded wire Two on board electrochemical sensors Chan 1 and Chan 2 Opening for two on board sensors DUAL CHANNEL STANDARD ENCLOSURES 6 5909 9000 Rev 1 GDC 350 Operation Manual One on board electrochemical sensor Opening for on board sensor behind splash guard SINGLE CHANNEL One remote solid state sensor OR one remote analog transmitter Sensor opening is plugged internally Remote Remote Analog Solid State Sensor Transmitter SINGLE CHANNEL One on board electrochemical sensor Chan 1 PLUS one remote solid state sensor OR one remote analog transmitter Chan 2 Opening for on board sensor behind splash guard Remote Remote Analog Solid State Sensor Transmitter DUAL CHANNEL Two on board electrochemical sensors Chan 1 and Chan 2 Opening for two on board sensors DUAL CHANNEL WATER TIGHT ENCLOSURES 5909 9000 Rev 1 7 GDC 350 Operation Manual 3 INSTALLATION 3 1 Sensor Mounting Heights Gas Applications Types Suggested Mountings Carbon Monoxide Gas engine exhaust Nitric Oxide Diesel engine exhaust Nitrogen Dioxide applications Refrigerants Combustibles 4 to 6 from the floor from the floor or near likely spot for leakage On near ceiling within 12 NOTE Bacharach considers 4 to 6 feet from the floor as the breathing zone when it applies to se
20. g controlled by it lf a time delay ON has been set internal DIP switches then the Low alarm LED will flash indicating the time delay has been activated and the low alarm relay will not de energize until the delay has timed out Once the low alarm relay has de energized it will re energize automatically once the gas alarm condition goes away unless a time delay OFF minimum run time internal DIP switches has been programmed The same procedure applies to the second channel in the case of a two channel two sensor system In the event of a gas build up beyond the preset high alarm trip point the Sen 1 LED illuminates the High alarm level LED illuminates and the high alarm relay de energizes activating anything controlled by it If a time delay ON has been set internal DIP switches then the High alarm LED will flash indicating the time delay has been activated and the high alarm relay will not de energize until the delay has timed out Once the high alarm relay has de energized it will re energize automatically once the gas alarm condition has dispatched The same procedure applies to the second channel in the case of a two channel two sensor system 9 NOTE No minimum run time delay is provided for the high alarm relay 4 2 Test Functions A momentary test feature is provided to allow the user to test basic functionality of the circuit Press the UP push button internal for 5 seconds the audible alarm will
21. ions Type E 10 3 6 Wiring the GDC 350 2 10 3 7 Wiring Remote Sensors Voltage and 12 3 8 Wiring Relay COnnecllollSssescsdesexuin iren dann 3 85 12 3 9 Installation Example 1 Type A with Enclosed Transformer 13 3 10 Installation Example 2 Type B with Remote Solid State Sensor 14 3 11 Installation Example 3 Type D with On Board and Remote Sensors 15 3 12 Installation Example 4 Type E with Two On Board Sensors 16 3 13 Powering On The GDC 350 aie Leer peer a raus 16 4 CONFIGURATION AND nnn nnn nnn nnn nnn 16 RN 16 ToS RUNCU 17 4 3 DIP Switch 5 18 2 ECOUTER 19 4 5 Adjusting Alarm 21 2E MES VMENI ABITTUIMENNEEN mmm 23 4 7 Temperature Display Unit of 25 4 8 Latching Relay Function 25 4 9 LED Digital Display Ke RTL 26 2 CALIBRATION 27 5 1 Ca
22. justing oxygen in the breathing environment can be used as a fairly accurate source of span gas 20 9 volume It is not recommended to use this procedure for span adjustments of OXygen sensors Regulators and Flow Calibration gases that are lighter than or the same weight as air CO etc should be flowed at 0 5 LPM Gases heavier than air NO etc should be flowed between 0 5 and 1 0 LPM Fixed flow regulators provide more accuracy Gases should be flowed over the sensor for at least 2 5 to 4 0 minutes Carbon Monoxide sensors settle out very quickly but sensors for reactive gases NHs3 etc will take longer to stabilize to the calibration gas All cylinder regulators supplied by Bacharach use a fixed flow orifice Adapters he proper calibration adapter should be utilized to allow the gas to properly diffuse around the sensor They are available from Bacharach humidification chamber must be utilized for all solid state sensors except ammonia This is also available form Bacharach See table on page 34 for ordering information 5 2 Frequency Recommendations Sensor Types Applications Calibration Frequency Parking garage detectors Once every 12 months OHS Occupational Health and Safety applications Once every 6 months For the purposes of safety in OHS applications sensors should be gas tested e g bump tested once every month to confirm response IMPORTANT In applications where life safety is critical e
23. lded cable Observe polarity because the GDC 350 supplies DC power to the remote sensor 14 5909 9000 Rev 1 GDC 350 Operation Manual 3 11 Installation Example 3 Type D with On Board and Remote Sensors On Board Electrochemical Carbon Monoxide CO Sensor Mounting height of the GDC 350 should be about 4 to 6 feet from the floor the breathing zone Installer supplied low voltage operating power Conduit and 3 conductor wire to the remote sensor is supplied by the installer In this installation the remote sensor is for heavier than air combustible gases such as propane so sensor should be installed 6 from the floor Standard electrical junction box must be supplied by the installer Instead remote solid state refrigerant sensor could have been installed at 6 from the floor or near the most likely leak area Remote Solid State Sensor Figure 3 9 Sample Type D Installation 5909 9000 Rev 1 15 GDC 350 Operation Manual 3 12 Installation Example 4 Type E with Two On Board Sensors Two On Board Electrochemical Sensors such as CO Gas Engine Exhaust and NO Diesel Engine Exhaust Installer supplied low voltage operating power Figure 3 10 Sample Type E Installation 3 13 Powering On the GDC 350 Upon application of power the green LED light indicator s will illuminate and the LED between CH 1 and CH 2 will be blinking but all alarms are disabled for 2 mi
24. libration 27 5 2 Frequency Recommendations 27 5 3 Calculating the Span Gas Value 28 5 4 Calibrating the On Board Sensor asas equos eno Eo edet oak eh 29 5 5 Calibrating a Second On Board 30 5 6 Calibrating a Remote Solid State 30 5 7 Calibrating 4 20 mA Signal for Incoming Analog Transmitter 32 6 SYSTEM MAINTENANGBE 2 uua Ue Cu nw Usu EE Se 33 7T COMMON ACCESSORIES OPTIONS AND REPLACEMENT PARTS 34 5909 9000 Rev 1 v GDC 350 Operation Manual 1 OVERVIEW 1 1 General Description The GDC 350 is an economical self contained gas detector for non hazardous non explosion rated commercial applications lt is available in two basic configurations single sensor models and dual sensor models The sensors can be configured as one of the following e on board A type e one remote B type e one on board and one remote D type e twoon board E type A basic system provides LEDs to indicate Power Fail Low Warning Gas Alarm and High Gas Ala
25. mitters should measure approximately 24 VDC nominal This voltage is factory set at time of manufacturing If these voltages are not attained after installation the wrong gauge wire may have been used or the wiring run is too long The maximum distance between the GDC 350 and the remote sensor is 500 feet The remote solid state sensor housing has a 3 4 conduit thread and nut to allow installation in any standard electrical junction box to be supplied by the installer Connect three low voltage wires between it and the controller and observe polarity 3 8 Wiring Relay Connections oystem relays are dry contacts and designed to operate fan starters or coils to control equipment that draws more than 5 amps start up and or operational current The system does not provide any power from these terminals Dry contacts operate like a switch to simply activate switch on or de activate switch off equipment to be controlled such as fan starters NOTE System relays are SPDT single pole double throw thereby providing one set of usable dry contacts for each relay Because the 9 GDC 350 series systems are designed to be fail safe any equipment to be controlled by the system relays should be wired to the NC Normally closed and COM Common terminals The relay coils are normally energized in non alarm state for fail safe operation 12 5909 9000 Rev 1 GDC 350 Operation Manual 3 9 Installation Example 1 Type A with Enclosed Transf
26. nsors installed for vehicle exhaust applications 3 2 Basic Enclosure Upper Upper Mounting Bracket Conduit P Entry Enclosure Base Alternative T Mounting E 2 Holes A Le a Bottom X D Conduit Bottom TET Entry Conduit Entry V Bottom Mounting Bracket Enclosure Upper Top View Conduit Entry Enclosure Bottom Bottom View Conduit Entry here are two exterior mounting brackets one at the top and one at the bottom of the base of the enclosure These may be used to mount the enclosure Alternatively there are four corner mounting holes in the enclosure Remove the screw securing the hinged door Locate the four 3 16 diameter mounting holes located inside the system enclosure base Secure the system to any flat surface through these mounting holes Figure 3 1 Basic Enclosure Mounting Components 5909 9000 Rev 1 GDC 350 Operation Manual 3 3 Remote Sensor Housing for Solid State Sensors Red Yellow Signal Black Figure 3 2 Remote Sensor Housing 3 4 Detailed Wiring Connections Types A B and D NO Relay 1 Low Alarm COM Relay 1 Low Alarm NC Relay 1 Low Alarm NO Relay 2 High Alarm COM Relay 2 High Alarm NC Relay 2 High Alarm 4 20 4 20 mA Analog Output NEG Negative Analog Output POS Positive Terminal to Remote Sensor SIG Signal Terminal to Remote Sensor NEG Negative
27. nt source to 4 0 mA Move the jumper on J6 to P3 and the jumper on J7 to P3 The instrument will beep once for confirmation The system is now starting the zero calibration stabilization time 30 seconds If desired attach volt meter leads to test points TP1 and TP2 Monitor the voltage The instrument will beep twice when the calibration begins instrument beeps three times indicating the procedure is finished 2 minutes 7 Move the jumpers from J6 and J7 back to their P1 resting positions USING A CURRENT SOURCE TO CALIBRATE THE SPAN Using a Current Source to Calibrate the Span Procedure Connect current source to pin 10 and ground to pin 11 on the wiring terminal block 2 Set the current source to 20 0 mA Move the jumper on J6 to P3 and the jumper on J7 to P4 The instrument will beep once for confirmation The system is now starting the span calibration stabilization time 30 seconds If desired attach volt meter leads to test points TP1 and TP2 Monitor the voltage instrument beeps three times indicating the procedure is finished 2 minutes Move the jumpers from J6 and J7 back to their P1 resting positions and remove the current source m The instrument will beep twice when the calibration begins The 32 5909 9000 Rev 1 GDC 350 Operation Manual USING A BACHARACH GDC 150 TO CALIBRATE THE NULL ZERO At the GDC 150 For zero calibration on the GDC 150 move the jumper to P2 and set the vol
28. nutes for a system warm up period After the warm up period the system may exhibit gas alarm condition s if one or both of the sensors has not completely stabilized during the warm up period This is normal and the length of time the gas alarms exist is dependent upon the length of time since the unit was last powered up and the state of the environment it is installed in After warm up only the green power LED illuminates indicating normal operation and the relays are energized indicating normal Fail safe status 4 CONFIGURATION AND OPERATION 4 1 General In the event of a burned out damaged or missing solid state sensor element the controller will indicate fail condition on the front door by illumination of the red fail LED At this point both system relays will have reversed state de energized and anything connected to them will be running continuously Normal system operation will not occur until the fault condition has been rectified The same condition will occur if the 4 20 mA signal from the remote transmitter is broken or interrupted NOTE Fail condition overrides any system time delays that may have been set 16 5909 9000 Rev 1 GDC 350 Operation Manual NOTE Reference photo on page 1 for location of LEDs and test buttons In the event of a gas build up beyond the preset low alarm trip point the Sen 1 LED illuminates the Low alarm level LED illuminates and the low alarm relay de energizes activating anythin
29. ormer Line voltage can enter through the upper conduit entry port Gas Sensor Monitor Conduit stubs shown in this photo are not supplied This photo represents just one way to install the transformer 2 a ee Low voltage and line voltage are segregated in this transformer Enclosed transformer is an optional accessory Bottom View High voltage side of enclosed transformer Low voltage side of enclosed transformer Figure 3 7 Sample Type A Installation 5909 9000 Rev 1 13 GDC 350 Operation Manual 3 10 Installation Example 2 Type with Remote Solid State Sensor a2 I Conduit and 3 conductor wire to the remote sensor is supplied by the installer Standard electrical junction box must be supplied by the installer Remote Solid State Sensor Mounting height of the GDC 350 should be about 4 to 6 feet from the floor the breathing zone Installer supplied low voltage operating power In this installation the remote sensor is for heavier than air combustible gases such as propane so sensor should be installed 6 from the floor Instead a remote solid state refrigerant sensor could have been installed at 6 from the floor or near the most likely leak area Figure 3 8 Sample Type B Installation NOTE Wiring between a GDC 350 and the remote sensor indicated above should be 3 conductor 16 to 18 gauge shie
30. quipment should be calibrated quarterly or on a more frequent basis Bacharach is not responsible for setting safety practices and policies Safe work procedures including calibration policies are best determined by company policy industry standards and local codes 5909 9000 Rev 1 27 GDC 350 Operation Manual NOTE It is recommended that a calibration label should be applied after every calibration to confirm work performed and the date it was confirmed If a controller is involved the alarm set points should be indicated on a label on the front door of the enclosure Calibration is achieved at the GDC 350 controller if the sensor is on board If the sensor is remote i e a GDC 150 analog transmitter the calibration is achieved at the transmitter using the procedure indicated in its operation manual Required Equipment e Volt meter e Calibration kit e Calibration gases Users can order the calibration kit calibration accessories and or gases from any Bacharach authorized distributor 5 3 Calculating the Span Gas Value To achieve calibration the user must first tell the GDC 350 what concentration of span he is going to flow over the sensor Within the controller this is a voltage setting The range of 0 4 VDC is equal to the full measurement range of the sensor Prior to attempting to calibrate determine the voltage value required Consult the table on page 23 for standard voltages If the value desired is not indicated u
31. r Wiring Examples 10 5909 9000 Rev 1 GDC 350 Operation Manual 120 VA Controller with J 4 20 mA Input s GDC 350 Controller with 4 20 mA Input s GDC 350 GND 24 VDC GND SIGNAL Controller with 4 20 mA Input s GDC 350 GND IS 24 VAC IS 24 VDC H Q 24 VAC VDC GND SIGNAL Controller with 4 20 mA Input s GDC 350 Figure 3 5 Proper Wiring Examples Continued 5909 9000 Rev 1 11 GDC 350 Operation Manual Controller with 4 20 mA Input s GDC 350 24 VAC GND GND SIGNAL Figure 3 6 Improper Wiring Example 3 7 Wiring Remote Sensors Voltage and Signal Three 3 conductor 16 to 18 gauge stranded wire is required between the control panel and the remote solid state sensor Under most local electrical codes low voltage wires cannot not be run within the same conduit as line voltage wires 3 conductor 16 to 18 gauge wire cable must be shielded when connecting to a remote analog transmitter The remote analog transmitter enclosures have several conduit entry locations general purpose enclosure strip Any damage caused by using solid core wire will void warranty 9 NOTE DO NOT use solid core wire for connection to wiring terminal Use stranded wire ONLY The voltage supplied by the controller to remote solid state sensors should measure approximately 5 0 VDC 2 at the remote sensor Voltage supplied by the controller to remote analog trans
32. rach Inc or its officers or employees be liable for any direct special incidental or consequential damages resulting from any defect in any manual even if advised of the possibility of such damages 2012 Bacharach Inc ii 5909 9000 Rev 1 GDC 350 Operation Manual IMPORTANT READ AND UNDERSTAND THIS MANUAL PRIOR TO USING THIS INSTRUMENT THIS INSTRUMENT SHOULD BE INSPECTED AND CALIBRATED AT REGULAR INTERVALS BY QUALIFIED AND TRAINED PERSONNEL FOR MORE INFORMATION REFER TO THE SYSTEM MAINTENANCE AND CALIBRATION PROCEDURE SECTIONS OF THIS MANUAL THIS INSTRUMENT HAS NOT BEEN DESIGNED TO BE INTRINSICALLY SAFE IN HAZARDOUS OR EXPLOSION RATED ENVIRONMENTS FOR YOUR SAFETY DO NOT USE IT IN AREAS CLASSIFIED AS HAZARDOUS AREAS E G EXPLOSION RATED ENVIRONMENTS PURCHASE DATE PURCHASED FROM WARNINGS CAUTION More than one live circuit is associated with this device Supply voltage is 24 V nominal DC or AC 50 60 Hz This product is certified for electrical shock and electrical fire hazard only CAUTION Disconnect power before servicing WARRANTY POLICY BACHARACH INC WARRANTS THIS INSTRUMENT TO BE FREE FROM DEFECTS IN MATERIALS AND WORKMANSHIP FOR A PERIOD OF TWO 2 YEARS FROM THE DATE OF PURCHASE INDIVIDUAL SENSOR ELEMENTS HAVE DIFFERENT WARRANTIES CHECK WITH FACTORY FOR SPECIFIC SENSOR WARRANTY THE WARRANTY STATUS MAY BE AFFECTED IF THE INSTRUMENT HAS NOT BEEN MAINTAINED AND CALIBRATED AS PER
33. rm Also included are an integral audible alarm with door mounted silence push button audible time delay field settable relay time delays and two alarm relays Gas specific electrochemical sensors for toxic gases and oxygen are available while MOS solid state sensors for combustible gases TVOOCs and refrigerants are also available All GDC 350 on board sensors are packaged as plug in smart sensor modules to reduce field maintenance time 1 2 Key Exterior Components LED Digital Display Optional Power Channel 1 and LED Channel 2 LED i Indicators Fail M Door Securing LED 24 Pd Latch Gas Door Securing LEDs Screw High gt PEET AE Monitor Low ff Internal L4 c j Alarm bs p Opening for Padlock Speaker Sensor Alarm Acknowledge Opening Test Push Button Figure 1 1 Standard GDC 350 Components NOTE Photos of the GDC 350 in this manual may show the optional LED digital display and or the optional splash guard 5909 9000 Rev 1 1 GDC 350 Operation Manual Optional Splash Guard Secured with Stainless Screws Water Tight Audible Alarm M Water Tight Alarm Silence Pushbutton e N Gas T Figure 1 2 Water Tight GDC 350 Components 1 3 Key Interior Components DIP Switches Low and High Alarm To Set Time Delays Dry Contact Relays Pluggable Wiring Terminal
34. se the following formula to calculate the voltage required Calibration Span Gas Value X100 6of Range sensor Range 100 PPM x100 50 200 PPM Full Range Required Calibration Of Sensor x ofRange Voltage Setting Output 4 0 V X 50 2 0 V Therefore in this example the required voltage setting to calibrate a 0 200 ppm sensor with 100 ppm is 2 0 VDC above equations must have the same Engineering Units e g PPM 9 NOTE Values for Calibration Span Gas and Sensor Range in the of LEL vol etc 28 5909 9000 Rev 1 GDC 350 Operation Manual NOTE When calibrating solid state sensors for combustibles or refrigerants the span gas must be humidified The use of a humidification chamber is required The humidification chamber sits in 9 line between the cylinder of span gas and the calibration adapter Remove the sponge inside the chamber and wet it under the tap oqueeze out the excess water so it is not dripping wet and place it back inside the chamber As gas flows through the chamber it absorbs water which acts to humidify it and the humidified span gas flows over the sensor See table on page 34 for ordering information 5 4 Calibrating the On Board Sensor SETTING SPAN GAS VALUE Setting Span Gas Value Procedure Move the jumper on J6 to P2 and move the jumper on J7 to P2 The audible alarm beeps once for confirmation The system is now waiting for the user to set the desired span val
35. span gas Insert the calibration adapter into the sensor opening on the front of the enclosure Use a slight twisting motion as you gently push the calibration adapter into the sensor opening f the calibration adapter is hard to insert moisten the ring seal slightly then try re inserting it Open regulator valve fully and allow span gas to flow over sensor Move the jumper on J6 to P2 and move the jumper on J7 to P4 The 4 audible alarm beeps once for confirmation The system is now starting the span calibration stabilization time 30 seconds If desired attach volt meter leads to test points TP1 and TP2 The reading should start moving towards the voltage calculated for the span gas value The instrument will beep twice when the calibration begins Leave the span gas flowing over the sensor until the GDC 350 beeps three times indicating the procedure is finished 2 minutes Move the jumpers from J6 and J7 back to their P1 resting positions and remove the span gas 5 5 Calibrating a Second On Board Sensor Calibration of the second on board sensor has only one difference from the first on board sensor calibration Move the jumper on J6 to then follow the same procedure as in the previous section Calibrating the On board Sensor 5 6 Calibrating a Remote Solid State Sensor SETTING SPAN GAS VALUE Step Setting the Span Gas Value Procedure Move the jumper on J6 to and move the jumper J7 to P2
36. tage at TP1 and TP2 for 0 VDC If transmitter has been calibrated TP1 and TP2 should be reading VDC The instrument will beep once for confirmation The system is now starting the zero calibration stabilization time 30 seconds If desired attach volt meter leads to test points TP1 and TP2 Monitor the voltage It should start moving towards zero gas value 0 VDC The instrument will beep twice when the calibration begins The instrument beeps three times indicating the procedure is finished 2 minutes USING A BACHARACH GDC 150 TO CALIBRATE THE SPAN Step Using a Bacharach GDC 150 to Calibrate the Span Procedure 1 At the GDC 150 With the transmitter still connected move the jumper to P2 and set voltage at TP1 and TP2 for 2 00 VDC 2 At the GDC 350 Move jumper from J6 to P3 and the jumper from J7 to P2 Using the UP and DOWN push buttons set the voltage to 2 00 VDC Now move jumper J7 to P4 The instrument will beep once for confirmation The system is now starting the span calibration stabilization time 30 seconds If desired attach volt meter leads to test points TP1 and TP2 Monitor the voltage The instrument will beep twice when the calibration begins The instrument beeps three times indicating the procedure is finished 2 minutes Move jumpers from J6 and J7 back to their P1 resting positions and remove the transmitter 6 SYSTEM MAINTENANCE The GDC 350 series system requires virtually no m
37. tion Remote Sensor Adjust Low Gas Alarm Ascending Value Remote Sensor Adjust High Gas Alarm Ascending Value Remote Sensor Adjust Low Gas Alarm Descending Value Remote Sensor Adjust High Gas Alarm Descending Value Remote Sensor Enable Disable Current Output Custom time delays for relays and internal audible alarm see page 23 IMPORTANT Set J6 jumper FIRST then set J7 jumper Upper bank jumper set J7 This bank of 9 jumper pairs allows specific functions for internal and external sensors The target sensor is set using the lower bank of jumpers 1st 2nd Lower bank jumper set J6 This bank of 4 jumper pairs allows setup and configuration for both internal and external Sensors Figure 4 2 J7 Top and J6 Bottom Jumper Banks 20 5909 9000 Rev 1 GDC 350 Operation Manual 4 5 Adjusting Alarm Setpoints The GDC 350 is configurable as a single or dual channel detector as such there are two ascending gas alarm set points and two descending gas alarm set points Almost all installations of the GDC 350 will use the factory default alarm set points Default set points are as follows LOW ALARM HIGH ALARM Caron Monoxide CO 25 ppm 100 ppm 200 ppm Nitric Oxide NO 35 ppm 50 ppm 100 ppm Nitrogen Dioxide NO2 0 7 ppm 1 5 ppm 10 ppm Sulfur Dioxide SO 1 0 ppm 5 0 ppm 20 ppm Propane C3Hs 2096 LEL 5096 LEL Methane CH4 2096 LEL 5096 LEL Refrigerants 1000 ppm 2000 ppm Temperature C 4
38. ture sensor is always considered channel 2 remote 4 8 Latching Relay Function The GDC 350 relays can be configured as latching for some applications To achieve this move the jumper from resting position P1 on the lower bank jumper set J6 to P4 This is the system configuration position Next move the jumper to P9 on the upper bank 7 Pressing the UP push button activates the latching function and the output between test points TP1 and TP2 is 4 V Pressing the DOWN push button de activates the latching function and the output between test points TP1 and TP2 is 0 V Once the desired latching or non latching function has been achieved move the jumper back to P1 on upper bank J7 and move the jumper back to P1 on lower bank J6 At that point all new settings will be written to the EEPROM 5909 9000 Rev 1 25 GDC 350 Operation Manual 4 9 LED Digital Display The GDC 350 system allows for a limited amount of customization of the P1 P2 P3 optional LED digital display using jumpers J3 J4 and J5 Li J3 e display be switched m m rnm J4 completely off e The display brightness level can J5 be adjusted to low or high for best 2 PS visibility in your application e display can indicate the gas type only with no numerical value for some applications Figure 4 5 Jumpers J3 J4 and J5 FUNCTION JUMPER SETTING Switch digital display ON Bridge P2 and P3 Switch digital display
39. ue Attach the volt meter leads to test points 1 and 2 Using the UP or DOWN push buttons achieve the calculated voltage on the volt meter Move the jumpers from J6 and J7 back to their P1 resting positions CALIBRATING THE NULL ZERO Calibrating the Null Zero Procedure 4 Attach a regulator to a cylinder of zero air or nitrogen B Insert the calibration adapter into the sensor opening on the front of the 2 enclosure Use a slight twisting motion as you gently push the calibration adapter into the sensor opening f the calibration adapter is hard to insert moisten the ring seal slightly then try re inserting it Open the regulator valve fully allowing zero air to flow over the sensor Move the jumper on J6 to P2 and move the jumper on J7 to P3 The audible alarm beeps once for confirmation The system is now starting the zero calibration stabilization time 30 seconds If desired attach the volt meter leads to test points TP1 and TP2 The reading should be 0 0 VDC The instrument will beep twice when the calibration begins Leave the zero air flowing over the sensor until the GDC 350 beeps three times indicating the procedure is finished 1 minute Move the jumpers from J6 and J7 back to their P1 resting positions and remove the zero air or nitrogen 5909 9000 Rev 1 29 GDC 350 Operation Manual CALIBRATING THE SPAN Calibrating the Span Procedure Attach a regulator to a cylinder of
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