Bacharach HGM300 Installation, Operation & Maintenance Instructions Manual Download Page 1

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HGM300 / RDM800

Refrigerant Gas Monitoring System

Instruction 3015-4148

Installation / Operation / Maintenance

Rev. 5 – April 2006

INSPECTION EQUIPMENT
MEASURING EQUIPMENT

61KN

Product Leadership • Training • Service • Reliability

Summary of Contents for HGM300

Page 1: ...RDM800 Refrigerant Gas Monitoring System Instruction 3015 4148 Installation Operation Maintenance Rev 5 April 2006 INSPECTION EQUIPMENT MEASURING EQUIPMENT 61KN Product Leadership Training Service Reliability ...

Page 2: ...dental or consequential damages in connection with the furnishing performance or use of this material No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Bacharach Inc Copyright 2000 2006 Bacharach Inc All Rights Reserved BACHARACH is a registered trademark of Bacharach Inc All other trademarks trade names service marks and ...

Page 3: ...ERATIONS 20 RDM800 MOUNTING INSTRUCTIONS 21 RDM800 INTERIOR SCHEMATIC 22 RDM800 ELECTRICAL WIRING 24 RDM800 COMMUNICATION CONNECTIONS 26 RDM800 CONNECTING EXTERNAL ALARMS 28 RDM800 OPERATION 29 RDM800 OVERVIEW 30 RDM800 SCREEN DISPLAYS 31 RDM800 SYSTEM PROGRAMMING 32 RDM800 SETUP PROGRAMMING 33 HGM300 SETUP PROGRAMMING 37 RDM800 ZONE SETUP PROGRAMMING 41 GENERAL OPERATION 44 WORKING WITH ALARMS 50...

Page 4: ...e the HGM300 Refrigerant Monitor and RDM800 Display Module Please read this manual carefully before use If you have a working knowledge of refrigerant monitors you will find this manual useful as a reference tool If you are new to the use of refrigerant monitors you can educate yourself about the principles of refrigerant gas detection and the proper operation of this device by reading this manual...

Page 5: ...ccessing the interior of this instrument Only qualified electrical maintenance personnel should perform connections and adjustments Always de energize the power supply before working inside the instrument Modifications to the Instrument Under no circumstances should this instrument be modified without written consent from Bacharach Inc Changes or modifications to this instrument not expressly appr...

Page 6: ...n personal injury or death Caution Statements The use of the word CAUTION in this manual denotes a potential hazard associated with the use of this equipment It calls attention to a procedure practice condition or the like which if not correctly performed or adhered to could result in damage to the equipment Hazard Symbols on Monitor This symbol indicates the need to consult this operating instruc...

Page 7: ...et points for the type of gasses being monitored All AC R systems leak some refrigerant In a good tight installation these background levels will be acceptably low and often do not require corrective action You can reduce nuisance alarms and needless service calls if the alarm levels are set at practical limits Refrigerant manufacturers define allowable exposure levels and threshold limit values i...

Page 8: ...achine interface by which you program the HGM300 acknowledge alarms and observe conditions inside of the mechanical room Note that there are two additional alarm relay contacts in the RDM800 that can be programmed to alarm with leak spill evacuate fault or monitor on Response to the Presence of Multiple Refrigerants Technically speaking the HGM300 is a refrigerant level monitor not a gas analyzer ...

Page 9: ...ower Mounting Brackets LED Indicators Water Trap Upper Mounting Bracket LED Indicators STANDARD ACCESSORIES FOR A 4 POINT SYSTEM 5 Line End Filters P N 3015 3420 Charcoal Filter T Bolt Bracket P N 3015 3125 HGM300 RDM800 Instruction Manual Water Trap Lower Mounting Bracket ...

Page 10: ...g holes in the HGM300 and RDM800 enclosure will void the warranty Please use knockouts provided for electrical connections WARNING Do not operate this equipment in the presence of flammable liquids vapors or aerosols Operation of any electrical instrument in such an environment constitutes a safety hazard WARNING Always de energize the power supply before working inside the instrument CAUTION The ...

Page 11: ...ts designed for 12 pan head fasteners Locate the four screws as shown in the diagram and leave the screw heads protruding approximately 3 16 HGM300 Mounting Specs Installation Hold the monitor flat against the mounting surface and allow it to slide down engaging the screw heads in the keyhole slots of the mounting brackets Adjust the screws as necessary to hold the monitor securely against the mou...

Page 12: ...installed to provide clean air for resetting the infrared zero baseline An exhaust line is installed to vent residual gas away from the monitor All air line connections are made on the left side of the enclosure as indicated in the photograph below HGM300 Side View Intake Ports Exhaust Port Purge Port RS 232 Connector Inlet Purge Ports RS 232 Inlet Purge Ports see below Exhaust Port ...

Page 13: ... termination point and other areas of the facility that will be monitored Ideally this line should terminate outdoors in a location that is not exposed to the elements This line does not require a line end filter If the exhaust line terminates outside the building position the tubing so that no water or moisture can enter it Connecting Sample Intake Lines The HGM300 is designed to accommodate up t...

Page 14: ...rs Power Supply Board Main Board Microcontroller Board Infrared Optical Bench Gas Sample Pump Primary Filter P N 3015 3071 Intake Manifold Solenoids Gas Sample Pump Infrared Optical Bench Microcontroller Board Main Board Power Supply Board 120 or 240 VAC Determined by Sales Order Intake Manifold Solenoid Connectors ...

Page 15: ...t Line Filter 240 VAC Units Only Factory Default Terminator IN OUT Dual 4 20 mAdc Outputs Signal Out Only DO NOT APPLY POWER RS 485 Connector Relay Connector Alarm 1 2 3 Fault 4 20 mAdc Interface Board Optional AC Power ON OFF Switch Ground Stud CPU Reset Node Address Switches AC Power ON OFF Switch F1 F2 HGM300 Fuses Refer to Maintenance Section for values Page 64 F3 Connects to Aux AC Out Connec...

Page 16: ...id to the monitor s Ground Stud 240 VAC Installation Locate the AC Input Line Filter s black and white wires and the Ground Stud on the inside of the enclosure Page 7 Using wire nuts secure the incoming AC power Line 1 black and Line 2 white wires to the AC Input Line Filter as shown in the following illustration Using the supplied crimp on ring terminal washers and nuts connect the AC input groun...

Page 17: ...Instruction 3015 4148 9 HGM300 AC Input Power and Ground Connections ...

Page 18: ...485 TO MONITORS connector using the same color code as used on the HGM300 Integrating with Building Management Systems The HGM300 may be connected directly to a Building Management System using a shielded twisted pair cable The cable from the Building Management System is connected to the RS 485 connector inside the HGM300 MODBUS RTU is the standard communication protocol Use any of the remaining ...

Page 19: ...System Each HGM300 on the network must have a distinct node address The node address may be set from 1 to 15 Four dip switches numbered 1 2 4 8 on the main circuit board are used to define this value by setting the correct combination of dip switches to their ON positions The node address is the sum of the switch numbers that are ON Example For node address 5 switches 1 and 4 are ON For node addre...

Page 20: ...nagement Systems set to a 0 or 1 address both respond to messages from the RDM800 as address 1 therefore you should not have a unit set to 0 and another set to 1 on the same network If the HGM300 network is connected directly to a Building Management System it may not be connected to the RDM800 However the RDM800 has two communication ports an upstream port labeled TO HOST and a downstream port la...

Page 21: ... through serial port connection A three wire connection is used RXD TXD and GND No hardware flow control is used The HGM300 software automatically configures COM1 to match the HGM300 RS 232 communications parameters NOTE 3 Occasionally the laptop connection will not connect properly and only two beeps are heard and the program times out The cure for this is to disconnect the RS 232 cable and cycle...

Page 22: ...imum without a filename extension and then press ENTER The program will automatically add cfg to the filename that you typed To Open a Saved Program Open software go to FILE PATH and clear the old path and type in the proper drive for the saved program A or C etc Press ENTER select the proper program press ENTER again The saved program will be downloaded into the software To Send a Saved Program t...

Page 23: ...screen is then brought into Word To save the file select SAVE AS select the proper drive and file name and then press SAVE USB Type Laptops Some of the newer laptops have USB ports and no RS 232 9 pin ports You will be required to purchase a PCMCIA card that provides an RS 232 output We recommend the PCMCIA card manufactured by SEALEVEL SYSTEMS INC 155 TECHNOLOGY PLACE P O BOX 830 LIBERTY SC 29657...

Page 24: ...e connector orienting them as shown in the diagram below Check to make sure the polarity matches the wiring at the external device When you are through securing the connections carefully plug the connector back onto the circuit board NOTE When one or both current loop outputs are not used install a jumper wire between the ground the unused loop terminal s to prevent the system from generating a cu...

Page 25: ...ior of the monitor Locate the relay connector Page 7 and remove it from the circuit board Secure the leads to the connector orienting them as shown in the diagram below When you are through securing the connections carefully plug the connector back onto the circuit board HGM300 Relay Connector NOTE Each relay may be connected as normally open NO or normally closed NC Latching Non Latching refer to...

Page 26: ...to the Common on the relay block Connect one end of strobe or horn to the NO of whichever level of alarm is appropriate for application The other end of strobe or horn is connected to the Line of the auxiliary power connector 5 A max Aux Power LEAK SPILL EVACUATE FAULT Line Neutral Line Neutral Horn Strobe Main AC Input ...

Page 27: ...Instruction 3015 4148 19 RDM800 Installation RDM800 Oblique Photo Upper Lower Mounting Brackets Upper Mounting Bracket Lower Mounting Bracket ...

Page 28: ...formed by a certified electrician and should comply with all applicable local state and federal electrical safety codes WARNING Always de energize the power supply before working inside the instrument CAUTION The RDM800 contains sensitive electronic components that can be easily damaged Be careful not to touch or disturb any of these components Inspection The RDM800 has been thoroughly inspected a...

Page 29: ...s designed for 12 pan head fasteners Locate the four screws as shown in the diagram and leave the screw heads protruding approximately 3 16 RDM800 Mounting Specs Installation Hold the display module flat against the mounting surface and allow it to slide down engaging the screw heads in the keyhole slots of the mounting brackets Adjust the screws as necessary to hold the unit securely against the ...

Page 30: ...8 RDM800 Interior Schematic Microcontroller Board CPU Reset Switch Main Board Ground Stud AC Power Front Panel Chassis Power Supply Board 120 230 VAC Input Microcontroller Board CPU Reset Switch Main Board AC IN Connector T3 ...

Page 31: ...r RS 485 Connectors Terminator Switches Relay Connector Fuses 1 Amp 250 VAC P N 3015 4011 Terminator Switches F2 F1 TO MONITORS RS 485 to HGM300 Monitors TO HOST RS 485 to Building Management System Relay Connector AC IN Connector T3 ...

Page 32: ...ire green along with the ground wire connected to the front panel to the unit s Ground Stud 230 VAC Installation Locate the AC Input Line Filter s black and white wires and the Ground Stud on the inside of the chassis Page 22 Using wire nuts secure the incoming AC power Line 1 black and Line 2 white wires to the AC Input Line Filter as shown in the following illustration Using the supplied crimp o...

Page 33: ...Instruction 3015 4148 25 RDM800 AC Input Power and Ground Connections ...

Page 34: ...t the middle note the wire color Connect the ground to the GND connection point Make the wire run to the HGM300 and connect the twisted shielded pair to the HGM300 RS 485 connector Page 7 using the same color code as used on the RDM800 Integration with Building Management System A second RS 485 connector inside the RDM800 allows a Building Management System to talk to the HGM300 network through th...

Page 35: ...2 The terminator switch for the RS 485 TO HOST connector is shipped from the factory in the terminated or IN position This is the correct setting if the RDM800 is the last device on the network chain If other devices are daisy chained through the RDM800 the terminator must be moved to the OUT position Refer to Connecting to a Building Management System on Page 12 Locate each terminator switch and ...

Page 36: ...age 36 Connection Use the AC conduit or any of the remaining service knockouts to gain access to the interior of the RDM800 Locate the relay connector Page 23 and remove it from the circuit board Secure the wire leads to the connector orienting them as shown in the diagram below When you are through securing the connections carefully plug the connector back onto the circuit board RDM800 Relay Conn...

Page 37: ...Instruction 3015 4148 29 RDM800 Operation RDM800 Exterior Schematic Display Screen Navigation Buttons Cursor Pad LED Indicators LED Indicators Display Screen Cursor Pad Navigation Buttons ...

Page 38: ...is used to move about screens enter setup information and choose between setup parameters When entering information the LEFT RIGHT keys move the cursor across an entry field while the UP DOWN keys scroll data entry options The ENTER key is used to accept data entries LED Indicators The three LED indicators provide a summary of network status GREEN Glows when the system is operational RED Glows whe...

Page 39: ...pendix for a logic diagram of all the screen displays There is a 15 minute warm up period after power is first applied Under HGMS WARM UP is displayed The green indicator on the HGM will blink during the warm up period IMPORTANT DO NOT plug the gas sample hose or inlet port of any zone The monitor will perform a vacuum test during start up and a plugged zone will give a false indication System Scr...

Page 40: ...ns to observe settings or monitor network status The password can be alpha numeric The unit is shipped with password protection OFF Entering a password in the RDM Setup Screen 1 enables password protection Once protection is enabled the user will be prompted to enter the password when they first attempt to edit a setup parameter To enter a password 1 From the top level System Screen press the RDM ...

Page 41: ...s the field to the value you wish to edit Use the UP DOWN cursor keys to modify the field value and press the ENTER key to accept your entries When you are through editing the date time value do one of the following Press the SET HGM CLOCKS key to synchronize all HGM300 monitors to the current date time setting Press the QUIT key to reject all edits and revert to the previous setting Press the SET...

Page 42: ... adjacent key to adjust the number 2 Use the UP DOWN cursor keys to modify the setting 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting NOTE When first powered up the RDM800 will automatically detect all HGM300 s on the network with unique node addresses Refer to HGM Node Address Dip Switch Settings on Page 11 HGM Baud Rate This is the baud rate of all HGM300 monitor...

Page 43: ...op bit value used by the Building Management System 1 Press the adjacent key to adjust the address 2 Use the UP DOWN cursor keys to modify the setting 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting Building Management System Baud Rate This is the baud rate of the Building Management System 1 Press the adjacent key to adjust the baud rate 2 Use the UP DOWN cursor ke...

Page 44: ...select unused monitor on evacuate spill leak fault or alarm 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting HGM Node Address This value is the node address from 1 to 15 assigned to each HGM300 which is on the network These values must match the dip switch settings on each HGM300 circuit board Refer to HGM Node Address Dip Switch Settings on Page 11 1 Press the adjac...

Page 45: ...d HGM Setup Screen From the System Screen press the key adjacent to the target HGM300 to go to that unit s HGM Setup Screen 1 HGM Setup Screen 1 From HGM Setup Screen 1 press the SETUP key to go to HGM Setup Screen 2 Press the QUIT key to return to the System Screen HGM Setup Screen 2 ...

Page 46: ...ting 2 Use the UP DOWN cursor keys to toggle between settings AUTO Non latching Alarm relay will automatically de energize when the gas level drops below its alarm point MANUAL Latching Alarm relay remains energized and will not release until the alarm condition has been manually acknowledged Refer to Acknowledging Alarms on Page 52 3 Press ENTER to accept the new entry or QUIT to revert to the pr...

Page 47: ...oss the entry field and the UP DOWN cursor keys to modify the individual characters 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting Re Zero Mode This parameter defines the frequency at which the instrument re zeros the optical sensor 1 Press the adjacent key to adjust the setting 2 Use the UP DOWN cursor keys to toggle between settings AUTO Sets the instrument to re...

Page 48: ...ut Sets the length of time the Service Mode is in effect Stops the monitor for up to 240 minutes 4 hrs to allow for servicing the unit Refer to Service Mode on Page 62 1 Press the adjacent key to adjust the setting 2 Use the LEFT RIGHT cursor keys to move across the entry field and the UP DOWN cursor keys to modify the individual numbers 3 Press ENTER to accept the new entry or QUIT to revert to t...

Page 49: ...e name 2 Use the LEFT RIGHT cursor keys to move across the entry field and the UP DOWN cursor keys to modify the individual characters 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting Refrigerant This is the type of refrigerant gas being monitored 1 Press the adjacent key to adjust the setting 2 Use the UP DOWN cursor keys to scroll through the list of gas types 3 Pr...

Page 50: ...inutes 24 hrs A value of 000 indicates that each measurement for a given zone is logged into the trend log 1 Press the LOG INTERVAL key to adjust the log interval value 2 Use the LEFT RIGHT cursor keys to move across the entry field and the UP DOWN cursor keys to modify the setting 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting Navigating to the 2nd Zone Setup Scre...

Page 51: ...han the evacuate level and greater than the leak level Evacuation Level This is the concentration level in PPM that will activate an evacuate alarm condition 1 Press the adjacent key to adjust the value 2 Use the UP DOWN cursor keys to modify the setting 3 Press ENTER to accept the new entry or QUIT to revert to the previous setting NOTE This value must be greater than the spill level Re Setting t...

Page 52: ...he status information for all zones To display all the zones being monitored go to the System Screen page 31 and press the ZONES key Working with the Zone Screen The top level Zone Screen provides a summary view of zone activity across the network Each screen displays information from a single HGM300 monitor as indicated at the top of the display Each screen can display information for up to 8 zon...

Page 53: ...o that Zone s Setup Screen 1 Page 41 To release the zone from the hold mode press and hold down the adjacent key until the unit beeps and the screen display reverts to normal You may also press and hold down the key adjacent to any other zone to release the current zone and put the new zone on hold Alarm Conditions When an alarm condition is detected anywhere on the network the red ALARM LED will ...

Page 54: ...e Alarm Summary Screen Page 50 Refer to Working with Alarms on Page 50 to learn more about responding to alarms Fault Conditions If a system malfunction occurs the yellow FAULT LED will glow Additionally an external alarm device may activate and an audible alarm may sound if those features have been enabled Pages 28 35 From the top level Zone Screen Page 44 press the SYSTEM key to go to the System...

Page 55: ...is detected anywhere on the network the red ALARM LED will glow Additionally an external alarm device may activate and an audible alarm may sound if those features have been enabled Pages 28 35 The ALARMS box in the upper right hand corner of the screen will blink and the count value will change to indicate the total number of alarm conditions on the network To investigate an alarm press the ALARM...

Page 56: ...m Log Screen Alarm Log Screen Use the LEFT RIGHT and UP DOWN cursor keys to move through the log The Alarm log shows the last 20 alarm events An alarm event is the occurrence of any alarm any change in alarm level or the clearing of any alarm The alarm level is indicated by an L leak S spill or E evacuate The time and date of the alarm are displayed when the cursor is placed over the alarm ...

Page 57: ...nd if those features have been enabled Pages 28 35 The FAULTS box on the right of the screen will blink and then counts the number of HGM units on the system with a fault To investigate a fault press the FAULTS key to go to the Fault Screen Page 154 Refer to Working with System Faults on Page 54 to learn more about responding to system faults System Screen Fault Mode Fault Condition ...

Page 58: ...ave to be acknowledged for the system to return to normal operation Responding to Alarms There are two screens from which an operator can respond to alarms From the System Screen Page 31 press the key adjacent to the blinking ALARMS field to go to the Alarm Summary Screen From the top level Zone Screen Page 44 press the ALARMS key at the bottom of the display window to go to the Alarm Summary Scre...

Page 59: ...m including Complete location information Refrigerant and current PPM Peak PPM and peak time Type of alarm alarm time and date This screen provides the following three navigation keys at the bottom of the display ACK Acknowledges the alarm as described in the next section QUIT Returns you to the Alarm Summary Screen SETUP Takes you to Zone Setup Screen 1 Page 41 which enables you to review the zon...

Page 60: ...the alarm has been acknowledged Repeat this procedure to acknowledge any remaining alarms Alarm Summary Screen Acknowledge Mode Once all the alarms associated with a given HGM300 are acknowledged its RED LED will turn off and any external alarms connected to the HGM300 relays will de activate All pending alarms across the entire network must be acknowledged before the RDM800 returns to normal oper...

Page 61: ...tor s HGM Setup Screen 1 Next press the ZONES key to go to Zone Setup Screen 1 and then press the TREND key at the bottom of the display to go to the Trend Screen From the top level Zone Screen Page 44 press the key adjacent to the zone you wish to work with to first display its Zone Setup Screen 1 Then press the TREND key at the bottom of the display to go to the Trend Screen Trend Screen The tre...

Page 62: ...ages 28 35 Depending on the nature of the fault the HGM300 may or may not continue to operate normally Under a non critical fault condition the HGM300 will continue to measure and log data but some peripheral functions may be compromised Under a critical fault condition action is required for the HGM300 to operate normally The table on the following page lists the various fault conditions and expl...

Page 63: ...l the factory with this information for further instructions BENCH TEMP FAULT Optical bench is outside of normal operating range or sensor has failed Check the installation to verify that the monitor is not being subjected to extreme temperatures Check the Diagnostic Screen for the ZERO temperature BNCH temperature and BOX temperature Call the factory with this information for further instructions...

Page 64: ...OW LED will turn off and any external alarms connected to the monitor s alarm relays will also turn off The RDM800 will return to normal operation the next time it polls the affected monitor Viewing Fault Log A data log of the last 20 fault conditions is retained in memory From the Fault Screen Page 54 press the LOG key to view a display of the fault log Fault Log Screen This screen lists potentia...

Page 65: ...the System Screen Page 31 press the key adjacent to the target HGM300 unit to go to that monitor s HGM Setup Screen 1 Page 37 and then press the CAL key to go to the selected monitor s Calibration Screen Calibration Screen Adjusting Calibration Factor The factory default cal factor for standard units is 1 000 This value may be different if the high accuracy option is ordered Proceed as follows to ...

Page 66: ...ur prior to performing a calibration Prepare the HGM300 for sampling by initially setting its CAL FACTOR to 1 000 Page 57 Next set up the HGM300 for a logging interval of zero minutes Page 42 and place the HGM300 in its zone hold mode for the zone you wish to use for calibration purposes Page 45 Connect the sample bag directly to the intake port for the zone you have set up and allow the HGM300 to...

Page 67: ...p the appropriate zone for NEW GASX where X is the number of the place holder you used Program the instrument for a new gas as follows 1 From the Calibration Screen use the PREV GAS or NEXT GAS keys to scroll through the list of available choices until a NEW GAS box is displayed New Gas Screen 2 Press the NEW GAS NAME key to assign a name to the refrigerant a Use the LEFT RIGHT cursor keys to move...

Page 68: ... range from 3 900V to 4 500V LINE 2 Average Detector Voltage This is simply a running average of the values displayed in line 1 LINE 3 Zero Voltage This is the IR sensor output that was stored during the last purge cycle and has the same range as line 1 LINE 4 Noise This is a 16 point running average of the noise portion of IR bench output This reading is valuable mainly when refrigerant is NOT pr...

Page 69: ...rom the temperature sensor itself This value can range from ambient to ambient 15 degrees C LINE 10 Box Temperature This is the current internal enclosure temperature along with the raw voltage from the temperature sensor and has the same range as line 9 LINE 11 Pressure This is the current absolute manifold pressure in PSIA along with the output voltage of the pressure sensor This value should al...

Page 70: ...alarms activated From the System Screen Page 31 select the key adjacent to the HGM unit you wish to place into its Service Mode From HGM Setup Screen 1 Page 37 press the SERVICE MODE ENTRY key twice within 3 seconds Note that the System Screen will show what monitors are in the Service Mode To exit the Service Mode again press the SERVICE MODE ENTRY key twice within 3 seconds HGM Setup Screen 1 Sy...

Page 71: ...Instruction 3015 4148 63 Appendix ...

Page 72: ...kit containing one primary filter and one charcoal filter as P N 3015 3423 Servicing Air Lines System air lines P N 3015 3235 should be checked periodically for obvious signs of kinks damage and contamination Replace the tubing as required The end line filters P N 3015 3420 should be checked periodically and replaced when there are obvious signs of contamination To service the filter simply remove...

Page 73: ...low the instructions earlier in this manual to install the air lines and complete the zone programming steps The HGM300 setup must also be updated to recognize the new zones 4 20 mAdc Interface Board The optional 4 20 mAdc Interface Board P N 3015 3133 allows the operator to take advantage of the current loop interfaces provided for connection of external devices to the HGM300 The interface board ...

Page 74: ...66 Instruction 3015 4148 RDM800 Logic Diagram ...

Page 75: ...13 100 300 500 R114 100 300 500 R123 15 25 35 R124 100 300 500 R134a 100 300 500 R401a 100 300 500 R402a 100 300 500 R402b 100 300 500 R404a 100 300 500 R407a 100 300 500 R407c 100 300 500 R409a 100 300 500 R410a 100 300 500 R500 100 300 500 R502 100 300 500 R503 100 300 500 R507 100 300 500 R508b 100 300 500 H1301 100 300 500 Allowable Exposure Level AEL ASHRAE 34 1992 ...

Page 76: ... such as the RDM800 or a Building Management System over the RS 485 serial interface The monitor is configured with a two wire RS 485 serial bus and therefore data transmission occurs in half duplex mode Consequently only one device may be in transmit mode at any given time Programmers should refer to the MODBUS Protocol Reference Guide for details and more comprehensive instructions The guide is ...

Page 77: ...ctures become the destination for responses to read queries and sources for preset register commands When a read holding register query is made by the master device the HGM300 responds by sending the contents of the structure referenced by the specified register After the master validates the HGM300 response using the CRC bytes it must then move the data into its matching data structure before ind...

Page 78: ...portant to understand that the RDM800 will only pass messages through to the HGM300 when the RDM800 is either in the SYSTEM screen or the ZONE VIEW screen If the RDM800 is in any other screen it will return a MODBUS busy exception response exception code 06 All RDM800 screens except the SYSTEM and ZONE VIEW screens have a 10 minute timeout interval after which the screen will return to either the ...

Page 79: ...surement of sensors Rel Hold 0x0017h W Release HGM300 out of hold mode Hold Zone 0x0018h W Put HGM300 into hold mode Fault Log 0x19xxh R 20 most recent fault events xx 00 or 01 Alarm Log 0x1Axxh R 20 most recent alarm events xx 00 01 or 02 Serv Mode 0x001Bh W Puts HGM300 into service mode Rel Serv 0x001Ch W Release HGM300 from service mode PPM 0x001Eh R PPM values for all zones Zone Log 0x3yxxh R ...

Page 80: ...es Alarm Operation Manual Acknowledge 0 Auto Acknowledge 1 DEFAULT 0 Num_Zones UC 1 byte Number of install zones Value initialized during auto detect during Power On Self Test UNUSED TIM 13 bytes UNUSED Rezero_Mode UC 1 byte Defines rezero mode Auto Rezero 0 Rezero every zone 1 DEFAULT 0 Hold_Time UI 2 byte Length of zone hold interval in minutes DEFAULT 15 minutes Det_Limit UC 1 byte Minimum dete...

Page 81: ...ount UC 1 byte Number of alarms that are currently active DO NOT MODIFY UNUSED UC 1 byte UNUSED Loop_Card UC 1 byte Value 1 if 4 20mA card has been detected DO NOT MODIFY Fault UI 2 bytes See Note Below Fault Flag Structure uses bitwise access to 16 bit word as defined below Bit 15 MSB Clipping Fault A D out of range Bit 14 Zero Fault Zero voltage outside factory limits Bit 13 No Flow No flow on a...

Page 82: ...larm UC 1 bytes Alarm Status 0 no alarm 1 leak 2 spill 3 evac Leak Level UI 2 bytes Level to trigger a leak alarm in PPM DEFAULT 100 Spill Level UI 2 bytes Level to trigger a spill alarm in PPM DEFAULT 300 Evac Level UI 2 bytes Level to trigger a evacuate alarm in PPM DEFAULT 500 Peak PPM UI 2 bytes Highest Recorded PPM in zone Peak Time TIM 13 bytes Date an time of highest peak see note 2 for for...

Page 83: ...he system register to 0 In this mode if an alarm condition occurs an HGM300 alarm will be created In order for the alarm to be removed the MODBUS master will write a 0 to the ALARM parameter in the ZONE register This will cause the alarm to be silenced in the HGM300 i e the alarm relays will return to their normal state and the ALARM lamp will be extinguished The next time the zone with the alarm ...

Page 84: ...to the code New Gases can be added in the field by selecting a similar existing cal curve and then defining a cal factor that will bring the accuracy within the desired range It is strongly recommended that any New Gas curves that are added be done in conjunction with help from Bacharach Inc Date Time Register Register 0x0015h R W 14 bytes Variable Type Length Description Date_Time Time 14 bytes C...

Page 85: ... 4 Optical bench temp in degrees C at last zero interval Box_Z_T Float 4 Box temp in degrees C at last zeroing PkPk_int UI 2 Current peak to peak A D counts from detector PkPk Float 4 Current peak to peak voltage from detector Ave_PkPk Float 4 Running average voltage from detector Zero_PkPk Float 4 Voltage measured at last zeroing Noise Float 4 Largest Change in running average AU Float 4 Current ...

Page 86: ...ce Read the HGM300 Status Register 0x0011h Modify the content of the status register structure to change the MODE parameter to zone hold mode and the active zone parameter to the zone which you wish to hold Send this updated status register structure back to the HGM300 using PRESET MULTIPLE REGISTER COMMAND to the HOLD ZONE REGISTER 0x0018h To Release the Zone Hold Use the Following Sequence of St...

Page 87: ...value as defined in NOTE 2 of Zone Data Ptr UC 1 byte Pointer to most recent event Unused UC 1 byte Alarm Log Register Register 0x1A00h 0x1A01h 0x1A02h R 582 bytes These registers contain the 20 most recent alarm events the time they occurred and a pointer to the most recent event The data is split into 3 registers and should be recombined into an appropriate structure after all three registers ha...

Page 88: ...nterval defined by the service_mode_TO parameter in the System Data Register In order to place the HGM300 into service mode use the following sequence Read the HGM300 Status Register 0x0011h Modify the content of the status register structure to change the MODE parameter to service mode Send this updated status register structure back to the HGM300 using PRESET MULTIPLE REGISTER COMMAND to the SER...

Page 89: ... is 0x30yyh for zone 2 the register address is 0x31yyh etc The data for each zone is sent in 8 consecutive registers due to MODBUS RTU message length constrains The addresses are defined by the yy place in the above address For zone 1 all log data can be obtained by reading 0x3000h 0x3001h 0x3002h 0x3007h The first seven registers contain 200 bytes each and the last register contains 102 bytes Aft...

Page 90: ...o have Seller s Service Department repair the equipment at Purchaser s facility Purchaser must contact Seller s Service Department in Newnan Georgia to arrange for a Service call Parts will be free under the above terms but there will be a charge for labor and travel expenses from Seller s facility in New Kensington PA The conditions of any tests or equipment hereunder alleged to be defective shal...

Page 91: ...mproper installation or failure to thoroughly read and comply with the instructions provided in the Operations and or Service Manuals Scheduling of all field servicing is at the discretion of the Factory Service Department and will be based upon customer need and the availability of personnel Warranty field service shall be limited to the continental United States The Bacharach Inc is not liable f...

Page 92: ...glow steady when any point is above the alarm setting or will be flashing when the unit is in service mode One yellow light will glow when there is a system fault Temperature Drift 0 3 of reading per degrees C Sampling Mode Automatic or manual hold Re Zero Auto or on zone change Response Time 5 to 120 seconds depending on air line length and number of zones System Noise Less than 40dB A 10 feet Mo...

Page 93: ...ed Fault Indication Yellow LED glows and fault condition is displayed Password Protection The RDM800 can be password protected to prevent the unauthorized editing of setup parameters without disturbing the ability to monitor system outputs Power Safety Mode Fully automatic system reset all parameters maintained Monitoring Distance Up to 1500 feet from furthest HGM300 Communications Full two way co...

Page 94: ...Headquarters 621 Hunt Valley Circle New Kensington PA 15068 Website www bacharach inc com E mail help bacharach inc com Printed in U S A Registered Trademark of Bacharach Inc ...

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